Per Ahlberg
Professor emeritus
My research encompasses palaeontology (from systematics and phylogeny to palaeoecology), palaeobiogeography, palaeogeography, stratigraphy and sedimentary geochemistry. Much of my effort is being directed to interpretation of the history of life and its fossil record in the Cambrian and Ordovician, and the related issue of high-resolution of geologic time through these periods using multiple chronostratigraphic methods. Altogether, this has enabled me to address a wide spectrum of palaeobiological and geological problems and has resulted in well over 100 published papers and books.
Currently, I am involved in several topically and geographically wide-ranging projects. These fall under five broad themes: (1) The Ordovician deep-water shelf successions of Baltica – stratigraphy, faunal turnovers and palaeoenvironmental changes. Principal collaborators: Stig M. Bergström (Columbus, Ohio, USA), Mikael Calner (Lund, Sweden), Mats E. Eriksson (Lund, Sweden), Sven Egenhoff (Fort Collins, Colorado, USA), David A.T. Harper (Durham, England), Michael M. Joachimiski (Erlangen, Germany), Frans Lundberg (Lund, Sweden), Jörg Maletz (Berlin, Germany) and Seth A. Young (Tallahassee, Florida, USA); (2) Cambrian chronostratigraphy and intercontinental correlation. Principal collaborators: Loren E. Babcock (Columbus, Ohio, USA), Gerd Geyer (Würzburg, Germany), Arne T. Nielsen (Copenhagen, Denmark) and Shanchi Peng (Nanjing, China); (3) Cambrian palaeogeography and palaeobiogeography. Collaborators: J. Javier Álvaro (Madrid, Spain), Loren E. Babcock (Columbus, Ohio, USA) and Anna Zylińska (Warsaw, Poland); (4) Trilobite palaeobiology – functional morphology, life habits, ontogeny, and evolution. Principal collaborators: Loren E. Babcock (Columbus, Ohio, USA), Peter Cederström (Eslöv, Sweden), Euan N.K. Clarkson (Edinburgh, UK), Mats E. Eriksson (Lund, Sweden), Gerd Geyer (Würzburg, Germany), Lukáš Laibl (Prague, Czech Republic) and Brigitte Schoenemann (Cologne, Germany); (5) The Alum Shale Formation of Scandinavia – stratigraphy, faunas and depositional environment. Principal collaborators: Loren E. Babcock (Columbus, Ohio, USA), Euan N.K. Clarkson (Edinburgh, UK), Sven Egenhoff (Fort Collins, Colorado, USA), Mats E. Eriksson (Lund, Sweden), David A.T. Harper (Durham, England), Arne T. Nielsen (Copenhagen, Denmark), Timothy P. Topper (Stockholm, Sweden) and Anna Zylińska (Warsaw, Poland).
Since September 2012, I am secretary of the International Subcommission on Cambrian Stratigraphy (ISCS). The primary objectives of the ISCS are to define the series and stages of the Cambrian by means of the internationally agreed rules of the International Commission of Stratigraphy (ICS) and to provide the international forum for scientific discussions and interchange on all aspects of the Cambrian.
Publications
Displaying of publications. Sorted by year, then title.
Re-Os geochronology and geochemical evolution of late Cambrian to Middle Ordovician Alum and Tøyen shales, Sweden
Vineet Goswami, Judith L. Hannah, Holly J. Stein, Per Ahlberg, Jörg Maletz, et al.
(2024) Global and Planetary Change, 242
Journal articleThe Ordovician section of the Hällekis Quarry, Sweden
Per Ahlberg, David A.T. Harper, Lars E. Holmer, Anders Lindskog, Birger Schmitz
(2024) The Second 100 IUGS Geological Heritage Sites , p.58-59
Book chapterInsights into the morphology of Sphenothallus (Cnidaria): new features identified in an old genus from the Carboniferous (Pennsylvanian, Bashkirian) of western Ireland
Eamon Doyle, Per Ahlberg, David Harper
(2024) Irish Journal of Earth Sciences, 42 p.237-247
Journal articleObituary – Sven Laufeld 1939–2023
Stig M. Bergstrom, Louis Liljedahl, Birger Schmitz, Yngve Grahn, Robert Lilljequist, et al.
(2024) The Palaeontological Association Newsletter, 116 p.92-93
Journal articleThe Ordovician of Scandinavia: a revised regional stage classification
Arne T. Nielsen, Per Ahlberg, Jan Ove R. Ebbestad, Øyvind Hammer, David A.T. Harper, et al.
(2023) Geological Society of London Special publications, 532 p.267-315
Journal articleIntroduction to the Ordovician of Scandinavia
Arne T. Nielsen, Per Ahlberg
(2023) Geologiska Föreningen Specialpublikation, 3 p.6-8
Book chapterRegional geology of Västergötland Province, Sweden
Per Ahlberg, Mikael Calner, Oliver Lehnert, Linda M. Wickstrom, Anders Lindskog
(2023) Geologiska Föreningen Specialpublikation, 3 p.9-12
Book chapterProtracted oxygenation across the Cambrian–Ordovician transition : A key initiator of the Great Ordovician Biodiversification Event?
Nevin P. Kozik, Seth A. Young, Anders Lindskog, Per Ahlberg, Jeremy D. Owens
(2023) Geobiology, 21 p.323-340
Journal articleProgressive marine oxygenation and climatic cooling at the height of the Great Ordovician Biodiversification Event
Nevin P. Kozik, Seth A. Young, Per Ahlberg, Anders Lindskog, Jeremy D. Owens
(2023) Global and Planetary Change, 227
Journal articleSubmarine metalliferous carbonate mounds in the Cambrian of the Baltoscandian Basin induced by vent networks and water column stratification
J. Javier Álvaro, Lars E. Holmer, Yanan Shen, Leonid E. Popov, Mansoureh Ghobadi Pour, et al.
(2022) Scientific Reports, 12
Journal articleRe-Os geochronology for the Cambrian SPICE event : Insights into euxinia and enhanced continental weathering from radiogenic isotopes
Alan D. Rooney, Alexie E.G. Millikin, Per Ahlberg
(2022) Geology, 50 p.716-720
Journal articleHigh-resolution carbon isotope chemostratigraphy of the middle Cambrian to lowermost Ordovician in southern Scandinavia : Implications for global correlation
Zhengfu Zhao, Per Ahlberg, Nicolas Thibault, Tais W. Dahl, Niels H. Schovsbo, et al.
(2022) Global and Planetary Change, 209
Journal articleEarly Cambrian brachiopod-dominated shell concentrations from North-East Greenland : Environmental and taphonomic implications
David A.T. Harper, Svend Stouge, Jørgen L. Christiansen, Timothy P. Topper, Carl Alwmark, et al.
(2021) Global and Planetary Change, 204
Journal articleReply to ‘Uppermost Cambrian carbon chemostratigraphy : The HERB and undocumented TOCE events are not synonymous’
Maoyan Zhu, Loren E. Babcock, Shanchi Peng, Per Ahlberg
(2021) Geological Magazine, 158 p.1323-1326
Journal articleMiaolingian (Cambrian) trilobite biostratigraphy and carbon isotope chemostratigraphy in the Tingskullen drill core, Öland, Sweden
Per Ahlberg, Frans Lundberg, Mikael Calner, Oliver Lehnert, Peter Dahlqvist, et al.
(2021) Estonian Journal of Earth Sciences, 70 p.18-35
Journal articleDapingian to lower Darriwilian (Middle Ordovician) graptolite biostratigraphy and correlation of the Krapperup drill core, Scania, Sweden
Jörg Maletz, Per Ahlberg
(2021) GFF, 143 p.16-39
Journal articleUpper Darriwilian (Middle Ordovician) graptolite biostratigraphy and correlation of the Krapperup drill core, Scania, Sweden
Jörg Maletz, Per Ahlberg
(2021) GFF, 143 p.360-383
Journal articleKilian Stobæus and his fossil collections - science, aesthetics and emotions
Magdalena Naum, Cajsa Sjöberg, Håkan Håkansson, Anders Lindskog, Mats Eriksson, et al.
(2021) Studies in the History of Daily Life (800-1600) , p.235-256
Book chapterTrilobites
Shanchi Peng, Loren E. Babcock, Per Ahlberg
(2020) Geologic Timescale 2020, 1 p.36-36
Book chapterThe Cambrian Period
Shanchi Peng, Loren E. Babcock, Per Ahlberg
(2020) Geologic Time Scale, 2 p.565-565
Book chapterThe Furongian (upper Cambrian) Alum Shale of Scandinavia : revision of zonation
Arne Thorshøj Nielsen, Magne Høyberget, Per Ahlberg
(2020) Lethaia, 53 p.462-485
Journal articleOrdovician graptolite biostratigraphy of the Röstånga-2 drill core (Scania, southern Sweden)
Jörg Maletz, Per Ahlberg, Frans Lundberg
(2020) GFF, 142 p.206-222
Journal articlePyritization history in the late Cambrian Alum Shale, Scania, Sweden: Evidence for ongoing diagenetic processes
Neil S. Fishman, Sven O. Egenhoff, Heather A. Lowers, Adam R. Boehlke, Per Ahlberg
(2020) aapg memoir, 120 p.83-102
Book chapterThe δ13C chemostratigraphy of Ordovician global stage stratotypes : geochemical data from the Floian and Sandbian GSSPs in Sweden
Stig M. Bergström, Birger Schmitz, Fredrik Terfelt, Mats E. Eriksson, Per Ahlberg
(2020) GFF, 142 p.23-32
Journal articleGraptolite biostratigraphy of the Ordovician Almelund and Sularp Shale formations of the Fågelsång-3 drill core, Scania, Sweden
Jörg Maletz, Per Ahlberg
(2020) GFF, 142 p.33-51
Journal articleOrdovician δ13C chemostratigraphy : A global review of major excursions and their ties to graptolite and conodont biostratigraphy
Stig M. Bergström, Mats Eriksson, Per Ahlberg
(2020) Stratigraphy and Timescales : Carbon Isotope Stratigraphy, 5 p.319-351
Book chapterPetrified organisms: the fossil collection of Kilian Stobæus
Anders Lindskog, Per Ahlberg, Mats Eriksson
(2020) Collecting curiosities : eighteenth century Museum Stobæanum and the development of ethnographic collections in the nineteenth century , p.116-123
Book chapterMinnesord Sven Stridsberg
Per Ahlberg, Mats Eriksson, Kent Larsson, Johan Lindgren
(2020) Geologiskt forum
OtherThe fossil alga Chaetocladus gracilis revisited : new material from the Silurian of Sweden
Johan Pettersson, Per Ahlberg, Anders Lindskog, Johan Lindgren, Mats E. Eriksson
(2020) GFF, 142 p.304-308
Journal articleDarriwili (Keskordoviitsiumi) δ13Corg kemostratigraafia koos graptoliitide biostratigraafiaga klassikalisel röstånga alal skåne maakonna loodeosas lõunarootsis
Stig M. Bergström, Per Ahlberg, Jörg Maletz, Frans Lundberg, Michael M. Joachimski
(2020) Estonian Journal of Earth Sciences, 69 p.121-133
Journal articleThe Furongian (late Cambrian) Biodiversity Gap : Real or apparent?
David A.T. Harper, Timothy P. Topper, Borja Cascales-Miñana, Thomas Servais, Yuan Dong Zhang, et al.
(2019) Palaeoworld, 28 p.4-12
Journal articleFossil insect eyes shed light on trilobite optics and the arthropod pigment screen
Johan Lindgren, Dan Eric Nilsson, Peter Sjövall, Martin Jarenmark, Shosuke Ito, et al.
(2019) Nature, 573 p.122-125
Journal article (letter)Integrated Cambrian biostratigraphy and carbon isotope chemostratigraphy of the Grönhögen-2015 drill core, Öland, Sweden
PER AHLBERG, FRANS LUNDBERG, MIKAEL ERLSTRÖM, MIKAEL CALNER, ANDERS LINDSKOG, et al.
(2019) Geological Magazine, 156 p.935-949
Journal articleThe complexity of mudstone diagenesis–some insight from the Tøyen Shale, Lower to Middle Ordovician, southern Sweden
Sven O. Egenhoff, Neil S. Fishman, Heather A. Lowers, Per Ahlberg
(2019) GFF, 141 p.54-67
Journal articleThe Miaolingian, a new name for the ‘Middle’ Cambrian (Cambrian Series 3) : identification of lower and upper boundaries in Baltoscandia
Arne Thorshøj Nielsen, Per Ahlberg
(2019) GFF, 141 p.162-173
Journal article reviewDarriwilian (Middle Ordovician) chemostratigraphy linked to graptolite, conodont and trilobite biostratigraphy in the Fågelsång-3 drill core, Scania, Sweden
Stig M. Bergström, Per Ahlberg, Jörg Maletz, Frans Lundberg, Michael M. Joachimski
(2018) GFF, 140 p.229-240
Journal articleThe Lower Ordovician Tøyen Shale succession in the Fågelsång-3 drill core, Scania, Sweden
Jörg Maletz, Per Ahlberg
(2018) GFF, 140 p.293-305
Journal articleThe Cambrian–Ordovician succession at Lanna, Sweden : stratigraphy and depositional environments
Anders Lindskog, Anna M. L. Lindskog, Jan V. Johansson, Per Ahlberg, Mats Eriksson
(2018) Estonian Journal of Earth Sciences, 67 p.133-148
Journal articleSedimentology of the Lower Ordovician (upper Tremadocian) Bjørkåsholmen Formation at Flagabro, southern Sweden
Sven Egenhoff, Jörg Maletz, Per Ahlberg, Allison Mast, Åsa M. Frisk, et al.
(2018) GFF, 140 p.55-65
Journal articleEarly post-embryonic development in Ellipsostrenua (Trilobita, Cambrian, Sweden) and the developmental patterns in Ellipsocephaloidea
Lukáš Laibl, Peter Cederström, Per Ahlberg
(2018) Journal of Paleontology, 92 p.1018-1027
Journal articleChallenges in defining the base of Cambrian Series 2 and Stage 3
Xingliang Zhang, Per Ahlberg, Loren E. Babcock, Duck K. Choi, Gerd Geyer, et al.
(2017) Earth-Science Reviews, 172 p.124-139
Journal article (comment)Cambrian trilobite biostratigraphy and its role in developing an integrated history of the Earth system
Loren E. Babcock, Shanchi Peng, Per Ahlberg
(2017) Lethaia, 50 p.381-399
Journal articleUpper Ordovician δ13Corg chemostratigraphy, K-bentonite stratigraphy, and biostratigraphy in southern Scandinavia : A reappraisal
Stig M. Bergström, Mats E. Eriksson, Birger Schmitz, Seth A. Young, Per Ahlberg
(2016) Palaeogeography, Palaeoclimatology, Palaeoecology, 454 p.175-188
Journal articleEdiacaran–Cambrian phosphorites from the western margins of Gondwana and Baltica
J. Javier Álvaro, Graham A. Shields-Zhou, Per Ahlberg, Sören Jensen, Teodoro Palacios
(2016) Sedimentology, 63 p.350-377
Journal articleCambrian stratigraphy of the Tomten-1 drill core, Västergötland, Sweden
Per Ahlberg, Mats E. Eriksson, Frans Lundberg, Anders Lindskog
(2016) GFF, 138 p.490-501
Journal articleObituary Lennart Jeppsson 1940-2015
Stig M. Bergström, Per Ahlberg, Mikael Calner, Mats Eriksson, Birger Schmitz, et al.
(2015) The Palaeontological Association Newsletter, 89 p.103-105
Journal articleThe Cambrian explosion: Its timing and stratigraphic setting
Sebastien Clausen, J. Javier Alvaro, Lea Devaere, Per Ahlberg, Loren E. Babcock
(2015) Annales de Paléontologie, 101 p.153-160
Journal article (comment)Exotic trilobites from the uppermost Cambrian Series 3 and lower Furongian of Sweden
Anna Zylinska, Thomas Weidner, John Ahlgren, Per Ahlberg
(2015) Acta Geologica Polonica, 65 p.21-67
Journal articleGlobal climate, sea level cycles, and biotic events in the Cambrian Period
Loren Babcock, Shan-Chi Peng, Carlton E. Brett, Mao-Yan Zhu, Per Ahlberg, et al.
(2015) Palaeoworld, 24 p.5-15
Journal articleA blind trilobite with Baltic affinities from Cambrian Series 3 of the Iberian Chains, Spain, and its stratigraphical and palaeobiogeographical significance
Juan B. Chirivella Martorell, Eladio Linan, Per Ahlberg, Rodolfo Gozalo
(2015) GFF, 137 p.175-180
Journal articleIntraspecific variation and taphonomic alteration in the Cambrian (Furongian) agnostoid Lotagnostus amerkanus: new information from China
Shanchi Peng, Loren Babcock, Xuejian Zhu, Per Ahlberg, Fredrik Terfelt, et al.
(2015) Bulletin of Geosciences, 90 p.281-306
Journal articleSphenothallus from the Furongian (Cambrian) of Scandinavia
Sarah Elizabeth Stewart, Euan Neilson Kerr Clarkson, John Ahlgren, Per Ahlberg, Brigitte Schoenemann
(2015) GFF, 137 p.20-24
Journal articleMollusk maxima and marine events in the Middle Ordovician of Baltoscandia
Anders Lindskog, Mats Eriksson, Carsten Tell, Fredrik Terfelt, Ellinor Martin, et al.
(2015) Palaeogeography, Palaeoclimatology, Palaeoecology, 440 p.53-65
Journal articleThe ontogeny of Ellipsocephalus (Trilobita) and systematic position of Ellipsocephalidae
Lukas Laibl, Oldrich Fatka, Petr Budil, Per Ahlberg, Michal Szabad, et al.
(2015) Alcheringa, 39 p.477-487
Journal articleSedimentology of SPICE (Steptoean positive carbon isotope excursion): A high-resolution trace fossil and microfabric analysis of the middle to late Cambrian Alum Shale Formation, southern Sweden
Sven O. Egenhoff, Neil S. Fishman, Per Ahlberg, Jörg Maletz, Allison Jackson, et al.
(2015) Geological Society of America. Special Papers, 515 p.87-102
Journal articleIn memoriam : Lennart Jeppsson - banbrytande paleontolog
Per Ahlberg, Stig M. Bergström, Mikael Calner, Mats Eriksson
(2015) Geologiskt Forum , p.25-27
Journal articleHirnantian (latest Ordovician) delta C-13 chemostratigraphy in southern Sweden and globally: a refined integration with the graptolite and conodont zone successions
Stig M. Bergstroem, Mats Eriksson, Seth A. Young, Per Ahlberg, Birger Schmitz
(2014) GFF, 136 p.355-386
Journal articleUpper lower Cambrian (provisional Cambrian Series 2) trilobites from northwestern Gansu Province, China
Jan Bergstrom, Zhou Zhiqiang, Per Ahlberg, Niklas Axheimer
(2014) Estonian Journal of Earth Sciences, 63 p.123-143
Journal articleSilurian graptolite biostratigraphy of the Rostanga-1 drill core, Scania - a standard for southern Scandinavia
Joerg Maletz, Per Ahlberg, Anna Suyarkova, David Kendrick Loydell
(2014) GFF, 136 p.175-178
Journal articleLate Ordovician (Katian) spores in Sweden : oldest land plant remains from Baltica
Ahmed Salah Badawy, Kristina Mehlqvist, Vivi Vajda, Per Ahlberg, Mikael Calner
(2014) GFF, 136 p.16-21
Journal articleProposed reassessment of the Cambrian GSSP
Loren Babcock, Shanchi Peng, Maoyan Zhu, Shuhai Xiao, Per Ahlberg
(2014) Journal of African Earth Sciences, 98 p.3-10
Journal articlePalaeogeographical significance of upper lower Cambrian (provisional Cambrian Series 2) trilobites from Gansu Province, China
Jan Bergström, Zhiqiang Zhou, Per Ahlberg, Niklas Axheimer
(2014) Proceedings of the 4th IGCP 591 Annual Meeting , p.17-17
Conference paper: abstractEvidence of global climatic and sea level cycles in the Cambrian
Loren Babcock, Shanchi Peng, Carlton E. Brett, Maoyan Zhu, Per Ahlberg, et al.
(2014) IGCP 591 Field Workshop 2014, Kunming, China, 12-21 August 2014, Extended Summary , p.9-11
Conference paperGlobal Cambrian trilobite palaeobiogeography assessed using parsimony analysis of endemicity
J. Javier Álvaro, Per Ahlberg, Loren E. Babcock, Osvaldo L. Bordonaro, Duck K. Choi, et al.
(2013) Early Palaeozoic Biogeography and Palaeogeography, Memoir 38 p.273-296
Book chapterA Bradoriid and Brachiopod Dominated Shelly Fauna from the Furongian (Cambrian) of Västergötland, Sweden
Timothy P. Topper, Christian B. Skovsted, David A. T. Harper, Per Ahlberg
(2013) Journal of Paleontology, 87 p.69-83
Journal articleIn memoriam : Jan Bergström : paleozoolog, geolog och folkbildare
Per Ahlberg, Stig M. Bergström
(2013) Geologiskt Forum , p.24-27
Journal articleJan Bergström 1938-2012
Per Ahlberg, Stig M. Bergström
(2013) Kungliga Fysiografiska Sällskapet i Lund Årsbok 2011-2012, 2011-2012 p.113-115
Book chapterGuzhangian (mid Cambrian) trilobites from siliceous concretions of the Valtorres Formation, Iberian Chains, NE Spain
J. Javier Alvaro, Samuel Zamora, Daniel Vizcaino, Per Ahlberg
(2013) Geological Magazine, 150 p.123-142
Journal articleReappraisal of the brachiopod Acrotreta socialis von Seebach, 1865: clarifying 150 years of confusion
Timothy P. Topper, David A. T. Harper, Per Ahlberg
(2013) GFF, 135 p.191-203
Journal articlePalynology and sedimentology of the Upper Ordovician-lowermost Llandovery in the Röstånga-1 core, southern Sweden
Ahmed S. Badawy, Per Ahlberg, Mikael Calner, Kristina Mehlqvist, Vivi Vajda
(2013) [Publication information missing] , p.39-41
Conference paper: abstractPalaeokarst formation in the early Palaeozoic of Baltoscandia : evidence for significant sea-level changes in a shallow epicontinental sea
Oliver Lehnert, Mikael Calner, Per Ahlberg, Jan Ove Ebbestad, David A.T. Harper, et al.
(2013) [Publication information missing] , p.169-171
Conference paper: abstractA complete record of the 'Lower' Cambrian-Middle Ordovician succession of Öland, southern Sweden, based on the Tingskullen core
Peter Dahlqvist, Mikael Calner, Oliver Lehnert, Per Ahlberg
(2013) [Publication information missing] , p.74-76
Conference paper: abstractThe Drumian Isotopic Carbon Excursion (DICE) in Scania, southern Sweden : a mirror of the onset of the Marjumiid Biomere at a time of increased primary production?
Oliver Lehnert, Per Ahlberg, Mikael Calner, Michael M. Joachimski
(2013) [Publication information missing] , p.172-174
Conference paper: abstractObituary Jan Bergström 1938-2012
Stig M. Bergström, Per Ahlberg
(2013) The Palaeontological Association Newsletter , p.60-62
Journal articleThe Lower Palaeozoic of southern Sweden and the Oslo Region, Norway. Field Guide for the 3rd Annual Meeting of the IGCP project 591
(2013) Sveriges geologiska undersökning Rapporter och Meddelanden, 133
BookSilurian graptolite biostratigraphy of the Röstånga-1 drill core, Scania : a standard for southern Scandinavia
Jörg Maletz, Per Ahlberg
(2013) [Publication information missing] , p.198-200
Conference paper: abstractMorphologic variation of Lotagnostus americanus from China and Russia
Shanchi Peng, Loren E. Babcock, Per Ahlberg
(2012) Journal of Guizhou University (Natural Sciences), Acta Scientiarum Naturalium Universitatis Guizhou, 29 (Supplement 1) p.182-183
Conference paper: abstractMorphologic variation, taphonomy and biostratigraphic range of the agnostoid Lotagnostus (Cambrian: Furongian) from Sweden
Loren E. Babcock, Per Ahlberg, Shanchi Peng, Fredrik Terfelt, Mats Eriksson
(2012) Journal of Guizhou University (Natural Sciences), Acta Scientiarum Naturalium Universitatis Guizhou, 29 (supplement 1) p.154-155
Conference paper: abstractFurongian agnostoids of Scandinavia : stratigraphic assessment and intercontinental correlation
Per Ahlberg, Fredrik Terfelt
(2012) Journal of Guizhou University (Natural Sciences), Acta Scientiarum Naturalium Universitatis Guizhou, 29 (Supplement 1) p.153-154
Conference paper: abstractMorphology, ontogeny and distribution of the Cambrian Series 2 ellipsocephalid trilobite Strenuaeva spinosa from Scandinavia
Peter Cederstrom, Per Ahlberg, Loren Babcock, John Ahlgren, Magne Hoyberget, et al.
(2012) GFF, 134 p.157-171
Journal articleFurongian (Cambrian) agnostoids of Scandinavia and their implications for intercontinental correlation
Per Ahlberg, Fredrik Terfelt
(2012) Geological Magazine, 149 p.1001-1012
Journal articleGuide till de västgötska platåbergens geologi
Mikael Calner, Per Ahlberg
(2011) Geologiskt Forum, 70 p.17-28
Journal articleComplete record of Furongian polymerid trilobites and agnostoids of Scandinavia : a biostratigraphical scheme
Fredrik Terfelt, Per Ahlberg, Mats Eriksson
(2011) Lethaia, 44 p.8-14
Journal articleMaurits Lindström 1932-2009
Per Ahlberg, Stig M. Bergström, Birger Schmitz
(2011) Kungliga Fysiografiska Sällskapet i Lund Årsbok 2009-2010, 2009-2010 p.138-140
Book chapterMoulting, ontogeny and sexual dimorphism in the Cambrian ptychopariid trilobite Strenuaeva inflata from the northern Swedish Caledonides
Peter Cederstrom, Per Ahlberg, Carin H. Nilsson, John Ahlgren, Mats Eriksson
(2011) Palaeontology, 54 p.685-703
Journal articleMorphology, ontogeny and distribution of the Cambrian ellipsocephalid trilobite Strenuaeva spinosa from Scandinavia
Peter Cederström, Per Ahlberg, John Ahlgren, Magne Höyberget, Carin H. Nilsson
(2011) GFF, 133 p.59-60
Conference paperThe lower Cambrian ellipsocephalid trilobite Strenuaeva from Scandinavia: Morphology, ontogeny, and distribution
Peter Cederström, Per Ahlberg, John Ahlgren, Magne Höyberget, Carin H. Nilsson, et al.
(2011) Museum of Northern Arizona Bulletin, 67 p.277-278
Conference paper: abstractDarriwilian (Ordovician) graptolite faunas and provincialism in the Töyen Shale of the Krapperup drill core (Scania, southern Sweden)
Jörg Maletz, Per Ahlberg
(2011) Cuadernos del Museo Geominero, 14 p.327-332
Conference paperIntegrated higher education in palaeontology: bridging the academic gap between Denmark and Sweden
David A. T. Harper, Per Ahlberg, Johan Lindgren, Maria Liljeroth, Jan Audun Rasmussen
(2011) European Geologist, 31 p.20-20
Conference paper: abstractThe Lerhamn drill core and its bearing for the graptolite biostratigraphy of the Ordovician Toyen Shale in Scania, southern Sweden
Joerg Maletz, Per Ahlberg
(2011) Lethaia, 44 p.350-368
Journal articlePseudagnostus rugosus Ergaliev, 1980: a key agnostoid species for intercontinental correlation of upper Furongian (Cambrian) strata
Fredrik Terfelt, Per Ahlberg
(2010) Geological Magazine, 147 p.789-796
Journal articleParadoxides brachyrhachis Linnarsson, 1883 versus Paradoxides mediterraneus Pompeckj, 1901: a problematic determination
Maria Eugenia Dies Alvarez, Adrian W. A. Rushton, Rodolfo Gozalo, Gian Luigi Pillola, Eladio Linan, et al.
(2010) GFF, 132 p.95-104
Journal articleA Tiny Eye Indicating A Planktonic Trilobite
Brigitte Schoenemann, Euan N. K. Clarkson, Per Ahlberg, Maria E. D. Alvarez
(2010) Palaeontology, 53 p.695-701
Journal articleSkeletal carbonate productivity and phosphogenesis at the lower-middle Cambrian transition of Scania, southern Sweden
J. Javier Alvaro, Per Ahlberg, Niklas Axheimer
(2010) Geological Magazine, 147 p.59-76
Journal articleThe lower Cambrian eodiscoid trilobite Calodiscus lobatus from Sweden : morphology, ontogeny and distribution
Peter Cederström, Per Ahlberg, Carin H. Nilsson, Euan N.K. Clarkson, Niklas Axheimer
(2009) Palaeontology, 52 p.491-539
Journal article'Mediterranean Province' hyoliths from the middle Cambrian and Upper Ordovician of Sweden
John M. Malinky, Mats Eriksson, Per Ahlberg
(2009) GFF, 131 p.281-291
Journal articleThe lower Cambrian eodiscoid trilobite Calodiscus lobatus: morphology, ontogeny and distribution
Per Ahlberg, Peter Cederström, Euan N.K. Clarkson, Carin H. Nilsson, Niklas Axheimer
(2009) [Publication information missing] , p.14-15
Conference paper: abstractGeologiutbildning vid Lunds universitet - förändring och anpassning
Per Ahlberg
(2009) Proceedings Utvecklingskonferens Lunds universitet 09 , p.21-21
Conference paperCambrian high-resolution biostratigraphy and carbon isotope chemostratigraphy in Scania, Sweden: first record of the SPICE and DICE excursions in Scandinavia
Per Ahlberg, Niklas Axheimer, Loren E. Babcock, Mats Eriksson, Birger Schmitz, et al.
(2009) Lethaia, 42 p.2-16
Journal articleBradoriid arthropods from the lower-middle Cambrian of Scania, Sweden
Maria Eugenia Dies Alvarez, Rodolfo Gozalo, Peter Cederstrom, Per Ahlberg
(2008) Acta Palaeontologica Polonica, 53 p.647-656
Journal articleFossilt bajs berättar om rovdjur
Mats Eriksson, Fredrik Terfelt, Per Ahlberg
(2008) Forskning & framsteg, 2008 p.54-55
Journal articleFurongian Series (Cambrian) biostratigraphy of Scandinavia - a revision
Fredrik Terfelt, Mats Eriksson, Per Ahlberg, Loren E. Babcock
(2008) Norsk Geologisk Tidsskrift, 88 p.73-87
Journal articleA Furongian poymerid planktonic trilobite
Brigitte Schoenemann, Euan N. K. Clarkson, Per Ahlberg, María Eugenia Dies Álvarez
(2008) Cuadernos del Museo Geominero, 9 p.361-364
Conference paperA new lower Cambrian eodiscoid trilobite fauna from Swedish Lapland and its implications for intercontinental correlation
Niklas Axheimer, Per Ahlberg, Peter Cederström
(2007) Geological Magazine, 144 p.953-961
Journal articleTaxonomy of Ptychagnostus atavus: A key trilobite in defining a global Cambrian stage boundary
Per Ahlberg, Niklas Axheimer, Richard A. Robison
(2007) Geobios, 40 p.709-714
Journal articleLower Cambrian eodiscoid trilobites from Scandinavia and their implications for intercontinental correlation
Per Ahlberg, Niklas Axheimer, Peter Cederström
(2007) New York State Museum Bulletin, 510 p.81-81
Conference paper: abstractBivalved athropods (Bradoriida) from the lower-middle Cambrian transition of Scania, southern Sweden
María Eugenia Dies Álvarez, Rodolfo Gozalo, Per Ahlberg, Peter Cederström
(2007) New York State Museum Bulletin, 510 p.83-84
Conference paper: abstractBradoriids (Arthropoda) from the lower-middle Cambrian of Scania, Sweden
María Eugenia Dies Álvarez, Rodolfo Gozalo, Peter Cederström, Per Ahlberg
(2007) [Publication information missing] , p.17-17
Conference paper: abstractBarren intervals in the Alum Shale Formation of Scania: taphonomy, ecology, or both?
Fredrik Terfelt, Mats Eriksson, Per Ahlberg
(2007) [Publication information missing] , p.40-40
Conference paper: abstract500-million-year-old feces reveal ancient food webs
Mats Eriksson, Fredrik Terfelt, Per Ahlberg
(2007) Lundadagarna i historisk geologi och paleontologi, X, Abstracts , p.20-20
Conference paper: abstractThe first record of Odontopleura ovata (Trilobita) from Scandinavia: part of a middle Silurian intercontinental shelly benthos mass occurrence
Mikael Calner, Per Ahlberg, Niklas Axheimer, L Gustavsson
(2006) GFF, 128 p.33-37
Journal articleThe middle Cambrian cosmopolitan key species Lejopyge laevigata and its biozone: new data from Sweden
Niklas Axheimer, Mats Eriksson, Per Ahlberg, Anders Bengtsson
(2006) Geological Magazine, 143 p.447-455
Journal articleFaunal turnovers and trilobite morphologies in the upper Cambrian Leptoplastus Zone at Andrarum, southern Sweden
Per Ahlberg, Kristina Månsson, ENK Clarkson, CM Taylor
(2006) Lethaia, 39 p.97-110
Journal articleHigh-resolution trilobite biostratigraphy and carbon isotope stratigraphy of the middle Cambrian-lower Furongian of Baltica
Per Ahlberg, Niklas Axheimer, Mats Eriksson, Birger Schmitz, Fredrik Terfelt
(2006) Geological Society of Australia, Abstracts, 84 p.5-5
Conference paper: abstract7.1.2 Stratigrafisk indelning
Per Ahlberg, Mikael Calner
(2006) Geobiosfären - en introduktion , p.106-108
Book chapterFrån kusten till djuphavet
Mikael Calner, Per Ahlberg
(2006) Geobiosfären - en introduktion , p.315-322
Book chapter21.6 Kontinentalsockelns berggrund
Per Ahlberg
(2006) Geobiosfären - en introduktion , p.415-416
Book chapterThe middle Cambrian Lejopyge laevigata Biozone: New data from Sweden
Niklas Axheimer, Mats Eriksson, Per Ahlberg, Anders Bengtsson
(2005) Acta Micropalaeontologica Sinica, 22 p.6-7
Conference paper: abstractPhosphatised olenid triobites and associated faunal elements from the Furongian (upper Cambrian) of Sweden
Per Ahlberg, Szaniawski Hubert, Clarkson Euan N.K., Bengtson Stefan
(2005) Acta Micropalaeontologica Sinica, 22 p.1-2
Conference paper: abstractThe middle Cambrian Lejopyge laevigata Zone in Sweden
Niklas Axheimer, Mats Eriksson, Per Ahlberg, Anders Bengtsson
(2005) GFF, 127 p.44-44
Conference paper: abstractPhosphatised olenid trilobites and associated fauna from the Upper Cambrian of Vastergotland, Sweden
Per Ahlberg, H Szaniawski, ENK Clarkson, S Bengtson
(2005) Acta Palaeontologica Polonica, 50 p.429-440
Journal articleMorphology, ontogeny, and enrollment of the Lower Cambrian eodiscoid trilobite Calodiscus lobatus from Sweden
Peter Cederström, Per Ahlberg, Euan N.K. Clarkson
(2005) GFF, 127 p.46-46
Conference paper: abstractPhosphatised olenid trilobites and associated faunal elements from the Furongian (Upper Cambrian) of Västergötland, Sweden
Per Ahlberg, Hubert Szaniawski, Euan N.K. Clarkson, Stefan Bengtson
(2005) GFF, 127 p.44-44
Conference paper: abstractFurongian (upper Cambrian) biostratigraphy and trilobites of the Haslov-1 drill core, Scania, S. Sweden
Fredrik Terfelt, Per Ahlberg, Mats Eriksson, ENK Clarkson
(2005) GFF, 127 p.195-203
Journal articleA phosphatocopid fauna from the upper Cambrian of Andrarum, southern Sweden
Fredrik Terfelt, Mats Eriksson, Per Ahlberg
(2004) GFF, 126 p.110-110
Conference paper: abstractAgnostoids and intercontinental tie points in the middle and upper Cambrian of Scandinavia
Per Ahlberg, Niklas Axheimer, Mats Eriksson, Fredrik Terfelt
(2004) GFF, 126 p.108-108
Conference paper: abstractThe middle Cambrian Ptychagnostus punctuosus and Goniagnostus nathorsti zones in Vastergotland, Sweden
TR Weidner, Per Ahlberg, Niklas Axheimer, ENK Clarkson
(2004) Bulletin of the Geological Society of Denmark, 51 p.39-45
Journal articleFurongian (Upper Cambrian) biostratigraphy and trilobites of the Håslöv-1 drill core, Scania, southern Sweden
Fredrik Terfelt, Per Ahlberg, Euan N.K. Clarkson, Mats Eriksson
(2004) [Publication information missing] , p.28-28
Conference paper: abstractGuide to some classical Ordovician and Cambrian localities in the Fågelsång area, Scania, southern Sweden
Stig M. Bergström, Per Ahlberg
(2004) Erlanger Geologischen Abhandlungen, 5 p.81-90
Conference paperMiddle and Upper Cambrian agnostoids of Scandinavia - intercontinental correlation tools
Per Ahlberg, Niklas Axheimer, Mats Eriksson, Fredrik Terfelt
(2004) [Publication information missing] , p.33-33
Conference paper: abstractTrilobites and intercontinental tie points in the Upper Cambrian of Scandinavia
Per Ahlberg
(2003) Geologica Acta, 1 p.127-134
Journal articleThe post-persculptus and pre-ascensus graptolite fauna in Scania, south-western Sweden: Ordovician or Silurian?
Tatyana N. Koren´, Per Ahlberg, Arne T. Nielsen
(2003) Instituto Superior de Correlación Geológica (INSUGEO), Serie Correlación Geológica, 18 p.133-138
Conference paperTvå gyllene spikar till Sverige - Globala referensprofiler utvalda i Sveriges ordovicium
Stig M. Bergström, Kent Larsson, Mats Eriksson, Per Ahlberg
(2003) Geologiskt Forum , p.32-37
Journal articleRedescription of Holmia inusitata (Trilobita) from the Lower Cambrian of Scandinavia
JOR Ebbestad, Per Ahlberg, M Hoyberget
(2003) Palaeontology, 46 p.1039-1054
Journal articleA core drilling through Cambrian strata at Almbacken, Scania, S. Sweden: trilobites and stratigraphical assessment
Niklas Axheimer, Per Ahlberg
(2003) GFF, 125 p.139-156
Journal articlePhosphatised olenid trilobites from the upper Cambrian of Västergötland, Sweden
Per Ahlberg, Hubert Szaniawski, Euan N.K. Clarkson
(2003) GFF, 125 p.102-102
Conference paper: abstractBradoriids and phosphatocopids from the upper Cambrian of Andrarum, Scania, Sweden
Fredrik Terfelt, Mats Eriksson, Per Ahlberg, Niklas Axheimer, Euan N.K. Clarkson
(2003) GFF, 125 p.110-110
Conference paper: abstractThe Almelund Shale, a replacement name for the Upper Didymograptus Shale and the Lower Dicellograptus Shale in the lithostratigraphical classification of the Ordovician succession in Scania, Southern Sweden
SM Bergstrom, Kent Larsson, Christian Pålsson, Per Ahlberg
(2002) Bulletin of the Geological Society of Denmark, 49 p.41-47
Journal articleOntogeny and structure of a new, miniaturised and spiny olenid trilobite from Southern Sweden
ENK Clarkson, Per Ahlberg
(2002) Palaeontology, 45 p.1-22
Journal articleLower Palaeozoic stratigraphy at Lyby and Tängelsås, sentral Scania, southern Sweden
Mikael Erlström, Per Ahlberg, Anita Löfgren
(2001) GFF, 123 p.7-14
Journal articleLotagnostus? : mystacinus, a rare agnostid from the Upper Cambrian of Sweden
Per Ahlberg, John Ahlgren
(2000) Acta Palaeontologica Polonica, 45 p.91-96
Journal articleGeological fieldwork in the Kirwanveggen area
Per Ahlberg, Göran Bylund, Kent Larsson
(1992) Swedish Antarctic research programme : a cruise report. 1991/92, Dronning Maud Land, Livingston Island, South Georgia , p.13-21
Book chapter