Lotagnostus? : mystacinus, a rare agnostid from the Upper Cambrian of Sweden
- Lithosphere and Biosphere Science
Publishing year: 2000
Publication/Series: Acta Palaeontologica Polonica
Document type: Journal article
Publisher: Instytut Paleobiologii PAN
Agnostids afford the best means of correlating Cambrian strata, and they are widely used for intercontinental correlations. They are most common in open-marine deposits and reached a maximum diversity during the Middle and early Late Cambrian. About twenty species of agnostids are known from the Upper Cambrian of Scandinavia. Lotagnostus? mystacinus Tjernvik, 1953 is a rare agnostid from the Upper Cambrian Agnostus pisiformis Zone of south-central Sweden. It is redescribed following examination of the holotype and an additional pygidium. The outline and morphology of especially the pygidial posteroaxis, which is distinctly trilobate by a pair of deep notular furrows, suggest that the species is best classified as a species of Lotagnostus. If correctly assigned to Lotagnostus, it would be the oldest known species of that genus.
- ISSN: 0567-7920