Polycotylus

Polycotylus is represented by gravid specimen LACM 129639 from the Late Cretaceous Pierre Shale at approximately 78 Ma; it is a local specimen boundary, not a genus-wide first or last appearance. This navigation entry is not a phylogeny or a complete taxon dossier.

Represented range83.6–72.1 Ma

Content packagemarine-reptiles-pterosaurs

PBDBtxn:36506

Evidence boundary

Automated checks cover structure, identifiers, translations and links only; maintainer and external expert review are not complete.

Claim ledger

fossil-range · high

Polycotylus is represented by gravid specimen LACM 129639 from the Late Cretaceous Pierre Shale at approximately 78 Ma; it is a local specimen boundary, not a genus-wide first or last appearance.

claim:taxon:polycotylus

Known limits

A missing branch or fossil occurrence does not imply biological absence. Internal nodes are not calibrated divergence estimates.

References

Viviparity and K-selected life history in a Mesozoic marine plesiosaur (Reptilia, Sauropterygia)O'Keefe, F.R.; Chiappe, L.M. · 2011 · DOI 10.1126/science.1205689
Open Tree of Life web servicesOpenTreeOfLife Project
The Paleobiology Database application programming interfacePeters, S.E.; McClennen, M. · 2016 · DOI 10.1017/pab.2015.39
Denormalized occurrence and taxon tables of the Paleobiology DatabaseThe Paleobiology Database Community; Kocsis, Á.T. · 2026 · DOI 10.5281/zenodo.21620933

Report an evidence issue ↗