Gess, R.W.; Coates, M.I.; Rubidge, B.S.
range · taxonomy · topology · morphology · paleogeography · biogeography · ecology
The event is restricted to the holotype anatomy and Famennian occurrence; lifecycle and feeding behaviour are not directly preserved.
The 4.2 cm Priscomyzon riniensis holotype AM5750 from the Famennian Witpoort Formation at Waterloo Farm, approximately 360 Ma, preserves a large oral disc, fourteen circumoral teeth and a branchial basket; it is total-group lamprey evidence and does not directly establish a crown-Petromyzontida FAD, parasitic feeding, migration or an ammocoete lifecycle.
claim:event:famennian-priscomyzon-oral-discThe 4.2 cm Priscomyzon riniensis holotype AM5750 is interpreted as a total-group lamprey; the profile does not promote it to crown Petromyzontida or a direct ancestor.
claim:taxon:priscomyzon:taxonomyAM5750 comes from the Famennian Witpoort Formation at Waterloo Farm in the Eastern Cape of South Africa; this is one sampled locality, not a global distribution.
claim:taxon:priscomyzon:biogeographyThe specimen documents an aquatic elongate body and oral apparatus, but diet, parasitism, migration, larval ecology and measured swimming performance remain unavailable.
claim:taxon:priscomyzon:ecologyAM5750 preserves a large oral disc, fourteen circumoral teeth and a branchial basket in a 4.2 cm body.
claim:taxon:priscomyzon:morphologyThe displayed 360–359 Ma interval is a rounded envelope for the Waterloo Farm holotype occurrence and is not a global species range or crown-lamprey first appearance.
claim:taxon:priscomyzon:fossil-rangeThe Cyclostome fossil evidence route navigation entity is source-linked only to the named specimen, dataset and analysis dossiers already cited by its range ledger. Its displayed span is a study-bounded route or sample envelope, not a biological taxon, ancestor sequence, global FAD/LAD or exact origin interval.
claim:taxon:cyclostome-fossil-evidence-route