Limusoceras japonicum gen. et comb. nov. (Yabe, 1904) from the Upper Cretaceous Nanaimo Group, Vancouver Island. A–C, RBCM.EH2014.049.0025, Trent River Formation, Hamm Road/Highway 19 roadcut, extrapolated earliest two helical volutions with grey silhouettes illustrating schematized morphology of initial gyroconic stage, lateral and umbilical views, and left septal hemisuture at Wh = 7 mm. D–G, CDM 162, Trent River Formation, Trent River, two and one-half helical volutions with retroversal section, apertural, right lateral, umbilical and left lateral views. Scale bar = 1 cm.
Artist’s rendition of hypothetical life orientations of species of Limusoceras gen. nov. A, Limusoceras traski gen. et sp. nov. B, Limusoceras japonicum gen. et comb. nov. (Yabe, 1904). C, Limusoceras neojaponicum gen. et sp. nov. Artistic renditions by Connie Resch.
Great to see finally published by Misha Whittingham @deathandtaxa.bsky.social the magnum opus on the heteromorph ammonites of the Vancouver Island! With new genera and species.
🧪 ⚒️ #Geology #Paleobio #EvoBio
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