Cymatoceras honmai Matsumoto and Miyauchi 1983 (nautiloid)

Cephalopoda - Nautilida - Nautilidae

Full reference: T. Matsumoto and T. Miyauchi. 1983. Cretaceous Nautiloids from Hokkaido-III Part 3. Some Nautiloids from the Campanian of Soya, Northern Hokkaido. Transactions and Proceedings of the Paleontological Society of Japan, N.S. 132:220-229

Belongs to Cymatoceras according to M. Wilmsen and E. A. Yazykova 2003

See also Matsumoto and Miyauchi 1983

Sister taxa: Cymatoceras albense, Cymatoceras atlas, Cymatoceras bayfieldi, Cymatoceras bifidum, Cymatoceras bifurcatum, Cymatoceras carlottense, Cymatoceras cenomanense, Cymatoceras colombiana, Cymatoceras columbinum, Cymatoceras crebricostatum, Cymatoceras deslongchampsianum, Cymatoceras eichwaldi, Cymatoceras elegans, Cymatoceras hendersoni, Cymatoceras hilli, Cymatoceras hunstantonensis, Cymatoceras huxleyanum, Cymatoceras karakaschi, Cymatoceras kayeanum, Cymatoceras kossmati, Cymatoceras loricatum, Cymatoceras ludevigi, Cymatoceras manuanensis, Cymatoceras mikado, Cymatoceras neckerianum, Cymatoceras negama, Cymatoceras neocomiense, Cymatoceras pacificum, Cymatoceras paralibanoticum, Cymatoceras patagonicum, Cymatoceras patens, Cymatoceras perstriatum, Cymatoceras picteti, Cymatoceras pseudoatlas, Cymatoceras pseudoelegans, Cymatoceras pseudonegama, Cymatoceras pseudoneokomiense, Cymatoceras pulchrum, Cymatoceras radiatum, Cymatoceras renngarteni, Cymatoceras sakalavum, Cymatoceras sarysuense, Cymatoceras savelievi, Cymatoceras semilobatum, Cymatoceras sharpei, Cymatoceras tenuicostatum, Cymatoceras tourtiae, Cymatoceras tskaltsithelense, Cymatoceras tsukushiense, Cymatoceras virgatum, Cymatoceras yabei, Nautilus (Cymatoceras) formosus, Nautilus (Cymatoceras) saussureanus

Type specimen: MNH 144, a shell. Its type locality is Location 2, Kiyohama-I, Cape Soya, which is in a Campanian marine sandstone in Japan.

Ecology: nektonic carnivore

Average measurements (in mm): shell diameter 51.2

Distribution:

• Cretaceous of Japan (2 collections), the Russian Federation (1)

Total: 3 collections each including a single occurrence

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