Kingdom Animalia Class Cephalopoaa Family Trocholitidae | Phylum Mollusca Order Tarphycerida Rank Genus | |
Similar Nautilida, Nautiloid, Orthoceras | ||
Hardmanoceras is a Tarphycerid genus belonging to the Trochilidae from the upper Lower Ordovician to possibly the lower Middle Ordovician, found in Western Australia. Hardmanoceras is like Discoceras but prominently ribbed and with a depressed whorl section. The body, or living, chamber is long, 1 1/8 volutions long. The ultimate portion is slightly divergent, not an uncommon characteristic of tarphycerids.
Harmanoceras was named by Teichert and Glenister in 1952. The type us Hardmanoceras lobatum.
References
Hardmanoceras Wikipedia(Text) CC BY-SA