Quitmaniceras
| Quitmaniceras Temporal range: Late Cretaceous (early Turonian) | |
|---|---|
| Scientific classification | |
| Class: | Cephalopoda |
| Subclass: | Ammonoidea |
| Order: | Ammonitida |
| Superfamily: | Acanthoceratoidea |
| Family: | Acanthoceratidae |
| Subfamily: | Acanthoceratinae |
| Genus: | Quitmaniceras Powell, 1963 |
Quitmaniceras is a small, compressed, fairly evolute ammonite from the lower Turonian of Grant County, New Mexico and Trans-Pecos Texas, included in the subfamily Acanthoceratinae. The shell has a carinate venter in juveniles and one that is arched in adults, usually with a raised siphonal line,(siphonal referring to the marginal siphuncle). Ribs are very weak to moderately strong, flexious, typically sloping forward toward the rim, bending further forward at the outer shoulder.
References
- W.A. Cobban, S.C. Hook & W.J.Kennedy, 1989. Upper Cretaceous rocks and ammonite faunas of southwestern New Mexico, Memoir 45, New Mexico Bureau of Mines & Mineral Resources
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