Bellerophontida
Classification
Phylum: Mollusca
Class: Gastropoda
Order: Bellerophontida (Ulrich & Scofield, 1897)
Cincinnatian Families: Bellerophontidae, Sinuitidae
Geologic Range
Early Cambrian – Early Triassic
Common Paleoecology
Bellerophontida is an extinct order of slow-moving low-level epifaunal detritivores.
Characteristics of the Order
- Closely coiled and rarely slightly asymmetrical
- Usually contain selenizone generated by median labral sinus or slit
- Variable shell wall thickness
[accordions title=”” disabled=”false” active=”1″ autoheight=”false” collapsible=”true”] [accordion title=”Published Descriptions”]
Treatise on Invertebrate Paleontology, Part I, Mollusca 1 (1960):
Treatise on Invertebrate Paleontology, Part I, Mollusca 1 (1960):
- Shell most commonly isostrophic, rarely slightly asymmetrical; mostly closely coiled, but in some genera cyrtiform; predominantly with median labral sinus or slit, or tremata, probably exhalant in function and usually generating a selenizone; shell wall of variable thickness, no evidence of nacre; operculum unknown; presence of paired and equal ctenidia and osphradia, also of single pair of retractor muscles, inferred (latter from muscle scars); nothing known of other soft parts.
[/accordion] [/accordions]
Bellerophontidae
Sinuitidae
