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| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Cornuella
Taxonomy
Cornuella was named by Stinchcomb (1986) [Sepkoski's age data: Cm Trep Sepkoski's reference number: 644].
It was assigned to Hypseloconidae by Stinchcomb (1986); and to Cyrtonellida by Sepkoski (2002).
It was assigned to Hypseloconidae by Stinchcomb (1986); and to Cyrtonellida by Sepkoski (2002).
Synonymy list
| Year | Name and author |
|---|---|
| 1986 | Cornuella Stinchcomb p. 621 |
| 2002 | Cornuella Sepkoski |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| B. L. Stinchcomb 1986 | High cornucopia-shaped diminutive monoplacophoran with apex projecting over anterior apertural margin and terminating in a sharp point. Shell strongly elliptical in cross section. Muscle scars unknown, shell ornamentation consists of evenly spaced radial lines, showing distinct boundaries, that are strongly arched toward presumed anterior part of the shell. Anterior of shell more strongly curved than posterior, producing curvature toward shell apex; shell material unknown. |
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| Reference: Hendy et al. 2009 | |||||
Age range: Trempealeauan or 490.20000 to 486.85000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Trempealeauan | USA (Missouri) | C. parva (8693) |