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Placopterina
Taxonomy
Placopterina was named by Hoare et al. (1978) [Sepkoski's age data: C Mosc-l Sepkoski's reference number: 105].
It was assigned to Pterineidae by Hoare et al. (1978); and to Pterioida by Sepkoski (2002).
It was assigned to Pterineidae by Hoare et al. (1978); and to Pterioida by Sepkoski (2002).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1978 | Placopterina Hoare et al. pp. 1024 - 1025 |
| 2002 | Placopterina 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 | |
|---|---|---|
| R. D. Hoare et al. 1978 | Small nearly equivalved moderately inequilateral pterinid with prosocline valves bearing only concentric growth lines.
Description.-Small pteroid shells with small anterior and large posterior auricular areas which are not produced. Hinge line straight. Ligament apparently opisthodetic. No radial ornamentation. |