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Pterochiton spatulatus
Taxonomy
Pterochiton spatulatus was named by Hoare et al. (1972) [size estimate of whole animal]. Its type specimen is OSU 27144, a valve, and it is not a trace fossil.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1972 | Pterochiton spatulatus Hoare et al. pp. 676 – 679 figs. pl. 3 f. 1-14 |
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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.
†Pterochiton spatulatus Hoare et al. 1972
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. D. Hoare et al. 1972 | Head valve short relative to width, broadly rounded anteriorly, lateral and anterior slopes uniform and apex present but not pronounced. Intermediate valves distinctly wider than long, jugal sinus a continuation of form of the anterior margin, jugum not strongly set off from jugal areas, apex distinct and lateral slopes gently concave. Tail valve with short keel terminating in a raised mucro just anterior to mid-length, anterior margin flatly convex and posterior margin strongly rounded to subtrapezoidal in shape. Surface ornamentation of very fine granules arranged in quincunx and strongly developed lines of growth near valve margins. Sutural laminae wide and broadly rounded. Girdle unknown.
No complete association of plates is known. A reconstruction gives approximate length and width of 18.5 mm and 5.0 mm respectively. Measurements of individual plates are given in Table 1. |