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Ptycholepis marshii
Taxonomy
Ptycholepis marshi was named by Newberry (1878). It is a 3D body fossil. Its type locality is Durham fish locality (main), Totoket Mountain, which is in a Hettangian lacustrine - small siltstone in the Shuttle Meadow Formation of Connecticut.
It was corrected as Ptycholepis marshii by Hay (1902) and Schaeffer et al. (1975).
It was corrected as Ptycholepis marshii by Hay (1902) and Schaeffer et al. (1975).
Synonymy list
| Year | Name and author |
|---|---|
| 1878 | Ptycholepis marshi Newberry |
| 1902 | Ptycholepis marshii Hay p. 378 |
| 1975 | Ptycholepis marshii Schaeffer et al. p. 207 |
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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.
†Ptycholepis marshii Newberry 1878
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| B. Schaeffer et al. 1975 | Differs from other species of Ptycholepis in having combined maximum width of parietals nearly equal to length and in having posterolateral corners of parietals extended posteriorly. Maxilla expanded postorbitally as in P. barboi; median gular extending to posterior border of mandible, lateral gulars mostly covered by median gular; six branchiostegals; dermal bone ornamentation weak to strong; origin of dorsal fin at fourteenth scale row; gradual change from rhomboidal to narrow flank scales in first five vertical scale rows. |