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Psephoderma
Taxonomy
Psephoderma was named by von Meyer (1858) [Sepkoski's age data: Tr Nori Tr Rhae Sepkoski's reference number: 2,940]. It is not extant. It is the type genus of Psephodermatidae.
It was assigned to Psephodermatidae by Kuhn (1971); to Cyamodontidae by Carroll (1988), Pinna and Nosotti (1989); to Cyamodontoidea by Rieppel and Hagdorn (1999); to Placochelyidae by Rieppel (2000); to Placochelyida by Rieppel (2001); and to Placodontia by Sepkoski (2002).
It was assigned to Psephodermatidae by Kuhn (1971); to Cyamodontidae by Carroll (1988), Pinna and Nosotti (1989); to Cyamodontoidea by Rieppel and Hagdorn (1999); to Placochelyidae by Rieppel (2000); to Placochelyida by Rieppel (2001); and to Placodontia by Sepkoski (2002).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1858 | Psephoderma von Meyer |
| 1971 | Psephoderma Kuhn p. 21 |
| 1976 | Placochelyanus Pinna pp. 10, 13 |
| 1988 | Psephoderma Carroll |
| 1989 | Psephoderma Pinna and Nosotti |
| 1999 | Psephoderma Rieppel and Hagdorn p. 381 |
| 2000 | Psephoderma Rieppel |
| 2001 | Psephoderma Rieppel pp. 63-68, 85-86 |
| 2002 | Placochelyanus Sepkoski |
| 2002 | Psephoderma 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.
G. †Psephoderma von Meyer 1858
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†Psephoderma alpinum Meyer 1858
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Invalid names: Placochelys malanchinii Boni 1948 [synonym], Placochelys stoppanii Pinna 1980 [synonym], Placodus zitteli Amman 1878 [synonym]
†Psephoderma anglicum Meyer 1864
†Psephoderma sculptata Rieppel 2002
Invalid names: Placochelyanus Pinna 1976 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| O. Rieppel 2001 | Squamosal projecting far posteriorly; upper temporal fossa relatively narrow; posterior (nasal) process of premaxilla enlarged and extending backward to reach the frontal, thereby separating the nasals from one another (convergent in Macroplacus); frontal narrowly entering the anterior margin of the pineal foramen; pineal foramen located in front of a distinct step in the skull roof; postfrontal small; the posterior palatine tooth plates elongate in adult (convergent in Macroplacus, and, to a lesser degree, in Cyamodus hildegardis). |
Measurements
No measurements are available
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| Source: subo = suborder, c = class, subp = subphylum | |||||
| References: Bush and Bambach 2015, Carroll 1988, Hendy et al. 2009 | |||||
Collections (9 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Illyrian | Israel | P. sp. (149344) | |
| Illyrian - Fassanian | Israel (Negev) | P. sculptata (196711) | |
| Alaunian | Italy (Lombardia) | P. alpinum (36377) | |
| Rhaetian | United Kingdom (England) | P. anglicum (122363) | |
| Rhaetian | Austria | P. alpinum (195671) | |
| Rhaetian | Italy (Lombardy) | Placochelys stoppanii (38121) | |
| Rhaetian | Germany (Vienna) | P. alpinum, Placochelys stoppanii (189823) | |
| Rhaetian | Italy (Lombardia) | P. alpinum (37321 37322) |