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Natemys peruvianus
Taxonomy
Natemys peruvianus was named by Wood et al. (1996). Its type specimen is Museo de Historia Natural de Lima, uncatalogued, a partial shell (partial carapace and plastron), and it is a 3D body fossil. Its type locality is near Las Tres Pyramides, which is in an Oligocene marine horizon in the Pisco Formation of Peru. It is the type species of Natemys.
Synonymy list
| Year | Name and author |
|---|---|
| 1996 | Natemys peruvianus Wood et al. p. 271 |
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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.
†Natemys peruvianus Wood et al. 1996
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. C. Wood et al. 1996 | Differs from all other known decrmochelyid taxa in having both carapace and plastron comprised of a mosaic of large numbers of bony ossicles varying considerably in size and shape. Anteroposterior ridges are absent on both carapace and plastron, both of which appear to have been smooth-surfaced. Scute sulci are absent. Carapace has at least two parallel rows of irregularly spaced, greatly enlarged and elongated ossicles with deeply scalloped borders, largely ringed by clusters of smaller, more or less oval ossicles; together, this assemblage forms a distinctive "sunflower" pattern. Clusters of ossicles forming "sunflower" patterns in adjacent rows are offset from one another. A third row of moderately elongated, uniformly sized ossicles is also present on the carapace; no readily definable clusters of smaller ossicles are associated with these. All the rows of enlarged ossicles are presumably aligned with the anteroposterior axis of the shell. Three to five generally smaller ossicles intervene between the parallel rows of enlarged ossicles. Only one row of enlarged, roughly equidimensional ossicles is preserved on the plastron, oriented in the same direction as the prominent carapace rows. In this row, larger ossicles with scalIoped edges alternate regularly with somewhat smaller, oblong ossicles with straight sides. A feebly developed "sunflower" pattern is associated with only some of the scallop-edged ossiccles of this row. No well-defined lateral rows of enlarged ossicles are present on either side of this row. Many plastral ossicles are elongated transversely, including one isolated, enlarged, scallop-edged ossicle surrounded by smaller satellite ossicles which form a "sunflower" pattern. |
Measurements
No measurements are available
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| Source: f = family, c = class, subp = subphylum | |||||
| References: Carroll 1988, Uetz 2005, Hendy et al. 2009 | |||||
Age range: Late/Upper Oligocene or 28.40000 to 23.03000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Oligocene | Peru (Ica) | Natemys peruvianus (type locality: 189536) |