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Rionegrochelys caldieroi
Taxonomy
Rionegrochelys caldieroi was named by De la Fuente et al. (2017). Its type specimen is MPCA-AT 258, a shell (carapace and plastron), and it is a 3D body fossil. Its type locality is El Anfiteatro, Parrita site [MPCA], which is in a Coniacian/Santonian crevasse splay mudstone in the Plottier Formation of Argentina. It is the type species of Rionegrochelys.
Synonymy list
| Year | Name and author |
|---|---|
| 2017 | Rionegrochelys caldieroi De la Fuente et al. |
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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.
†Rionegrochelys caldieroi De la Fuente et al. 2017
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. S. De la Fuente et al. 2017 | It differs from other panchelids by the following unique combination of characters: the first vertebral scute is twice as wide as long and subrectangular in shape, a prominent and discontinuous mid-carapace crest, a strong nuchal notch, peripheral bones 2–11 with strongly gutter ends, posterior margin of the vertebral 5 in the carapace is three lobe shaped, the plastron longer than the carapace, an anteriorly wide thoracic vertebra 1 that is tapered posteriorly in ventral view, in its heart-shaped carapace, and in its wide and short cuneiform mesoplastra crossed by a humeropectoral sulcus. |
Measurements
No measurements are available
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| Source: f = family, c = class, subp = subphylum | |||||
| References: Carroll 1988, Hendy et al. 2009, Ernst and Barbour 1989 | |||||
Age range: base of the Late/Upper Coniacian to the top of the Early/Lower Santonian or 89.80000 to 83.60000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Coniacian - Early/Lower Santonian | Argentina (Río Negro) | Chelidae indet. (type locality: 88181) |