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Discussion
Holotype: IGM 184332, a lower jaw with dp2-4, m1-2, p2-4 crowns fully developed but in crypt, m3 partiallly erupted and roots of di1-2 and dc1. Etymology: Named for the Magdalena river, which is near the localities where the specimens were collected.
Taxonomy
Patasola magdalenae was named by Kay and Meldrum (1997). Its type specimen is IGM 184332, a mandible (a lower jaw with dp2-4, m1-2, p2-4 crowns fully developed but in crypt,), and it is a 3D body fossil. Its type locality is Duke Locality 40, which is in a Laventan terrestrial horizon in the La Victoria Formation of Colombia. It is the type species of Patasola.
Synonymy list
| Year | Name and author |
|---|---|
| 1997 | Patasola magdalenae Kay and Meldrum |
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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.
†Patasola magdalenae Kay and Meldrum 1997
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. F. Kay and D. J. Meldrum 1997 | Patasola is a small platyrrhine, smaller than Saimiri or Neosaimiri spp. dentally about the size of Leontophithecicus rosalia- this small size is a synapomorphy with Callitrichids.Other synapomorphies shared by Patasola and some or all callithichids include, in the deciduous dentition, procumbent incisor roots with a mesodistally compressed di2 root, premolar trigonid basins steeply sloping mesiolingually, absence of a metaconid on dp2-3, and buccolingual compression of the deciduois premolar row. The premanent m1-2 protoconids are much tallet than the metaconids in callitrichines. Patasola differs from, and is more primitive than, living callithichines by having third molars, that although small, are not as reduced as in callimico, the only living callitrichid with three molars.
Differences from Neosaimiri annectens, Neosaimiri fieldsi and Saimiri include the following: the p3 of Patasola is buccolingually narrower, and p3-4 have smaller metaconids and more sloping trigonids. The molars are significantly more buccolingually compressed, and the protoconid is taller than the metaconid as compared with Saimiri or Neosaimiri. Patasola, like N. annectens, lacks bucal cingula on the p3-4, whereas a strong but broken buccal cingulum is present in N. fieldsi. In Patasola and N. annectens the m1 hypoconulids are more distinct than in N. fieldsi and the m1 cristid obliqua reaches only part way up the distal wall of the trigonid, not to the protoconid as in Neosaimiri fieldsi. Ptasola and N. fieldsi lower molars lacks posterointernal basins, whereas they are commonly present in N. annectens. |
Measurements
No measurements are available
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| Source: s = species, subc = subclass, c = class, subp = subphylum | |||||
| References: Hendy et al. 2009, Kay and Meldrum 1997, Carroll 1988, Nowak 1991, Lillegraven 1979 | |||||