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Miocallicebus villaviejai
Discussion
Etymology: Villavieja is the name of the village where the ttpe specimen was discovered.
Taxonomy
Miocallicebus villaviejai was named by Takai et al. (2001). Its type specimen is IGM-KU 97001, a maxilla (right maxillary fragment preserving the anterior base of the pterigoid process and a partial root of upper M1, complete M2 and poorly preserved M3), and it is a 3D body fossil. Its type locality is Duke Bolivia Site, La Venta, which is in a Laventan terrestrial mudstone in the La Victoria Formation of Colombia. It is the type species of Miocallicebus.
Synonymy list
| Year | Name and author |
|---|---|
| 2001 | Miocallicebus villaviejai Takai 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.
†Miocallicebus villaviejai Takai et al. 2001
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. Takai et al. 2001 | Medium size primate with three molars. Upper molars are very low crowned, and M2 is square in occlusal outline with a distinct hypocone. A paracone and metacone are situated very buccally, and protocone and metacone are connected by the postprotocrista-metaloph. Upper M3 is rather obliquely oriented to the tooth row. Upper molar decrease in size from M1>M2>>M3. Differs from all extant and extinct callitrichines in the combination of having three molars and a well-developed hypocone on M2. Differs from atelines in having a nearly squared occlusal M2 outline, a distinct lingual cingulum on M2, and no deep lingual groove on M2. DIffers from Saimiri and Neosaimiri in having a squared-outline M2 with a large hypocone. DIffers from aotines in having lingual cingulum and in lacking deep lingual groove on M2. DIffers from pitheciines in having a distinct crista obliqua, a small but distinct lingual cingulum, no enamel crenulation, and a "not-evenly worn" wear pattern on M2. Differs from extant Callicebus in its much larger size and in having a pterygoid process more medially situated. Differs from Branisella in having a square outline M2 with a well-developed hypocone. Differs from all early-middle MIocene platyrrhines from Patagonia and Chile, such as Dolichocebus, Soriacebus, Carlocebus, in having s more squared outlined M2 with a buccally situated paracone and metacone. Differs from Antillothrix in having a more rectangular occlusal outline and a less developed lingual cingulum on M2. Differs from Paralouatta in having a protocone more lingually situated and a less developed lingual cingulum on M2, and in having a more medially pterygoid process |
Measurements
No measurements are available
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| Source: o = order, subc = subclass, subp = subphylum, p = phylum | |||||
| References: Lillegraven 1979, Ji et al. 2002, Kiessling 2004, Nowak 1999, Carroll 1988 | |||||