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Amphechinus taatsiingolensis
Taxonomy
Amphechinus taatsiingolensis was named by Ziegler et al. (2007). Its type specimen is NHMW 2005z0152/0001, a mandible (sin. with p4-m3), and it is not a trace fossil. Its type locality is Taatsiin Gol West, Valley of Lakes, Central Mongolia, section TGW-A, which is in an Oligocene dry floodplain sandstone/mudstone in the Loh Formation of Mongolia.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 2007 | Amphechinus taatsiingolensis Ziegler et al. p. 96 figs. Fig. 11/1 |
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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.
†Amphechinus taatsiingolensis Ziegler et al. 2007
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. Ziegler et al. 2007 | Small species of Amphechinus characterized by the coexistence of the following traits: small size, dental tooth formula 2-1-2-3, p2 and most of the m3 single-rooted, but with elongated alveoli, which may be slightly separated by a lingual or buccal vestigial septum, respectively; m3 without talonid, but with a residual postcingulid; unworn M1 and M2 may have a small metaconule indicated as protuberance on the disto-buccal termination of the postprotocrista. This species is distinctly smaller than all European, North American and African species, assigned to Amphechinus. |
Measurements
No measurements are available
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| Source: f = family, subc = subclass, c = class, subp = subphylum | |||||
| References: Nowak 1991, Ji et al. 2002, Carroll 1988, Lillegraven 1979, Hendy et al. 2009 | |||||
Age range: base of the Late/Upper Oligocene to the top of the Early/Lower Miocene or 27.30000 to 15.98000 Ma
Collections (18 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Oligocene | Mongolia | Amphechinus taatsiingolensis (75588 180971 182143 201162) | |
| Late/Upper Oligocene | Mongolia (Bayankhongor) | Amphechinus taatsiingolensis (type locality: 75598) | |
| Late/Upper Oligocene | Mongolia (Övörkhangai) | Amphechinus taatsiingolensis (182078 182081 187257) | |
| Late/Upper Oligocene - Early/Lower Miocene | Mongolia (Övörkhangai) | Amphechinus taatsiingolensis (180969) | |
| Early/Lower Miocene | Mongolia | Amphechinus taatsiingolensis (180965 180967 180975 180976 180977 182088 182089 182090 182136) |