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Zhalmouzia bazhanovi
Taxonomy
Zhalmouzia bazhanovi was named by Averianov et al. (2012). Its type specimen is ZIN 100639, a mandible (left dentary fragment with m2-3 and alveoli for c, p1–5, and m1), and it is a 3D body fossil. Its type locality is Shakh Shakh 2C, which is in a Santonian/Campanian terrestrial claystone in the Bostobe Formation of Kazakhstan. It is the type species of Zhalmouzia.
Synonymy list
| Year | Name and author |
|---|---|
| 2012 | Zhalmouzia bazhanovi Averianov et al. fig. 2A |
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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.
†Zhalmouzia bazhanovi Averianov et al. 2012
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. Averianov et al. 2012 | Z. bazhanovi is referred to Zhelestidae because the protoconid in this specimen is subequal to the para- and/or metaconid, the protocristid is transverse, and the hypoconulid closely approximates the entoconid. Z. bazhanovi differs from Avitotherium Cifelli, 1990 because the paraconid is not on the lingual margin of the tooth, and from Borisodon Archibald and Averianov, 2012 in the presence of a rounded mesiolingual vertical crest of the paraconid and the absence of the Meckelian groove; differs from Borisodon, Gallolestes Lillegraven, 1976, and Eozhelestes Nesov, 1997 in having a trigonid less than twice the height of the talonid, and from Gallolestes, Avitotherium, and Parazhelestes Nesov, 1993 in a trigonid angle of 36-49° (as opposed to 35° or less in the latter taxa); differs from Borisodon and Parazhelestes in having the mandibular symphysis extending to the level of p3 or further posteriorly; differs from Eozhelestes in having a protoconid subequal to the para- and/or metaconid, and a cristid obliqua contacting the protocristid labial to the protocristid notch; differs from Avitotherium and Eozhelestes in having a transverse protocristid, and from Gallolestes in having a mesiolabial cuspule f with a distinct cingular shelf. Z. bazhanovi resembles Eoungulatum Nesov, Archibald and Kielan-Jaworowska, 1998, and differs from all other zhelestids in having an ultimate lower molar smaller than the penultimate one (the state of this character is unknown for Avitotherium). Z. bazhanovi differs from Eoungulatum in having a short and erect hypoconulid on the ultimate lower molar, and because the ventral border of the masseteric fossa is present as a well-defined crest. Finally, Z. bazhanovi differs from all other known zhelestids in having a posteriormost mental foramen located below the penultimate premolar (state unknown in Avitotherium) |
Measurements
No measurements are available
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| Source: subc = subclass, c = class, subp = subphylum | |||||
| References: Lillegraven 1979, Ji et al. 2002, Hendy et al. 2009, Carroll 1988 | |||||
Age range: base of the Santonian to the top of the Early/Lower Campanian or 86.30000 to 70.60000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Santonian - Early/Lower Campanian | Kazakhstan (Qyzylorda) | Zhalmouzia bazhanovi (type locality: 135527) |