Yindirtemys, Bohlin, 1946
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publication ID |
https://doi.org/ 10.26879/649 |
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persistent identifier |
https://treatment.plazi.org/id/1254905A-FF93-FF9F-413F-FBB95533FAB2 |
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Felipe |
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scientific name |
Yindirtemys |
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Yindirtemys deflexus ( Teilhard de Chardin, 1926)
Figures 4.1 View FIGURE 4 -18, 5.1-21
1926 Tataromys deflexus Teilhard de Chardin, p. 28, p.31, fig. 15B; pl. IV, fig. 3.
1942 Tataromys deflexus Teilhard de Chardin and Leroy, p. 25, 89.
1946 Tataromys Bohlin , p. 95.
1951 Tataromys deflexus Stehlin and Schaub, p. 125, fig. 181.
1951 Tataromys sp. Stehlin and Schaub, p. 289, fig. 496.
1958 Tataromys sp. Schaub, p. 781, fig. 211.
1968 Tataromys deflexus Mellett, p. 6, 10.
1974 Tataromys deflexus Kowalski, p. 160-161, pl. XLVII, fig. 1.
1974 Tataromys gobiensis Kowalski , p. 162.
1981 Tataromys deflexus Wang, Chang, Meng, and Chen, p. 29.
1993 Yindirtemys sajakensis Bendukidze, p. 60- 63, pl. 20, figs 2, 3, 4, 5, 6, 7; pl. 21.
1994 Yindirtemys deflexus Wang, p. 37, figs 2a, b.
1997 Yindirtemys deflexus Wang, p. 30-34.
1997 Yindirtemys gobiensis Wang , p. 34-35.
1997 Yindirtemys sajakensis Bendukidze, p. 207.
1999 Yindirtemys deflexus Höck, Daxner-Höck, Schmid, Badamgarav, Frank, Furtmüller, Montag, Barsbold, Khand, and Sodov, p. 116-118.
2004 Yindirtemys sajakensis Lopatin, p. 298.
2006 Yindirtemys deflexus Vianey-Liaud, Schmidt-Kittler, and Marivaux, p. 164-165, 190-191.
2007 Yindirtemys deflexus Schmidt-Kittler, Vianey-Liaud and Marivaux, p. 191-201.
2007 Yindirtemys deflexus Daxner-Höck and Badamgarav, p. 15-16, 18.
2009 Yindirtemys deflexus Bendukidze, de Bruijn, and Van den Hoek Ostende, p. 351-352, 356, 368-369.
2010 Yindirtemys deflexus Daxner-Höck, Badamgarav, and Erbajeva p. 358, 362-363, fig. 6.1-6.2.
2014 Yindirtemys deflexus Gomes Rodrigues, Marivaux, and Vianey-Liaud p. 7.
Holotype. Fragment of a right maxilla with M2 and M3. Teilhard de Chardin (1926: figure 15B).
Type Locality. Saint Jacques (Inner Mongolia, China).
Material and Measurements. Tables 2 and 3. Stratigraphic Range in Mongolia. Upper part of the late Oligocene, Mongolian biozone C1; Hsanda Gol and Loh formations.
Geographic Distribution. Valley of Lakes ( Mongolia), North Aral region ( Kazakhstan), Gansu province ( China), Ulantatal area and Saint Jacques (Inner Mongolia, China).
Description. The description of Yindirtemys deflexus is based on the very rich material from the locality Huch Teeg (RHN-A/7) in Mongolia.
P4. The labial anteroloph is incipient (one out of 10 specimens), short (seven out of 10) or medium (two out of 10). The lingual anteroloph is short in one, incipient in three, and absent in six specimens. Out of 10 specimens, the labial posteroloph is short in six, medium in three, and long and connected to the paracone in one. The labial crest of the metaloph is long and connected to the posteroloph (four out of 10), or there is a double crest (six out of 10). The lingual posteroloph is incipient in one specimen, short in one, and long and connected to the protocone in seven specimens. The lingual crest of the metaloph is short (one out of nine specimens), or it is long and connected to the posteroloph (eight out of nine) ( Figures 4.9 View FIGURE 4 -11).
M1. There are only two teeth, M1s, of which one is heavily worn. In the less worn specimen the labial anteroloph is of medium length. The lingual anteroloph is absent. There is an incipient forward paracone spur. The protoloph is anterior and transversely directed to the protocone.
M2. The labial anteroloph is short (one out of four), medium (one out of four), or it is connected to the paracone (two out of four). The lingual anteroloph is absent (four out of four). A forward paracone spur is connected to the labial anteroloph in three (out of five) specimens. The protoloph is anterior (four out of four) and runs proverse in two specimens and runs transverse in the remaining two. In one out of four, there is a short and wide crochet, in the remaining three the anticrochet is connected to the posteroloph. The metaloph is transverse (two out of four) or points backwards (two out of four), and it is transversely directed in one and proverse in three specimens ( Figure 4.13 View FIGURE 4 ).
M3. The labial anteroloph is connected to the paracone in three specimens and is of medium length in two teeth. The lingual anteroloph is incipient in two and absent in three specimens. The anterior groove is always retroverse, and it is deep (three out of five specimens) or shallow (two out of five). A forward paracone spur is connected to the labial anteroloph in one out of five specimens. The protoloph is anterior in four specimens and double in one. It is transversely directed in three and proverse in the remaining two. In one out of five, there is an incipient crochet, in two the crochet is well developed, and in the remaining two there is a deflexus structure and anticrochet. The sinus is retroverse (two out of six specimens), transverse (two out of six) or proverse, (two out of six) and always deep. The metaloph is transverse (three out of five) or points backwards (two out of five), and it is transversely directed in one specimen and proverse in four. The morphology of the teeth is swollen and bulky (three out of five) or the teeth are straighter, like M2 (two out of five) ( Figure 4.5-7, 4.12 View FIGURE 4 View FIGURE 5 View FIGURE 6 View FIGURE 7 ).
DP4. There is only one specimen. The labial anteroloph is short. The lingual anteroloph is absent. There is an incipient anterior paracone spur. The protoloph is anteriorly extended from the protocone and is connected to the anterocone. An anticrochet is connected to the posteroloph. The metaloph points backwards ( Figure 4.8 View FIGURE 4 ).
p4. The anterior sinusoid is always triangular and in three out of five bears a strong central furrow. The hypoconid is present in two and absent in three specimens. The hypolophid is present (three out of five specimens), double (one out of five), or absent (one out of five). In one out of four there is a hypoconulid ( Figure 5.10, 5.12 View FIGURE 5 -13).
m1. The anterior cingulid is short in three specimens and long in four. In all specimens the metalophid I is well connected to the protoconid. The mesolophid is connected to the metaconid (six out of six specimens). The sinusid is M-shaped. The hypoconulid is always present (seven out of seven). The hypolophid is connected to the anterior arm of the hypoconid (four out of five) or is directly connected to the hypconid (one out of five) ( Figure 5.10 View FIGURE 5 ).
m2. The anterior cingulid is short (two out of 11 specimens) or long (nine out of 11). The metalophid I is well connected to the protoconid in all the specimens. The mesolophid is connected to the metaconid in 10 specimens, is medium long in one and short in one. The sinusid is M-shaped. In 11 out of 12 specimens the hypoconulid is present; the remaining specimen bears two hypoconulids. The hypolophid is always connected to the anterior arm of the hypoconid ( Figure 5.10, 5.15, 5.17 View FIGURE 5 ).
m3. The anterior cingulid is short in two specimens and long in four. The metalophid I is well connected to the protoconid. The mesolophid is long and connected to the metaconid (seven out of eight specimens) or is short (one out of eight). The sinusid is M-shaped. The hypoconulid is always present. In all specimens the hypolophid is connected to the anterior arm of the hypoconid ( Figure 5.10, 5.16 View FIGURE 5 - 17).
dp4. The anterior cingulid is short (one out of two specimens) or long (one out of two). The metalophid I is connected to the protoconid. The trigonid basin is wide, shallow, and it is close. The mesolophid is long and connected to the metaconid. The sinusid is M-shaped in one specimen and crescent-shaped in the other. In one specimen there is an incipient stylid in the sinusid. The hypoconulid is always present. In one out of two specimens there is a stylid in the hypoconulid ( Figure 5.11, 5.14 View FIGURE 5 ).
Remarks. The Yindirtemys material from the Valley of Lakes does not differ from the holotype of Yindirtemys deflexus from Saint Jacques ( Teilhard de Chardin, 1926) and also resembles the specimens of Y. deflexus from the Ulantatal area ( Vianey-Liaud et al., 2006).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.