Amphimachairodus hezhengensis, Jiangzuo & Werdelin & Sanisidro & Yang & Fu & Li & Wang & Deng, 2023

Jiangzuo, Qigao, Werdelin, Lars, Sanisidro, Oscar, Yang, Rong, Fu, Jiao, Li, Shijie, Wang, Shiqi & Deng, Tao, 2023, Origin of adaptations to open environments and social behaviour in sabretoothed cats from the northeastern border of the Tibetan Plateau, Proceedings of the Royal Society B: Biological Sciences (20230019) 290 (1997), pp. 1-11 : 1992

publication ID

https://doi.org/ 10.1098/rspb.2023.0019

DOI

https://doi.org/10.5281/zenodo.7893745

persistent identifier

https://treatment.plazi.org/id/039287B5-8B11-FFFB-FF5F-F816FC6BFC06

treatment provided by

Jonas

scientific name

Amphimachairodus hezhengensis
status

sp. nov.

Amphimachairodus hezhengensis sp. nov.

Machairodus palanderi p.257, Deng et al. 2013

Amphimachairodus sp. p.11 Jiangzuo et al. 2023

Holotype: HMV2041 , a nearly complete cranium ( figure 1 View Figure 1 ; electronic supplemenatry material, figures S1 View Figure 1 and S2) .

Etymology: After the place (Hezheng Paleozoological Museum, Hezheng, China) where the specimen was found and is currently stored.

Type locality: Houshan, Linxia Basin , Gansu province of northern China.

Chronology and distribution: Thus far only known from the early Late Miocene of northern China.

Diagnosis: medium-sized Amphimachairodus with small incisors and I1 with lingually posited accessory cusps; long C-P3 diastema; presence of P2; relatively small cheek teeth; small P4 preparastyle and moderate protocone.

Differential diagnosis: differs from Machairodus and Nimraoides in having different cranial morphology, e.g. lower angle between facial and neurocranial part, wide forehead, retracted orbit and long rostrum, shorter and dorsally arched zygomatic arch, slightly overhanging glenoid fossa, more arched incisor row and more separated lingual accessory cusps in I2, presence of P2, more distinct P4 preparastyle and smaller protocone; differs from Lokotunjailurus in having larger size, longer C-P3 diastema, stronger P3 anterior accessory cusp and more robust P4; differs from other species of Amphimachairodus in having smaller incisors, I1 with two closely located lingual accessory cusps, longer C-P3 diastema, smaller cheek teeth, smaller P4 preparastyle and slightly larger protocone.

Kingdom

Animalia

Phylum

Chordata

Class

Mammalia

Order

Carnivora

Family

Felidae

Genus

Amphimachairodus

Loc

Amphimachairodus hezhengensis

Jiangzuo, Qigao, Werdelin, Lars, Sanisidro, Oscar, Yang, Rong, Fu, Jiao, Li, Shijie, Wang, Shiqi & Deng, Tao 2023
2023
Loc

Amphimachairodus sp.

Jiangzuo 2023: 1992
2023
Loc

Machairodus palanderi

Deng 2013: 1992
2013
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