Late Miocene large-sized Bovidae (Mammalia) from Dimeh, SW Iran: Contribution to depositional diachrony and palaeobiogeography

IF 1.6 4区地球科学 Q2 PALEONTOLOGY Geobios Pub Date : 2023-06-01 DOI:10.1016/j.geobios.2023.05.001

Zahra Orak , Dimitris S. Kostopoulos , Majid Mirzaie Ataabadi

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Abstract

We describe here cranial and dental material of large bovids (Bovidae, Mammalia) from the Upper Miocene fossil site of Dimeh, SW Iran. Six taxa have been recognized: Palaeoryx cf. pallasi, Skoufotragus laticeps, Plesiaddax? sp., Samokeros minotaurus, Tragoportax cf. amalthea and the new species Tragoportax perses. The (i) shortened, rectangularly shaped basioccipital with strong anterior tuberosities, (ii) weakly textured and subtriangularly shaped rugose area delimited by strong temporal ridges, (iii) deep and wide intercornual plateau, (iv) narrow interparietal, (v) wide nasals, and (vi) strongly tilted backwards, clearly heteronymously twisted horncores with sharp, flaring anterior keel, and highly positioned distal demarcation, are features that in combination differentiate T. perses nov. sp. from any other known Eurasian species of this genus. Ιn addition, its particular morphological features bring it closer to certain specimens of the Afro-Arabian region assigned to T. cyrenaicus. The new data, along with previous and revised ones on the small antelopines, complete the systematics of the Dimeh bovid assemblage and allow further discussing its significance at local and regional scales.

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伊朗西南部迪梅中新世晚期大型牛科（哺乳动物）：对沉积历时和古生物地理学的贡献

我们在此描述了来自伊朗西南部Dimeh上中新世化石遗址的大型牛科动物(牛科，哺乳动物)的头骨和牙齿材料。目前已发现6个分类群:palasi paleoryx, Skoufotragus laticeps, Plesiaddax?sp.， Samokeros minotaurus, Tragoportax cf.amalthea和新种Tragoportax perses。(i)短的矩形基底枕，前结节强，(ii)纹理弱，近三角形的褶皱区，由强大的颞嵴划分，(iii)深而宽的角间平台，(iv)窄的顶骨间，(v)宽的鼻骨，以及(vi)强烈向后倾斜，明显异名扭曲的角核，前龙骨锋利，突出，高度定位的远端界限。这些特征结合在一起，将美洲大蠊与任何其他已知的欧亚物种区分开来。Ιn此外，其特殊的形态特征使其更接近于非洲-阿拉伯地区的某些属于T. cyrenaicus的标本。新的数据，连同以前和修订的小羚羊的数据，完成了Dimeh牛羚组合的系统分类，并允许进一步讨论其在地方和区域尺度上的意义。

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来源期刊

Geobios 地学-古生物学

CiteScore

3.30

自引率

6.20%

发文量

审稿时长

6-12 weeks

期刊介绍： Geobios publishes bimonthly in English original peer-reviewed articles of international interest in any area of paleontology, paleobiology, paleoecology, paleobiogeography, (bio)stratigraphy and biogeochemistry. All taxonomic groups are treated, including microfossils, invertebrates, plants, vertebrates and ichnofossils. Geobios welcomes descriptive papers based on original material (e.g. large Systematic Paleontology works), as well as more analytically and/or methodologically oriented papers, provided they offer strong and significant biochronological/biostratigraphical, paleobiogeographical, paleobiological and/or phylogenetic new insights and perspectices. A high priority level is given to synchronic and/or diachronic studies based on multi- or inter-disciplinary approaches mixing various fields of Earth and Life Sciences. Works based on extant data are also considered, provided they offer significant insights into geological-time studies.