Tarsal morphology of the pleuraspidotheriid mammal Hilalia from the middle Eocene of Turkey

• Języki publikacji: EN

Abstrakty

EN

Pleuraspidotheriids are a group of primitive ungulate mammals that, until recently, were thought to be restricted to the late Paleocene of Western Europe. It has been hypothesized that this family actually survived in Central Anatolia until at least the middle Eocene. However, these anachronistically young Anatolian “survivors”, including the genus Hilalia, were previously documented mainly by dental remains. Here, we describe the previously unknown astragalus of Hilalia saribeya, which confirms the pleuraspidotheriid affinities of the genus, and supports phylogenetic reconstructions that place Hilalia as the sister group of Pleuraspidotherium. The morphology of the astragalus suggests sub-cursorial plantigrade locomotion for H. saribeya, although its tarsal morphology remains generalized enough that scansorial capabilities cannot be ruled out. The evolution of Hilalia is addressed in the context of the apparent geographic isolation of Central Anatolia during the Eocene. The endemic character of the mammalian fauna of Central Anatolia during the middle Eocene emphasizes how the complex paleogeography of the northern margin of Neotethys impacted local biotas in a region situated at the crossroads of very distinctive biogeographic zones.

Słowa kluczowe

EN

Turkey; Anatolia region; Eocene; Middle Eocene; Mammalia; placental mammal; Pleuraspidotheriidae; Hilalia; tarsal bone; fossil mammal; fossil record; paleontology; paleogeography; paleozoology

• Wydawca: -
• Czasopismo: Acta Palaeontologica Polonica
• Rocznik: 2017
• Tom: 62
• Numer: 1
• Opis fizyczny: p.173-179,fig.,ref.

Twórcy

Bibliografia

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Identyfikatory

DOI

10.4202/app.00314.2016