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

Métais, Grégoire; Beard, K. Christopher; Erdal, Ozan; Erturaç, Korhan

doi:10.4202/app.00314.2016

Cited by 12 publications

(14 citation statements)

References 18 publications

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“…AÜJM 2002–25 was collected from the Lülük member of the Uzunçarşıdere Formation (UCF), which is part of the small Orhaniye-Güvenç sedimentary basin located at the northwestern edge of the city of Ankara, approximately 5 km southwest of the town of Kazan, in central Turkey [ 89 ]. The Lülük member is the lowest of the three members currently recognised within the UCF (together with the Gökdere [middle], and Sarıbeyler [upper] members), and is the source of all fossil mammals known from the UCF to date [ 89 – 94 ]. AÜJM 2002–25 is from locality AK33, which is approximately 90m above the base of the UCF, at Memlik village (N40° 5.5914’, E32° 44.3924’).…”

Section: Resultsmentioning

confidence: 99%

“…AÜJM 2002–25 is from locality AK33, which is approximately 90m above the base of the UCF, at Memlik village (N40° 5.5914’, E32° 44.3924’). Until recently, the age of the UCF was poorly constrained, but a combination of U-Pb dating of zircons and magnetostratigraphy now support a date of 44–42 MYA (= Lutetian) for the formation as a whole, and 44–43 MYA for the Lülük member [ 89 , 94 ].…”

Section: Resultsmentioning

confidence: 99%

“…However, although still poorly known, the UCF mammal fauna appears to be highly endemic ( Table 7 ), and carnivorous eutherians have yet to be found there. As noted by Metais et al [ 94 ], the presence of multiple species of the pleuraspidotheriid Hilalia in the Lutetian (44–43 MYA) UCF mammal fauna is particularly striking: the youngest record of Pleuraspidotheriidae from Europe is latest Palaeocene, i.e. 12–14 million years older [ 189 ].…”

Section: Discussionmentioning

confidence: 99%

“…12–14 million years older [ 189 ]. This “anachronistic” presence of pleuraspidotheriids suggests that the UCF may preserve a mammal fauna that evolved largely in isolation during the early Cenozoic, with only limited biogeographical connectivity to Laurasia and Africa [ 89 , 94 ]. This is congruent with geological evidence that this region of Turkey was an island for at least part of the early Cenozoic [ 188 , 190 ].…”

Section: Discussionmentioning

confidence: 99%

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Skeleton of an unusual, cat-sized marsupial relative (Metatheria: Marsupialiformes) from the middle Eocene (Lutetian: 44-43 million years ago) of Turkey

Maga

Beck

2017

PLoS ONE

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We describe a near-complete, three-dimensionally preserved skeleton of a metatherian (relative of modern marsupials) from the middle Eocene (Lutetian: 44–43 million years ago) Lülük member of the Uzunçarşıdere Formation, central Turkey. With an estimated body mass of 3–4 kg, about the size of a domestic cat (Felis catus) or spotted quoll (Dasyurus maculatus), it is an order of magnitude larger than the largest fossil metatherians previously known from the Cenozoic of the northern hemisphere. This new taxon is characterised by large, broad third premolars that probably represent adaptations for hard object feeding (durophagy), and its craniodental morphology suggests the capacity to generate high bite forces. Qualitative and quantitative functional analyses of its postcranial skeleton indicate that it was probably scansorial and relatively agile, perhaps broadly similar in locomotor mode to the spotted quoll, but with a greater capacity for climbing and grasping. Bayesian phylogenetic analysis of a total evidence dataset comprising 259 morphological characters and 9kb of DNA sequence data from five nuclear protein-coding genes, using both undated and “tip-and-node dating” approaches, place the new taxon outside the marsupial crown-clade, but within the clade Marsupialiformes. It demonstrates that at least one metatherian lineage evolved to occupy the small-medium, meso- or hypo-carnivore niche in the northern hemisphere during the early Cenozoic, at a time when there were numerous eutherians (placentals and their fossil relatives) filling similar niches. However, the known mammal fauna from Uzunçarşıdere Formation appears highly endemic, and geological evidence suggests that this region of Turkey was an island for at least part of the early Cenozoic, and so the new taxon may have evolved in isolation from potential eutherian competitors. Nevertheless, the new taxon reveals previously unsuspected ecomorphological disparity among northern hemisphere metatherians during the first half of the Cenozoic.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Skeleton of an unusual, cat-sized marsupial relative (Metatheria: Marsupialiformes) from the middle Eocene (Lutetian: 44-43 million years ago) of Turkey

Maga

Beck

2017

PLoS ONE

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“…It is debated whether Pontide‐ATB collision was synchronous or diachronous along strike (Kaymakci et al, , ; van Hinsbergen et al, ). These different models resulted in competitive paleogeographic scenarios requiring unique geodynamic (e.g., Pourteau et al, ) and biogeographic (Jones et al, ; Métais et al, , ; Sen , ) reconstructions of the Mediterranean domain and the broader Alpine‐Zagros‐Himalayan‐Tibetan orogen. Synchronous collision models suggest contemporaneous collision in central and western Anatolia whereas diachronous collision models suggest westward younging of collision and suturing across Anatolia (cf.…”

Section: Introductionmentioning

confidence: 99%

Collision Chronology Along the İzmir‐Ankara‐Erzincan Suture Zone: Insights From the Sarıcakaya Basin, Western Anatolia

et al. 2019

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Debate persists concerning the timing and geodynamics of intercontinental collision, style of syncollisional deformation, and development of topography and fold-and-thrust belts along the >1,700-km-long İzmir-Ankara-Erzincan suture zone (İAESZ) in Turkey. Resolving this debate is a necessary precursor to evaluating the integrity of convergent margin models and kinematic, topographic, and biogeographic reconstructions of the Mediterranean domain. Geodynamic models argue either for a synchronous or diachronous collision during either the Late Cretaceous and/or Eocene, followed by Eocene slab breakoff and postcollisional magmatism. We investigate the collision chronology in western Anatolia as recorded in the sedimentary archives of the 90-km-long Sarıcakaya Basin perched at shallow structural levels along the İAESZ. Based on new zircon U-Pb geochronology and depositional environment and sedimentary provenance results, we demonstrate that the Sarıcakaya Basin is an Eocene sedimentary basin with sediment sourced from both the İAESZ and Söğüt Thrust fault to the south and north, respectively, and formed primarily by flexural loading from north-south shortening along the syncollisional Söğüt Thrust. Our results refine the timing of collision between the Anatolides and Pontide terranes in western Anatolia to Maastrichtian-Middle Paleocene and Early Eocene crustal shortening and basin formation. Furthermore, we demonstrate contemporaneous collision, deformation, and magmatism across the İAESZ, supporting synchronous collision models. We show that regional postcollisional magmatism can be explained by renewed underthrusting instead of slab breakoff. This new İAESZ chronology provides additional constraints for kinematic, geodynamic, and biogeographic reconstructions of the Mediterranean domain.

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Sedimentary provenance from the evolving forearc-to-foreland Central Sakarya Basin, western Anatolia reveals multi-phase intercontinental collision

Mueller¹,

Licht²,

Campbell³

et al. 2021

Preprint

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 Multi-phase intercontinental collision is identified in western Anatolia by sedimentary basin changes  Sedimentary provenance change indicate collision was at 76 Ma, but significant thickskinned deformation was delayed until 54 Ma  The 20 Myr duration of initial collision can be explained by three multi-stage mechanisms involving changes in plate coupling manuscript submitted to Geochemistry, Geophysics, Geosystems

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

Cited by 12 publications

References 18 publications

Skeleton of an unusual, cat-sized marsupial relative (Metatheria: Marsupialiformes) from the middle Eocene (Lutetian: 44-43 million years ago) of Turkey

Skeleton of an unusual, cat-sized marsupial relative (Metatheria: Marsupialiformes) from the middle Eocene (Lutetian: 44-43 million years ago) of Turkey

Collision Chronology Along the İzmir‐Ankara‐Erzincan Suture Zone: Insights From the Sarıcakaya Basin, Western Anatolia

Sedimentary provenance from the evolving forearc-to-foreland Central Sakarya Basin, western Anatolia reveals multi-phase intercontinental collision

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