<i>Dimetropus osageorum</i>n. isp. from the Early Permian of Oklahoma (USA): A Trace and its Trackmaker

Sacchi, Eva; Cifelli, Richard L.; Citton, Paolo; Nicosia, Umberto; Romano, Marco

doi:10.1080/10420940.2014.933070

Cited by 27 publications

(43 citation statements)

References 16 publications

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“…Unfortunately, there are no fossils of large amniote taxa known (whether due to poor sampling or taphonomy is unclear), but the ichnotaxa Dromopus and Dimetropus are known from the area [36], with the latter traditionally associated with sphenacodontid synapsids [37][38][39]. Although recent examination shows Dimetropus to be more diverse than previously thought [40], it is still considered representative of large pelycosauriangrade synapsids, and both Dimetropus and Dromopus are both highly characteristic of the early Permian.…”

Section: Kungurian Equatorialmentioning

confidence: 99%

Olson's Extinction and the latitudinal biodiversity gradient of tetrapods in the Permian

et al. 2017

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The terrestrial vertebrate fauna underwent a substantial change in composition between the lower and middle Permian. The lower Permian fauna was characterized by diverse and abundant amphibians and pelycosauriangrade synapsids. During the middle Permian, a therapsid-dominated fauna, containing a diverse array of parareptiles and a considerably reduced richness of amphibians, replaced this. However, it is debated whether the transition is a genuine event, accompanied by a mass extinction, or whether it is merely an artefact of the shift in sampling from the palaeoequatorial latitudes to the palaeotemperate latitudes. Here we use an up-to-date biostratigraphy and incorporate recent discoveries to thoroughly review the Permian tetrapod fossil record. We suggest that the faunal transition represents a genuine event; the lower Permian temperate faunas are more similar to lower Permian equatorial faunas than middle Permian temperate faunas. The transition was not consistent across latitudes; the turnover occurred more rapidly in Russia, but was delayed in North America. The argument that the mass extinction is an artefact of a latitudinal biodiversity gradient and a shift in sampling localities is rejected: sampling correction demonstrates an inverse latitudinal biodiversity gradient was prevalent during the Permian, with peak diversity in the temperate latitudes.

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Section: Kungurian Equatorialmentioning

confidence: 99%

Olson's Extinction and the latitudinal biodiversity gradient of tetrapods in the Permian

et al. 2017

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“…The separation of Dimetropus into ichnospecies beyond that of the type species, D. leisneranus , has been considered unsupported (Voigt, 2005; Voigt, 2007; Voigt & Lucas, 2015) although a new ichnospecies , Dimetropus osageorum , has been recently proposed (Sacchi et al, 2014). Dimetropus osageorum tracks exhibit proportionally shorter digits and a greater degree of heteropody than D. leisnerianus .…”

Section: Systematic Palaeoichnologymentioning

confidence: 99%

“…Dimetropus is well known from Western and Central Europe (Tucker & Smith, 2004; Voigt, 2005; Voigt & Ganzelewski, 2010), Eastern Europe (Lucas, Lozovsky & Shishkin, 1999; Ptaszyński & Niedźwiedzki, 2004; Niedźwiedzki & Bojanowski, 2012; Voigt et al, 2012), North America (Hunt, Lucas & Lockley, 2004; Sacchi et al, 2014; Voigt & Lucas, 2015), Morocco (Voigt et al, 2011a; Voigt et al, 2011b), and Argentina (Hunt & Lucas, 1998). Dimetropus tracks have been found from the middle Moscovian to the middle Kungurian (Tucker & Smith, 2004; Voigt & Lucas, 2015).…”

Section: Systematic Palaeoichnologymentioning

confidence: 99%

A revision of tetrapod footprints from the late Carboniferous of the West Midlands, UK

Meade¹,

Jones²,

Butler³

2016

PeerJ

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A series of sandstone slabs from Hamstead, Birmingham (West Midlands, UK), preserve an assemblage of tetrapod trackways and individual tracks from the Enville Member of the Salop Formation (late Carboniferous: late Moscovian–Kasimovian). This material has received limited previous study, despite being one of the few British sites to preserve Carboniferous tetrapod footprints. Here, we restudy and revise the taxonomy of this material, and document it using 3D models produced using photogrammetry. The assemblage is dominated by large tracks assigned to Limnopus isp., which were made by early amphibians (temnospondyls). A number of similar but smaller tracks are assigned to Batrachichnus salamandroides (also made by temnospondyls). Dimetropus leisnerianus (made by early synapsids) and Dromopus lacertoides (made by lizard-like sauropsids such as araeoscelids) are also present. This ichnofauna contrasts with a slightly stratigraphically older, more extensive and better-studied assemblage from Alveley (Shropshire), which is dominated by small amphibians with relatively rare reptiliomorphs, but which lacks Dromopus tracks. The presence of Dromopus lacertoides at Hamstead is consistent with the trend towards increasing aridity through the late Carboniferous. It is possible that the assemblage is the stratigraphically oldest occurrence of this important amniote ichnotaxon.

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“…The newly described taxon is crucial in showing that the large herbivorous caseids evolved from small, nonherbivorous taxa. Sacchi et al (2014) in discussing the new ichnotaxon Dimetropus osageorum from the Early Permian of Oklahoma (USA) found a very good correspondence between the overall morphology of footprints ("footprint holomorphy" sensu Romano et al, 2016) and the foot structure in large caseids, making it a very compelling attribution to the Caseasauria (even if a large edaphosaurid cannot be excluded a priori). Romano and Nicosia (2015) conducted a phylogenetic analysis of Caseidae including for the first time the fragmentary taxa 'Casea' nicholsi and Caseoides sanangeloensis.…”

Section: Introductionmentioning

confidence: 99%

New material of Alierasaurus ronchii (Synapsida, Caseidae) from the Permian of Sardinia (Italy), and its phylogenetic affinities

Romano

Ronchi

Maganuco

et al. 2017

Palaeontologia Electronica

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Dimetropus osageorumn. isp. from the Early Permian of Oklahoma (USA): A Trace and its Trackmaker

Cited by 27 publications

References 16 publications

Olson's Extinction and the latitudinal biodiversity gradient of tetrapods in the Permian

Olson's Extinction and the latitudinal biodiversity gradient of tetrapods in the Permian

A revision of tetrapod footprints from the late Carboniferous of the West Midlands, UK

New material of Alierasaurus ronchii (Synapsida, Caseidae) from the Permian of Sardinia (Italy), and its phylogenetic affinities

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