A new genus and species of discoglossid frog from the Upper Cretaceous of the Gobi Desert

Špinar, Z. V.; Tatarinov, L. P.

doi:10.1080/02724634.1986.10011605

Cited by 28 publications

(11 citation statements)

References 5 publications

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“…Liaobatrachus differs from Gobiates Špinar and Tatarinov 1986 [33], [34] and Cretasalia Gubin 1999 [34], [35] from the Upper Cretaceous of Central Asia in the following respects: (1) cranial dermal sculpture: in Gobiates pit-ridge sculpture is present on all dermal roofing cranial bones, dermal sculpture in Cretasalia is limited to the maxilla, and Liaobatrachus lacks dermal sculpture; (2) morphology of maxilla: in Gobiates this bone is not bifurcated anteriorly and has a small facial process, whereas in Liaobatrachus the facial process is proportionally larger and the anterior end is bifurcated into dorsal and ventral rami (unknown in Cretasalia ); (3) contact between nasals: the nasals of Gobiates and Cretasalia are in contact only anteromedially, whereas Liaobatrachus has extensive midline contact; (4) squamoso-maxillary contact: in Gobiates and Cretasalia the zygomatic ramus of the squamosal is long and in contact with the maxilla, whereas in Liaobatrachus the squamosal and maxilla do not contact one another; (5) morphology of vomer: the vomer of Gobiates has no postchoanal process, whereas that of Liaobatrachus bears a long postchoanal process (unknown in Cretasalia ); (6) cultriform process of parasphenoid: the cultriform process of Gobiates does not reach the level of vomers, whereas that of Liaobatrachus does (unknown in Cretasalia ); (7) fusion of the prootic and exoccipital: in Gobiates and Cretasalia the two bones are separated by a suture, instead of fully fused as in Liaobatrachus . However, these three anurans also share many similarities.…”

Section: Systematic Paleontologymentioning

confidence: 97%

Anurans from the Lower Cretaceous Jehol Group of Western Liaoning, China

et al. 2013

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BackgroundTo date, the Lower Cretaceous Jehol Group of western Liaoning, China has yielded five monotypic genera of anurans, including Liaobatrachus grabaui, Callobatrachus sanyanensis, Mesophryne beipiaoensis, Dalianbatrachus mengi, and Yizhoubatrachus macilentus. However, the validity and distinctness of these taxa have been questioned.Methodology/Principal FindingWe provide a comprehensive analysis of the Jehol frogs that includes a re-examination of the published taxa as well as an examination of a number of new specimens that have been collected over the past 10 years. The results show that the five previously named taxa can be referred to three species of one genus–Liaobatrachus grabaui, L. beipiaoensis comb. nov. and L. macilentus comb. nov.. The diagnosis of Liaobatrachus is revised, and a new diagnosis is provided for each species of this genus. We also establish Liaobatrachus zhaoi sp. nov., on the basis of a dozen well-preserved specimens from a new locality. This taxon is distinguished by a unique combination of characteristics, including relatively long hind limbs, a rounded rather than triangular acetabulum, and a gradually-tapering cultriform process of the parasphenoid. In addition, an unnamed frog from a higher horizon, which has narrow sacral diapophyses and particularly long legs, is different from Liaobatrachus and represents another form of anuran in the Jehol Biota.Conclusion/SignificanceComparisons with other Mesozoic and extant anurans and the primary phylogenetic analysis both suggest that Liaobatrachus is a member of the anuran crown-group and forms a polytomy with leiopelmatids (Ascaphus and Leiopelma) and the remaining crown-group anurans (Lalagobatrachia).

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Section: Systematic Paleontologymentioning

confidence: 97%

Anurans from the Lower Cretaceous Jehol Group of Western Liaoning, China

et al. 2013

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“…Discussion: This ornamentation is common in pelobatids and gobiatids (Borsuk-Białynicka, 1978;Ro cek, 1982Ro cek, , 2008Ro cek, , 2013Spinar and Tatarinov, 1986;Ro cek and Nessov, 1993;Henrici, 1994). IPS-85022 is similar to an anuran maxilla from Chera described by Company and Szentesi (2012), although several characters might suggest a different taxon.…”

Section: L'espinaumentioning

confidence: 96%

Late Cretaceous (Maastrichtian) amphibians and squamates from northeastern Iberia

Blanco

Bolet

Blain

et al. 2016

Cretaceous Research

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“…Two additional East Asian fossil species, Gobiates spinari and Macropelobates osborni , were both recovered as stem Pelobatidae. The Late Cretaceous Gobiates spinari from Mongolia was originally reported as a pelobatoid 8 , but was later excluded from the clade 16 17 . Our results support it as a crown-group pelobatoid.…”

Section: Resultsmentioning

confidence: 99%

A burrowing frog from the late Paleocene of Mongolia uncovers a deep history of spadefoot toads (Pelobatoidea) in East Asia

Chen

Bever

et al. 2016

Sci Rep

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Fossils are indispensible in understanding the evolutionary origins of the modern fauna. Crown-group spadefoot toads (Anura: Pelobatoidea) are the best-known fossorial frog clade to inhabit arid environments, with species utilizing a characteristic bony spade on their foot for burrowing. Endemic to the Northern Hemisphere, they are distributed across the Holarctic except East Asia. Here we report a rare fossil of a crown-group spadefoot toad from the late Paleocene of Mongolia. The phylogenetic analysis using both morphological and molecular information recovered this Asian fossil inside the modern North American pelobatoid clade Scaphiopodidae. The presence of a spade and the phylogenetic position of the new fossil frog strongly support its burrowing behavior. The late Paleocene age and other information suggestive of a mild climate cast doubt on the conventional assertion that burrowing evolved as an adaptation to aridity in spadefoot toads. Temporally and geographically, the new fossil provides the earliest record of Scaphiopodidae worldwide, and the only member of the group in Asia. Quantitative biogeographic analysis suggests that Scaphiopodidae, despite originating in North America, dispersed into East Asia via Beringia in the Early Cenozoic. The absence of spadefoot toads in East Asia today is a result of extinction.

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A new genus and species of discoglossid frog from the Upper Cretaceous of the Gobi Desert

Cited by 28 publications

References 5 publications

Anurans from the Lower Cretaceous Jehol Group of Western Liaoning, China

Anurans from the Lower Cretaceous Jehol Group of Western Liaoning, China

Late Cretaceous (Maastrichtian) amphibians and squamates from northeastern Iberia

A burrowing frog from the late Paleocene of Mongolia uncovers a deep history of spadefoot toads (Pelobatoidea) in East Asia

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