Pachycentrata Explained

Pachycentrata is an extinct genus of prehistoric amphibian.

Pachycentrata fossils have been found in the In Beceten Formation located in Tahoua, Niger. ^[1] The fossils have been dated to the late/upper Coniacian to Santonian periods.^[2] It is estimated to have snout-vent length about 7cm (03inches). The original phylogenetic analysis suggested that it was more closely related to Pipa than to Xenopus, and a recent phylogenetic supports this conclusion in an unconstrained phylogenetic analysis, but constraining for the topology obtained by molecular studies^{[3] [4]} yields less resolved results that place Pachycentrata in an unresolved polytomy with extant pipids and several extinct pipimorphs.^[5]

See also

• Prehistoric amphibian
• List of prehistoric amphibians

Notes and References

1. A. M. Báez and J.-C. Rage. 1998. Pipid frogs from the Upper Cretaceous of In Beceten, Niger. Palaeontology 41(4):669-691
2. Web site: Fossilworks . Paleodb.org . 17 December 2021.
3. Pyron . R. Alexander . Wiens . John J. . A large-scale phylogeny of Amphibia including over 2800 species, and a revised classification of extant frogs, salamanders, and caecilians . Molecular Phylogenetics and Evolution . 1 November 2011 . 61 . 2 . 543–583 . 10.1016/j.ympev.2011.06.012 . 21723399 . 2011MolPE..61..543A . 1055-7903.
4. Irisarri . Iker . Vences . Miguel . San Mauro . Diego . Glaw . Frank . Zardoya . Rafael . Reversal to air-driven sound production revealed by a molecular phylogeny of tongueless frogs, family Pipidae . BMC Evolutionary Biology . 27 April 2011 . 11 . 1 . 114 . 10.1186/1471-2148-11-114 . free . 21524293 . 2011BMCEE..11..114I . 1471-2148. 3111386 .
5. Lemierre . Alfred . Bailon . Salvador . Folie . Annelise . Laurin . Michel . A new pipid from the Cretaceous of Africa (In Becetèn, Niger) and early evolution of the Pipidae . Journal of Systematic Palaeontology . January 2023 . 21 . 1 . 10.1080/14772019.2023.2266428 . 2023JSPal..2166428L . en . 1477-2019.