The Pipidae are a family of primitive, tongueless frogs. There are 41 species in the family, found in tropical South America (genus Pipa) and sub-Saharan Africa (the three other genera).
| Pipidae Temporal range:
| |
|---|---|
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| African dwarf frog | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Amphibia |
| Order: | Anura |
| Clade: | Pipoidea |
| Clade: | Pipimorpha |
| Family: | Pipidae Gray 1825 |
| |
| Distribution of Pipidae in black | |
Description
editPipid frogs are highly aquatic and have numerous morphological modifications befitting their habitat. For example, the feet are completely webbed, the body is flattened, and a lateral line system is present in adults.[1] In addition, pipids possess highly modified ears for producing and receiving sound under water. They lack a tongue or vocal cords, instead having bony rods in the larynx that help produce sound. They range from 4 to 19 cm (1.6 to 7.5 in) in body length.[2]
Taxonomy
editMorphological data suggest that Xenopus is the sister-group of all other pipids,[3][4] whereas molecular data consistently suggest that Pipa is the sister-group of other pipids.[5][6]
Family Pipidae Gray 1825[7]
- Hymenochirus Boulenger 1896 - dwarf clawed frogs (4 species)
- Pipa Laurenti 1768 - Surinam toads (7 species)
- Pseudhymenochirus Chabanaud 1920 - Merlin's dwarf gray frog or Merlin's clawed frog (1 species)
- Xenopus Wagler 1827 - clawed frogs (29 species)[8]
Fossil record
editThe oldest fossil records of frogs more closely related to pipid frogs than to other extant frog families (Pipimorpha) extends into the Early Cretaceous. The oldest known crown group pipids are Oumtkoutia and Pachycentrata from the Upper Cretaceous of Morocco and Niger, respectively.[9]
Included taxa after A. M. Aranciaga Rolando et al. 2019[10]
- †Oumtkoutia (Rage and Dutheil 2008) Aoufous Formation, Morocco, Late Cretaceous (Cenomanian)
- †Llankibatrachus (Báez and Pugener 2003) Huitrera Formation, Argentina, Eocene
- †Pachycentrata (Báez and Rage 2004) (= Pachybatrachus Báez and Rage, 1998) In Beceten Formation, Niger, Late Cretaceous (Coniacian)
- †"Shelania" laurenti (Baez and Pugener 1998) Argentina, Eocene
- "Xenopus" romeri (Estes 1975) Companhia National de Cimento Portland Quarry, Brazil, Paleocene
- †Eoxenopoides (Haughton 1931) South Africa, Late Cretaceous (Maastrichtian)
- †Singidella (Báez and Harrison 2005) Tanzania, Eocene
- †Saltenia (Reih 1959) Las Curtiembres Formation, Argentina, Late Cretaceous (Campanian)
However, a more recent analysis suggests that some of these taxa are only close relatives of Pipidae, but outside the crown-group. Furthermore, the composition of this crown clade (in terms of which extinct taxa are included) depends on whether or not the topology is constrained to reflect the molecular tree.[4]
References
edit- ^ "AmphibiaWeb: Pipidae". Berkeley, California: AmphibiaWeb. Retrieved 2009-10-25.
- ^ Zweifel, Richard G. (1998). Cogger, H.G.; Zweifel, R.G. (eds.). Encyclopedia of Reptiles and Amphibians. San Diego: Academic Press. pp. 86–87. ISBN 0-12-178560-2.
- ^ Báez, A. M.; Rage, J.-C. (1998). "Pipid frogs from the upper cretaceous of in beceten, niger". Palaeontology. 41 (4): 669–691.
- ^ a b Lemierre, Alfred; Bailon, Salvador; Folie, Annelise; Laurin, Michel (January 2023). "A new pipid from the Cretaceous of Africa (In Becetèn, Niger) and early evolution of the Pipidae". Journal of Systematic Palaeontology. 21 (1). Bibcode:2023JSPal..2166428L. doi:10.1080/14772019.2023.2266428. ISSN 1477-2019.
- ^ Jetz, Walter; Pyron, R. Alexander (May 2018). "The interplay of past diversification and evolutionary isolation with present imperilment across the amphibian tree of life". Nature Ecology & Evolution. 2 (5): 850–858. Bibcode:2018NatEE...2..850J. doi:10.1038/s41559-018-0515-5. ISSN 2397-334X. PMID 29581588.
- ^ Irisarri, Iker; Vences, Miguel; San Mauro, Diego; Glaw, Frank; Zardoya, Rafael (27 April 2011). "Reversal to air-driven sound production revealed by a molecular phylogeny of tongueless frogs, family Pipidae". BMC Evolutionary Biology. 11 (1): 114. Bibcode:2011BMCEE..11..114I. doi:10.1186/1471-2148-11-114. ISSN 1471-2148. PMC 3111386. PMID 21524293.
- ^ Pipidae at the Amphibian Species of the World 6.0 - AMNH
- ^ Evans, Ben J.; Carter, Timothy F.; Greenbaum, Eli; Gvoždík, Václav; Kelley, Darcy B.; McLaughlin, Patrick J.; Pauwels, Olivier S. G.; Portik, Daniel M.; Stanley, Edward L.; Tinsley, Richard C.; Tobias, Martha L.; Blackburn, David C. (16 December 2015). "Genetics, Morphology, Advertisement Calls, and Historical Records Distinguish Six New Polyploid Species of African Clawed Frog (Xenopus, Pipidae) from West and Central Africa". PLOS ONE. 10 (12): e0142823. doi:10.1371/journal.pone.0142823. ISSN 1932-6203. PMC 4682732. PMID 26672747.
- ^ Gómez, Raúl O. (July 2016). "A new pipid frog from the Upper Cretaceous of Patagonia and early evolution of crown-group Pipidae". Cretaceous Research. 62: 52–64. Bibcode:2016CrRes..62...52G. doi:10.1016/j.cretres.2016.02.006. hdl:11336/59544.
- ^ Rolando, Alexis M. Aranciaga; Agnolin, Federico L.; Corsolini, Julián (October 2019). "A new pipoid frog (Anura, Pipimorpha) from the Paleogene of Patagonia. Paleobiogeographical implications". Comptes Rendus Palevol. 18 (7): 725–734. Bibcode:2019CRPal..18..725R. doi:10.1016/j.crpv.2019.04.003. S2CID 197581931.
Bibliography
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- Ben J. Evans; et al. (2015). "Genetics, morphology, advertisement calls, and historical records distinguish six new polyploid species of African Clawed Frog (Xenopus, Pipidae) from West and Central Africa". PLoS One. 10 (12): 1–51. doi:10.1371/journal.pone.0142823. PMC 4682732. PMID 26672747.
- Gelfo, J.N.; Ortiz Jaureguizar, E.; Rougier, G.W. (2007). "New remains and species of the 'condylarth' genus Escribania (Mammalia: Didolodontidae) from the Palaeocene of Patagonia, Argentina". Earth and Environmental Science Transactions of the Royal Society of Edinburgh. 98 (2): 127–138. Bibcode:2007EESTR..98..127G. doi:10.1017/S1755691007006081 (inactive 1 November 2024). S2CID 86564613. Retrieved 2020-03-19.
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