Biology:Eodiscoglossus

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Short description: Extinct genus of amphibians

Eodiscoglossus
Temporal range: Early Cretaceous Barremian
Eodiscoglossus.png
Holotype specimen of E. santonjae
Scientific classification e
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Amphibia
Order: Anura
Genus: Eodiscoglossus
Villalta, 1957
Type species
Eodiscoglossus santonjae
Villalta, 1957
Other species
  • Eodiscoglossus oxoniensis? Evans et al., 1990

Eodiscoglossus is an extinct genus of prehistoric frogs. It is known from the type species E. santonjae from the Early Cretaceous (Barremian) El Castellar Formation of Spain , as well as a referred species E. oxoniensis known from the Forest Marble Formation of the UK.[1][2][3] It was a small primitive frog, with a length of only 27 mm (1.1 in) from the premaxilla to the ischium.[2] Formerly considered to be closely related to discoglossids, E. santonjae is now regarded as close to the root of the crown group of modern frogs[3] in a position more derived than New Zealand frogs and tailed frogs, but more basal than costatans like alytids and other more advanced frogs like neobatrachians. The morphology of E. santonjae suggests a generalist and unspecialised movement habit.[4] The referral of E. oxoniensis to Eodiscoglossus has been questioned, as it is much earlier than the type species and it is based on homoplasic and plesiomorphic characteristics inherited from a common ancestor, so there is no clear evidence of a close relation.[5]

See also

  • Prehistoric amphibian
  • List of prehistoric amphibians

References

  1. "†Eodiscoglossus Villalta 1957". Paleobiology Database. Fossilworks. http://www.fossilworks.org/cgi-bin/bridge.pl?a=taxonInfo&taxon_no=37428. 
  2. 2.0 2.1 Hecht, Max K. (1970). "The morphology of Eodiscoglossus, a complete Jurassic frog". American Museum Novitates (2424): 1–17. 
  3. 3.0 3.1 Báez, Ana Maria; Gómez, Raúl O. (2016). "Revision of the skeletal morphology of Eodiscoglossus santonjae, an Early Cretaceous frog from northeastern Spain, with comments on its phylogenetic placement". Fossil Imprint 72 (1–2): 67–77. doi:10.14446/fi.2016.67. ISSN 2533-4069. 
  4. Gómez, Raúl O.; Lires, Andres I. (October 2019). "High ecomorphological diversity among Early Cretaceous frogs from a large subtropical wetland of Iberia" (in en). Comptes Rendus Palevol 18 (7): 711–723. doi:10.1016/j.crpv.2019.07.005. https://linkinghub.elsevier.com/retrieve/pii/S1631068319301320. 
  5. Báez, Ana M.; Gómez, Raúl O. (2019). "Redescription of the overlooked basal frog Wealdenbatrachus reveals increased diversity among Early Cretaceous anurans" (in en). Cretaceous Research 99: 14–29. doi:10.1016/j.cretres.2019.02.006. 

Wikidata ☰ Q5381657 entry