El editor solo permite decargar el artículo en su versión post-print desde el repositorio. Por favor, si usted posee dicha versión, enviela a
Consulte el artículo en la página del editor
Consulte la política de Acceso Abierto del editor


The anuran Wealdenbatrachus jucarensis Fey, 1988 is represented by several specimens, each consisting of an association of disarticulated bones preserved on slabs from a lignite mine near the village of Uña, Cuenca Province, Spain, from which remains of plants and other vertebrates also have been recovered. The bearing unit, La Huérguina Formation, is estimated to be late Barremian in age. Originally these anuran specimens were considered to represent a crown-group costatan closer to the living Discoglossus than to Alytes or Bombina. Herein we redescribe this material, including some hitherto unknown skeletal elements, such as nasal and atlas, and reinterpreting other elements, such as pterygoid and squamosal. Our observations and comparisons led us to validate this taxon and to present an updated restoration. It is noteworthy that several characters that have been used to ally Wealdenbatrachus with the early Barremian Eodiscoglossus santonjae occur widely in basal frogs, thus probably being plesiomorphic at this phylogenetic level, and contrast sharply with the conditions in living costatans. Available information points to a position of W. jucarensis outside the node that unites crown-group costatans, as a relatively basal taxon within Anura. © 2019


Documento: Artículo
Título:Redescription of the overlooked basal frog Wealdenbatrachus reveals increased diversity among Early Cretaceous anurans
Autor:Báez, A.M.; Gómez, R.O.
Filiación:CONICET–Departamento de Ciencias Geológicas, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón 2, Buenos Aires, 1428, Argentina
Museo Argentino de Ciencias Naturales, Sección Paleontología de Vertebrados, Av. Angel Gallardo 470, Buenos Aires, 1405, Argentina
Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón 2, Buenos Aires, 1428, Argentina
Palabras clave:Anura; Barremian; Iberian Plate; La Huérguina Formation; Anura; Vertebrata
Página de inicio:14
Página de fin:29
Título revista:Cretaceous Research
Título revista abreviado:Cretaceous Res.


  • Averianov, A.O., Martin, T., Skutchas, P.P., Rezviss, A.S., Bakirov, A.A., Amphibians from the Middle Jurassic Balabansai Svita in the Fergana Depression, Kyrgyzstan (Central Asia) (2008) Palaeontology, 51, pp. 471-485
  • Báez, A.M., Anurans from the Early Cretaceous Lagerstätte of Las Hoyas, Spain: new evidence on the Mesozoic diversification of crown-clade Anura (2013) Cretaceous Research, 41, pp. 90-106
  • Báez, A.M., Basso, N.G., The earliest known frogs of the Jurassic of South America: review and cladistic appraisal of their relationships (1996) Münchner Geowissenschaftliche Abhandlungen, 30, pp. 131-158
  • Báez, A.M., Gómez, R.O., Revision of the skeletal morphology of Eodiscoglossus santonjae an early Cretaceous frog from northeastern Spain, with comments on its phylogenetic placement (2016) Fossil Imprint, 72, pp. 67-77
  • Báez, A.M., Gómez, R.O., Systematic Reassessment of the Late Barremian Frog Wealdenbatrachus jucarensis, Iberian Ranges, Eastern Spain. Abstract Book of the XVI Annual Meeting of the European Association of Vertebrate Palaeontology, Caparica, Facultade de Ciência e Tecnologia (2018), p. 18. , Universidade Nova de Lisboa Portugal June 26 th -July 1 st 2018; Báez, A.M., Gómez, R.O., Dealing with homoplasy: osteology and phylogenetic relationships of the bizarre neobatrachian frog Baurubatrachus pricei from the Upper Cretaceous of Brazil (2018) Journal of Systematic Palaeontology, 16, pp. 279-308
  • Báez, A.M., Nicoli, L., A new look at an old frog: the Jurassic Notobatrachus Reig from Patagonia (2004) Ameghiniana, 41, pp. 257-270
  • Báez, A.M., Sanchíz, B., A review of Neusibatrachus wilferti, an Early Cretaceous frog from the Montsec Range, northeastern Spain (2007) Acta Palaeontologica Polonica, 52, pp. 477-487
  • Báez, A.M., Gómez, R.O., Taglioretti, M., The archaic ilial morphology of an enigmatic pipid frog from the upper Pleistocene of the South American pampas (2012) Journal of Vertebrate Paleontology, 32, pp. 304-314
  • Biton, R., Geffen, E., Vences, M., Cohen, O., Bailon, S., Rabinovich, R., Malka, Y., Gafny, S., The rediscovered Hula painted frog is a living fossil (2013) Nature Communications, 4, p. 1959
  • Biton, R., Boistel, R., Rabinovich, R., Gafny, S., Brumfeld, V., Bailon, S., Osteological observations on the Alytid Anura Latonia nigriventer with comments on functional morphology, biogeography, and evolutionary history (2016) Journal of Morphology, 277, pp. 1131-1145
  • Blackburn, D.C., Bickford, D.P., Diesmos, A.C., Iskandar, D.T., Brown, R.M., An ancient origin for the enigmatic flat-headed frogs (Bombinatoridae: Barbourula) from the islands of Southeast Asia (2010) PLoS One, 5, pp. 1-10
  • Blanco, M.J., Sanchíz, B., Evolutionary mechanisms of rib loss in anurans: a comparative developmental approach (2000) Journal of Morphology, 244, pp. 57-67
  • Bolkay, S.J., Osnove uporedne osteologije anurskih batrahija sa dodatkom o porijeklu Anura i sa slikom narajnova sistema istih (1919) Glasnik Zemaljskov Muzeja Bosni Herzegovini, 31, pp. 277-353
  • Clarke, B.T., Evolutionary Relationships of the Discoglossoid Frogs–Osteolological Evidence (1988), p. 431. , Unpubl. PhD. thesis British Museum of Natural History and City of London Polytechnic London; Clarke, B.T., Comparative morphology and amphibian taxonomy: an example from the osteology of the discoglossoid frogs (2007) Amphibian Biology, pp. 2465-2612. , H. Heatwole M. Tyler Surrey Beatty and Sons Chipping Norton
  • De Vicente, A., Martín-Closas, C., Lower Cretaceous charophytes from the Serranía de Cuenca, Iberian Chain: taxonomy, biostratigraphy and palaeoecology (2013) Cretaceous Research, 40, pp. 227-242
  • Dong, L., Roček, Z., Wang, Y., Jones, M.E.H., Anurans from the Lower Cretaceous Jehol Group of Western Liaoning, China (2013) PLoS One, 8, p. e69723
  • Duellman, W.E., Trueb, L., Biology of Amphibians (1986), McGraw–Hill Inc New York; Estes, R., Reig, O.A., The early fossil record of frogs: a review of the evidence (1973) Evolutionary Biology of the Anurans. Contemporary Research on Major Problems, pp. 11-36. , J.L. Vial University of Missouri Press Columbia
  • Estes, R., Sanchíz, B., Early Cretaceous lower vertebrates from Galve (Teruel), Spain (1982) Journal of Vertebrate Paleontology, 2, pp. 21-39
  • Evans, S.E., Milner, A.R., Mussett, F., A discoglossid frog from the Middle Jurassic of England (1990) Palaeontology, 33, pp. 299-311
  • Fey, B., Die Anurenfauna aus der Unterkreide von Uña (Ostspanien) (1988) Berliner Geowissenschaftliche Abhandlungen Reihe A/Band, 103, pp. 1-99
  • Folie, A., Rana, R.S., Rose, K.D., Sahni, A., Kumar, K., Singh, L., Smith, T., Early Eocene frogs from Vastan lignite mine, Gujarat, India (2013) Acta Palaeontologica Polonica, 58, pp. 511-524
  • Ford, L.S., Cannatella, D.C., The major clades of frogs (1993) Herpetological Monographs, 7, pp. 94-117
  • Fregenal-Martínez, M., Meléndez, N., Muñoz-García, M.B., Elez, J., De la Horra, R., The stratigraphic record of the late Jurassic-early Cretaceous in the Alto Tajo, Serranía de Cuenca region (Iberian Ranges, Spain): genetic and structural evidences for evidences and a new lithostratigraphical proposal (2017) Revista de la Sociedad Geologica de Espana, 30, pp. 113-142
  • Frost, D.R., Amphibian Species of the World: an Online Reference. Vers. 6.0 (19 August 2018) (2018),, American Museum of Natural History New York Electronic database accessible at; Frost, D.R., Grant, T., Faivovich, J., Bain, R.H., Haas, A., Haddad, C.F.B., de Sá, R.O., Wheeler, W.C., The Amphibian tree of life (2006) Bulletin of the American Museum of Natural History, 297, pp. 1-370
  • Gao, K.Q., Chen, J., A new crown-group frog (Amphibia: Anura) from the Early Cretaceous of northeastern Inner Mongolia, China (2017) American Museum Novitates, 3876, pp. 1-39
  • Gómez, R.O., A new pipid frog from the Upper Cretaceous of Patagonia and early evolution of crown-group Pipidae (2016) Cretaceous Research, 62, pp. 52-64
  • Gómez, R.O., Turazzini, G.F., An overview of the ilium of anurans (Lissamphibia, Salientia), with a critical appraisal of the terminology and primary homology of main ilial features (2016) Journal of Vertebrate Paleontology, 36, p. e1030023
  • Gomez, B., Martin-Closas, C., Méon, H., Thévenard, F., Barale, G., Plant taphonomy and palaeoecology in the lacustrine Uña delta (Late Barremian, Iberian Ranges, Spain) (2001) Palaeogeography, Palaeoclimatology, Palaeoecology, 170, pp. 133-148
  • Gomez, B., Daviero-Gomez, V., Coiffard, C., Martín-Closas, C., Dilcher, D.L., Montsechia, an ancient aquatic angiosperm (2015) Proceedings of the National Academy of Sciences, 112, pp. 10985-10988
  • Griffiths, I., The phylogeny of the Salientia (1963) Biological Reviews, 38, pp. 241-292
  • Grigorescu, D., Vencsel, M., Csiki, Z., Limberea, R., New latest Cretaceous microvertebrate fossil assemblages from the Hateg Basin, Romania (1999) Geologie en Mijnbouw, 78, pp. 301-314
  • Günther, A., On the systematic arrangement of the tailess batrachians and the structure of Rhinophrynus dorsalis (1858) Proceedings of the Zoological Society of London, 26, pp. 339-352
  • Haas, A., Phylogeny of frogs as inferred from primarily larval characters (Amphibia: Anura) (2003) Cladistics, 19, pp. 23-89
  • Hecht, M.K., The Morphology of Eodiscoglossus, a complete Jurassic Frog (1970) American Museum Novitates, 2424, pp. 1-17
  • Inger, R.F., The development of a phylogeny of frogs (1967) Evolution, 21, pp. 369-384
  • Jenkins, F., Shubin, N., Prosalirus bitis and the anuran caudopelvic mechanism (1998) Journal of Vertebrate Paleontology, 18, pp. 495-510
  • Jones, M.E.H., Evans, S.E., Sigogneau-Russell, D., Early Cretaceous frogs from Morocco (2003) Annals of Carnegie Museum, 72, pp. 65-97
  • Kluge, A.G., Farris, J.S., Quantitative phyletics and the evolution of Anurans (1969) Systematic Biology, 18, pp. 1-32
  • Lataste, F., Étude sur le Discoglossus pictus Otth (1879) Actes de la Societe Linneenne de Bordeaux – Serie A, 4 (3), pp. 275-342
  • Lires, A.I., Soto, I., Gómez, R.O., Walk before you jump: new insights on frog locomotion from the oldest known salientian (2016) Palaeobiology, 42, pp. 612-623
  • Moffat, L.A., The development and adult structure of the vertebral column in Leiopelma (Amphibia: Anura) (1974) Proceedings of the Linnean Society of New South Wales, 98, pp. 142-178
  • Mookerjee, H.K., On the development of the vertebral column in Anura (1931) Philosophical Transactions of the Royal Society of London B, 219, pp. 165-196
  • Přikryl, T., Aerts, P., Havelková, P., Herrel, A., Roček, Z., Pelvic and thigh musculature in frogs (Anura) and origin of anuran jumping locomotion (2009) Journal of Anatomy, 214, pp. 100-139
  • Pyron, R.A., Biogeographic analysis reveals ancient continental vicariance and recent oceanic dispersal in amphibians (2014) Systematic Biology, 63, pp. 779-797
  • Rage, J.-C., Vergnaud-Grazzini, C., Position systématique de Diplopelturus ruscinensis Depéret (Amphibia, Anura) (1972) Bulletin du Muséum national d'Historie Naturelle, 73, pp. 83-87
  • Ritland, R.M., Studies on the post-cranial morphology of Ascaphus truei. 1. Skeleton and spinal nerves (1955) Journal of Morphology, 97, pp. 119-177
  • Roček, Z., Taxonomy and distribution of Tertiary discoglossids of the genus Latonia V. Meyer, 1843 (Anura) (1994) Geobios, 27, pp. 717-751
  • Roček, Z., Larval development and evolutionary origin of the Anuran skull (2003) Amphibian Biology 5, pp. 1878-1995. , H. Heatwole M. Davies Surrey Beatty and Sons Chipping Norton
  • Roček, Z., The Late Cretaceous frog Gobiates from Central Asia: its evolutionary status and possible phylogenetic relationships (2008) Cretaceous Research, 29, pp. 577-591
  • Roček, Z., Mesozoic and Tertiary Anura from Laurasia (2013) Palaeobiodiversity and Palaeoenvironments, 93, pp. 397-439
  • Roček, Z., Přikryl, T., Baleeva, N., Vazeille, A., Boistel, R., Bravin, A., Nemoz, C., Claessens, L., Contribution to the head anatomy of the basal frog Barbourula busuangensis and the evolution of the Anura (2016) Russian Journal of Herpetology, 23, pp. 163-194
  • Sanchíz, B., Nota preliminar sobre los anuros infracretácicos de Las Hoyas (Cuenca). Actas III Curso de Paleontología (1991), Instituto Juan de Valdes and Universidad Internacional Menendez Pelayo, Cuenca; Sanchíz, B., Salientia (1998) Encyclopedia of Palaeoherpetology, pp. 1-275. , P. Wellnhofer Verlag Dr. Friedrich Pfeil München
  • Shubin, N.H., Jenkins, F.A., An Early Jurassic jumping frog (1995) Nature, 377, pp. 49-52
  • Skutchas, P.P., Martin, T., Krasnolutskii, S.A., First Jurassic frog from Siberia, Russia (2016) Journal of Vertebrate Paleontology, 36, p. e1101376
  • Szentesi, Z., Venczel, M., A new discoglossid frog from the Upper Cretaceous (Santonian) of Hungary (2012) Cretaceous Research, 34, pp. 327-333
  • Trueb, L., Bones, frogs and evolution (1973) Evolutionary Biology of the Anurans. Contemporary Research on Major Problems, pp. 65-132. , J.L. Vial University of Missouri Press Columbia
  • Venczel, M., Csiki, Z., New frogs from the latest Cretaceous Haţeg Basin, Romania (2003) Acta Palaeontologica Polonica, 48, pp. 609-616
  • Vergnaud-Grazzini, C., Wenz, S., Les discoglossidés du Jurassique Supérieur du Montsech (Province de Lérida, Espagne) (1975) Annales de Paléontologie (Vertebres), 61, pp. 19-36
  • de Villalta, J.F., Novedades paleomastológicas desde el último cursillo (1952). II Cursillo Internacional Paleontología (1954), Museo de Sabadell Sabadell; Vissers, R.L.M., van Hinsbergen, D.J.J., van der Meer, D.G., Spakman, W., Cretaceous slab break-off in the Pyrinees: Iberian Plate kinematics in paleomagnetic and mantle reference frames (2016) Gondwana Research, 34, pp. 49-59
  • Wang, Y., Gao, K.-Q., Earliest Asian discoglossid from western Liaoning (1999) Chinese Science Bulletin, 44, pp. 636-642
  • Worthy, T.H., Osteology of Leiopelma (Anura: Leiopelmatidae) and descriptions of three new subfossil Leiopelma species (1987) Journal of the Royal Society of New Zealand, 17, pp. 201-251
  • Xing, L., Stanley, E.L., Bal, M., Blackburn, D.C., The earliest direct evidence of frogs in wet tropical forests from Cretaceous Burmese amber (2018) Scientific Reports, 8, p. 8770


---------- APA ----------
Báez, A.M. & Gómez, R.O. (2019) . Redescription of the overlooked basal frog Wealdenbatrachus reveals increased diversity among Early Cretaceous anurans. Cretaceous Research, 99, 14-29.
---------- CHICAGO ----------
Báez, A.M., Gómez, R.O. "Redescription of the overlooked basal frog Wealdenbatrachus reveals increased diversity among Early Cretaceous anurans" . Cretaceous Research 99 (2019) : 14-29.
---------- MLA ----------
Báez, A.M., Gómez, R.O. "Redescription of the overlooked basal frog Wealdenbatrachus reveals increased diversity among Early Cretaceous anurans" . Cretaceous Research, vol. 99, 2019, pp. 14-29.
---------- VANCOUVER ----------
Báez, A.M., Gómez, R.O. Redescription of the overlooked basal frog Wealdenbatrachus reveals increased diversity among Early Cretaceous anurans. Cretaceous Res. 2019;99:14-29.