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Acanthochelys radiolata (MIKAN, 1820)

IUCN Red List - Acanthochelys radiolata - Least Concern, LR
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Higher TaxaChelidae, Chelinae, Pleurodira, Testudines (turtles)
Subspecies 
Common NamesE: Brazilian Radiolated Swamp Turtle
G: STrahlen-Plattschildkröte
Portuguese: Cágado, Cágado-Amarelo, Cágado-Pescoço-de-Cobra. 
SynonymEmys radiolata MIKAN 1820: plate 20
Emys radiolata — WIED 1824
Platemys Gaudichaudii DUMÉRIL & BIBRON 1835: 427
Platemys Radiolata — DUMÉRIL & BIBRON 1835: 412
Hydraspis radiolata — BOULENGER 1889
Platemys werneri SCHNEE 1900: 463
Platemys radiolata — SIEBENROCK 1902
Platemys radiolata — SIEBENROCK 1904
Platemys radiolata quadrisquamosa LUEDERWALDT 1926
Platemys radiolata — ERNST 1983
Acanthochelys radiolata — IVERSON 1986
Platemys radiolata — ALDERTON 1988
Platemys radiolata — ERNST & BARBOUR 1989: 63
Acanthochelys radiolata — CASTRO & TEIXEIRA 2007
Acanthochelys radiolata — GARBIN et al. 2016
Acanthochelys radiolata — TTWG 2021 
DistributionBrazil (Bahia, Minas Gerais, Mato Grosso, Sao Paulo, Espírito Santo, Sergipe)

Type locality: "Sebastianopoli" (=Rio de Janeiro, Rio de Janeiro, Brazil).  
Reproductionoviparous. 
TypesHolotype: NMW 23390. 
DiagnosisAdditional details, e.g. a detailed description or comparisons (2241 characters), are available for collaborators and contributors. Please contact us for details. 
CommentA. radiolata represents one single polymorphic species with two color patterns for the carapace and three for the plastron.

Habitat: freshwater (rivers, swamps) 
EtymologyNamed after Latin radiolatum, provided with rays. (Mikan 1820, Esteban Lavilla, pers. comm., April 2024) 
References
  • Bérnils, Renato S.;Antônio de Pádua Almeida João Luiz Gasparini Ana Carolina Srbek-AraujoCarlos Frederico D. Rocha Miguel Trefaut Rodrigues 2014. RÉPTEIS NA RESERVA NATURAL VALE, LINHARES, ESPÍRITO SANTO, BRASIL. Ciência & Ambiente 49: 93-210 - get paper here
  • Bonin, F., Devaux, B. & Dupré, A. 2006. Turtles of the World. English translation by P.C.H. Pritchard. Johns Hopkins University Press, 416 pp.
  • Bour, R. 2008. Global diversity of turtles (Chelonii; Reptilia) in freshwater. Hydrobiologia 595:593–598 - get paper here
  • Bressan, Paulo Magalhães; Maria Cecília Martins Kierulff, Angélica Midori Sugieda (eds.) 2009. FAUNA AMEAÇADA DE EXTINÇÃO NO ESTADO DE SÃO PAULO: VERTEBRADOS. São Paulo: Fundação Parque Zoológico de São Paulo: Secretaria do Meio Ambiente, 2009. - get paper here
  • Castro, T.M. & Teixeira, R.L. 2007. Straßenverkehr als Bedrohung für die Amphibien und Reptilien des Atlantischen Regenwalds in Südost-Brasilien. Eine Fallstudie. Sauria 29 (2): 35-42 - get paper here
  • Duméril, A.M.C., and G. Bibron. 1835. Erpétologie Générale ou Histoire Naturelle Complète des Reptiles, Vol. 2. Librairie Encyclopédique de Roret, Paris, iv + 680 p. - get paper here
  • Ernst, C H 1983. Platemys radiolata (Mikan). Radiated sideneck turtle. Catalogue of American Amphibians and Reptiles ( 339: 1-2 - get paper here
  • Ernst, C H 1987. Platemys Wagler. Twistnecked turtles. Catalogue of American Amphibians and Reptiles ( 405: 1-4 - get paper here
  • Ernst,C.H. and Barbour,R.W. 1989. Turtles of the World. Smithsonian Institution Press, Washington D.C. - London
  • Freiberg, M.A. 1945. Una nueva especie de Tortuga del genero Platemys Wagler. Physis. Buenos Aires 20: 19-23
  • Freitas, Marco Antonio de; Arthur Diesel Abegg, Iuri Ribeiro Dias, Elbano Paschoal de Figueiredo Moraes 2018. Herpetofauna from Serra da Jibóia, an Atlantic Rainforest remnant in the state of Bahia, northeastern Brazil. Herpetology Notes 11: 59-72 - get paper here
  • Freitas, Marco Antonio de; Arthur Diesel Abegg, Thais Figueiredo Santos Silva, Patrícia Mendes Fonseca, Breno Hamdan, Thiago Filadelfo 2019. Herpetofauna of Serra do Timbó, an Atlantic Forest remnant in the State of Bahia, Northeastern Brazil. Herpetology Notes 12: 245-260 - get paper here
  • GARBIN, RAFAELLA C.; DEBORAH T. KARLGUTH, DANIEL S. FERNANDES, ROBERTA R. PINTO 2016. Morphological variation in the Brazilian Radiated Swamp Turtle Acanthochelys radiolata (Mikan, 1820) (Testudines: Chelidae) . Zootaxa 4105 (1): - get paper here
  • Garcia-Passos, Gabriel Oliveira; Milena Santos Soeiro, Rejâne Maria Lira-da-Silva 2018. Use of tomahawk traps in freshwater Testudines capture. Herpetology Notes 11: 285-289 - get paper here
  • Gemel, R.; G. Gassner & S. Schweiger 2019. Katalog der Typen der Herpetologischen Sammlung des Naturhistorischen Museums Wien – 2018. Ann. Naturhist. Mus. Wien, B 121: 33–248
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  • Huebinger, Ryan M.; John W. Bickham, Anders G. J. Rhodin, and Russell A. Mittermeier 2013. Mitochondrial DNA Corroborates Taxonomy of the South American Chelid Turtles of the Genera Platemys and Acanthochelys. Chelonian Conservation and Biology Jul 2013, Vol. 12, No. 1: 168-171. - get paper here
  • Iverson, J.B. 1986. A Checklist with Distribution Maps of the Turtles of the World. Paust Printing, Richmond, Indiana. viii + 282 pp.
  • Lourenço-de-Moraes, Ricardo, Felipe S Campos, Ana C Carnaval, Mileny Otani, Frederico G R França, Pedro Cabral, and Evanilde Benedito. 2021. No More Trouble: An Economic Strategy to Protect Taxonomic, Functional and Phylogenetic Diversity of Continental Turtles. Biological Conservation 261: 109241 - get paper here
  • MARQUES, O. A. V. et al. 2009. Repteis. In: Bressan et al., FAUNA AMEAÇADA DE EXTINÇÃO NO ESTADO DE SÃO PAULO: VERTEBRADOS. São Paulo: Fundação Parque Zoológico de São Paulo: Secretaria do Meio Ambiente, pp. 285-327 - get paper here
  • Mikan, J.C. 1820. Delectus Florae et Faunae Brasiliensis [...] Fasciculus Primus. Antonii Strauss. Wien. 54 pp. - get paper here
  • OLIVEIRA LIMA, JEFFERSON; HUGO ANDRADE, TAINARA LIMA DA SILVA & EDUARDO JOSÉ DOS REIS DIAS. 2022. Reptiles of Sergipe: current knowledge and sampling discontinuities. Herpetology Notes 15: 69–78. - get paper here
  • Oliveira, Jane C.F.; Rodrigo Castellari Gonzalez; Paulo Passos; Davor Vrcibradic & Carlos Frederico Duarte Rocha 2020. Non-Avian Reptiles of the state of Rio de Janeiro, Brazil: status of knowledge and commented list. Pap. Avulsos Zool. 60: e20206024 - get paper here
  • Rhodin, A.G.J., R. da Roche e Silva, and R.A. Mittermeier. 1984. Distribution of the South American chelid turtles Platemys radiolata and P. spixii. Copeia 1984 (3): 780-786 - get paper here
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  • ROCHA, CARLOS FREDERICO D.; HELENA G.BERGALLO, JOSÉ P. POMBAL JR., LENA GEISE, MONIQUE VAN SLUYS, RONALDO FERNANDES, ULISSES CARAMASCHI 2004. FAUNA DE ANFÍBIOS, RÉPTEIS E MAMÍFEROS DO ESTADO DO RIO DE JANEIRO, SUDESTE DO BRASIL. Publ. Avul. Mus. Nac., Rio de Janeiro (104): 3-23 - get paper here
  • Schiavetti, Alexandre; Tâmara Saloes Batista, Everton Sousa Ferreira, Mirco K. Solé 2021. Brazilian Radiolated Swamp Turtle Acanthochelys radiolata (Mikan, 1820) in rivers of the Atlantic Forest of southern Bahia, Brazil. Herpetology Notes 14: 609-612
  • Schnee 1900. Über eine Sammlung südbrasilianischer Reptilien und Amphibien, nebst Beschreibung einer neuen Schildkröte. Zool. Anz. 23: 461-464 - get paper here
  • Siebenrock, F. 1902. Über zwei seltene Schildkroten der herpetologischen Sammlung des Wiener Museums. Anzeiger der Kaiserlichen Akademie der Wissenschaften, Mathematisch-Naturwissenschaftliche Classe, Wien 39: 11-13 - get paper here
  • Silva-Soares, T.; R.B. Ferreira; R.O.L. Salles; C.F.D. Rocha. 2011. Continental, insular and coastal marine reptiles from the municipality of Vitória, state of Espírito Santo, southeastern Brazil. Check List 7 (3): 290-298 - get paper here
  • SOUSA, B.M., NASCIMENTO, A.E.R., GOMIDES, S.C., VARELA RIOS, C.H., HUDSON, A.H. & NOVELLI, I.A. 2010. Reptiles in fragments of Cerrado and Atlantic Forest at the Campo das Vertentes, Minas Gerais State, Southeastern Brazil. Biota Neotropica 10 (2): 129-138 - get paper here
  • Souza, Franco L. 2004. Uma revisão sobre padrões de atividade, reprodução e alimentação de cágados brasileiros (Testudines, Chelidae) [A review on activity patterns, reproduction, and feeding habits in Brazilian chelid turtles (Testudines, Chelidae)]. Phyllomedusa 3 (1): 15-28 - get paper here
  • Souza, Franco; João Rodrigues, Miguel Olalla-Tárraga, José Diniz-Filho, Pablo Martinez and Ricardo J. Sawaya 2019. Niche divergence and diversification in South American freshwater turtles of the genus Acanthochelys (Chelidae). Amphibia-Reptilia 40 (4): 475–485 - get paper here
  • TTWG; Rhodin, A.G.J., Iverson, J.B., Bour, R., Fritz, U., Georges, A., Shaffer, H.B., and van Dijk, P.P. 2021. Turtles of the World: Annotated Checklist and Atlas of Taxonomy, Synonymy, Distribution, and Conservation Status (9th Ed.). In: Rhodin, A.G.J., Iverson, J.B., van Dijk, P.P., Stanford, C.B., Goode, E.V., Buhlmann, K.A., and Mittermeier, R.A. (Eds.). Chelonian Research Monographs 8:1–472. doi:10.3854/crm.8.checklist.atlas.v9.2021. - get paper here
  • Valenzuela, N. 2009. Co-Evolution of Genomic Structure and Selective Forces Underlying Sexual Development and Reproduction. Cytogenet Genome Res 127: 232-241 - get paper here
  • Wied-Neuwied, M. 1824. Verzeichniss der Amphibien, welche im zweyten Bande der Naturgeschichte Brasiliens vom Prinz Max von Neuwied werden beschrieben werden. Isis von Oken 14: 661—673 [columns] - get paper here
  • Zaher, Hussam; Fausto Erritto BarboI; Paola Sanchez Martínez; Cristiano Nogueira; Miguel Trefaut Rodrigues; Ricardo Jannini Sawaya 2011. Répteis do Estado de São Paulo: conhecimento atual e perspectivas. Biota Neotropica, 11 (1): 1–15. - get paper here
  • Zocca, C Z; Nóbrega, Y C; Acosta, I C L; Martins, T F & Ferreira, R B; 2019. Acanthochelys radiolata (Brazilian Radiolated Swamp Turtle) Ectoparasites. Herpetological Review 50 (3): 552-553 - get paper here
 
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