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Amphisbaena hiata MONTERO & CÉSPEDEZ, 2002

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Higher TaxaAmphisbaenidae, Amphisbaenia, Lacertoidea, Squamata (lizards)
Common Names 
SynonymAmphisbaena hiata MONTERO & CÉSPEDEZ 2002
Amphisbaena dubia YANOSKY et al. 1993a,b
Amphisbaena dubia MONTERO 1994, 1996
Amphisbaena dubia MONTERO and TEROL 1999
Amphisbaena hiata — GANS 2005: 15
Amphisbaena hiata — COSTA et al. 2019 
DistributionArgentina (Formosa, Corrientes), Brazil

Type locality: Laguna Brava (27° 30’ S, 58° 43’ W), Capital Department, Corrientes Province, Argentina.  
TypesHolotype: UNNE (= UNNEC) 1043 (Universidad Nacional del Nordeste, Corrientes) 
DiagnosisDiagnosis. A small form of Amphisbaena without major fusion of head shields; with one pair of large parietals and enlarged occipitals; a blunt-tipped cylindrical tail with a faint autotomy annulus at the eighth caudal annulus; two cicatricial precloacal pores separated by a pair of nonpored medial scales (hiatus), or without pores. Specimens have 202 to 213 body annuli; 18 to 19 caudal annuli; 16 to 17 dorsal and 18 to 22 ventral segments to the midbody annulus; one or two rows of postgenials and a postmalar row. The color of preserved specimens is light brown with the ventral region cre`me white, similar to that of live specimens (following Gans and Alexander, 1962). 
CommentHas been confused previously with A. dubia by Yanosky et al. 1993, Montero 1994, and others.

Morphology: This species is one of ~20 species of Amphisbaena with two precloacal pores (Ribeiro et al. 2019). 
EtymologyNamed after the Latin word hiatus, meaning gap, in reference to the gap between the precloacal pores, which is a distinctive characteristic of this species. 
  • AVILA, LUCIANO JAVIER; LORENA ELIZABETH MARTINEZ & MARIANA MORANDO 2013. Checklist of lizards and amphisbaenians of Argentina: an update. Zootaxa 3616 (3): 201–238 - get paper here
  • Costa, Henrique C.; Sofia Velasquez, Hussam Zaher, Paulo C.A. Garcia 2019. Updated Diagnosis of Amphisbaena metallurga and A. sanctaeritae and First Record of A. hiata in Brazil (Squamata: Amphisbaenidae). South American J. Herp. 14 (3): 233-241 - get paper here
  • Falcione, Camila and Alejandra Hernando 2010. A new karyotypic formula for the genus Amphisbaena (Squamata: Amphisbaenidae). Phyllomedusa 9 (1): 75-80 - get paper here
  • Gallardo, José M. 1969. Las especies de saurios (Reptilia) de la Provincia de Santa Fe, Argentina, y consideraciones sobre su ecologia y zoogeografia. Neotropica 15 (47): 73-81
  • Gans, C. 2005. CHECKLIST AND BIBLIOGRAPHY OF THE AMPHISBAENIA OF THE WORLD. Bull. Am. Mus. Nat. Hist. 289: 1-130 - get paper here
  • Montero, R. 1994. Distribución de los Amphisbaenidae en la República Argentina. Bol. Asoc. Herp. Argentina 10 (1): 43-46
  • Montero, R. 1996. Lista de localidades de Amphisbaenia de la República Argentina. Cuadernos de Herpetología 10: 25–45 - get paper here
  • Montero, R. AND G. J. TEROL 1999. Los Amphisbaenidae en Paraguay, listado geográfico. Cuadernos de Herpetología 13:89–95. - get paper here
  • Montero, Ricardo and Jorge Céspedez 2002. New two-pored Amphisbaena (Squamata: Amphisbaenidae) from Argentina. Copeia 2002 (3): 792-797 - get paper here
  • RIBEIRO, SÍRIA; JERRIANE O. GOMES, HELDER LÚCIO RODRIGUES DA SILVA, CARLOS EDUARDO D. CINTRA, NELSON JORGE DA SILVA JR. 2016. A new two-pored species of Amphisbaena (Squamata, Amphisbaenidae) from the Brazilian Cerrado, with a key to the two-pored species of Amphisbaena. Zootaxa 4147 (2): 124–142 - get paper here
  • RIBEIRO, SÍRIA; VÂNIA SÁ, ALFREDO P. SANTOS-JR, ROBERTA GRABOSKI, HUSSAM ZAHER, ANDREI G. GUEDES, SHEILA P. ANDRADE, WILIAN VAZ-SILVA 2019. A new species of the Amphisbaena (Squamata, Amphisbaenidae) from the Brazilian Cerrado with a key for the two-pored species. Zootaxa 4550 (3): 301–320 - get paper here
  • Teixeira, Mauro; Francisco Dal Vechio, Antonio Mollo Neto, and Miguel Trefaut Rodrigues 2014. A New Two-Pored Amphisbaena Linnaeus, 1758, from Western Amazonia, Brazil (Amphisbaenia: Reptilia). South American J. Herp. 9 (1): 62-74. - get paper here
  • Yanosky A Alberto. Dixon James R. Mercolli Claudia 1993. First record of Amphisbaena dubia Muller (Reptilia: Amphisbaenia) in Argentina. Bull. Maryland Herp. Soc. 29 (2): 47-50 - get paper here
  • Yanosky, A. Alberto;Dixon, James R.;Mercolli, Claudia 1993. The Herpetofauna of el Bagual Ecological Reserve (Formosa, Argentina) with comments on its herpetological collection. Bull. Maryland Herp. Soc. 29 (4): 160-171 - get paper here
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