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Amphisbaena xera THOMAS, 1966

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Higher TaxaAmphisbaenidae, Amphisbaenia, Lacertoidea, Squamata
Subspecies 
Common NamesE: Puerto Rican Xeric Wormlizard, Dry Worm Lizard 
SynonymAmphisbaena xera THOMAS 1966: 7
Amphisbaena xera — SCHWARTZ & HENDERSON 1991: 562
Amphisbaena xera — GANS 2005: 21 
DistributionPuerto Rico, Isla Caja de Muertos

Type locality: 7 km E Guánica, 600 ft. elevation, Puerto Rico.  
Reproductionoviparous 
TypesHolotype: MCZ 81019. 
DiagnosisDESCRIPTION: Size moderate (SVL to 245 mm); tail to 20 mm, tapered, not so cylindrical or rounded terminally as in other species; caudal autotomy between 5-7 caudal annuli; body annuli 225-234, caudal annuli 10-16; dorsal segments 12-16/midbody annulus, ventral segments 14-16/midbody annulus; rows of post-genials 2-3; no postmalar chin shields; 2-4 (strongly modally 4) precloacal pores; nasal suture long, one-third to one-half prefrontal suture; 1 temporal. Dorsum pale tan, more brown toward head and tail; venter pink (due to superficial vascularity); dark ventral pigmentation almost absent in ventralmost 4 rows; dropping out of pigmented ventral segments occurs but is not obvious because all ventral pigmentation fades; temporal region deep, reddish purple; snout and posterior one-half of edge of lower jaw buffy (Schwartz & Henderson 1991: 562). 
CommentIllustrations: Thomas, 1966; Rivero, 1978. 
References
  • Falcione, Camila and Alejandra Hernando 2010. A new karyotypic formula for the genus Amphisbaena (Squamata: Amphisbaenidae). Phyllomedusa 9 (1): 75-80 - get paper here
  • Gans, C. 2005. CHECKLIST AND BIBLIOGRAPHY OF THE AMPHISBAENIA OF THE WORLD. Bull. Am. Mus. Nat. Hist. 289: 1-130 - get paper here
  • Gans, C., G.C. Huang & H.F. Clark 1967. The Diphyletism of the Amphisbaenia (Reptilia): A Re-Evaluation Based upon Chromosome Counts Copeia 1967 (2): 485-487. - get paper here
  • Rivero, J.A. 1978. Los anfibios y reptiles de Puerto Rico. M. Pareja Montana, 16, Barcelona, Espafia: x + 152 + 148pp.
  • Schwartz, A. & Henderson, R.W. 1991. Amphibians and Reptiles of the West Indies. University of Florida Press, Gainesville, 720 pp.
  • Thomas, R. 1966. Additional notes on the amphisbaenids of Greater Puerto Rico. Breviora (249):1-23. - get paper here
 
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