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Amphisbaena stejnegeri RUTHVEN, 1922

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Higher TaxaAmphisbaenidae, Amphisbaenia, Lacertoidea, Squamata
Subspecies 
Common NamesE: Stejneger's Worm Lizard 
SynonymAmphisbaena stejnegeri RUTHVEN 1922
Amphisbaena stejnegeri— HOOGMOED & AVILA-PIRES 1991
Amphisbaena stejnegeri — GANS 2005: 20 
DistributionGuyana (Demerara, coast)

Type locality: British Guyana; Demerara, Vreed en Rust (06°27’N, 58°19’W).  
Reproductionoviparous 
TypesHolotype: UMMZ 55858 
DiagnosisDIAGNOSIS: A form ofAmphisbaena with the mental and postmental fused; with the nasals the largest segments on the head [and the frontals scarcely distinguished; with the oculars split to form triangular infraoculars equal in size to the oculars]; and three supralabials and two infralabials. The form has 247 [243] body annuli; nine caudal annuli up to the autotomy constriction (at which the tail is autotomized); 17 to 18 [19] dorsal and 16 [20] ventral segments to a midbody annulus; and six precloacal pores. The color of preserved specimens is yelowish,with an irregular dorsal scatering of individual dark segments [the frequency of dark segments is suficiently high on the midbody dorsal surface to yield the impression of a scatering of light segments on a dark background], thinning out anteriorly toward an immaculate head.The anterior half of some [most] infracaudal segments is strongly pigmented, while the infracaudal segments of the ninth postcloacal annulus are entirely pigmented (Gans 1963: 5) 
CommentDistribution: map in HOOGMOED & AVILA-PIRES 1991.

Abundance: only known from its original description (Meiri et al. 2017). 
EtymologyNamed after Leonhard Hess Stejneger (1851-1943), Norwegian-born herpetologist who moved to the US in 1881 and became curator of reptiles at the Smithsonian Institution in 1889. 
References
  • Beolens, Bo; Michael Watkins, and Michael Grayson 2011. The Eponym Dictionary of Reptiles. Johns Hopkins University Press, Baltimore, USA - get paper here
  • Cole, Charles J.; Carol R. Townsend, Robert P. Reynolds, Ross D. MacCulloch, and Amy Lathrop 2013. Amphibians and reptiles of Guyana, South America: illustrated keys, annotated species accounts, and a biogeographic synopsis. Proceedings of the Biological Society of Washington 125 (4): 317-578; plates: 580-620 - get paper here
  • Gans, C. 1963. Notes on amphisbaenids (Amphisbaenia, Reptilia). 8. A redescription of Amphisbaena stejnegeri and the description of a new species of Amphisbaena from British Guiana. American Museum Novitates (2128): 1-18. - get paper here
  • Gans, C. 2005. CHECKLIST AND BIBLIOGRAPHY OF THE AMPHISBAENIA OF THE WORLD. Bull. Am. Mus. Nat. Hist. 289: 1-130
  • Hoogmoed M.S.; de Avila-Pires T C S 1991. A new species of small Amphisbaena (Reptilia: Amphisbaenia: Amphisbaenidae) from western Amazonian Brazil. BOLETIM DO MUSEU PARAENSE EMILIO GOELDI SERIE ZOOLOGIA 7 (1): 77-94
  • Hoogmoed, Marinus S.; Roberta R. Pinto, Wáldima Alves da Rocha, and Emiliane G. Pereira 2009. A NEW SPECIES OF MESOBAENA MERTENS, 1925 (SQUAMATA: AMPHISBAENIDAE) FROM BRAZILIAN GUIANA, WITH A KEY TO THE AMPHISBAENIDAE OF THE GUIANAN REGION. Herpetologica 65 (4): 436 - get paper here
  • Meiri, Shai; Aaron M. Bauer, Allen Allison, Fernando Castro-Herrera, Laurent Chirio, Guarino Colli, Indraneil Das, Tiffany M. Doan, Frank Glaw, Lee L. Grismer, Marinus Hoogmoed, Fred Kraus, Matthew LeBreton, Danny Meirte, Zoltán T. Nagy, Cristiano d 2017. Extinct, obscure or imaginary: the lizard species with the smallest ranges. Diversity and Distributions - get paper here
  • Ruthven, ALEXANDER C. 1922. A new species of Amphisbaena from British Guiana. Occas. Pap. Mus. Zool. Univ. Michigan, (122): 1-2.
  • Vanzolini, P.E. 2002. AN AID TO THE IDENTIFICATION OF THE SOUTH AMERICAN SPECIES OF AMPHISBAENA (SQUAMATA, AMPHISBAENIDAE). Pap. Avul. Zool., Sao Paulo 42(15):351-362 - get paper here
 
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