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Amastridium sapperi (WERNER, 1903)

IUCN Red List - Amastridium sapperi - Least Concern, LC

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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common NamesE: Rusty-headed Snake
S: Zacatera Negra 
SynonymMimometopon sapperi WERNER 1903: 349
Amastridium sapperi — DUNN 1924
Amastridium sapperi — SMITH 1944
Amastridium sapperi — MARTIN 1958
Amastridium sapperi — STUART 1963 (fide VILLA et al. 1988)
Amastridium sapperi — SMITH 1971
Amastridium sapperi — WALLACH et al. 2014: 24 
DistributionHonduras, Guatemala, Mexico (Chiapas, Nuevo León, Tamaulipas, Hidalgo, Oaxaca, Querétaro, Puebla, San Luis Potosí), Belize

Type locality: “Guatemala”  
Reproduction 
TypesHolotype: ZSM (destroyed 24-25 April 1944 during World War II). 
DiagnosisDiagnosis: The species (northern populations formerly considered as A. veliferum) are characterized by having a separate loreal and much higher segmental counts (ventrals 146 to 158 in males, 144 to 170 in females; subcaudals 84 to 86 in males, 79 to 85 in females; ventrals plus subcaudals 229 to 250). These differences and the substantial range gap (650 km) between the nearest records of A. veliferum in extreme southeastern Nicaragua and putative A. sapperi from western Honduras lead Savage 2002 to accept Smith's interpretation of A. sapperi being a valid species. 
CommentSynonymy: PETERS & OREJAS-MIRANDA 1970 listed this species as a synonym of Amastridium veliferum. Smith (1971) maintained that the northern populations constitute a separate species, Amastridium sapperi Werner,1903 (see diagnosis). 
References
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  • Boettger, O. 1898. Katalog der Reptilien-Sammlung im Museum der Senckenbergischen Naturforschenden Gesellschaft in Frankfurt/M. 2.Teil (Schlangen). [type catalogue] Frankfurt/M (Gebr. Knauer), i-ix + 1-160. - get paper here
  • Boulenger, George A. 1905. Descriptions of new snakes in the collection of the British Museum. Ann. Mag. nat. Hist. (7) 15 (89): 453-456 - get paper here
  • Cope, E.D. 1861. Descriptions of reptiles from tropical America and Asia. Proc. Acad. Nat. Sci. Philadelphia 1860: 368-374 - get paper here
  • Dunn, E. R. 1924. Amastridium - a neglected genus of snakes. Proc. US Natl. Mus. 65 (11): 1-3. - get paper here
  • Dunn, E. R. 1931. Some Central American snake genera. Copeia 1931 (4): 163 - get paper here
  • Hansen, Robert W. and Daniel W. Vermilya. 2015. Geographic Distribution: Amastridium sapperi. Herpetological Review 46 (4): 571 - get paper here
  • Heimes, P. 2016. Snakes of Mexico. Chimaira, Frankfurt, 572 pp
  • Hoevers, L., & HENDERSON, R. W. 1974. Additions to the herpetofauna of Belize (British Honduras). Milwaukee Publ. Mus. Contr. Biol. Geol. No. 2, 6 pp.
  • Johnson, Jerry D.; Vicente Mata-Silva, Elí García Padilla, and Larry David Wilson 2015. The Herpetofauna of Chiapas, Mexico: composition, distribution, and conservation. Mesoamerican Herpetology 2 (3): 272–329. - get paper here
  • Lee, J. C. 2000. A field guide to the amphibians and reptiles of the Maya world. Cornell University Press, Ithaca,
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  • Lemos-Espinal, Julio A., Geoffrey R. Smith 2015. Amphibians and reptiles of the state of Hidalgo, Mexico. Check List 11 (3): 1642 - get paper here
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  • Savage, J.M. 2002. The Amphibians and Reptiles of Costa Rica: A Herpetofauna Between Two Continents, Between Two Seas. University of Chicago Press, 934 pp. [review in Copeia 2003 (1): 205]
  • Smith, H. M. 1971. The snake genus Amastridium in Oaxaca, Mexico. Great Basin Naturalist. 31 (4): 254-55
  • Smith, Hobart M. 1944. Snakes of the Hoogstraal Expeditions to northern Mexico. Zoological Series of Field Museum of Natural History 29 (8): 135-152 - get paper here
  • Solís, J. M., L. D. Wilson, and J. H. Townsend. 2014. An updated list of the amphibians and reptiles of Honduras, with comments on their nomenclature. Mesoamerican Herpetology 1: 123–144 - get paper here
  • Terán-Juárez, Sergio A., Elí García Padilla, Vicente Mata-Silva, Jerry D. Johnson and Larry David Wilson. 2016. The herpetofauna of Tamaulipas, Mexico: composition, distribution, and conservation status. Mesoamerican Herpetology 3 (1): 43–113 - get paper here
  • Vásquez-Cruz, Víctor; Luis Canseco-Márquez 2020. AMPHIBIAN AND REPTILES OF THE COLONIA AGRÍCOLA RINCÓN DE LAS FLORES, TEZONAPA, VERACRUZ, MEXICO. Rev. Latinoamer. Herp. 3 (1): 66-80 - get paper here
  • Wallach, Van; Kenneth L. Williams , Jeff Boundy 2014. Snakes of the World: A Catalogue of Living and Extinct Species. [type catalogue] Taylor and Francis, CRC Press, 1237 pp.
  • Werner, FRANZ 1903. Ueber Reptilien und Batrachier aus Guatemala und China in der zoologischen Staats-Sammlung in München nebst einem Anhang über seltene Formen aus anderen Gegenden. Abhandl. Königl. Bayer. Akad. Wissensch., Munich, (ser. 2) 22 (2): 343-384 - get paper here
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  • Woolrich-Piña, G. A., E. García-Padilla, D. L. DeSantis, J. D. Johnson, V. Mata-Silva, and L. D. Wilson. 2017. The herpetofauna of Puebla, Mexico: composition, distribution, and conservation status. Mesoamerican Herpetology 4(4): 791–884
 
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