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Rhadinella hannsteini (STUART, 1949)

IUCN Red List - Rhadinella hannsteini - Data Deficient, DD

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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common NamesE: Hannstein's Spot-lipped Snake
S: Lagartijerita Labio-manchdao 
SynonymTrimetopon hannsteini STUART 1949: 165
Trimetopon hannsteini — STUART 1963
Trimetopon hannsteini — PETERS & OREJAS-MIRANDA 1970: 308
Rhadinaea hannsteini — MYERS 1974: 130
Rhadinaea hannsteini — VILLA et al. 1988
Rhadinaea hannsteini — LINER 1994
Rhadinaea hannsteini — LINER 2007
Rhadinella hannsteini — MYERS 2011
Rhadinella hannsteini — WALLACH et al. 2014: 642 
DistributionSE Mexico (Chiapas), Guatemala

Type locality: Finca La Paz, 1450 meters elevation, 18 kilometers (airline) due north of Coatepeque, Departamento de San Marcos, Guatemala.  
Reproductionoviparous 
TypesHolotype: UMMZ 98756 
DiagnosisDiagnosis: Rhadinaea hannsteini is a small brownish snake with a pale, broken neck-ring, a dark vertebral line, and several additional lines or stripes on each side. It has 17 scale rows and thus differs from related species characterized by 19 or 21 rows, and the several well-defined dark lines distinguish it from several small species that have a pale collar but no dark lateral lines. Rhadinaea hannsteini can be distinguished from the remaining members of the godmani group (R. kinkelini, R. lachrymans, R. pinicola) in having only one postocular, rather than two, and in details of color pattern. The species is most likely to be confused with R. kinkelini (q.u.) and, although the number of postoculars separates all specimens examined, close attention should be given to the illustrations of heads and body patterns; in addition to the slight differences in body striping, it will be noted that hannsteini lacks large pale areas on the frontal plate, whereas such markings are characteristic of kinkelini and some other members of the godmani group. (Myers 1974: 130)


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CommentNot mentioned in Campbell 1999 (Guatemala). 
EtymologyNamed after Walter Bernhard Hannstein (b. 1902), a German whose father emigrated to Guatemala (1892). In the 1940s he bought a coffee plantation, Finca La Paz, which is still owned and managed by his descendants (fide Beolens et al. 2011). 
References
  • Beolens, Bo; Michael Watkins, and Michael Grayson 2011. The Eponym Dictionary of Reptiles. Johns Hopkins University Press, Baltimore, USA - get paper here
  • Heimes, P. 2016. Snakes of Mexico. Chimaira, Frankfurt, 572 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
  • Liner, Ernest A. 2007. A CHECKLIST OF THE AMPHIBIANS AND REPTILES OF MEXICO. Louisiana State University Occasional Papers of the Museum of Natural Science 80: 1-60 - get paper here
  • Myers, C.W. 1974. The systematics of Rhadinaea (Colubridae), a genus of New World snakes. Bull. Amer. Mus. nat. Hist. 153 (1): 1-262 - get paper here
  • Myers, Charles W. 2011. A New Genus and New Tribe for Enicognathus melanauchen Jan, 1863, a Neglected South American Snake (Colubridae: Xenodontinae), with Taxonomic Notes on Some Dipsadinae. American Museum Novitates (3715): 1-33 - get paper here
  • Stuart, L. C. 1949. A new Trimetopon (Ophidia) from Guatemala. Proc. Biol. Soc. Washington 62: 165-168 - get paper here
  • Stuart, L.C. 1963. A checklist of the herpetofauna of Guatemala. Misc. Publ. Mus. Zool., Univ. Michigan (No. 122): 1-150 - 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.
 
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