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Rhadinella schistosa SMITH, 1941

IUCN Red List - Rhadinella schistosa - Least Concern, LC
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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common NamesE: Brokencollar Graceful Brown Snake
S: Hojarasquera de Collar Roto 
SynonymRhadinella schistosa SMITH 1941: 7
Rhadinaea schistosa — MARX 1976
Rhadinaea schistosa — LINER 1994
Rhadinaea schistosa — LINER 2007
Rhadinella schistosa — MYERS 2011
Rhadinella schistosa — WALLACH et al. 2014: 644 
DistributionMexico (C Veracruz)

Type locality: Cuautlapan, Veracruz.  
Reproductionoviparous 
TypesHolotype: FMNH 100065 
DiagnosisDiagnosis (genus): See group definition in Myers (1974: 119). Separated from Rhadinaea and most other dipsadines by the straight-line arrangement of several enlarged posterior maxillary teeth (ultimate fang not offset). The maxillary dentition is similar in Trimetopon, a variable genus of diminutive snakes in lower Central America that differs from Rhadinella in lacking a basal nude pocket on the hemipenis (MYERS, unpublished, and MYERS 2011).


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CommentRhadinaea schistosa mimicks Micrurus elegans (TORRE-LORANCA et al. 2006).

Type species: Rhadinella schistosa SMITH 1941 is the type species of the genus Rhadinella SMITH 1941 which was resurrected by MYERS 2011. 
EtymologyFrom the Greek “schisto-” meaning split or divided and the Latin suffix“-ōsa” used for making adjectives. However, according to the original description, the epithet schistosa reffers to the highly resemblance of this species to Tantilla schistosa, another common species found in the same locality where Rhadinella schistosa was described.

The genus was named after Greek rhadinos (ῥαδινός), slender, taper + Latin -ella, suffix diminutive. [".... From Rhadinaea it differs in its smaller size, short tail…"]. 
References
  • Ariano-Sánchez, D. y J. Campbell. 2018. A new species of Rhadinella (Serpentes: Dipsadidae) from the dry forest of Motagua Valley, Guatemala. Zootaxa 4442 (2): 338-344 - get paper here
  • CAMPBELL, JONATHAN A. 2015. A new species of Rhadinella (Serpentes: Colubridae) from the Pacific versant of Oaxaca, Mexico. Zootaxa 3918 (3): 397–405 - get paper here
  • CAMPILLO, GUSTAVO; LUIS FERNANDO DÁVILA-GALAVÍZ, OSCAR FLORES-VILLELA, JONATHAN A. CAMPBELL 2016. A new species of Rhadinella (Serpentes: Colubridae) from the Sierra Madre del Sur of Guerrero, Mexico. Zootaxa 4103 (2): 165-173 - get paper here
  • Heimes, P. 2016. Snakes of Mexico. Chimaira, Frankfurt, 572 pp
  • 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
  • Marx, Hymen 1976. Supplementary catalogue of type specimens of reptiles and amphibians in Field Museum of Natural History. Fieldiana: Zoology 69 (2): 33-94 - 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
  • Simón-Salvador PR, Arreortúa M, Flores CA, Santiago-Dionicio H, González-Bernal E 2021. The role of Indigenous and Community Conservation Areas in herpetofauna conservation: a preliminary list for Santa Cruz Tepetotutla, Oaxaca Mexico. ZooKeys 1029: 185-208 - get paper here
  • Smith, H.M. 1941. A new genus of Mexican snakes related to Rhadinaea. Copeia 1941 (1): 7-10 - get paper here
  • Torre-Loranca, M.A. de la; Aguirre-León, G. & López-Luna, M.A. 2006. Coralillos verdaderos (Serpentes: Elapidae) y Coralillos falsos (Serpentes: Colubridae) de Veracruz, México. Acta Zoologica Mexicana 22 (3): 11-22 - get paper here
  • Torres-Hernández, LA, Ramírez-Bautista A, Cruz-Elizalde R, Hernández-Salinas U, Berriozabal-Islas C, DeSantis DL, Johnson JD, Rocha A, García-Padilla E, Mata-Silva V, Fucsko LA, and Wilson LD. 2021. The herpetofauna of Veracruz, Mexico: composition, distribution, and conservation status. Amphibian & Reptile Conservation 15(2) [General Section]: 72–155 - 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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