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Tomodon dorsatus DUMÉRIL, BIBRON & DUMÉRIL, 1854

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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common NamesE: Pampas Snake
Portuguese: Boipemi, Cobra-Cinzento-Castanha, Cobra-Espada, Cobra-Espada-Comum, Cobra-Espada-Grande, Cobra-Espada-Verdadeira, Corre-Campo, Jararaca-da-Chuva, Jararaca-Falsa 
SynonymTomodon dorsatum DUMÉRIL, BIBRON & DUMÉRIL 1854: 934
Opisthoplus degener PETERS 1883: 1149
Tomodon dorsatus — BOULENGER 1886: 435
Tomodon dorsatum — BOULENGER 1896 (3): 121
Aproterodon clementei VANZOLINI 1947
Opisthoplus degener — HOGE 1959
Tomodon dorsatus — PETERS & OREJAS-MIRANDA 1970
Tomodon degener — WILLIAMS & WALLACH 1989
Tomodon dorsatus — CEI 1993
Tomodon dorsatum — BAUER et al. 1995: 73
Tomodon dorsatus — STARACE 1998: 341
Tomodon dorsatum — WALLACH et al. 2014: 731
Tomodon dorsatus — NOGUEIRA et al. 2019
Tomodon dorsatus — TREVINE et al. 2022 
DistributionC/SE Brazil (Rio Grande do Sul, Rio de Janeiro), N Argentina (Misiones), French Guiana, Paraguay (fide Paul Smith, pers. comm., 27 Apr 2014), Uruguay

Type locality: Brazil  
Reproductionovovivparous 
TypesHolotype: MNHN-RA 3737 (formerly MHNMF)
Holotype: ZMB 10376 [Opisthoplus degener] 
DiagnosisDiagnosis (genus). “Smooth dorsals in 17/17/15 rows; pupil circular; oral mucosa black; modified maxillary bone, reduced in size and in number of teeth, with a deeply enlarged sulcated last tooth and a unique anterior maxillary diastema; dentary teeth 6−12; loreal scale absent; supralabials 7; eye height equivalent to eye length; ventral portion of body with sparse pigmentation, not forming longitudinal lines or stripes.” (Trevine et al. 2022, Appendix 3) 
CommentSynonymy partly that of PETERS & OREJAS-MIRANDA 1970.

Type species: Tomodon dorsatum DUMÉRIL, BIBRON & DUMÉRIL 1854 is the type species of the genus Tomodon DUMÉRIL 1853: 495 and DUMÉRIL, BIBRON & DUMÉRIL 1854: 932.

For a comparison of Tomodon dorsatus, T. orestes, T. ocellatus, and Pseudotomodon trigonatuts see Harvey & Muñoz 2004: 366 (Table 1). 
EtymologyThe genus was named after the Greek “tomos” = to cut, and “odon” or “odous” = tooth), hence the gender is masculine (fide Trevine et al. 2022). 
References
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  • Bizerra, Alessandra; Marques, Otavio A.V.; Sazima, Ivan 2005. Reproduction and feeding of the colubrid snake Tomodon dorsatus from south-eastern Brazil. Amphibia-Reptilia 26 (1): 33-38 - get paper here
  • Boulenger, G.A. 1886. A synopsis of the reptiles and batrachians of the province Rio Grande do Sul, Brazil. Ann. Mag. nat. Hist. (5) 18: 423-445 - get paper here
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