39 



Type species: Natrix piinctatissimus (= Coluber pallidus Linnaeus) Wagler 1824, (In Spix, Sp. Nov. Serp. 

 Bras.: 39.) 



Thamnodynastes chaquensis Bergna & Alvarez, 1993 



Thamnodynastes chaquensis Bergna & Alvarez, 1993. Facena 10: 5-18. 

 Type locality: Colonia Las Mercedes, San Fernando Department, Chaco, Argentina. 



Distribution: Chaco, Formosa, Salta, Santa Fe and Corrientes (Bergna & Alvarez, 1993; Giraudo & Quaini, 

 1997). Also in Paraguay (Giraudo, 1996). Chaquefia province (Oriental district). 



Thamnodynastes hypoconia (Cope, 1860) 



Tachymenis hypoconia Cope, 1860. Proc. Acad. Nat. Sci. Philad.: 247. 



Thamnodynastes nattereri Boulenger, 1896 (partim). Cat. Sn. Brit. Mus. Nat. Hist. 3: 1 16. 



Dryophilav pallidus strigilis Serie, 1936. Inst. Mus. Univ. La Plata, Obra Cincuentenario: 49. 



Thamnodynastes strigilis Peters & Orejas Miranda, 1970 (partim). Bull. U. S. Nat. Mus. 297 (1): 301. 



Thamnodynastes hypoconia Cei, Bergna & Alvarez, 1992. Facena 9: 123. 

 Type locality: Buenos Aires, Argentina. 



Distribution: Buenos Aires, Corrientes, Chaco, Entre Ri'os, Formosa, Santa Fe and Santiago del Estero 

 (Abalos, Baez & Nader, 1964; Cei, Bergna & Alvarez, 1992; Bellagamba & Vega, 1996; Cacivio, 1997; 

 Giraudo & Quaini, 1997). Also in south and east Paraguay and Uruguay (Giraudo, 1997; Achaval & Olmos, 

 1997). Chaquefia (Oriental district) and Espinal province. 



Comments: Cei (1993) mentioned this species in Cordoba, based on Weyemberg, but there are no specimens 

 to confirm the presence of this taxon in the province. Thus, we consider it to be absent. We mention Santiago 

 del Estero in the distribution based on Abalos, Baez & Nader (1964), who described and illustrated an 

 individual from Los Telares, Salavina Department that clearly is this species. 



Thamnodynastes strigatus (Giinther, 1858) 



Tomodon strigatus Giinther, 1858. Cat. Snakes Brit. Mus. Nat. Hist.: 52. 



Mesotes obstrusus Jan, 1863. Arch. Zool. Anat. Fis. 2: 306. 



Thamnodynastes strigatus Boulenger, 1886. Ann. Mag. Nat. Hist. (5) 18: 437. 



Tachymenis strigatus Cope, 1887. Proc. Am. Phil. Soc. 24: 28. 



Thamnodynastes nattereri Boulenger, 1896. Cat. Sn. Brit. Mus. Nat. Hist. 3: 116. 



DryophylcLx nattereri Amaral, 1926. Rev. Mus. Paulista. 14: 27. 



Thamnodynastes strigatus Hoge, 1948. Mem. Inst. Butantan 21: 59. 

 Type locality: "India". 



Distribution: Northeastern Corrientes, Misiones, Entre Rios (border areas of Uruguay River) and 

 northeastern Buenos Aires in delta region (Gallardo, 1982; Couturier et al., 1983; Vuoto, 1995; Giraudo, 

 1997; Giraudo & Quaini, 1997). Also Paraguay, southern Brazil and Uruguay (Achaval & Olmos, 1997). 

 Paranaense province. 



Comments: Argentinian distribution was formerly considered larger, probably because misidentifications of 

 other taxa and occasional overflowing of rivers that could cause records as Couturier et al. ( 1983) mentioned 

 in the delta of Buenos Aires. It does not inhabit Chaco, Santa Fe and Formosa, where it was not found after 

 intensive surveys (Giraudo, 1997; Alvarez et al., 1996). 



Tomodon Dumeril, 1853 



Tomodon Dumeril, 1853. Mem. Acad. Sci. Paris, 23: 495. 

 Type species: Tomodon dorsatum Dumeril, Bibron & Dumeril, 1854. The name is a nomen nudum in the 

 original description of the genus in 1853. 



Tomodon dorsatus Dumeril, iiibron et Dumeril 1854 



Tomodon dorsatum Dumeril, Bibron et Dumeril, 1854. Erp. Gen. 7: 934. 



Tomodon dorsatus Boulenger, 1896. Cat. Snakes Brit. Mus. Nat. Hist. 3: 121. 

 Type locality: Brazil, mentioned doubtfully by original authors, surelly from America. 

 Distribution: Misiones. Also central and southern Brazil and eastern Paraguay (Giraudo, 1997). Paranaense 

 province. 



