Calamodontophis ronaldoi is a species of snake in the family Colubridae. The species is endemic to southern Brazil.
Etymology The specific name, ronaldoi, is in honor of Brazilian herpetologist Ronaldo Fernandes (born 1966).Beolens, Bo; Watkins, Michael; Grayson, Michael (2011). The Eponym Dictionary of Reptiles. Baltimore: Johns Hopkins University Press. xiii + 296 pp. . (Calamodontophis ronaldoi, p. 225).
Geographic range C. ronaldoi is found in the Brazilian state of Paraná. www.reptile-database.org.
Description C. ronaldi may be identified by distinctive markings on the head and body. On the head, it has a black comma-shaped blotch which extends from the corner of the mouth to the gular scales, and a separate oval black blotch on the parietals. On the body, it has a light-colored longitudinal dorsal line.
Reproduction C. ronaldi is viviparous.
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