Atractus obtusirostris WERNER, 1916
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Atractus obtusirostris
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| Higher Taxa | Colubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) |
| Subspecies | |
| Common Names | E: Bignose Ground Snake |
| Synonym | Atractus obtusirostris WERNER 1916: 308 Atractus obtusirostris — AMARAL 1931: 88 Atractus obtusirostris — PETERS & OREJAS-MIRANDA 1970: 32 Atractus obtusirostris — PASSOS & LYNCH 2010 Atractus obtusirostris — WALLACH et al. 2014: 77 |
| Distribution | Colombia (Tolima; Pensilvania) Type locality: Cañon del Tolima, Dep. de Tolima, Colombia Lectotype locality: Canñon del Tolima (5 Combeima River; west Ibague, 04° 26’ N, 75° 14’ W, ca. 1100 m elevation), department of Tolima, Colombia. |
| Reproduction | oviparous |
| Types | Holotype: MCZ 22347 (fide Köhler & Kieckbusch 2014); Syntype: ZMH (formerly no. 33, 181), male, subadult. Formerly 3 syntypes. The single syntype of (ZMH 4428 (now lectotype), is one of the smaller ones of the type series. Lectotype: Adult male, ZMH 4428 (designated by PASSOS & LYNCH 2010). |
| Diagnosis | Diagnosis: Atractus obtusirostris is distinguished from all congeners by having: (1) 17/ 17/17 smooth dorsal scale rows; (2) two postoculars; (3) moderate loreal; (4) temporals 1 + 2; (5) seven supralabials, third and fourth contacting orbit; (6) seven infralabials, first three contacting chinshields; (7) 9–11 maxillary teeth; (8) three or four gular scale rows; (9) three or four preventrals; (10) 160–164 ventrals in females, 145–151 in males; (11) 27–32 subcaudals in females, 30–37 in males; (12) dorsal ground color pale brown with conspicuous vertebral line generally connected to paravertebral blotches and first two scale rows contrasting to remaining series; (13) venter predominantly cream with little invasion of brown pigment between suture of the ventral scales; (14) small to moderate body size, females reaching 376 mm SVL, males 240 mm SVL; (15) moderate tail in females (11.3–13.7% SVL) and long (14.6–18.1% SVL) in males; (16) hemipenis moderately bilobed, semicapitate, semicalyculate. |
| Comment | See also A. melanogaster. Specimens: Werner described this species based on 3 specimens. Later specimens have been confused with A. melanogaster or A. crassicaudatus. |
| Etymology | Named after Latin obtusus, blunt and Latin rostris, beak, snout. [“...Schnauze breit abgerundet...”]. (from Esteban Lavilla, pers. comm., May 2024) |
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