Atractus nigriventris AMARAL, 1933
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Atractus nigriventris
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| Higher Taxa | Colubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) |
| Subspecies | |
| Common Names | E: Black-ventered Ground Snake E: Three-banded Ground Snake [trivittatus] |
| Synonym | Atractus nigriventris AMARAL 1933: 116 Atractus trivittatus AMARAL 1933: 118 Atractus nigriventris — PASSOS & ARREDONDO 2009 Atractus trivittatus — PASSOS & ARREDONDO 2009 Atractus trivittatus — WALLACH et al. 2014: 82 Atractus nigriventris — WALLACH et al. 2014: 77 Atractus nigriventris — PASSOS et al. 2024: 47 |
| Distribution | Colombia (Santander, Boyacá) Type locality: Chita, southeast of San Gil, Dep. de Santander, Boyacá (fide Passos et al. 2024), Colombia (06°11′N, 72°28′W; ca. 2,900 m asl) trivittatus: Colombia (Santander); Type locality: Chita, Dep. de Santander, Colombia |
| Reproduction | oviparous |
| Types | Holotype: MLS 234, adult female Holotype: IBSP (= IB) 84, male [trivittatus] |
| Diagnosis | Diagnosis: Atractus nigriventris can be distinguished from all congeners by the following combination of characters: (1) dorsal scale rows smooth, 17/17/17; (2) postoculars two; (3) loreal long; (4) temporal formula 1 + 2; (5) supralabials seven or eight, 3 and 4 or 4 and 5 contacting eye; (6) infralabials seven or eight, 1−3 or 1−4 contacting chin-shields; (7) maxillary teeth 9−13; (8) gular scale rows three or four; (9) preventrals usually four; (10) ventrals 161−174 in females, 155−162 in males; (11) subcaudals 23−32 in females, 28−33 in males; (12) in preservative, dorsum brown with black spots or dots on the paravertebral region, juveniles displaying more marks above paravertebral region; (13) in preservative, ventral ground color uniformly black or cream with black blotches linearly arranged, forming three irregular longitudinal stripes; (14) moderate body size, females reaching 387 mm SVL, males 346 mm SVL; (15) moderate tail length in females (10.9−13.2% SVL) and males (13.0−15.4% SVL); (16) hemipenis moderately bilobed (based on fully retracted organ); (17) laterosphenoid unknown. (Passos et al. 2024) Additional details (7926 characters) are available for collaborators and contributors. Please contact us for details. |
| Comment | Synonymy: PASSOS et al. 2024 synonymized Atractus trivittatus with Atractus nigriventris. Etymology: Atractus trivittatus was probably named after Latin trivittatus, who bears three ribbons or bands. |
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