Atractus nigriventris AMARAL, 1933
Can you confirm these amateur observations of Atractus nigriventris?
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) Unfortunately we had to temporarily remove additional information as this was scraped by multiple AI companies who sell that data to their customers. These details, e.g. detailed descriptions or comparisons (about 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. |
| Etymology | Named after Latin nigro, black, dark and Latin venter, stomach, womb; belly. [“...margeando as ventraes que são inteiramente cinzento-anegradas em todo o resto de sua extensão...”]. (from Esteban Lavilla, pers. comm., May 2024) |
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