Atractus trihedrurus AMARAL, 1926
Can you confirm these amateur observations of Atractus trihedrurus?
Atractus trihedrurus
Find more photos by Google images search: 
| Higher Taxa | Colubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) |
| Subspecies | |
| Common Names | E: Southern Ground Snake Portuguese: Cobra-da-Terra, Coral, Coral-Falsa |
| Synonym | Atractus trihedrurus AMARAL 1926: 105 Atractus trihedrurus — AMARAL 1978: 117 Atractus trihedrurus — PASSOS et al. 2005 Atractus trihedrurus — WALLACH et al. 2014: 82 Atractus trihedrurus — NOGUEIRA et al. 2019 |
| Distribution | S Brazil (São Paulo south to Santa Catarina), elevation between 500–1400 m. Type locality: Southern Brazil |
| Reproduction | oviparous |
| Types | Holotype: IBSP (= IB) 3098, adult male |
| Diagnosis | Diagnosis: Atractus trihedrurus is distinguished from all congeners by the following combination of characters: (1) 17/17/17 smooth dorsal scale rows; (2) generally two postoculars; (3) loreal moderate to long; (4) temporals 1+2; (5) generally seven supralabials, third and fourth contacting chinshields; (6) seven infralabials, first four contacting chinshields; (7) eight to ten maxillary teeth; (8) generally three gular scale rows; (9) generally three preventrals; (10) 146–159 ventrals in females, 136–150 in males; (11) 16–23 subcaudals in females, 23–29 in males; (12) dorsum uniformly beige, grayish brown, or black in adults and beige or creamish red with black bands in juveniles and sub-adults; (13) venter creamish brown to uniformly black; (14) large body size, with females reaching 1010 mm SVL and males 735 mm SVL; (15) tail short in females (7.3–10.7% SVL), moderate in males (9.6–15.5% SVL); (16) hemipenis moderately bilobed, semicapitate, and semicalyculate [from Passos et al. 2010]. 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 1157 characters) are available for collaborators and contributors. Please contact us for details. |
| Comment | According to SAVAGE (1960: 31) probably not an Atractus. Status unclear until holotype will be re-examined. Habitat: Upper Montane Rainforest. Similar species: A. zebrinus (for examples of misidentifications see Passos et al. 2022). |
| Etymology | Named after Greek triedro (τρίεδρο), geometric figure composed of three planes meeting at a single point + + Greek oura (ουρα), tail. ["...Cauda curta, em forma de pyramide triangular…"]. |
| References |
|
| External links |