Atractus carrioni PARKER, 1930
Can you confirm these amateur observations of Atractus carrioni?
|Higher Taxa||Colubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)|
|Common Names||Parker's Ground Snake|
|Synonym||Atractus carrioni PARKER 1930: 208|
Atractus carrioni — PETERS 1960
Atractus carrioni — PASSOS & ARREDONDO 2009
Atractus carrioni — WALLACH et al. 2014: 70
Type locality: Loja, Ecuador, 2200 m elevation. Map legend:
- Region according to the TDWG standard, not a precise distribution map.
NOTE: TDWG regions are generated automatically from the text in the distribution field and not in every cases it works well. We are working on it.
|Types||Holotype: BMNH 1922.214.171.124, female|
|Comment||DIAGNOSIS: An Atractus unique within the genus in having no loreal shield. Readily distinguished by the following combination of characteristics: (1) 15 scale rows; (2) no loreal, although a small preocular sometimes present; (3) maxillary teeth eight or nine; (4) ventrals in males, 145-149 (146) in females, 152-159 (155); and (5) dorsal coloration essentially uniform dark gray or brown [from SAVAGE 1960].|
Diagnosis. Atractus carrioni can be distinguished from all congeners by the following combination of characters: (1) 15 smooth dorsal scale rows; (2) single postocular; (3) loreal absent; (4) temporals usually 1+1; (5) usually six supralabials, third and fourth contacting orbit; (6) usually six infralabials, first four contacting chinshields; (7) eight to ten maxillary teeth; (8) usually three gular scale rows; (9) usually four pre-ventrals; (10) 143–161 ventrals in females, 136–151 in males; (11) 18–28 subcaudals in females, 25–33 in males; (12) dorsum of body uniformly gray to grayish brown; (13) venter usually brown to grayish brown, occasionally brown pigment restricted to mid portion of ventral scales in which the lateral areas are cream; (14) moderate body size, females reaching 495 mm SVL, males 350 mm; (15) small to moderate tail in females (8.0–14.7% of SVL), moderate to long in males (9.9–17.2% of SVL); (16) hemipenis moderately bilobed, semicapitate and semicalyculate [Passos 2013: 111].
Similar species: A. roulei. The two species differ primarily in the presence in roulei and absence in carrioni of the loreal shield.
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