Apostolepis tenuis RUTHVEN, 1927
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|Higher Taxa||Colubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)|
|Common Names||E: Bolivian Blackhead, Ruthven's Burrowing Snake|
|Synonym||Apostolepis tenuis RUTHVEN 1927: 1|
Apostolepis ambiniger — PETERS & OREJAS-MIRANDA 1970: 22
Apostolepis tenuis — DE LEMA 2002
Apostolepis tenuis — WALLACH et al. 2014: 53
|Distribution||Bolivia, Brazil (França et al. 2020)|
Type locality: Buena Vista, Santa Cruz, Bolivia.
|Types||Holotype: UMMZ 64436, collected by: Jose Steinbach|
|Diagnosis||Diagnosis: “Two upper labials, the 5th and 6th, in contact|
with the parietals; symphysial scale not in contact with chinshields; 4 lower labials in contact with chin-shields, the 4th the largest.” (Ruthven 1927)
Description: “Head relatively broad and flat; snout feebly projecting; eye small. Frontal as long as broad, shorter than its distance from end of snout, half as long as parietals. Nasal separated from preocular by prefrontal. A single post-ocular. Six upper labials, 2d and 3d entering eye; 4th entirely under post-ocular; 5th and 6th in contact with parietals. The first lower labials in contact behind symphysial; 4 lower labials in contact with chin-shields. Dorsal scale rows 15 ; ventrals 260 ; sub-caudals 37 ; anal plate divided. Body above with longitudinal blackish and yellow stripes, as follows: 1st and part of 2d scale row yellow; a black stripe involving part of 2d row, all of 3d and 4th rows, and most of 5th row; a yellow stripe encroaching on 5th row and involving all of the 6th and most of the 7th rows; a median black stripe covering the 8th and the scale edges of adjacent rows. End of the tail black above. Belly yellow, with a median series of dusky markings on the tail. Muzzle yellow above; an irregular yellow spot below the eye; head, including 1st row of scales on the occiput, blackish; a yellow nuchal band one scale wide.
Measurements: Total length, 308 mm. ; tail length, 36 mm” (Ruthven 1927)
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