Geagras redimitus COPE, 1875
Can you confirm these amateur observations of Geagras redimitus?
|Higher Taxa||Colubridae, Colubrinae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)|
|Common Names||Tehuantepec Striped Snake|
|Synonym||Geagras redimitus COPE 1876: 141|
Geagras redimitus — COPE 1885: 177
Sphenocalamus lineolatus FISCHER 1885: 5
Tantilla depressa DUNN 1928
Geagras redimitus — LINER 1994
Geagras redimitus — LINER 2007
Geagras redimitus — WALLACH et al. 2014: 299
|Distribution||Mexico (Oaxaca, Sinaloa ?)|
Type locality: “west side of the State of Tehuantepec, Mexico” [= Pacific versant of Isthmus of Tehuantepec, Oaxaca, Mexico].
Type locality (Sphenocalamus lineolatus): Mazatlán (no state given). 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: USNM 30115|
|Comment||Type species: Geagras redimitus COPE 1876: 141 is the type species of the genus Geagras COPE 1876.|
Synonymy: There has been some speculation that this genus is a synonym of Tantilla. However, no molecular data appears to be available.
Distribution: Records of this species from Michoacán (Duellman, 1961) are based on Tantilla calamarina (Wilson and Meyer, 1981). Reports from Sinaloa may be in error. Hardy and McDiarmid (1969) listed G. redimitus as part of the Sinaloan herpetofauna, in part based on Duellman’s (1961) misidentification (fide WILSON & MATA-SILVA 2015).
Diagnosis (genus): Wilson (1987: 430.1) defined Geagras as “a colubrid genus characterized by: slender body with head not noticeably distinct from body; head cuneiform, head scutellation accordingly modified and simplified, consisting of a cuneiform rostral, two internasals and prefrontals, a broad scutiform frontal, two parietals, divided nasal, no loreal, single tiny preocular widely separated from postnasal, single postocular, temporals 1+1; five supralabials, with the third entering the orbit; six infralabials, with four touching anterior chin shields and fourth the largest; dorsal scales smooth, in 15 rows throughout; ventrals 113–124; anal plate divided; subcaudals 26–33, paired; maximum known total length 235 mm; maxillary teeth 10 (one count), separated by a short diastema from two distinctly enlarged grooved fangs; hemipenis simple [Smith, 1943, indicated the organ to be capitate, which appears unlikely] with single sulcus spermaticus, distal third calyculate, median third spinose, proximal third bare; dorsal color pattern of narrow diffuse dark lines or stripes coursing the length of all but two lower scale rows; head pattern of a dark median spatulate blotch bounded laterally by narrow pale markings which unite on snout, these in turn bounded below by a dark facial stripe.” (cited in WILSON & MATA-SILVA 2015).
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