Drymobius chloroticus (COPE, 1886)
Can you confirm these amateur observations of Drymobius chloroticus?
|Higher Taxa||Colubridae, Colubrinae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)|
|Common Names||E: Green Highland Racer|
S: Corredora Verde
|Synonym||Dendrophidion chloroticum COPE 1886: 278|
Drymobius chloroticus — COPE 1887: 69
Drymobius chloroticus — BOULENGER 1894: 16
Drymobius chloroticus — PETERS & OREJAS-MIRANDA 1970: 98
Drymobius chloroticus — VILLA et al. 1988
Drymobius chloroticus — LINER 1994
Drymobius chloroticus — LINER 2007
Drymobius chloroticus — WALLACH et al. 2014: 246
|Distribution||SE Mexico (Verarcuz, Oaxaca, Chiapas, San Luis Potosi, Hidalgo, Guerrero), Belize ?, Honduras, Guatemala, El Salvador, Nicaragua; elevation (Honduras): 780-1900 m|
Type locality: Guatemala. Restricted to Cobán, Guatemala.
|Types||Holotype: USNM 6755, a 1048 mm female (H. Hague).|
|Diagnosis||Original description from COPE (1886): The scales are in seventeen rows, of which four rows on each side are smooth on the anterior part of the body, and only two smooth on the posterior. The parietal plates are a little longer than the frontal, which has straight sides. The eye is large, its anteroposterior diameter equaling the width of the superciliary and frontal scuta combined, and equaling the length of the muzzle to the middle of the prenasal plate. Oculars 1-2. Temporals 2-2, all narrow. Superior labials nine, the last three longer than high. Loreal large, higher than long: nasals rather small. Gastrosteges 169; anal 1-1; urosteges, 117. Color above, including ends of gastrosteges, green: below yellow. On stretching the skin it is seen to be black between the scales of the sides of every second or third row, in oblique lines running upwards and forwards. Total length M.1.048; of tail, .341; to rictus oris .027.|
This species is abundantly different from the D. melanotropis Cope, but is near to the D. dendrophis Schl. The muzzle is shorter than in our specimens of the latter, and in those figured by Jan, and the number of keeled rows of scales is less, nine to fifteen. The color is entirely different.
|Comment||Relative abundance in Honduras: rare|
It seems likely that the two nominal taxa, D. chloroticus and D. melanotropis, will ultimately prove to be geographic variants of a single species, although Wilson (1970,1975b) reported virtual sympatry for the two: D. chloroticus at a locality 19 km north of Matagalpa, Nicaragua. The presumed differences between chloroticus and melanotropis are trivial (chloroticus: no black keels on the dorsal scales, subcaudals 1.07 to 125; melanotropis: black keels on the three uppermost dorsal scales, subcaudals 91 to 96). The degree to which the keels are darkened in Costa Rican examples is now known to be variable, so this feature does
not reliably separate the nominal species [from SAVAGE 2002].
Distribution: Taylor's records (1951, 1954) for the related species Drymobius chloroticus are based on examples of Dendrophidion paucicarinaturus (Wilson 1970). Not in Costa Rica fide SAVAGE 2002.
|Etymology||The specific epithet is derived from the Greek word chloros, meaning "green," and the suffix -ticus, meaning "a condition of," in reference to the snake's overall green coloration.|