Calamaria bitorques PETERS, 1872
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Calamaria bitorques
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| Higher Taxa | Colubridae, Calamariinae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) |
| Subspecies | |
| Common Names | E: Luzon Dwarf Snake |
| Synonym | Calamaria bitorques PETERS 1872 Calamaria gervaisi BOETTGER 1898 (non DUMÉRIL & BIBRON) Calamaria bitorques — INGER & MARX 1965: 104 Calamaria bitorques — BAUER et al. 1995: 70 Calamaria bitorques — GAULKE & VOGEL 2005 Calamaria cf. bitorques — GAULKE 2011: 252 Calamaria bitorques — WALLACH et al. 2014: 135 |
| Distribution | Philippines (Luzon, Panay) Type locality: “Philippinen” |
| Reproduction | oviparous |
| Types | Holotype: ZMB 7444 (Calamaria bitorques PETERS 1872) |
| Diagnosis | Diagnosis. Maxillary teeth modified; third and fourth supralabials entering orbit; preocular present; mental touching anterior chin shields; paraparietal surrounded by 5 shields and scales; 2 to 6 dark, black-edged, crossbands behind the head. Description. Rostral as wide as high, portion visible from above about 2/3 length of prefrontal suture; prefrontal shorter than frontal, touching first 2 supralabials; frontal hexagonal, 1.5 to 2 times width of supraocular, about 5/6 length of parietal; parietal 1.5 times length of prefrontal; paraparietal surrounded by 5 scales and shields; nasal much smaller than postocular; preocular present; postocular not as high as eye; eye equal to or slightly greater than eye-mouth distance; 5 supralabials, third and fourth entering orbit, fifth the largest, first 4 subequal; mental triangular, touching anterior chin shields; 5 infralabials, first 3 touching anterior chin shields; both pairs of chin shields meeting in midline; 3 gulars in midline between posterior chin shields and first ventral (Inger & Marx 1965). Body thickness index 0.016-0.063 (7 specimens); tail thick, tapered near end to blunt point; dorsal scales reduce to 4 rows on tail opposite sixth to eleventh subcaudal anterior to terminal scute (Inger & Marx 1965). Cloaca of females bilobed (1) or cardioid (1) (Inger & Marx 1965). Teeth: Nine modified maxillary teeth (2 specimens) (Inger & Marx 1965). Scale counts: Ventrals: males, 150-157 (mean 154.0; N=5); females, 157-197 (mean 173.4; N=14). Subcaudals: males, 17-20 (mean 18.3; N=6); females, 12-17 (mean 15.3; N=14) (Inger & Marx 1965). Total length: males, 150-333 mm.; females, 222-420 mm. Ratio of tail to total length: males, 0.066-0.087 (mean 0.076; N=5); females, 0.039-0.086 (mean 0.057; N=14) (Inger & Marx 1965). Coloration: light to dark brown above; dorsal scales with fine dark network; 2 to 6 dark-edged saddles on anterior part of body reaching the second or third scale row; behind area of saddles dorsum usually with scattered small, dark spots; scales of first row usually immaculate yellow at least in anterior half of body; head brown above with obscure dark markings; supralabials usually cream-colored without dark spots; a dark streak extending from nasal across lower edges of prefrontal and parietal and upper edge of last labial; underside of head yellowish, usually immaculate; ventrals immaculate yellow or with dark lateral edges; underside of tail immaculate yellow or with narrow dark mid-ventral streak (Inger & Marx 1965). Other description: Taylor 1922: 185 |
| Comment | Similar species: C. gervaisi. |
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