Rena klauberi FLORES-VILLELA, SMITH, CANSECO-MÁRQUEZ & CAMPBELL, 2022
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|Higher Taxa||Leptotyphlopidae, Epictinae, Epictini, Typhlopoidea, Serpentes, Squamata (snakes)|
|Synonym||Rena klauberi FLORES-VILLELA, SMITH, CANSECO-MÁRQUEZ & CAMPBELL 2022|
Leptotyphlops sp. B. — ADALSTEINSSON et al. 2009: 7 (Fig. 3), 48 (App. 1)
Rena sp. B. — ADALSTEINSSON et al. 2009: 20, 31 (Fig. 12), 48 (App. 1)
Type locality: Mexico, Jalisco, Río Cartagena, adjacent to the road between Santa María de Los Ángeles and Bolaños, 1,602 m (21o59’0.24” N, 103o20’27.816” W).
|Types||Holotype: MZFC-HE-17047, collected by Eric Smith and Jesse Meik, on 10 June 2003.|
|Diagnosis||Diagnosis: A species of the R. dulcis group that differs from R. maxima, in having 10 rows of scales around the tail (vs. 12); from R. bressoni, R. myopica, and R. dissecta in having an undivided anterior supralabial (vs. divided); from R. dulcis in having nine scales on the dorsal surface with dark pigment (vs. seven); from R. humilis in having supraoculars (vs. absent); and by having 10 rows of scales around the tail (12 in R. humilis group members, except for R. h. segrega and R. h. tenuicula that have 10). Rena klauberi differs from all other Mexican Rena, except the holotype of R. d. iversoni, in having a darkly pigmented cloacal plate, while the remainder of the venter is immaculate (from Flores-Villela et al. 2022).|
Description of the holotype. Middorsal scales 252 between the rostral scale and the tail tip; 14 rows of smooth, imbricate scales around body, constant between head and level in front of cloaca; 10 rows of scales around midpoint of tail; subcaudals 14, not including tail tip; cloacal plate undivided; rostral scale curving over snout, posterodorsal end rounded; nasal divided horizontally, nostril between upper and lower nasals, located medially between the suture; lower nasals extend to lip; four scales bordering mouth on each side behind rostral (lower nasal, anterior supralabial, ocular, and posterior supralabial); anterior supralabials 1/1, undivided; posterior supralabials 1/1, higher than wide, barely touching corner of mouth; parietals large, three times higher than wide, contacting posterior supralabials; supraoculars 1/1, equal in size to the frontal; occipitals 1/1, subequal to parietals, undivided; temporals 1/1, preventing contact between occipitals and posterior supralabials; postfrontal slightly wider than frontal, and separating supraoculars; interparietal slightly wider than postfrontal and interoccipital (Fig. 2); mental scale about three and a half times wider than long; infralabials 4/4, first pair separated medially by postmental, second pair larger than first and third and separated from each other by three median chin shields, fourth pair slender; body cylindrical from head to tail, with ultimate scale terminating in a well-defined spine. (from Flores-Villela et al. 2022).
Coloration. After preservation, nasal openings surrounded by pale coloration; central area of rostral with a pale transverse marking; eyes visible through skin (Figs. 1, 2); seven dorsal scale rows uniformly dark brown; adjacent scale row slightly paler (total nine dark rows), pattern extending along entire length of body and tail (Fig. 1); venter pinkish on anterior half of body, grading to cream on posterior half; cloacal plate covered with dark pigmentation (Fig. 3); midventral row of subcaudal scales cream; paraventral subcaudal rows brown near cloaca and cream color distally. In life, dorsal coloration similar to that in preservative. (from Flores-Villela et al. 2022).
Measurements. Total length 265 mm; tail length 14.4 mm; relative tail length (or tail/LOA) 5.4%; horizontal diameter of body at head 3.8 mm, diameter at midbody 4.7 mm, diameter of body at base of tail 4.4 mm; diameter of head at interocular level 3.4 mm; relative rostral width 1.4; relative body proportion (or length/width ratio) 56.4; tail length/tail width ratio 3.27; rostral width/head width ratio 0.71. (from Flores-Villela et al. 2022).
|Etymology||Named after Laurence Monroe Klauber, in recognition of his valuable contributions to North American herpetology, and especially to our knowledge of the genus Leptotyphlops (= Rena) from North America.|
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