Riama labionis (KIZIRIAN, 1996)
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Riama labionis
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| Higher Taxa | Gymnophthalmidae (Cercosaurinae), Sauria, Gymnophthalmoidea, Squamata (lizards) |
| Subspecies | |
| Common Names | |
| Synonym | Proctoporus labionis KIZIRIAN 1996: 112 Proctoporus labionis — DOAN & SCHARGEL 2003 Riama labionis — DOAN & CASTOE 2005 |
| Distribution | Ecuador (Cotopaxi) Type locality: San Francisco de Las Pampas, Cotopaxi, Ecuador [78° 58’ W, 00° 25’ S], 1800 m elevation |
| Reproduction | oviparous |
| Types | Holotype: UMMZ 188631, adult male |
| Diagnosis | Diagnosis: (1) Frontonasal usually longer than frontal; (2) nasoloreal suture absent; (3) supraoculars four, usually second, third, and fourth in contact with ciliaries; (4) superciliary series incomplete, usually one; (5) supralabial-subocular fusion present; (6) postoculars two; (7) postparietals two or three, usually two; (8) supratympanic temporals two; (9) genials two or three, usually two, transverse sutures not perpendicular with respect to midline of body; (10) dorsals rectangular, juxtaposed, with rounded keel; (11) longitudinal dorsal scale rows in males 23-29, in females 22-27; (12) transverse dorsal scale rows in males 36-39, in females 35-39; (13) transverse ventral scale rows 21-23; (14) lateral scale rows 2-5; (15) femoral pores in males 10-12, in females 1-6, usually with hiatus; scales between femoral pores in males 0-2, in females one or two, usually two; (16) subdigital scales on Toe I three or four; (17) limbs not overlapping when adpressed against body in adults; (18) anterior cloacal plate scales paired or unpaired; (19) hemipenial flounces in two columns of obliquely arranged rows (?); (20) dorsum dark brown; venter cream with brown smears in scale centers, forming lines especially laterally; subcaudally cream with scattered, brown, indistinct spots, gradually becoming dark brown posteriorly. In Proctoporus labionis, the color pattern on the ventral surface of the tail is cream anteriorly with few dark brown spots, becoming dark brown posteriorly (also present in some P. hypostictus). Proctoporus labionis also always has supralabial-subocular fusion (variably present in other species). This species is further distinguished from other congeners by the following (condition for P. labionis in parentheses): All congeners except P. unicolor and P. cashcaensis: three or four (two?) columns of hemipenial flounces. P. cashcaensis: femoral pores usually 6-8 (10-12) in males, scale between femoral pore series 3-6 (one or two); ventral and subcaudal transverse bands (spots). P. unicolor: supratympanic temporals 2-4, usually three (usually two), uniform dark belly (with spots) and subcaudal stripes often present (absent). All Ecuadorian congeners except P. cashcaensis, P. hypostictus, and P. simoterus: supralabial-subocular fusion usually absent (present). P. hypostictus: longitudinal dorsal scale rows 13-18 (2229); genials three (usually two); supratympanic temporals three (usually two); frontonasal usually shorter (usually longer) than frontal; femoral pores in males usually 4-6 (10-12). P. simoterus: superciliary series complete (incomplete); femoral pores in males six or seven (10-12). Species occurring outside of Ecuador: P. luctuosus group: superciliary series complete (incomplete). P. achlyens, P. laevis, P. luctuosus: nasoloreal suture present (absent), dorsolateral stripes, ocelli, or other markings present dorsally (nearly unicolored). P. columbianus: dorsal scales smooth (keeled/striated). P. striatus: superciliary series complete (incomplete); limbs overlapping (not overlapping) when adpressed against body; femoral pores 4-9 (10-12); hemipenial flounces in four (two) columns, asulcate expansion pleat present (flounces continuous on asulcate side). (Kizirian 1996) Unfortunately we had to temporarily remove additional information as this was scraped by multiple AI companies who sell that data to their customers. These details, e.g. detailed descriptions or comparisons (about 7156 characters) are available for collaborators and contributors. Please contact us for details. |
| Comment | |
| Etymology | The specific epithet, labionis, is the genitive singular case of the proper Latin name (noun), Labeo, -onis, which means "one with large lips" and alludes to the large supralabial, apparently fused to the adjacent subocular, found in all specimens of this species. |
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