Marisora pergravis (BARBOUR, 1921)
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Marisora pergravis
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| Higher Taxa | Scincidae, Mabuyinae (Mabuyini), Scincoidea, Sauria, Squamata (lizards) |
| Subspecies | |
| Common Names | E: Providencia Island Skink, Providencia Skink |
| Synonym | Mabuya pergravis BARBOUR 1921: 85 Mabuya pergravis — DUNN, 1936:536 Mabuya mabouya pergravis — DUNN & SAXE 1950:154 Mabuya mabouya pergravis — PETERS & DONOSO-BARROS 1970:200 Mabuya mabouya pergravis — SCHWARTZ & THOMAS 1975:141 Mabuya mabouya pergravis — MACLEAN et al. 1977:40 (part) Mabuya mabouya pergravis — SCHWARTZ & HENDERSON, 1988:150 Mabuya mabouya pergravis — SCHWARTZ & HENDERSON, 1991:457 Mabuya pergravis — MIRALLES 2006:1 Mabuya pergravis — MCNISH 2011 Alinea pergravis — HEDGES & CONN 2012 Mabuya pergravis — PINTO-SÁNCHEZ et al. 2015 Marisora pergravis — HEDGES et al. 2019 Marisora pergravis — MCCRANIE et al. 2020 |
| Distribution | Colombia (Isla de Providencia, Isla Santa Catalina) Type locality: Isla de Providencia |
| Reproduction | ovovivparous. |
| Types | Holotype: USNM 13875 |
| Diagnosis | Diagnosis (pergravis). Alinea pergravis is characterized by (1) maximum SVL in males, 87.7 mm; (2) maximum SVL in females, 90.9 mm; (3) snout width, 2.65–3.07% SVL; (4) head length, 17.5–19.2% SVL; (5) head width, 10.8– 12.8% SVL; (6) ear length, 1.54–1.84% SVL; (7) toe-IV length, 11.4–13.2% SVL; (8) prefrontals, two; (9) supraoculars, four; (10) supraciliaries, four; (11) frontoparietals, two; (12) supralabial below the eye, five (20%), six (80%); (13) nuchal rows, one (80%), two (20%); (14) dorsals, 62–63; (15) ventrals, 70–73; (16) dorsals + ventrals, 132–136; (17) midbody scale rows, 28–30; (18) finger-IV lamellae, 15–16; (19) toe-IV lamellae, 17–20; (20) finger-IV + toe-IV lamellae, 32–36; (21) supranasal contact, Y; (22) prefrontal contact, N; (23) supraocular-1/ frontal contact, Y (80%), N (20%); (24) parietal contact, Y; (25) pale middorsal stripe, N; (26) dark dorsolateral stripe, N; (27) dark lateral stripe N; (28) pale lateral stripe, N; and (29) palms and soles, pale (Tables 3–5). Within the Genus Alinea, it is separated from all other species by having a higher number of dorsals (62–63 versus 54–61 in those other species) and combined dorsals and ventrals (dorsals + ventrals 132–136 versus 116– 130 in those other species). It also differs from A. berengerae and A. luciae in having more ventrals (70–73 versus 61–69 in those other species) and by having a larger auricular opening (ear length 1.54–1.84% SVL versus 1.43% SVL in A. berengerae and 0.983% SVL in A. luciae). From A. lanceolata it differs, additionally, by having a longer toe (toe-IV length 11.4–13.2% SVL versus 9.25–10.8% SVL in A. lanceolata). Alinea pergravis also differs from A. lanceolata and A. luciae in body shape (attenuate versus expanded at midbody) and ventral coloration (unpatterned versus ventral striping) [HEDGES & CONN 2012]. |
| Comment | Abundance: only known from the type locality (Meiri et al. 2017). Distribution: see map in McCranie et al. 2020: 317 (Fig. 6). |
| Etymology | Not given in original description (Barbour 1921). However, the species name is from the Latin per (very) and gravis (heavy), apparently in reference to the larger size of Alinea pergravis compared with a species (in the Genus Lygosoma) that Barbour considered it to be its close relative. It is not an exceptionally large species of mabuyine skink and is not closely related to Lygosoma [HEDGES & CONN 2012]. |
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