Mabuya yasuniensis TORRES-CARVAJAL, SANDOVAL & PAUCAR, 2024
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Mabuya yasuniensis
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| Higher Taxa | Scincidae, Mabuyinae (Mabuyini), Scincoidea, Sauria, Squamata (lizards) |
| Subspecies | |
| Common Names | |
| Synonym | Mabuya yasuniensis TORRES-CARVAJAL, SANDOVAL & PAUCAR 2024 |
| Distribution | Ecuador (Orellana) Type locality: Yasuní National Park in a lagoon close to Yasuní River, 6 km S Rumiyacu River mouth (0.967°S, 75.875°W, 190 m), Orellana Province, Ecuador |
| Reproduction | |
| Types | Holotype. An adult male, QCAZ 14814 (Figs 2, 4, 5), field number SC55292, collected on 29 July 2016 at 1630 h by Rubén Jarrín. Paratypes (13). ECUADOR: Orellana: Oasis community, 500 m from Napo River, 0.460°S, 76.135°W, 220 m, QCAZ 10740; Puerto Yuturi, 0.557°S, 76.008°W, 230 m, QCAZ 3609; Yasuní National Park, near PUCE (Pontificia Universidad Católica del Ecuador) scientific station, 0.677°S, 76.401°W, 273 m, QCAZ 5901; Yasuní National Park, near PUCE scientific station, 0.674°, 76.398°, 264 m, QCAZ 17519; Yasuní National Park, near PUCE scientific station, north trail of 50 ha dynamic forest plot, 0.681°S, 76.403°W, 285 m, QCAZ 10229; Puerto Francisco de Orellana (El Coca), 0.467°S, 76.983°W, QCAZ 185; Río Bigal Biological Reserve, 0.537°S, 77.425°W, 955 m, QCAZ 17646; Taracoa, 0.490°S, 76.773°W, 251 m, QCAZ 1118. Pastaza: Jatun Yaku community, 5 km SE Montalvo, 2.084°S, 76.921°W, 286 m, QCAZ 4839; K10 camp, Villano camp, Bloque 10-Agip Oil, 1.475°S, 77.534°W, 468 m, QCAZ 11832. Sucumbíos: La Selva Amazon Ecolodge, 0.498°S, 76.374°W, 229 m, QCAZ 2926; Cuyabeno Wildlife Reserve, PUCE scientific station, 0.002°S, 76.176°W, QCAZ 2623; Cuyabeno Wildlife Reserve, bridge on Cuyabeno River, 0.031°S, 76.321°W, QCAZ 7138. |
| Diagnosis | Diagnosis. Mabuya yasuniensis sp. nov. can be distinguished from other congeners by the combination of the following character states: (1) prefrontals paired; (2) frontoparietals paired; (3) supraciliaries four, second longest; (4) supraoculars four, second largest; (5) supralabials seven, fifth longest and below eye; (6) nuchals in one pair; (7) dorsals smooth; (8) scales around midbody 26–30; (9) dorsals 47–52; (10) ventrals 32–40; (11) caudals smaller and similar in shape to dorsals; (12) lamellae under fourth finger 12–16; (13) lamellae under fourth toe 16–19; (14) palms and soles dark; (15) dark dorsolateral stripes absent; (16) pale dorsolateral stripes absent. Among species of Mabuya known to occur in Ecuador—M. altamazonica and M nigropunctata—, M. yasuniensis is most similar to M. altamazonica in having (1) seven supralabials, with the fifth being the largest and located under the eye (eight supralabials, with the sixth being the largest and located under the eye in M. nigropunctata), and (2) parietals in contact posterior to interparietal (no contact in M. nigropunctata). However, M. yasuniensis can be readily distinguished by having four supraciliaries, of which the second is longer than the others (usually five subequal supraciliaries in both M. altamazonica and M. nigropunctata). The new species is closely related to M. bistriata Spix, 1825 (Fig. 1), which also has four supraciliaries, the second the longest. It differs from M. bistriata in (1) lacking a pair of thin, pale dorsolateral stripes from neck to midbody (Fig. 2), and having (2) dark palms and soles (Fig. 4), darker than venter (palms and soles cream or tan, similar in color to venter in M. bistriata), and (3) 47–52 transverse rows of dorsal scales (53–59 in M. bistriata; Table 2). |
| Comment | |
| Etymology | Named after the type locality, the Yasuní National Park, where the species was discovered. |
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