Dibamus tropcentr KLIUKIN, VAN NGUYEN, LE, BRAGIN, TRAN, GORIN & POYARKOV, 2023
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Dibamus tropcentr
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| Higher Taxa | Dibamidae, Sauria, Squamata (lizards) |
| Subspecies | |
| Common Names | E: Ninh Thuan Blind Skink Russian: Ninthuanskaya cherveobraznaya yascheritsa Vietnamese: Thằn lằn giun Ninh Thuận |
| Synonym | Dibamus tropcentr KLIUKIN, VAN NGUYEN, LE, BRAGIN, TRAN, GORIN & POYARKOV 2023: 304 Dibamus tropcentr — KLIUKIN et al. 2024 |
| Distribution | S Vietnam (Ninh Thuan) Type locality: trail to Ao Ho Pond area, ca. 300 m from #702 road, Da Vach Mountain, Da Vach Peninsula, Nui Chua National Park, Thai An Village, Vinh Hai Commune, Ninh Hai District, Ninh Thuan Province, southern Vietnam (11.736°N, 109.213°E; elevation 200 m a.s.l.) |
| Reproduction | |
| Types | Holotype. ZMMU Re-17443, Adult female; field tag NAP-13228) collected on January 7, 2023, at 08:30 h by N. A. Poyarkov and S. X. Le. Paratypes. ZMMU Re-17444 (field tag NAP-13142 / VRTC.NC.053), adult male collected at the same locality as the holotype on September 10, 2022, by S. X. Le; ZMMU Re-17572 (field tag NAP-13530), ZMMU Re-17573 (field tag NAP-13531), and ZMMU Re-17574 (field tag NAP-13532), two adult females and one subadult female respectively, collected at the same locality as holotype on February 28, 2023, by N. A. Poyarkov and A. M. Bragin; and VRTC NAP-13639 (field tag NAP-13639) and ZMMU Re-17575 (field tag NAP-13712), adult female and adult male respectively, collected in the valley of Nuoc Ngot River (11.778°N, 109.176°E; elevation 280 m a.s.l.), ca. 3 km south-west from Nuoc Ngot Beach, on the territory of Nui Chua N.P., Thai An Village, Vinh Hai Commune, Ninh Hai District, Ninh Thuan Province, southern Vietnam, on February 7, 2023, by N. A. Poyarkov and A. M. Bragin. |
| Diagnosis | Diagnosis: The new species is assigned to Dibamus based on the following morphological characters: (1) worm-like body shape, fore limbs absent, hind limbs rudimentary, present only in males, forming flap-like structures located near the base of the tail above the vent; (2) eyes rudimentary, completely covered by scales; (3) external ear openings absent; (4) enlarged plate-like scales on the head; (5) postorbital bone absent; (6) epipterygoid absent; (7) temporal bone absent; (8) rib of last presacral vertebra absent; (9) tail length less than 34.0% of SVL; (10) subcaudal scales in females reduced to 64; and (11) postsacral vertebrae reduced to 36 in a single male (Greer 1985). Dibamus tropcentr sp. nov. can be distinguished from all other congeners by the following combination of morphological characters: (1) maximum SVL of 96.2 mm; (2) tail comparatively long, TL comprising 24.4–30.0% of SVL; (3) labial, nasal and medial rostral sutures present but incomplete, lateral rostral sutures completely absent; (4) two postocular scales; (5) three to four scales bordering the posteromedial edge of the first infralabial; (6) the medial sublabial scale not enlarged; (7) 19–21 midbody scale rows; (8) 23–24 transverse scale rows just posterior to head; (9) 18–19 transverse scale rows just anterior to vent; (10) 198–227 ventral scales; (11) 64–65 subcaudal scales; (12) relative size of frontal to frontonasal 88.5–120.5%; (13) relative size of interparietal to surrounding scales 91.3–128.6%; and (14) the light colored band on the body generally present. (Kliukin et al. 2023) |
| Comment | |
| Etymology | Named after the Joint Vietnam - Russia Tropical Science and Technology Research Centre (VRTC). This international organization has been conducting research on ecology and biodiversity of Vietnam for over 35 years (1989–2023). |
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