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Dibamus deimontis KLIUKIN, BRAGIN, VAN NGUYEN, LE,TRAN, GORIN & POYARKOV, 2024

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Higher TaxaDibamidae, Sauria, Squamata (lizards)
Subspecies 
Common Names 
SynonymDibamus deimontis KLIUKIN, BRAGIN, VAN NGUYEN, LE,TRAN, GORIN & POYARKOV 2024 
DistributionS Vietnam (Ninh Thuan)

Type locality: eastern slope of Nui Chua Mountain within Nui Chua National Park, thai An Village, Vinh Hai Commune, Ninh Hai District, Ninh Thuan Province, southern Vietnam (11.723°N, 109.137°e; elevation 695 m a.s.l.)  
Reproduction 
TypesHolotype. ZMMu re-17821, Adult male; field tag NAP-13707) collected on March 3, 2023, at 10:00 h by A. M. Bragin, N. A. Poyarkov, and S. X. Le.
Paratypes (n=7). ZMMu re-17822 (field tag NAP-13640), ZMMu re-17824 (field tag NAP-13706) and VrtC NAP-13708 (field tag NAP-13708), three adult males collected at the same locality as the holotype on March 3–5, 2023 from the elevations 670–700 m a.s.l.; ZMMu re-17823 (field tag NAP-13641), ZMMu re-17825 (field tag NAP-13709), and ZMMu re-17826 (field tag NAP-13710), ZMMu re-17827 (field tag NAP-13711), two adult females and two subadult females, respectively, with the same collection information as the holotype and other paratypes. 
DiagnosisDiagnosis: 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) ribs on 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). the new species Dibamus deimontis sp. nov. can be distinguished from all other congeners by the following combination of morphological characters: (1) maximum SVl of 136.2 mm; (2) tail comparatively long, tl comprising 18.6–22.1% of SVl in males, 17.6–20.2% of SVl in females; (3) labial, nasal, medial and lateral rostral sutures present but incomplete; (4) postocular scales generally three, rarely two; (5) three to five scales bordering the posteromedial edge of the first infralabial; (6) the medial sublabial scale not enlarged; (7) 22–25 midbody scale rows; (8) 25–30 transverse scale rows just posterior to head; (9) 19–21 transverse scale rows just anterior to vent; (10) 193–225 ventral scales; (11) 47–55 subcaudal scales; (12) relative size of frontal to frontonasal 106.7–133.8%; (13) relative size of interparietal to surrounding scales 97.2–115.0%; and (14) the light colored band on the body generally present. (Kliukin et al. 2024) 
Comment 
EtymologyNamed after the type locality on Nui Chua Mountain, Ninh thuan Province, Vietnam. As Nui Chua Mt. is the highest peak in the area, in Vietnamese “Núi Chúa” literally means “the Mountain of god”, or “the Mountain of lord”, which can be translated to latin as “deimontis”. 
References
  • KLIUKIN, NIKITA S.; ANDREY M. BRAGIN; TAN VAN NGUYEN; SON XUAN LE; TIN TRONG VO TRAN; VLADISLAV A. GORIN & NIKOLAY A. POYARKOV 2024. Another new species of Dibamus Duméril & Bibron, 1839 (Squamata: Dibamidae) from Nui Chua National Park, Ninh Thuan Province, Vietnam Zootaxa 5406 (1): 087–104
 
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