Dibamus irregularis KLIUKIN, BRAGIN, NGUYEN, VU, LE, GORIN, KRONE & POYARKOV, 2026
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Dibamus irregularis
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| Higher Taxa | Dibamidae, Sauria, Squamata (lizards) |
| Subspecies | |
| Common Names | E: Chu Yang Sin Blind Skink |
| Synonym | Dibamus irregularis KLIUKIN, BRAGIN, NGUYEN, VU, LE, GORIN, KRONE & POYARKOV 2026 |
| Distribution | Vietnam (Dak Lak Province: Chu Yang Sin National Park) Type locality: pine forests on the northern slopesof Mt. Chu yang Sin, within the Chu yang Sin National Park, lien Son lak Commune, dak lak Province, Vietnam(12.38704 N, 108.34078 E; elevation 1,338 m a.s.l. ((Fig. 1, locality 10) |
| Reproduction | |
| Types | Holotype. ZMMu re-18313 (adult male; field tag NAP-15988), collected on May 29, 2014, by N. A. Poyarkov andS. X. le. Paratypes (n = 11). Adult male VrtC NAP-15948 (former ZMMu re-18317; field tag NAP-15948) and adult female VrtC NAP-15949 (former ZMMu re-18320; field tag NAP-15949) collected from pine forests onthe northern slope of Mt. Chu yang Sin, within the Chu yang Sin NP, lien Son lak Commune, dak lak Province,Vietnam (12.38704 N, 108.34078 E; elevation 1,338 m a.s.l.) on April 24, 2024, by A. M. Bragin and N. A. Poyarkov.Subadult male ZMMu re-18314 (field tag NAP-15870), adult female ZMMu re-18315 (field tag NAP-15871),and subadult female ZMMu re-18316 (field tag NAP-15872) collected from pine forests at the within the Chuyang Sin NP, lien Son lak Commune, dak lak Province, Vietnam (12.38750 N, 108.34417 E; elevation 761 ma.s.l.) on May 29, 2014, by N. A. Poyarkov and S.X. le. two adult males ZMMu re-18318 (field tag NAP-15978),ZMMu re-18319 (field tag NAP-15979), three adult females ZMMu re-18321 (field tag NAP-15950), ZMMure-18322 (field tag NAP-15980), ZMMu re-18323 (field tag NAP-15981) and one subadult female ZMMu re-18324 (field tag NAP-15951), with the same collection information as the holotype. |
| Diagnosis | Diagnosis: the new species Dibamus irregularis sp. nov. can be distinguished from all other congeners by thefollowing combination of morphological characters: (1) maximum SVl of 147 mm; (2) tail comparatively short,tl comprising 14–16.8% of SVl in a single male; (3) labial sutures generally complete, nasal sutures incomplete,medial rostral suture generally present and incomplete; (4) from two to three postocular scales; (5) from three tofour scales bordering the posteromedial edge of the first infralabial; (6) the medial sublabial scale not enlarged;(7) 21–23 midbody scale rows; (8) 24–27 transverse scale rows just posterior to head; (9) 19–21 transverse scalerows just anterior to vent; (10) 180–211 ventral scales; (11) 39–46 subcaudal scales; (12) relative size of frontalto frontonasal 71.9%–117.8%; (13) relative size of interparietal to nuchal scale 133.9%; and (14) the light coloredbands on the body present. (Kliukin et al. 2026) Unfortunately we had to temporarily remove additional information as this was scraped by multiple AI companies who sell that data. However, these details, e.g. detailed descriptions (about about 4.4 pages) are available for collaborators and contributors. Please contact us if you need any of this material. |
| Comment | |
| Etymology | The new species epithet is a latin adjective in nominative singular, meaning “irregular,” andis given in reference to the high intraspecific variability of external morphological features in the new species,especially to the irregularity and asymmetry of the number of postocular scales (Fig. 6). Since Allen greer’s revision(greer 1985) and in all subsequent papers describing new species of Dibamus, the number of postocular scales wasconsidered as a relatively stable diagnostic character underlying diagnoses for new species of dibamids, which in partcould be explained by generally small sample sizes of Dibamus spp. available for examination. however, Dibamusirregularis sp. nov. demonstrates an unexpectedly irregular and asymmetrical number of postocular scales: fivespecimens have two postoculars, four specimens have three postoculars, and three specimens have two postocularson the left side and three on the right side of the head. |
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