Sundadanio gargula Conway, Kottelat & Tan, 2011

Family:  Sundadanionidae (Tiny danios)
Max. size:  1.9 cm SL (male/unsexed)
Environment:  demersal; freshwater
Distribution:  Asia: Bangka Island, Sumatra, Indonesia.
Diagnosis:  Dorsal soft rays (total): 9-9; Anal soft rays: 9-9; Vertebrae: 34-34. Distinguished all its congeners by the greater distance between the dark lateral stripe and the ventral midline in males (13.5-14.5 % SL vs. 8.7- 13.6) and by its larger and more numerous tubercles (enlarged scales next to window in body musculature with a vertical row of 3-5 large conical tubercles vs. 1-3; scales posterior to enlarged scales next to window in body musculature and anterior to anal-fin origin with 2 large, closely situated conical tubercles at center vs. 1 or 2 small, widely spaced tubercles). Can be further distinguished by the following combination of characters: large adult body size (largest specimen examined 19.0 mm SL, smallest tuberculate male 15.2 mm SL); live males with blue to emerald green sheen present across dorsal body surface and an intense red colour across anterior portion of anal fin; preserved males with a highly developed dark lateral stripe of uniform intensity along its entire length, horizontal through ventral border of which, when brought forward, extends through dorsal half of eye; absence of secondary lateral stripe in preserved males; absence of reticulate pattern along dorsal body surface; absence of dusky markings on dorsal and caudal fins; complete covering of scales on caudal peduncle (Ref. 88800). Description: Dorsal-fin rays ii.6.i; anal-fin rays iii.6; pectoral-fin rays i.6.ii; pelvic-fin rays i.5.i (Ref. 88800).
Biology:  Inhabits peat swamp forests (Ref. 88800).
IUCN Red List Status: Vulnerable (VU); Date assessed: 04 January 2019 (B1ab(i,ii,iii)+2ab(i,ii,iii)) Ref. (130435)
Threat to humans:  harmless

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