Laubuka parafasciata

diagnosis

Diagnosis Laubuka parafasciata can be distinguished by the combination of the following characters: Presence of a broad dark-brown midlateral stripe from posterior rim of orbit to middle of caudal-fin base, body elongate, dorsal profile convex, slightly concave between dorsal-fin origin and caudal-fin origin, mouth oblique, caudal-fin lobes subequal, pectoral-fin long, adpressed fin reaching midway between pelvic-fin origin and anal-fin origin, short pelvic fin, not reaching anal-fin origin, dorsal-fin rays ii, 8 ½, predorsal scales 16 – 18, lateral line complete with 28 – 33 scales, fins hyaline.

A review of genus Laubuka (Cypriniformes: Danionidae) in Myanmar with description of two new species

discussion

Comparisons Laubuka parafasciata is distinguished from Sri Lanka Laubuka species by the presence of a broad dark-brown stripe running along the flank (vs. absence in L. hema, presence of dark brown vertical bars on side of body in L. insularis, L. lankensis, L. ruhuna, and L. varuna); 28 – 32 + 2 lateral-line scales (vs. 34 – 37 + 1 – 2 in L. lankensis and L. insularis, 33 – 35 + 1 – 2 in L. hema, 31 – 33 + 1 – 2 in L. varuna and L. ruhuna); and 16 – 18 predorsal scales (vs. 18 – 21 in L. lankensis, L. insularis, L. ruhuna, and L. hema). It is distinguished from Indian Laubuka species by having 8 ½ branched dorsal-fin rays (vs. 7 ½ in L. trevori, L. latens, and L. fasciata); the presence of a broad dark-brown stripe along the side in alive specimens (vs. two longitudinal stripes, running from behind the opercle to the base of the caudal fin in L. trevori and the absence of any markings on the side of body other than the humeral and caudal-peduncle spots in L. latens), and minute tubercles scattered on the lower jaw (vs. lack of tubercles on the lower jaw in both species). It is distinguished from L. fasciata in having a short pelvic fin, not reaching the anal-fin origin (vs. elonga

A review of genus Laubuka (Cypriniformes: Danionidae) in Myanmar with description of two new species

distribution

Distribution It was collected in Kananme and Chaung Ma Gyi streams, Leldee Village, and Ann Stream near Ann Township, Rakhine State, Myanmar (Fig. 2).

A review of genus Laubuka (Cypriniformes: Danionidae) in Myanmar with description of two new species

description

Description. Morphometric data are presented in Table 1. Body elongate, compressed. Dorsal profile slightly convex, rising evenly from tip of snout to dorsal-fin origin, slightly concave between dorsal-fin origin and caudalfin origin. Ventral profile convex, keeled from vertical through posteriormost point of pectoral-fin base to anal-fin origin. Anus located just anterior to anal-fin origin. Head small, compressed, its dorsal profile almost straight, a slight indentation at nape, sub-acute in lateral view; depth much greater than width. Nostrils closer to orbit than to snout tip, dorsolaterally oriented. Barbels absent. Eye positioned laterally, visible in both dorsal and ventral view. Mouth oblique, angle of gape slightly anterior to vertical through anterior rim of orbit. Lower jaw with minute scattered tubercles, 4 pores over dentary. Dorsal fin with its origin closer to caudal-fin base than snout tip and posterior to vertical through anal-fin origin, with 2 simple and 8 ½ (14) branched rays. Pectoral fin long, with 1 simple and 9 (1), 10 (1), 11 (9) or 12 (3) branched rays, adpressed fin reaching midway between pelvic-fin origin and anal-fin origin. An axillary pectoral lobe p

Laubuka parafasciata, a new cyprinid fish species (Teleostei: Cyprinidae) from Mizoram northeastern India