Indian Glass Barb

biology_ecology

Habitat and biology This species usually inhabits shallow streams with slow and moderate flow water and seasonal wetlands. Coexisting species include Mystus pulcher, Channa striata, Channa gachua, Lepidocephalichthys berdmorei, Systomus sarana, Osteobrama belangeri, Esomus danrica, Danio albolineatus, and Mastacembelus armatus.

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

description

Description Measurement and counts are shown in Table 5 and Figure 7 for general appearance. Body elongate, compressed laterally. Dorsal profile moderately arising, thorax and abdomen curved. Head small, bending upward. Eyes large and placed laterally, visible in both dorsal and ventral views. Mouth superior. Lower jaw smooth, tubercles absent. Nostrils closer to orbit than to snout tip, dorsolaterally oriented. Barbels absent. Scales cycloid, thin, and transparent. Dorsal-fin origin at anterior two-thirds of body length, inserted posterior to anal-fin origin, length of rays gradually decreased from second unbranched ray to last one. Dorsal-fin rays ii, 8 ½ (5). Anal-fin base longer than dorsal-fin base, posterior rays gradually shorter. Anal-fin rays iii, 14 ½ (1), 17 ½ (1), 18 ½ (2), 20 ½ (1). Pectoral fin long, falcate, not reaching end of pelvic-fin rays. Pectoral-fin rays i, 10 (2), 11 (1), 12 (2). Pelvic fin short, not reaching anus. Pelvic-fin rays with i, 6 (4) or 7 (1). Caudal peduncle short. Caudal fin forked, upper lobe slightly larger. Lateral line complete, with 29 – 36 + 1 scales. Predorsal scales 14 (1), 15 (3), 17 (1). Circumpeduncular scales 12 (5). Coloration Pres

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

diagnosis

Diagnosis Laubuka laubuca can be distinguished by the combination of the following characters: Head bending upward, presence of a black roundish humeral spot behind operculum and a fainted spot at origin of caudal fin, a narrow black stripe from middle of body side to caudal but not reaching caudal-fin base, abdomen silver with a black edge in middle, pectoral fin long with i, 10 – 12 rays; not reaching end of pelvic-fin rays; lateral line complete with 29 – 36 scales, predorsal scales 14 – 17.

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

discussion

Comparisons The color pattern, measurements, and counts do not include characters separating from L. laubuca reported here from Bangladesh and India (Kullander et al. 2018; Sudasinghe et al. 2020). Laubuka laubuca is distinguished from Sri Lanka Laubuka species by having 14 – 17 predorsal scales (vs. 18 – 21 in L. lankensis, L. insularis, L. ruhuna, and L. hema); 6 – 7 branched pelvic-fin rays (vs. 5); and the absence of distinct vertical bars on the lateral body anteriorly (vs. presence) in L. lankensis, L. insularis, L. varuna, and L. ruhuna. It is further distinguished from Indian Laubuka species by possessing 14 – 17 predorsal scales (vs. 16 – 18 in L. parafasciata, L. fasciata, L. trevori, and 18 – 21 in L. latens); 6 – 7 branched pelvic-fin rays (vs. 5 in L. trevori and L. latens); and the presence of bright copper midlateral line which is more apparent on posterior half of body in alive specimens (vs. a broad midlateral stipe on the body in L. parafasciata, L. fasciata, and L. trevori, the absence of any markings on the side of body other than the humeral and caudal-peduncle spots in L. latens). It is distinguished from Southeast Asian species by the absence of short vertica

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