http://pucir.inflibnet.ac.in:8080/jspui/handle/123456789/650 2026-04-30T15:31:02Z http://pucir.inflibnet.ac.in:8080/jspui/handle/123456789/656 Title: Integrative taxonomy reveals a new species of snakehead fish, Channa stiktos (Teleostei: Channidae), from Mizoram, North Eastern India Authors: Lalramliana Abstract: Channa stiktos, a new species of snakehead fish, is described from the River Kaladan and its tributaries, Mizoram, North Eastern India based on comparison of morphological and molecular features with closely related species. Channa stiktos is morphologically similar to C. ornatipinnis described from the Rakhine State of Myanmar, however, differs from it in having black spots on dorsal and ventral sides of the head (vs. no spots on dorsal and ventral sides of the head, but rather spots restricted to the post-orbital lateral region of the head), and lacking dark spot on the anal fin of juveniles (vs. presence of series of upto 10 dark spots). The molecular analysis, based on cytochrome c oxidase subunit I (COI) sequences, shows that C. stiktos is distinct from other close Channa species, except clade 3 of C. ornatipinnis, available in the GenBank (interspecies distance ranges from 8.24 – 25.33%). Channa stiktos clustered cohesively with clade 3 of C. ornatipinnis (only 1.43% genetic distance) indicating that they are conspecific. The genetic distance between Channa stiktos and C. ornatipinnis (from the type locality and another locality in the Ayeyarwaddy basin) are 8.24 – 8.59%, and between C. stiktos and C. pulchra is 12.92%, supporting the conclusion that they are different species. 2018-07-27T00:00:00Z http://pucir.inflibnet.ac.in:8080/jspui/handle/123456789/655 Title: DNA barcoding revealed a new species of Neolissochilus Rainboth, 1985 from the Kaladan River of Mizoram, North East India Authors: Lalramliana Abstract: Neolissochilus kaladanensis sp. nov., a new cyprinid species, is described from the Kaladan River drainage of Mizoram. It differs from all other valid Neolissochilus species in having higher number of gill rakers on the lower arm of the first gill arch (13–14 vs. 12 or below in all the species). The analysis of mitochondrial gene cytochrome c oxidase subunit I (COI) sequences separated N. kaladanensis sp. nov. from all other Neolissochilus and Tor species with an average genetic distance of 6.0%. It is further separated from the morphologically most similar species N. hendersoni and N. soroides by a genetic distance of 6.7% and 6.8%, respectively. Based on the lowest BIC and AICc scores, best fit model for COI dataset was TN93þGþI, out of 24 different nucleotide substitution models tested. The maximum-likelihood (ML) phylogenetic tree was constructed using the COI sequences of representative Neolissochilus and Tor species. The anomalies observed among the GenBank sequences of the genera Tor and Neolissochilus are also discussed. 2018-01-01T00:00:00Z http://pucir.inflibnet.ac.in:8080/jspui/handle/123456789/652 Title: Hemimyzon indicus, a new species of balitorid fish from the Kaladan basin, Mizoram, northeast India (Teleostei: Balitoridae) Authors: Lalramliana Abstract: Fishes of the genus Hemimyzon Regan, 1911, family Balitoridae, are found in the fast-flowing rivers of Southeast and East Asia, particularly in China, Taiwan, Thailand, Laos and Vietnam. The genus is very similar to the genus Balitora and can be separated mainly by having 3-7 simple pelvic rays and a more or less widened body, with pelvic-fin bases from widely separated to fused posteriorly (Kottelat, 2012). There are 16 valid species in the genus viz. H. confluens Kottelat, 2000, H. ecdyonuroides Freyhof & Herder, 2002, H. elongatus (Chen & Li, in Li & Chen, 1985), H. formosanus (Boulenger, 1894), H. khonensis Kottelat, 2000, H. macropterus Zheng, in Zheng & Huang, 1982, H. megalopseos Li & Chen, 1985, H. nanensis Doi & Kottelat, 1998, H. nujiangensis (Zhang & Zheng, in Zheng & Zhang, 1983), H. papilio Kottelat, 2000, H. pengi (Huang, in Zheng, Chen & Huang, 1982), H. pumilicorpora Zheng & Zhang, 1987, H. sheni Chen & Fang, 2009, H. taitungensis Tzeng & Shen, 1982, H. tchangi (Zheng, in Zheng, Chen & Huang, 1982) and H. yaotanensis (Fang, 1931) (see Kottelat, 2012). A survey conducted along the Kaladan River in Mizoram, northeastern India, resulted in the collection of a Hemimyzon species that markedly differs from all other congeners. It is described here as H. indicus. 2018-01-01T00:00:00Z http://pucir.inflibnet.ac.in:8080/jspui/handle/123456789/651 Title: Cabdio crassus, a new species of cyprinid fish (Teleostei: Cyprinidae) from the Kaladan River of Mizoram, India Authors: Lalramliana Abstract: Cabdio crassus, a new fish species, is described from the Kaladan River in Mizoram, India. The new species is distinguished from all its congeners by having a ventral keel extending from the middle of the chest, between the posterior base of the pectoral fin and along the abdomen up to the anus (vs. more or less keeled median scales from mid-point of abdomen between posterior base of pelvic fin up to anus in all other Cabdio) and 11½–12½ branched anal-fin rays (vs. 7 in C. jaya and 9 in both C. morar and C. ukhrulensis). It is further distinguished from C. morar and C. ukhrulensis by possessing more lateral-line scales (45–51 vs. 38–42 in C. morar and 35–37 in C. ukhrulensis), more predorsal scales (20–23 vs. 17–18 in C. morar and 14 in C. ukhrulensis) and more lateral transverse scales (½7/1/3½ vs. 5/1/2 in both C. morar and C. ukhrulensis). It also differs from C. jaya in having fewer lateral-line scales (45–51 vs. 52–60), more lateral transverse scales (½7/1/3½ vs. 5/1/3) and more pharyngeal tooth-rows (3 vs. 2). Furthermore, the cytochrome c oxidase sub unit I (coi) gene sequence separates Cabdio crassus from all other Cabdio species (interspecies distance ranges from 7.8– 12.3%). The anomalies observed among the GenBank sequences of the genus Cabdio are discussed and resolved. 2019-08-16T00:00:00Z