Pseudolaguvia virgulata, a new sisorid catfish (Teleostei: Sisoridae) from Mizoram, northeastern India

Abstract

Pseudolaguvia virgulata, a new South Asian sisorid catfish species, is described from the Barak River drainage in Mizoram, India. The new species can be distinguished from congeners in having a brown body with two or three narrow, pale longitudinal stripes and a pale Y-shaped marking on the dorsal surface of the head. Additional distinguishing characters from its congeners are a serrated anterior edge of the dorsal spine, the thoracic adhesive apparatus reaching beyond the base of the last pectoral-fin ray, head width, pectoral-fin length, length of dorsal-fin base, dorsal-spine length, body depth at anus, length of adipose-fin base, caudal peduncle length, caudal peduncle depth, snout length, interorbital distance, and total number of vertebrae.

Pseudolaguvia moinensis, a new benthic miniature Asian catfish (Teleostei: Sisoridae) from Arunachal Pradesh, north-eastern India

“…Of the total twenty three recognized species of Pseudolaguvia , about half (9 species) are confined to Brahmaputra River drainages in northeastern India and Rangapani Khal, Bangladesh (Ng, 2009; Ng & Tamang, 2012; Tamang & Sinha, 2014): P. foveolata , P. ferula , P. viriosa , P. muricata , P. magna , P. jiyaensis , P. ribeiroi , P. shawi , and P. ferruginea ; seven species P. kapuri , P. inornata , P. flavida , P. virgulata , P. assula , P. nepalensis and P. flavipinna from the Ganga drainage system (Tamang & Sinha, 2014; Rayamajhi et al ., 2016; Bhakat, 2019); two species each: P. nubila from the Kaladan River, and P. fucosa from the Karnaphuli River drainage, Mizoram (Ng et al ., 2016); P. austrina from Bharathapuzha River and P. lapillicola from Subramanya and Kumaradhara River in peninsular India (Britz et al ., 2013); and P. tenebricosa and P. tuberculata from the Sittang and Irrawaddy river systems, Myanmar (Britz, 2003); and lastly, one species P. spicula from the Surma-Meghna river drainage in northeast India and Bangladesh (Ng & Lalramliana, 2010b).…”

“…Among all congeners, Pseudolaguvia moinensis shares P. ferruginea , the light brown to cream V-shaped and an oblique bands along the flank of the body, but differs by a deeper body at anus (12.4–16.8% SL vs.10.5–12.4), anal fin with a narrower (maximal width 5–8½ times anal-fin length vs. slightly more than 2½; data calculated from Ng, 2009; fig.7b, holotype) subdistal brown band; and tip of anal fin extending beyond (vs. extending at the level of) posterior end of adipose fin.…”

“…Pseudolaguvia foveolata , P. kapuri , P. ribeiroi , P. ferruginea and P. flavida : Ng (2005a) and Ng (2009). P. ferula : Ng (2006a), P. inornata and P. muricata : Ng (2005b), P. tenebricosa, P. tuberculata : Britz & Ferraris (2003), P. virgulata : Ng & Lalramliana (2010a), P. spicula : Ng & Lalramliana (2010b). P. austrina : Radhakrishnan et al .…”

“…Members of the south Asian sisorid catfish genus Pseudolaguvia are small sized benthic fishes, recorded not more than 47 mm SL, and occurs throughout hill streams and larger rivers along the sub-Himalayan foothills, spanning from the Ganges River drainage, Nepal in the west, Ganges-Brahmaputra River basin in the north and northeast India, the Bharatapuzha River, Western Ghats, Kerala, and the Kumaradhara River, Karnataka, in the south, the Brahmaputra drainages in Bangladesh and the Ayeyarwaddy and Sittang drainages in Myanmar in the east (Ng 2006a; Ng & Lalramliana 2010a; Ng & Lalramliana 2010b; Radhakrishnan et al ., 2011; Britz et al ., 2013; Ng & Conway, 2013; Rayamajhi et al ., 2016).…”

“…Currently, twenty three species of Pseudolaguvia are recognized (Ng et al ., 2016; Bhakat, 2019): P. ribeiroi (Hora, 1921), P. shawi (Hora, 1921), P. foveolata Ng, 2005, P. ferula Ng, 2006, P. ferruginea Ng, 2009, P. viriosa Ng & Tamang, 2012, P. magna Tamang & Sinha, 2014, P. jiyaensis Tamang & Sinha, 2014 and P. muricata Ng, 2005, P. kapuri (Tilak & Hussain, 1973), P. inornata Ng, 2005, P. flavida Ng, 2009, P. virgulata Ng & Lalramliana, 2010, P. assula Ng & Conway, 2013, P. nepalensis Rayamajhi et al ., 2016, P. flavipinna Bhakat, 2019, P. nubila Ng et al ., 2013, and P. fucosa Ng et al ., 2016, P. spicula Ng & Lalramliana, 2010, P. austrina Radhakrishnan, et al . 2011, P. lapillicola Britz et al ., 2013, P. tenebricosa Britz & Ferraris, 2013 and P. tuberculata (Prashad & Mukerji, 1929).…”