Yumnam Lokeshwor

• Ph.D.
• Professor (Assistant) at Dhanamanjuri University

Garra dohjei, a new labeonine fish with transverse lobe and incipient proboscis is described from the Ñiangdai, a tributary of the Brahmaputra River, Meghalaya, India. The new species is distinguished from its congeners with transverse lobe and incipient proboscis, in having a well-developed transverse lobe with around 9–12 minute tubercles, deep t...

Parambassis waikhomi Geetakumari & Basudha, 2012, locally called Ngamhai in Manipuri dialect, is carnivorous in nature, mainly feeds on zooplankton, larvae, nymph etc. The alimentary canal of P. waikhomi is short with well demarcated stomach, and villiform teeth in both the jaws. The values of relative gut length (RGL) ranges from 0.44-0.5 for the...

Garra nasuta (McClelland, 1838) is redescribed based on the specimens collected from two river basins in the Khasi Hills, Meghalaya. It was described as Platycara nasuta by McClelland in 1828 from Kasya mountains, Assam (now Khasi Hills, Meghalaya). The type specimens of G. nasuta do not exist, and its identity is not yet clear. The study has been...

A cobitid genus Neoeucirrhichthys, a monotypic loach under family cobitidae, was described based on a single specimen of N. maydelli from Janali River (Brahmaputra River system) at Raimona, Goalpara district, Assam. Almost after four decades an attempt was made to redescribe Neoeucirrhichthys maydelli from Mechi River, Nepal without mentioning pres...

The spined loaches under the genus Lepidocephalichthys Bleeker, 1863 under family Cobitidae are colourful freshwater fishes with both ornamental and food values and are characterized by the presence of a sub-orbital spine and pectoral rod formed by the fused last two pectoral-fin rays in males. Out of the 9 valid species of Lepidocephalichthys in t...

Schizothorax chivae Arunkumar & Moyon, a cold-water cyprinid fish under family Cyprinidae, from Chiva River (Chindwin basin), Manipur, needs taxonomic validation as the authors did not registered in the research paper in Zoobank, a mandatory for online publication of journal as per ICZN electronic publication amendment (ICZN 2012: 1–7) in addition...

The present study is based on the comparative osteology among Schistura fishes with incomplete lateral line found in Meghalaya. Six species are studied for osteology, three already described ones and three unknown species. The clearing and staining of this species group showed variations and similarities in their neurocranium structure, ceratobranc...

Garra nasuta (McClelland, 1838) is redescribed based on the specimens collected from two river basins in the Khasi Hills, Meghalaya. It was described as Platycara nasuta by McClelland in 1828 from Kasya mountains, Assam (now Khasi Hills, Meghalaya). The type specimens of G. nasuta do not exist, and its identity is not yet clear. The study has been...

Fishes under genus SchizothoraxHeckel, under family Cyprinidae and sub-familySchizothoracinae are the specialized group of fishes inhabiting snow fed torrential streams of Himalayas and Central Asia in higher altitudes. This Schizothoraxspecies adapts to a special type of environment and are considered as dominant fishes of mountain streams.A total...

Labeonid fishes under genus Garra Hamilton belonging to the family Cyprinidae and order Cypriniformes, are characterised by a slender sub-cylindrical body, presence of a suctorial mental disc and horizontally expanded paired fins. There are 78 valid species of Garra in India, of these 49 species are described from the Northeastern India. The short...

Amtyrngui River at Amdoh village West Jaińtia Hills lies 87 km from Shillong, the capital of Meghalaya, India. It is a perennial river which is strong during the summer season and lean during the winter months. The present study was carried out at Amtyrngui River at Amdoh village West Jaińtia Hills from October 2021 to March 2022 in two stretches o...

The spined loaches under genus Lepidocephalichthys Bleeker belong to family Cobitidae, are colourful freshwater fishes with both ornamental and food values and characterized by the presence of a sub-orbital spine and pectoral rod formed by the fused of last two pectoral fin rays in males. A total of 20 valid species are under this genus all over wo...

Fishes under genus Psilorhynchus McClelland (Cypriniformes: Psilorhynchidae), commonly known as river torrent minnow, are colourful ornamental fish characterized with horizontally placed widespread paired fins, arched dorsal and flattened ventral profile of body. There are 32 valid species of Psilorhynchus across the globe, of which 20 species have...

Fishes of the genus Schistura McClelland, are colourful small nemacheiline fishes found in the hill streams and rivers. They are characterized by moderately arched mouth, medially interrupted lower lip without forming two lateral triangular pads, median notch in lower jaw present or absent and processus dentiformes well developed to feebly develope...

Pseudolaguvia meghalayaensis, a new diminutive sisorid catfish, is described from the confluence of Rongkil and Rongdal streams (tributaries of the Brahmaputra River) in Meghalaya, India. It is distinguished from its congeners by a combination of characters: striae in thoracic adhesive apparatus strongly anastomosing and break up into small rounded...

Cobitids show a great diversity and polymorphism in the number of barbels, the blotches on the body, and the presence and absence of ocellus on the caudal fin. Some of the species under this group are facing taxonomic ambiguity due to lack of evidence of the representative species, polymorphic forms and increasing threats to the species due to habi...

Northeastern India, a part of the Indo-Burma mega biodiversity hotspot of the world, is blessed with five different drainage systems viz. the Brahmaputra, the Barak-Surma-Meghana, the Chindwin, the Kaladan, and the Karnaphuli. The colourful diminutive catfishes of the genus Pseudolaguvia are one of the representative freshwater fish fauna of the re...

Guwahati, a city of 2 million residents is the largest city in northeastern part of India. Situated by the side of River Brahmaputra, the city is of an undulated topography with some hillocks and wetlands. The considerable area of the city is still forested and seven reserve forests are located within the city. The forested topography of the city o...

Studies on the avian fauna of Dhir Beel revealed 208 species of birds belonging to 43 families. Out of these, 15 species are purely aquatic birds. As the water of the wetland is clear, rich in dissolved oxygen and supports variety of aquatic weeds and fishes, it has been found to be suitable for birds and attracts many migratory birds like brahminy...

Identification of freshwater fishes of Northeast India

Schistura phamhringi, new stone loach, is described from Dutah Stream, tributary of the Yu River (Chindwin basin), near Larong Village, Chandel District, Manipur, India. It is distinguished from all its congeners by a unique combination of characters: 6-7 black saddles, each continued on both flanks forming broad diamond-shaped black bars with narr...

A new loach, Schistura liyaiensis, is described from the upper reaches of the Barak River at Liyai village, Senapati District, Manipur, India. It is distinguished from its congeners in having a unique combination of characters: 7-9 brown saddles each continuing onto the flank and forming 7-8 broad to slightly narrow bars with a rounded ventral marg...

Two new species of Schistura are described from the Koladyne basin of Mizoram, India. Schistura nebeshwari is distinguished from its congeners by the combination of the following characters: a prominent dorsal adipose crest on the caudal peduncle, 11-14 dark olivaceous bars on the body, the entire ventral surface of head with numerous small melanop...

Schistura paucireticulata, new species, is described from the Tuirial River in Mizoram, India. It is distinguished from its congeners by a combination of characters: 8-9 brown bars on the body, bars in front of the dorsal fin divided into 2-3 small bars forming a reticulations; basicaudal bar black, dissociated; dorsal fin spotted, with 4 simple an...

Schistura ferruginea, new species, is described from a small rivulet of the Barak River drainage (Brahmaputra basin) at Maram, Senapati district, Manipur, India. It is distinguished from congeners by a unique combination of characters: no axillary pelvic lobe, a patch of dusky pigment deep under the skin at mid-lateral line above pectoral fin, 17-1...

Schistura porocephala, a new nemacheilid species, is described from a stream that drains into the Mat River (Koladyne basin), India. It is characterized by the presence of prominent pores in the cephalic lateral line system; an incomplete lateral line; 20–23 thin dark olivaceous bars on the body, often bifurcated from the dorsolateral region; a dep...

The paper describes Physoschistura tigrinum, a new nemacheilid from the Chindwin basin in Manipur, India. The new species is distinguished from congeners in having 9 1-2 branched dorsal-fin rays; 12-14 irregularly arranged light reddish brown bars on the side, some of which are broken into blotches and short bars; 5-6 dark brown saddles; forked cau...

A new species of nemacheilid, Physoschistura dikrongensis, is described from the Brahmaputra basin in Arunachal Pradesh, India. It is easily distinguishable from congeners in having two V-shaped dark brown bars across the caudal fin towards the distal end; 11-15 irregular bars on the body; dark brown mottled markings on the head; 4 simple and 8 1/2...

A new nemacheilid loach, Schistura obliquofascia, is described from Kalsa, a stream near Chanfi, tributary of Gola River, Ganga basin in Uttarakhand, India. The new species is readily distinguished from congeners by the following combination of characters: 12-14 oblique olivaceous dark bars on the body and three rows of black spots on the dorsal fi...

Schistura koladynensis, new species, is described from the Koladyne River in Mizoram, India. It is distinguished from its congeners by a combination of characters: 10-11 brown bars on the body, the black bar on the caudal-fin base not extending its full height, specific arrangement of vertical rows of coloured spots on the caudal fin, 8 1 /2 branch...

Physoschistura chindwinensis, a new balitorid species, is described from the Chindwin basin, Manipur, India. It is easily distinguished from congeners by the combination of characters: a dorsal fin with three simple and 8½ branched rays; body with 13–17 dark-brown bars on the sides, and 11–16 dark-brown saddles; interorbital space with a rectangula...

Physoschistura tuivaiensis is described from Likhailok on the Tuivai River, a tributary of the Brahmaputra River in southern Manipur, India. It is distinguished from congeneric species except P. shanensis and P. yunnaniloides by having a complete lateral line. It can be distinguished from those two species by the presence of 12-14 dark olivaceous b...

Physoschistura tuivaiensis is described from Likhailok on the Tuivai River, a tributary of the Brahmaputra River in southern Manipur, India. It is distinguished from congeneric species except P. shanensis and P. yunnaniloides by having a complete lateral line. It can be distinguished from those two species by the presence of 12-14 dark olivaceous b...

Preliminary survey of the nemacheiline fishes in Manipur has revealed the occurrence of 10 species under the genus Schistura, of which S. manipurensis, S. nagaensis, S. khugae, S. kangjupkhulensis, S. sikmaiensis, S. reticulata are distributed in the Chindwin drainage while S. minutus, S. trigrinum, S. fasciata and S. chindwinica, in the Barak drai...

A new nemacheiline fish, Schistura fasciata sp. nov. is described here from Barak River (Brahmaputra Drainage) of Manipur, India. The species is characterized by 11-13 dark brown transverse bars on the flank, moderately high adipose crest on dorsal and ventral side of caudal peduncle, three prominent dark spots at the base of dorsal fin, dorsal fin...