Bikramjit Sinha

• PhD
• Scientist at Zoological Survey of India

Oreoglanis pangenensis, new species, is described from the Pange River, upper Brahmaputra River basin, Apatani plateau, Lower Subansiri District, Arunachal Pradesh, India. It belongs to the O. siamensis species group and is distinguished from all its congeners by a combination of two types of projections on the ventroposterior margin of the maxilla...

Of late, interest in alternative eco-friendly rodent control methods have paced up owing to the known shortcomings of rodenticides, particularly anticoagulants. The present study reports 15 such non-chemical rodent control methods practiced in the upland areas of Northeast India. Most of these (80%) methods include indirect means of rodent control...

Two new species of sisorid catfish, Pseudolaguvia magna and P. jiyaensis, are described from the upper Brahmaputra River basin in Arunachal Pradesh, northeastern India. Pseudolaguvia magna differs from its congeners by its much larger size (47.0 mm standard length vs. a maximum of 35.6 mm), by having a broader rhomboid thoracic adhesive apparatus,...

The Maoson horned frog, Xenophrys maosonensis (Bourret, 1937) was originally described as Megophrys longipes maosonensis from Vietnam having distribution in China. Saikia et al. (2019) reported its occurrence from Arunachal Pradesh as a first country record for India with the inclusion of genetic data and morphological descriptions. They arrived at...

Cladocera is one of the most important groups of microscopic organisms in freshwater ecosystems with regard to their interaction along different trophic levels and ensuring smooth energy transfer in the food chain. Out of the more than 700 species of Cladocera known globally, about 131 species are recorded from India. Of the Indian Cladocera, about...

Amphibia is a taxon in peril due to its dependency on aquatic habitats which are prone to rapid environmental degradations and climate change. Any effort to comprehend their interactions with the environment and to understand their conservation needs, a proper inventory of their diversity is the need of the hour. In the present review paper, effort...

Spread over two biodiversity hotspots, the North Eastern Region of India is home to diverse ethnic communities which depend upon wild harvests to sustain a part of their nutritional and medicinal requirements. These communities are reported to harvest at least 17 species of frog species from the wild. This includes two endemic and one vulnerable sp...

A study was undertaken to document the diversity of Rotifera in Ganga Lake, Itanagar as no such information was available. Plankton samples were collected quarterly during 2018-19 using a Nylobolt plankton net and Rotifera taxa were identified with the help of standard literature. The present study recorded 16 species of Rotifera belonging to 10 ge...

This paper confirmed the occurence of Sylvirana lacrima (Amphibia: Anura: Ranidae) in Arunachal Pradesh, India based on morphological and molecular studies.

Seventeen nominal species of the ranid frog genus Amolops Cope, some of which are based on unverified historical records, are reported from India. Herein, we describe a new species of Amolops of the marmoratus group from a cave ecosystem. This is an uncommon habitat for this group of frogs, which is commonly found around cascades. The Siju Cave, fr...

With the descriptions of a large number of Amolops species in the last two decades, the historical reports of Amolops species from India are in a state of flux, resulting in doubts regarding the specific identities of many species of this genus from the country. Due to their morphological crypticity, species belonging to Amolops are most often diff...

The cascade-dwelling frog genus Amolops is known for its range of distribution concentrated in China, India, Myanmar and Nepal. The first Amolops species described from India was in 1871, and since then, 11 species have been described from the country. Being morphologically cryptic and with a preference for cascade habitats, identification of Amolo...

Seventeen nominal species of the ranid frog genus Amolops Cope, some of which are based on unverified historical records, are reported from India. Herein, we describe a new species of Amolops of the marmoratus group from a cave ecosystem. This is an uncommon habitat for this group of frogs, which is commonly found around cascades. The Siju Cave, fr...

The present communication is the first report on the ichthyofaunal diversity of Anjaw, the easternmost district of India which is strategically located in the tri-junction of India, China and Myanmar. The results are based on a preliminary survey carried out during November-December 2014 mainly in the Lohit River and its tributaries. The study show...

The present study on the amphibians of Arunachal Pradesh has been carried out by making fresh collections from more than 100 localities in the State, besides the studies on the museum specimens of this group from the State housed in APRC/ZSI, Itanagar, DNGC, Itanagar and NERC/ZSI, Shillong. Altogether, 433 specimens of anurans were studied and base...

As part of ongoing exploration of the mayflies of streams and rivers of Indian Himalayan regions, we describe two new species of the genus Tenuibaetis based on recently collected materials from Western Himalaya viz., Tenuibaetis himani Kubendran, Vasanth & Subramanian sp. nov. and Tenuibaetis kangi Kubendran, Vasanth & Subramanian sp. nov. Additi...

The fascinating world has more than 700 species of leeches (Annelida: Hirudinea). On the other hand India possesses 83 species. There are two records terrestrial leech species from Nagaland: Haemadipsa satyanarayanai Mandal et al., 2020 and H. zeylanica dhritii Mandal et al., 2022. The authors had the opportunity to establish a new leech for scienc...

No abstract

The distribution of the Assam leaf turtle, Cyclemys gemeli in Arunachal Pradesh was not certain for lack of any tangible report. The occurrence of the species in this Himalayan state based on incidental collection of two individuals, one juvenile and one adult from a swampy area from the backyard of Zoological Survey of India campus at Itanagar in...

The torrent-dwelling frog genus Amolops is represented by 13 species in India, including type localities for 11 species. Based on recent field surveys and subsequent phylogenetic studies of specimens collected, we confirm the presence of A. aniqiaoensis Dong, Rao, and Lü 2005, which was described from Aniqiao, Xizang, China, in India. We also repor...

With rapid climate change, and in view of the high endemicity and vulnerability, including anthropogenic pressures such as habitat destruction, unplanned urbanization, pollution of wetlands, harvest from wild, etc. the amphibian diversity from northeast India is facing an unprecedented risk of local extinction. Therefore, there is an urgent need to...

The present study is based on herpetofaunal observations made from November 2019 to November 2020, as well as the study of both collections made from the study area and deposited in the National Zoological Collection (NZC) of the Zoological Survey of India (ZSI), APRC, Itanagar. The herpetofaunal diversity of ZSI campus, Itanagar, comprises 37 spec...

In the last decade, there has been a major revision in the cryptic species complexes of the genus Megophrys Kuhl & Van Hasselt (and earlier Xenophrys), resulting in reports of many new species and new records from Arunachal Pradesh, India. Here we report additional information on the morphological variations of the recently described species Megoph...

Seven species of the genus Epeorus Eaton, 1881 are described so far from India of which redescription is attempted herein for 3 species viz. E. (C.) psi Eaton 1883, E. (E.) gilliesi Braasch 1981, E. (E.) petersi Sivaruban, Venkataraman & Sivaramakrishnan 2013 based on the fresh collections. Four species viz., E. (E.) aculeatus Braasch 1990, E. (E.)...

The Hyrtanellini (Ephemeroptera: Ephemerellidae: Ephemerellinae) from India and related regions are reviewed, including three new species viz., Serratella palatovi Martynov, Selvakumar & Jacobus, sp. nov., Torleya simbalbarensis Selvakumar, Subramanian, Martynov & Jacobus, sp. nov., and Torleya dibruensis Selvakumar, Martynov & Jacobus, sp. nov.; a...

The state of Arunachal Pradesh, in the extreme northeast of India is located within one of the global biodiversity hotspots of the world-the Eastern Himalayas. The state is blessed with variety of aquatic resources in the forms of streams, falls, rivers and lakes. Amongst the various freshwater lakes within the state, Ganga Lake (GyakarSinyik) is t...

A new species of Notacanthurus Tshernova, 1974 is described based on larvae from India. Notacanthurus pange Vasanth, Selvakumar & Subramanian sp. nov. can be distinguished from all known species of Notacanthurus by the following combination of characters: (i) gill lamellae 5-6 with accessory lobe; (ii) dorsal surface of femora with scattered spatul...

The dicroglossid frog Nanorana conaensis was described from the high elevation mountain ranges of Tibet about three decades ago. Recently this species was reported from India as a first record for India. In the present account, detailed morphological data, genetic data and phylogenetic status has been provided with a photograph of live animal in or...

A new species of the genus Baetiella is described based on larvae collected from Arunachal Pradesh, India. Baetiella subansiri Vasanth, Selvakumar & Subramanian n. sp. can be distinguished by the following combination of characters: (i) gills (or gill sockets) on segments I–VI; gills I–V elongate, without tracheation, with numerous scattered pores...

The moss and leaf litter dwelling small frog group under genus Liurana are represented by only 4 species, all described from China; of which L. medogensis is known to occur in India. In recent years, surveys into Talley Valley Wildlife Sanctuary of Aruanchal Pradesh have revealed the occurrence of L. medogensis along with 3 hitherto unknown species...

Megophrys longipes maosonensis, described from Mao Son, Vietnam is long considered to be a junior synonym of Megophrys major species complex. However, recently, it has been resurrected from its synonymy into a valid species, with its distribution restricted to Vietnam and the adjacent areas of China. In 2015, we have made a sample collection of Meg...

67 species under 38 genera belonging to 14 families of 3 Orders of fishes from the Lower Subansiri district of Arunachal Pradesh were reported. Cyprinidae with 38 species followed by Nemacheilidae with 7 species and Sisoridae with 6 species are the dominant families of the district. Garra is the dominat genera with 13 species followed by Barillius,...

Two new species of Aborichthys are described from the Pange River of the Brahmaputra River basin, in Arunachal Pradesh, northeastern India. Aborichthys kailashi, new species, is characterized in having a prominent dorsal and ventral adipose crest, 28-36 black bars on the body, an incomplete lateral line interrupted before pelvic-fin origin and vent...

A new species of the genus Garra is described from the Ranga River of the Brahmaputra basin, Arunachal Pradesh, northeastern India. Garra magnacavus, new species, differs from its congeners in having an incipient proboscis with a transverse lobe, 15−19 rounded large pits on the snout, weakly developed non-fleshy central callous pad, and an elongate...

The endemic Asian megophryid genus Megophrys is represented by a total of 77 species of which 14 are reported to occur in India. Due to its close proximity to China, Arunachal Pradesh- the easternmost state of India- is believed to harbor many species of amphibians endemic to China. One such Megophrys species endemic to China, Megophrys pachyproctu...

Garra ranganensis, is described from the Ranga River in the upper Brahmaputra River drainage in Arunachal Pradesh, northeastern India. Garra ranganensis is distinguished from its congeners belonging to Brahmaputra, Chindwin-Irrawaddy basins in north eastern India, from the Upper Irrawaddy basin, China and Southeast Asia (those bearing well develope...

The Cincticostella insolta complex (Ephemeroptera: Ephemerellidae) is reviewed based on new and historic material, as well as new field observations. Three new species are described viz., C. richardi Martynov & Palatov, sp. nov. and C. ranga Selvakumar & Subramanian, sp. nov. from India, and C. sivaramakrishnani Martynov & Palatov, sp. nov. from Ne...

A new record of monogeneric family Vietnamellidae (Insecta: Ephemeroptera) is established for India with Vietnamella sp. A described based on the larvae from Arunachal Pradesh, India. This species can be distinguished from other known species of this genus in the larval stage by the following combination of characters: (i) outer pair of projections...

This paper gives a brief review of the studies on zooplankton fauna of Arunachal Pradesh, the major shareholder of the eastern Himalaya biodiversity hotspot. Altogether, 66 species of zooplankton (45 Rotifera, 20 Cladocera, & one Copepoda) have been recorded along with their distribution in the state, wherever available. It is apparent that there i...

Until 2016, only two species of Odorrana have been reported from Arunachal Pradesh. In 2017, a new species of Odorrana was discovered from the State, named O. arunachalensis. In this current paper, we are reporting on the occurrence of a fourth species of Odorrana, O. livida from the state occurring in Lower Subansiri and East Kameng districts. Inc...

The cascade frogs of the genus Odorrana are adapted to life in torrential streams, and are expected to be widely available across the mountainous region of India. However, only 4 species out of the 58 globally recognized species of Odorrana have been reported from the country. Of these 4 species found in the country, only 2 species were originally...

A single male specimen of Leptobrachium bompu was collected from Talle Valley Wildlife Sanctuary, Lower Subansiri District, Arunachal Pradesh in 2015. This is the first report of this species after its original description in 2011 based on a male specimen. The present collection locality is about 200km from the type locality. Additional notes on mo...

The amphibian diversity of Arunachal Pradesh has increased by 3 species after studying the backlog collection of APRC/ZSI, Itanagar. The 3 species belongs to 3 genera, 3 families and 1 order. Of the 3 species, 1 species is least concern, 1 is data deficit and 1 not evaluated as per IUCN.

A new species belonging to the subgenus Dilatognathus of the genus Choroterpes is described based on larvae collected from Andaman and Nicobar Islands. Choroterpes (Dilatognathus) nicobarensis n. sp. can be distinguished from all other species of Dilatognathus by the absence of a tusk on the maxillary apex, has ventro-apical flange and dentiseta di...

The paper reports the first-ever comprehensive picture of the fish diversity of Lower Subansiri district, Arunachal Pradesh. A to total of 120 fishes belonging to 71 genera, 26 families and 7 orders have been reported. The order cypriniformes accounts for about 53% of the total fishes and cyprinidae is the most dominat family wiith 49 species. Garr...

Physoschistura walongensis, new species, is described from the bank of the Lohit River (upper Brahmaputra River basin) in the eastern most part of the state Arunachal Pradesh at an altitude of 1096 m above sea level. The new species is distinguished from its congeners by the following combination of characters: an incomplete lateral line extending...

Glyptosternines are highly specialized sisorid catfishes with greatly depressed body profiles; enlarged, horizontally extended paired fins, modified for adhesion, typically inhabiting torrential waters in rocky mountain streams and rivers. Their range of distribution extends from the upper reaches of the Amu Darya River drainage in Turkmenistan sou...

Substantial studies have been made on the ichthyofauna of Arunachal Pradesh and every year some new species are being described from the state. However, a common gap in all the studies been the non-exploration of the lentic bodies of the state. The present paper reports the ichthyofauna of two lentic water bodies of East Siang district of Arunachal...

Given that transnational movement of organic products is also governed by standards, establishing a foothold in the international market for organic products, India too has to comply with these norms. Exploring the process, this chapter observes that as it is mandatory to get the organic products certified through an appropriate/authorized organic...

A new glyptosternine catfish, Creteuchiloglanis arunachalensis is described on the basis of a single specimen collected from the upper Brahmaputra River drainage, northeastern India. The new species is distinguished from its congeners by the following characters: shorter adipose-fin base (25.9 vs. 26.2–37.3 % standard length; SL) except C. longipec...

Knowledge of national research trends and thrust areas as well as R&D capability in solar photovoltaics has become all the more essential following the launching of the National Solar Mission in 2010. The present study analyzes the status of solar PV research in India encompassing aspects such as pattern of output, impact of research, thrust of res...

This study reports the toxicity of Albizia odoratissima (a plant used by indigenous farmers) to the 3rd instar larvae of Pieris brassicae - a major pest of cruciferous crops. About 53% larval mortality was recorded after 72 h exposure to 4% bark powder. Methanolic extract of the bark caused almost two times more mortality than that caused by the ba...

Efficacy of the aqueous crude extracts of Eupatorium adenophorum Spreng (Asteraceae) leaves was tested against the mustard aphid, Lipaphis erysimi Kalt (Homoptera: Aphididae) at concentrations of 1,2 and 4% (v/v) in both laboratory and field conditions. In both the conditions, higher concentration of the crude extract caused significantly (P<0.05)...

A combined realization of the negative effects of chemical pesticides and the positive attributes of biopesticide have led to an intensive research programs by both public and private institutions across nations. This has generated a knowledge pool and accumulated vast scientific literature. This paper tries to capture the nature of basic research...

This article reports a comparative analysis of the thrust in solar photovoltaic (PV) research during 1981-88 and 2001-08. Global solar PV literature in the later period recorded 4.5-fold increase over those in 1981-88. USA leads all the countries in terms of absolute number of publications as is the case in other areas of basic sciences. But its re...

Knowledge of national research trends and thrusts as well as R&D capability in solar photovoltaics has become all the more essential post launching of the National Solar Mission. The present study is perhaps the first attempt that analyzes the status of solar PV research in India encompassing aspects such as pattern of output, impact of research, t...

Estimated potential of solar energy in India is nearly 20,000 times more than the presently installed capacity of 137600 MW of electricity (as on 2005). Higher cost per unit is one of the limiting factors in harnessing the full potential of solar energy. A practical option to reduce cost is technological switch over in solar cell material from sili...

The reformation of the science and technology (S&T) system and the national system of innovation has been considered as the two most critical channels through which China promoted its economic and social reforms, and helped transformation into a dynamic market economy and its integration with the global economic system. That China is employing tech...

Formal innovations do not come about overnight and such innovations attain a state of stagnancy after some time. This paper discusses the possible approaches of formalizing the informal innovations in the agriculture sector especially in sustainable pest management. Out of about 60 informal innovations in pest management recorded some are common to...

Formal innovations do not come about overnight and such innovations attain a state of stagnancy after some time. This paper discusses the possible approaches of formalizing the informal innovations in the agriculture sector especially in sustainable pest management. Out of about 60 informal innovations in pest management recorded some are common to...

Although potential of solar energy in India is estimated as nearly 20,000 times more than the present installed capacity of electricity (137600 MW as in 2005), higher per unit cost limits its full realization. Research in solar energy is thus a priority area for the country. Analyses of status of solar energy research using data on publications sho...

There has been a paradigm shift in recent years towards the use of natural, reliable, and sustainable products in grain protection; from the conventional use of synthetic toxic substances. The role of traditional knowledge in storage protection is being increasingly realized across the globe. The age-old traditional post-harvest pest management met...