The Cincticostella insolta complex (Ephemeroptera: Ephemerellidae) is reviewed based on new and historic material, as well field observations. Three species are described viz., C. richardi Martynov Palatov, sp. nov. ranga Selvakumar Subramanian, from India, sivaramakrishnani Nepal. A correction of the original description some additional distinguishing features given for braaschi Jacobus McCafferty, 2008. (Allen, 1971), bifurcata Xie, Jia, Chen, Zhou, 2009 recorded Indian subregion first...

A checklist of the dragonflies and damselflies occurring in Bangladesh, Bhutan, India (including Andaman Nicobar Islands), Nepal, Pakistan Sri Lanka is presented. In total 588 559 full species) taxa are known to occur region which 251 (species & subspecies) single country endemics. Recent taxonomic changes relevant area summarized. Sixteen synonymized a all synonyms established since 1950 provided. Information given on available larval descriptions including list genera present for no...

The Metrocoris fauna of India is reviewed and five new species are described from India: M. murtiensis Basu, Polhemus Subramanian sp. nov. belonging to the nigrofasciatus group, dinendrai darjeelingensis compar deceptor (previously treated as quynhi Tran & Zettel in Basu et al., 2015) anderseni lavitra Polhemus, Saha nov., which does not fit well into any currently established group. proposed compared all other known species, a key Indian provided, accompanied by table for comparison...

Prosopistoma someshwarensis n. sp. is described based on larvae collected from the streams of central Western Ghats, and P. indicum Peters, 1967 redescribed fresh material additional localities southern Ghats peninsular India. A brief discussion their ecology biogeography, a key to Indian species Prosopistoma, are also provided. The may be distinguished one another segmentation antennae, carapace colourations, setation tibiae mandibular canines, morphology gills 2.

A new species of Choroterpes Eaton, 1881 is described based on the larvae from India. (Choroterpes) kaegies sp. n. can be distinguished other known subgenus by following combination characters: (i) anteromedian emargination labrum broad; (ii) each femur with a dark brown spot at middle and near apex; (iii) gill 1 single slender (iv) upper lower lamellae gills 2–7 3 apical processes, median process relatively longer than laterals. key to in India also provided.

A new species of Cyclogomphus Selys, 1854 is described from the Western Ghats India based on male and female specimens collected Goa Kerala states. The differs all known in shape anal appendages as well thoracic abdominal markings. We also provide here an updated key to comment status vesiculosus 1873.

A new species belonging to the subgenus Dilatognathus of genus Choroterpes is described based on larvae collected from Andaman and Nicobar Islands. (Dilatognathus) nicobarensis n. sp. can be distinguished all other by absence a tusk maxillary apex, has ventro-apical flange dentiseta directed distally, as in than Dilatognathus. nigella (Kang & Yang 1994) newly recorded Arunachal Pradesh, Meghalaya West Bengal. Remarks evolution mouth apparatus are given.

A new species belonging to the subgenus Isonychia, of genus Isonychia Eaton, 1871, is described based on larvae and imagoes collected from Moyar River, Nilgiri District, Tamil Nadu, India. The I. moyarensis n. sp. can be distinguished other Oriental (Isonychia) by combination characters: (i) forewing with rusty brown maculae in costal, subcostal, median areas; (ii) femur tibia brown, fore leg pale, apices tarsal segments brownish; (iii) males distal angles penes rounded, without serrations;...

A new species of Gomphidia Selys, 1854 is described from southern Western Ghats, India based on a male specimen. The very distinct all the known Indian subcontinent. Revised keys to males and females Sri Lanka are provided.

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 dibruensis nov.; first country records of Teloganopsis jinghongensis (Xu, You Hsu, 1984) Hyrtanella grandipennis (Zhou, Su Gui, 2000). Description nov. is based on material Thailand, Nepal; described India. For now, the tribe in...

A new species of the genus Baetiella is described based on larvae collected from Arunachal Pradesh, India. subansiri Vasanth, Selvakumar & Subramanian n. sp. can be distinguished by following combination characters: (i) gills (or gill sockets) segments I–VI; I–V elongate, without tracheation, with numerous scattered pores surface and smooth fine simple setae along margin; VI reduced; (ii) posterior margin metanotum abdominal terga I–II each a single posteromedian protuberance, III–IX...

Orthetrum andamanicum sp. nov. (holotype ♂: India, Andaman and Nicobar Islands, South island, Chidiyatapu, N 11.51, E 92.71; 08-xii-1998; deposited in RMNH, Leiden; RMNH.INS.1152911), is described as new to science. Based on additional photographic records, notes mature males’ life colouration, distribution habitat of this endemic are provided.

Soa papanasam sp. nov. is described and illustrated based on both sexes from Kalakkad Mundanthurai Tiger Reserve Meghamalai Wildlife Sanctuary, Tamil Nadu, India. It differs all other known species of Soa, by hindwing vein R1 originating proximal to M1 distal M2. This the first genus

A new species of Notacanthurus Tshernova, 1974 is described based on larvae from India. pange Vasanth, Selvakumar & Subramanian sp. nov. can be distinguished all known by the following combination characters: (i) gill lamellae 5–6 with accessory lobe; (ii) dorsal surface femora scattered spatulate setae (iii) male genitalia having penis lobes fused, ‘V’ shaped apically blunt me­dian pair spine-like titillators subapically and mesally; (iv) labrum anterior portion straight laterally...

A new species of Platybaetis viz., P. selvai sp. nov. is described herein based on larval collections from Tangon stream in the state Arunachal Pradesh Eastern region Indian Himalaya. It can be differentiated by following combination characters: (i) posterior margin abdominal segments IX with rounded 'U shaped spines; (ii) anterolateral gills IVII minute setae; (iii) claw 78 denticles; (iv) paracercus composed 1011 segments; (v) hindwing pads reduced, small. Brief ecological notes are appended.

Three new species of Leptophlebiidae viz., Choroterpes (Choroterpes) andamanensis Vasanth, Subramanian Selvakumar n. sp., Edmundsula meghamalaiensis sp. and Megaglena agasthiya are described based on our recent exploration mayflies from the streams Andaman Island, Tamil Nadu Kerala part southern Western Ghats. The genus Peters Edmunds, 1970 has extended distribution in peninsular India as represented by occurrence M. Larval key is provided to known subgenus along with map species.

The male and female of Orthetrum erythronigrum sp. nov. are described from Great Nicobar Island believed to be endemic the Islands archipelago (holotype ♂, India, Andaman Islands, Island, Biosphere Reserve, N 6.99067, E 93.871363; 01-xii-2018; deposited in ZSI, SRC, Chennai, India). this new species is easily distinguished other known by its black abdomen with contrasting crimson belly. Female large size, non-metallic head, thorax red a distinct pattern. Based on field observations...

Three new species of Protosticta Selys, 1885 (Odonata: Zygoptera: Platystictidae) from the Western Ghats biodiversity hotspot in India: P. cyanofemora sp. nov. (wet evergreen forests Shendurney Wildlife Sanctuary, Kollam, Kerala and Kalakkad Mundanthurai Tiger Reserve, Tirunelveli, Tamil Nadu), myristicaensis (Myristica swamp at Kathalekan, Shivamogga, Karnataka) sholai (montane sholas Upper Manalar, Meghamalai Theni, Nadu) are described illustrated. We compare these three with other spp....

We present the description of a new mayfly species, Platybaetis arunachalensis sp. nov., based on larval specimens collected from Arunachal Pradesh, India. Additionally, we provide first complete and record uenoi Müller-Liebenau, 1980, recently Nagaland, This study includes taxonomic updates for genus 1980 in India, along with distribution map species ecological insights into their habitats. Our work enhances understanding diversity contributing valuable information future conservation studies.

Two new species of Hemipsocus Selys-Longchamps, 1872 are described here based on specimens collected from the forests Jharkhand, Kerala and Tamil Nadu states, India. The species, H. mockfordi sp. nov. menoni nov., differentiated other members this genus by following characteristics; female subgenital plate with two apical lobes, straight strongly chitinized male paraproctal horn in epiproct exhibits well-developed scales that extend anterior section towards median region