Redescriptions of Indian species of Nigrobaetis Kazlauskas (in Novikova & Kluge) 1987 (Ephemeroptera, Baetidae).

The European species Nigrobaetis gracilis (Bogoescu & Tabacaru 1957) and more than 19 Asian and African species of Nigrobaetis Kazlauskas (in Novikova & Kluge) 1987 belong to the subgenus Margobaetis Kang & Yang 1994, which is characterized by peculiar asymmetric eggs and narrow paraglossa of larval labium. A new synonymy is established: Nigrobaetis (Margobaetis) minutus (Mller-Liebenau 1984) = N. paramakalyani Kubendran & Balasubramanian in Kubendran et al.

Contribution to the knowledge of the subgenus Tenuibaetis Kang & Yang 1994 (Ephemeroptera, Baetidae, Baetis s. l.).

The taxon Tenuibaetis Kang & Yang (in Kang, Chang & Yang) 1994 is accepted here as a subgenus of the genus Baetis Leach 1815, but not as a genus. In connection with this, new combinations are established: Baetis (Tenuibaetis) parvipterus (Fujitani et al. 2011) comb.

Redescription of the subgenus Rhithrogeniella Ulmer 1939 (Ephemeroptera, Heptageniidae, genus Ecdyonurus) based on reared specimens from India and Thailand.

Rhithrogeniella Ulmer 1939 is treated here as a subgenus of the genus Ecdyonurus Eaton 1868 (s. l.).

First report of Cheleocloeon Wuillot & Gillies 1993 (Ephemeroptera: Baetidae) from the Oriental Region.

A new species, Cheleocloeon vaigaiensis sp. n., is described from Southern India based on larvae, imagines and subimagines of both sexes associated by rearing.

Diagnosis, variability, distribution and systematic position of Labiobaetis pulchellus (Müller-Liebenau & Hubbard 1985) (Ephemeroptera, Baetidae, Baetis s. l.).

A new synonymy to Labiobaetis pulchellus (Müller-Liebenau & Hubbard, 1985) (= L. soldani Kubendran et al. 2014, syn.

The unexpected discovery of the Afrotropical genus Tricorythus Eaton, 1868 (Ephemeroptera: Tricorythidae) from the Oriental region with description of a new species.

Tricorythus meenakshi sp. n., is described based on all the stages from Tamil Nadu, Southern India.

Contribution to the knowledge of Teloganodidae (Ephemeroptera, Ephemerelloidea) of India.

Two new species of Sartori, 2008 and a new species of Eaton, 1882 are described from India; they are Martynov & Palatov, from Himalayan region (Uttarakhand), Sivaruban, Martynov, Srinivasan, Barathy & Isack, , and Sivaruban, Martynov, Srinivasan & Isack, from the Tamil Nadu part of the Western Ghats. Thus, for now, the Teloganodidae fauna of India includes 11 species. appears to be significantly extend northward the known distribution of .

Review of the subgenus Euthraulus (Ephemeroptera, Leptophlebiidae, genus Choroterpes) from the Western Ghats (India).

The subgeneric name Monochoroterpes Kluge Jacobus 2015 is regarded here to be a junior synonym of Euthraulus Barnard 1932 (syn. n.), based on a wider understanding of more species from each group.

A new species of Nigrobaetis Novikova amp; Kluge, 1987 (Ephemeroptera, Baetidae) from Tamil Nadu, India.

Nigrobaetis klugei sp. nov. is described based on nymphs from the Sastha falls of Western Ghats, Southern India.

A new species of Clypeocaenis Soldn 1978 (Ephemeroptera: Caenidae) from Tamil Nadu, India.

Clypeocaenis malzacheri sp. nov. is described from the Kottakudi River in southern India, based on larvae and eggs.

A new species of Sparsorythus Sroka amp; Sold, 2008 (Ephemeroptera: Tricorythidae) from Tamil Nadu, India.

Sparsorythus srokai sp. nov. is described from the Veerapandi River, Theni district, Tamil Nadu, India based on nymphs of both sexes.

A new species of Dudgeodes Sartori, 2008 (Ephemeroptera: Teloganodidae) from Megamalai hills of southern Western Ghats, India.

Dudgeodes sartorii sp. nov. is described based on nymphs from the Megamalai hills of Western Ghats, Southern India.

A new charismatic Caenis Stephens, 1835 (Ephemeroptera: Caenidae) from Southern India.

Caenis americani sp. nov. is described based on larvae and female imagoes from the Mangalamkombu stream of Southern India.

A new species of Sparsorythus Sroka amp; Soldán, 2008 (Ephemeroptera: Tricorythidae) from Eastern Ghats of Southern India.

A new mayfly species, Sparsorythus sivaramakrishnani sp. nov. from the stream of Pullian cholai, Thuraiyur, Namakkal district, Tamil Nadu, India is described based on male and female nymphs.