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. 2015 = N. sumbensis Kaltenbach & Gattolliat 2023, synn.n.; winged stages (male and female imagines and subimagines) and eggs of this species are described for the first time. N. (M.) minutus is widely distributed on Oriental Region, being revealed in West Malaysia, Southern India, Sumba and Sulawesi islands in Indonesia. Winged stages (male and female imagines and subimagines) and eggs of Nigrobaetis (Margobaetis) klugei Sivaruban et al. 2022 are described for the first time.
Rhithrogeniella Ulmer 1939 is treated here as a subgenus of the genus Ecdyonurus Eaton 1868 (s. l.). The subgeneric name Rhithrogeniella is a senior synonym of Afghanurus Demoulin 1964 syn. n., ...Paracinygmula Bajkova 1975 syn. n. and Nixe Flowers 1980 syn. n. Additional description of Ecdyonurus (Rhithrogeniella) ornatus (Ulmer 1939) is given based on imagines and subimagines of both sexes reared from larvae in India and Thailand; lectotype of this species name is designated. Synonymy of E. (Rh.) ornatus and E. (Rh.) tonkinensis Soldán & Braasch 1986 is established (syn. n.). Male and female imagines and subimagines of an unnamed species of Rhithrogeniella are reported from India.
A new synonymy to Labiobaetis pulchellus (Müller-Liebenau & Hubbard, 1985) (= L. soldani Kubendran et al. 2014, syn. n.) is established based on examination of imagines reared from larvae in India ...and Sri Lanka. This species belongs to the tricolor group, which comprises Holarctic species L. tricolor (Tshernova, 1928), L. propinquus (Walsh, 1863), L. calcaratus (Keffermüller, 1972), and some Oriental species.
A new species, Cheleocloeon vaigaiensis sp. n., is described from Southern India based on larvae, imagines and subimagines of both sexes associated by rearing. This new Oriental species is most ...closely related to the Afrotropical species Cheleocloeon clavifolium Kluge 2016. Formerly, the genus Cheleocloeon Wuillot & Gillies 1993 was known only from Africa, Madagascar and Arabia; this is the first report of this genus from the Oriental Region.
According to the classification proposed in the previous publication by Kluge, the genus Teloganodes Eaton 1882 is divided into three subgenera distinguished only by tergalii number: the subgenus ...Teloganodes (with 5 pairs of tergalii on uromeres II-VI), the subgenus Dudgeodes Sartori in Sartori et al. 2008 (with 4 pairs of tergalii on uromeres II-V) and the subgenus Derlethina Sartori in Sartori et al. 2008 (with 3 pairs of tergalii on uromeres II-IV). All three subgenera are represented in Southern India. Based on the new material, additional descriptions are given to the following species: T. (Teloganodes) kodai Sartori in Sartori et al. 2008 (= Teloganodes barathyae Sivaruban et al. in Martynov et al. 2022, syn. n.); Teloganodes (Teloganodes) dentatus Navás 1932 (= T. sartorii Selvakumar et al. in Selvakumar et al. 2014, syn. n.); Teloganodes (Dudgeodes) palnius (Selvakumar et al. in Selvakumar et al. 2014) (= Dudgeodes bharathidasani Anbalagan et al. 2015, syn. n.; = Dudgeodes sartorii Srinivasan et al. 2021, syn. n.; = Dudgeodes molinerii Sivaruban et al. in Martynov et al. 2022, syn. n.); Teloganodes (Derlethina) tamiraparaniae (Selvakumar et al. in Selvakumar et al. 2014). A new species T. (Teloganodes) velutinus sp. n. is described from the Western Ghats based on larvae, female imagines reared from larvae and eggs.
Three new species of Caenis Stephens viz., Caenis kaegies sp. n., C. venkataramani sp. n., and C. arunachalami sp. n., are described based on larvae and reared subimagines and/or imagines from ...Madurai, Tamil Nadu. Two more species of Caenis are recognized and described (from eggs and imagoes) but are not formally named. Additional characters are mentioned for C. americani Srinivasan, Sivaruban, Barathy, Malzacher & Isack, 2021 and C. maduraiensis Balasubramanian & Muthukatturaja, 2021. The egg morphology of all the known species of Caenis from Tamil Nadu is described. The total number of Caenis species is thereby increased to seven in the Madurai District and nine in South India. The genus Clypeocaenis Soldan is recorded for the first time in the Madurai District, with the species Clypeocaenis kaveri Balasubramanian and Muthukatturaja, 2021, whose description is amended. Identification keys to the adults, larvae, and eggs of the known Caenis species from South India are also provided.
Caenis americani sp. nov. is described based on larvae and female imagoes from the Mangalamkombu stream of Southern India. Caenis americani is most likely a parthenogenetic species, in the light of ...the fact that only females have been collected. The larva can be distinguished from other species of Caenis by the i) shape of the sternum IX and its shagreen field, ii) shape and denticulation of hind claws and iii) lateral lobes of mesonotum distinctly bulged. The phylogenetic relationships of the new species remain unknown, as molecular records of Caenis throughout the Oriental region are largely unknown, and the taxonomically important males are absent.
Caenis limai sp. n. is described from the Veerapandi River in Theni, South India based on the larva, adult, and egg stages. The total number of Caenis species in India thereby is being augmented to ...eleven. The most closely related species to Caenis limai sp. n. is Caenis ulmeriana Malzacher,
2015
and the comparisons between both species are discussed herewith. The most important male subimaginal characters of Caenis americani Srinivasan et al., 2021 is described for the first time.
http://www.zoobank.org/urn:lsid:zoobank.org:pub:8D25BB94-4B03-4360-9F67-E1CB58F2F982
A new species Acentrella (A.) isacki sp. n. is described based on the larvae collected from the Neeru stream of Jammu and Kashmir, India. It is the first record of the nominotypical subgenus ...Acentrella Bengtsson,
1912
from India. The new species does not belong to any Palearctic subgenus group proposed by Kluge and Novikova (
2011
). It is distinguished from closely related Acentrella (A.) lata (Müller-Liebenau,
1985
) by the apico-internal projection on the labial palp segment II, sub-marginal arc of setae in labrum, and by the presence of spines on the inner margin of paraproct.
http://www.zoobank.org/urn:lsid:zoobank.org:pub:992D271C-3327-4706-8625-7662CA4E2EF4
Thraulus jacobusi sp. n. is described based on the nymphs collected from the Veerapandi River in the south of the Western Ghats. Thraulus jacobusi sp. n. may be distinguished from other oriental ...species of Thraulus Eaton,
1881
by the following combination of characters in the nymphs: labial palp ratio, maxillary palp ratio of segments II and III, the colouration of legs, shape and denticulation of claws, shape of tergalius I, and posterolateral spines on the tergum VIII and IX. Nymphal diagnostic keys to Indian species of Thraulus are provided.
http://www.zoobank.org/urn:lsid:zoobank.org:pub:69019BD1-BE64-4186-8DA9-C67D28DD6135
