Srinivasan Pandiarajan

The American College, Madurai · Department of Zoology

The health of an ecosystem can be studied by measuring the biodiversity of ephemeroptera, plecoptera and trichoptera complexes. The studies were done in Karanthamalai stream from August 2017 to January 2018. A total of 220 Specimens belonging to 16 genera, 11 families and 3 orders were collected during the study period. Hydropsychidae was the most...

The Vaigai River was highly polluted by various chemicals and heavy metals due to industrial and domestic discharge. These pollutants cause serious damage to the fishes. In the fishes these pollutants gets accumulated in their liver, bone, muscles and kidney. The heavy metal toxicity of the river were analyzed by collecting the fish from various si...

Caenis ulmeriana Malzacher, 2015 is recorded for the first time from the Western Ghats, India. Prior records of this species encompass Java, Sumatra, Thailand, Myanmar, and the Philippines. Notably, the Indian population of C. ulmeriana showcases variability, including slight changes in the shape of forceps in the male subimago and increased dentic...

Baetiella muchei (Braasch, 1978) is recorded for the first time from the Neeru stream of Jammu and Kashmir, India. The variability in larval characters such as size, the shape of the labrum, and the number of the sub-marginal arc of setae in the labrum differs from 12 to 22, degree of fusion of the mandibular incisors, spines on the distal margin o...

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: Nigrobaeti...

A new species Alainites neeru sp. nov. is described based on larvae collected from a hill stream in Jammu and Kashmir, India. It is the first report of the genus Alainites Waltz & McCafferty, 1994 from India. The new species is closely related to the Palearctic species A. muticus (Linnaeus, 1758), but can be distinguished from the latter by the len...

In this contribution, we report a gynandromorph mayfly for the first time from India. The gynandromorph traits were visible in the subimaginal stage of the species Centroptella ghatensis Kluge, 2021 collected in the southern Western Ghats, Tamil Nadu. It is the second record of a gynandromorph mayfly from the family Baetidae in the Oriental Region.

As part of the ongoing research in the southern Western Ghats, a new species of Baetis Leach is described based on the nymphs collected in the Tamil Nadu, Southern India. Baetis venkataramani sp. nov. does not belong to any of the Baetis species groups proposed so far. The most closely related species to B. venkataramani sp. nov. is B. collinus Mül...

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...

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. n., Baetis (Tenuibaetis) fujitanii (Kaltenbach & Gattolliat 2019) comb. n., Baetis...

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 Malzacher, P. (2015), ‘Revision of the Oriental Spec...

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 me...

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),...

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...

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 distinguis...

The study describes the diversity and community structure of Ephemeroptera, Plecoptera and Trichoptera (EPT) taxa present in the Puliyancholai stream of the Kolli hills, Eastern Ghats. During the six months of study 397 specimens from 11 genera under seven families were collected. Ephemeroptera was the most dominant species followed by Trichoptera...

Tricorythus meenakshi sp. n., is described based on all the stages from Tamil Nadu, Southern India. This new Indian species is most closely related to the Afrotropical species T. discolor Burmeister and T. tener Kluge. The new species can be separated from others in the genus by: In male imago, i) body dorsally with a colorless median stripe from h...

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...

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. Based on male and female imagines reared from larvae, the following species are described or re-described: Choroterpes (Euthraulus) alagarensis Dinakar...

Two new species of Dudgeodes Sartori, 2008 and a new species of Teloganodes Eaton, 1882 are described from India; they are Dudgeodes selvakumari Martynov & Palatov, sp. nov. from Himalayan region (Uttarakhand), Dudgeodes molinerii Sivaruban, Martynov, Srinivasan, Barathy & Isack, sp. nov. , and Teloganodes barathyae Sivaruban, Martynov, Srinivasan...

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 Eaton, A.E. (1881), ‘An Announcement of New Genera of the Ephemeridae’, Entomologist’s Monthly Magazine, 17, 191–197. [Goog...

A new species of Labiobaetis Novikova and Kluge, 1987 Novikova, E.A., and Kluge, N.J. (1987), ‘Systematics of the Genus Baetis (Ephemeroptera, Baetidae), with Descriptions of New Species from Middle Asia’, Vestnik Zoologii, 4, 8–19. [Google Scholar] is described based on the larval material from Tamil Nadu, southern India. The total number of Labio...

Megaglena sivarubani sp. nov. is described based on the nymphs from the Puliyuthu falls of Tamil Nadu, Southern India. The number of species of Megaglena Peters & Edmunds is now expanded to three and it is the first record of the genus from the Tamil Nadu part of Southern Western Ghats. Megaglena sivarubani sp. nov. can be distinguished from Indian...

The present study was carried out in 27 streams of the southern part of the Western Ghats and the Eastern Ghats from January to December 2018. The outcomes show that there is an increase in the percentage of Ephemeroptera (71%) in the first order and there was a negligible fall in the abundance of the fourth-ordered stream. LSE results show a gradu...

Clypeocaenis malzacheri sp. nov. is described from the Kottakudi River in southern India, based on larvae and eggs. Clypeocaenis malzacheri sp. nov. appears to be closely related to C. bisetosa Soldán. The new species is distinguished from this species and other congeners based on the structure of the frons; the structure, setation, and maculation...

Nigrobaetis klugei sp. nov. is described based on nymphs from the Sastha falls of Western Ghats, Southern India. The nymph of Nigrobaetis klugei sp. nov. can be distinguished from other Oriental species of Nigrobaetis by the following combination of characters: (i) dorsal surface of the labrum with 1+3 long simple stout setae on the distal half; (i...

In the study on the diversity and community structure of Ephemeroptera in the freshwater stream of Chinnasuruli falls on Megamalai hills, a total of 523 specimens belonging to thirteen genera and five families were collected in six month periods. Of the five families, Teloganodidae and Leptophlebiidae exhibited high diversity and Caenidae showed lo...

Sparsorythus srokai sp. nov. is described from the Veerapandi River, Theni district, Tamil Nadu, India based on nymphs of both sexes. The nymphs of Sparsorythus srokai sp. nov. can be distinguished by the following combination of characters: i) presence of lateral setae in each segment of caudal filaments, ii) dorsal surface of labrum entirely cove...

The present work was carried out from October 2017 - February 2018 to contemplate the diversity and distribution of caddis fly larvae in Manikyan kada, Ayyanar, and Siruaruvi streams of Eastern Ghats. Canonical correspondence analysis was used to find the relationship between ecological attributes and caddis fly larvae. A total of 749 individuals b...

Dudgeodes sartorii sp. nov. is described based on nymphs from the Megamalai hills of Western Ghats, Southern India. The nymph of Dudgeodes sartorii sp. nov. can be distinguished from other Indian species of Dudgeodes by i) prothorax with two rounded tubercles; (ii) outer margin of mesothorax with simple setae; (iii) distinct maculae in the distal r...

Caenis nigropuctatula Malzacher, 2015, a new mayfly record of the fauna of Indian Ephemeroptera, is recorded from the Vaigai River, Tamil Nadu, India. It is known before from Thailand, Java, and Sumatra. The distribution map of C. nigropuctatula is given.

A key to ephemeropteran nymphs belonging to 8 families, 30 genera and 48 species from the Palni and Cardamom hills of the Western Ghats in Kerala and Tamil Nadu states is presented in this chapter. Sampling was done at 30 sites. Baetidae and Leptophlebiidae diversity was higher compared to Ephemeridae and Ephemerellidae. Mayflies endemic to the Pal...

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 sh...

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. Sparsorythus sivaramakrishnani sp. nov. differs from the closely related S. gracilis by the shape of the left prostheca, the number of bristle-like processes a...

The main objective of this study was to evaluate the community structure of the order Ephemeroptera in the Southern Western Ghats ecoregion along with Principal Component Analysis (PCA) and Canonical Correspondence Analysis (CCA) from 2017 to 2018. Ecological parameters estimated at each collecting site were pH, dissolved oxygen, biological oxygen...

We inspected functional feeding groups in relationship with seasonality, stream order, Land Scape Elements (LSE), and mesohabitat of Ephemeroptera, Plecoptera, and Trichoptera (EPT) based on gut content analysis and mouthparts in 27 streams of the Western Ghats and the Eastern Ghats. From the study, a total of 14,168 specimens were collected and id...

Investigation on the diversity, ecology and trophic categorization of Ephemeroptera, Plecoptera and Trichoptera complex (EPT) was carried out in Kiliyur falls of the Eastern Ghats. An aggregate of 2,189 specimens belonging to 24 genera, 12 families and 3 orders were collected. Ephemeroptera was found to be high when compared to Plecoptera and Trich...

Order odonata includes important aquatic insect groups such as dragonflies and damselflies. They help to assess the ecosystem health and serves as pollution indicators. Studies of Odonata were conducted in Alagar hills of South India state of Tamilnadu from August 2018 to January 2019. Odonate species abundance was high in October to November (7 to...

The present work implies about the role of microorganisms and macro invertebrates in leaf litter degradation. Five fungal genera and five bacterial genera were isolated from the collected leaf litter samples. Bacillus sp and Aspergillus niger were as the dominant in bacterial and fungal genera respectively. The leaf litter was associated with the s...

In the study of diversity and distribution of Ephemeroptera in Gadana River and relationship between Ephemeropteran community and ecological factors, revealed a total of 2056 specimens belonging to 25 genera and 7 families. The diversity and distribution of Ephemeroptera were higher during the rainy season, contrasted with non-rainy period. The hig...

Mayflies are recognized as potential bioindicators of good water quality and they are not widely been studied in Indian sub-continent. So the current paper aims to describe the distribution and trophic categorization of mayflies in connection with stream order, mesohabitats and landscape elements. The study was carried out in 30 streams of Palni an...

This work incorporates two methods that macroinvertebrate bio-monitoring and DNA barcoding, in an effort to gain a greater understanding of how traditional taxonomic approaches and DNA barcoding, helps in interpretation of water quality and phylogenetic lineage of insects. The present work is carried out to find the effect of the phenomenon in the...