Two new species of Clypeocaenis (Ephemeroptera: Caenidae) from Western Ghats, Southern India

Abstract

Two new species of Clypeocaenis (Ephemeroptera: Caenidae) are described from Gayathripuzha River, Kerala, and Tunga River, Karnataka, Southern India. The species are best distinguished from congeners based on leg and gill characteristics, as follows. Clypeocaenis gayathri sp. nov.: (1) fore tibia with two rows of ventral and lateral filtering setae, femur with bifid spines, middle tibia with trifurcated spines apically; (2) tracheated gill covers with spines and bifurcated ridges on margins, gills III–VI with more numerous fringed bifid fimbriae. Clypeocaenis sharadhae sp. nov.: (1) fore tibia with two rows of long filtering setae on lateral margin and one row on ventral margin arranged vertically, fore tarsus with transverse row of long setae, hind tibia with a row of lanceolate setae on lateral margin; (2) gills III–VI approximately triangular shaped, with fringed bifid fimbriae, gill III with 12 bifurcated and 2 trifurcated fimbriae.

New findings of the Caenis ulmeriana-group (Ephemeroptera: Caenidae) in the Western Ghats, India

“…However, Indian Caenidae has ineffectively been investigated compared to other parts of the Oriental region with only two genera. So far, five species of Clypeocaenis Soldán, 1978 (Muthukatturaja et al, 2020;Srinivasan et al, 2022) and seven species of Caenis (Malzacher, 2015;Srinivasan et al, 2021Srinivasan et al, , 2023aSrinivasan et al, , 2023b have been discovered in the last decade. However, the number of undiscovered species in Caenidae is probably high compared to the discoveries that were made.…”

Genetic diversity and phylogenetic analysis of mayfly Caenis (Insecta: Ephemeroptera) using Cytochrome C Oxidase I (COI) and 12s rRNA genes from Thailand

“…Kang and Yang (1994) reported the nymphal stages of seven new species of Caenidae in Taiwan. Since 2013, thirty-tree new Caenis species have been described from Thailand, Indonesia, India and Vietnam (Malzacher 2013;Malzacher 2015;Malzacher and Sangpradub 2017;Muthukatturaja and Balasubramanian 2020;Malzacher 2021;Malzacher and Sangpradub 2021;Muthukatturaja and Balasubramanian 2021;Srinivasan et al 2021).…”