Abstract
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 of legs; the shape and orientation of the abdominal tergum II projection; and by the shape and denticulation of abdominal sternum IX. Updated couplets for an identification key to Clypeocaenis larvae in the Indomalayan region are provided. The total number of Clypeocaenis species is thereby increased to twelve in the world and seven in India.
References
Balasubramanian, C. & Muthukatturaja, M. (2021) Two additional new species of Clypeocaenis Soldán, 1978 (Ephemeroptera: Caenidae) from the Western Ghats of Peninsular India, Zootaxa, 4915 (3), 377–388. https://doi.org/10.11646/zootaxa.4915.3.6
Jacobus, L.M. & McCafferty, W.P. (2009) Two objective synonyms of Afrotropical mayfly genera (Ephemeroptera: Baetidae, Caenidae). Proceedings of the Entomological Society of Washington, 111, 757. https://doi.org/10.4289/0013-8797-111.3.757
Kluge, N.J. (2004) The phylogenetic system of Ephemeroptera. Springer, Dordrecht, 456 pp. https://doi.org/10.1007/978-94-007-0872-3
Malzacher, P. (2009) New larvae of Caeninae from Madagascar (Ephemeroptera: Caenidae). Stuttgarter Beiträge zur Naturkunde A, Neue Serie, 2, 177–194.
Malzacher, P. (2013) Caenidae from East Kalimantan, Borneo (Insecta: Ephemeroptera) with a discussion on phylogeny of the new tribe Clypeocaenini, subfamily Caeninae. Stuttgarter Beiträge zur Naturkunde A, Neue Serie, 6, 21–55.
Malzacher, P. (2014) A new genus of the tribe Clypeocaenini (Ephemeroptera: Caenidae: Caeninae). Stuttgarter Beiträge zur Naturkunde A, Neue Serie, 7, 1–7.
Malzacher, P. & Staniczek, A.H. (2016) Two new genera of Caeninae (Ephemeroptera: Caenidae), with a cladistic analysis of the tribe Clypeocaenini. Stuttgarter Beiträge zur Naturkunde A, Neue Serie, 9, 41–62. https://doi.org/10.18476/sbna.v9.a4
Malzacher, P. (2021) Mekongellina, a new mayfly genus of the subfamily Brachycercinae (Ephemeroptera: Caenidae) from Thailand. Integrative Systematics, 2 (2019), 1–9. https://doi.org/10.18476/insy.v02.a1
Malzacher, P. & Sangpradub, N. (2021) New mayfly species of Caenis and Kalimaenis from Thailand and descriptions of two new genera of the subfamily Caeninae (Ephemeroptera: Caenidae). Integrative Systematics: Stuttgart Contributions to Natural History, 3 (1), 1–33. [2020] https://doi.org/10.18476/insy.v03.a1
Muthukatturaja, M., Balasubramanian, C. & Murugan, A. (2020) Two new species of Clypeocaenis (Ephemeroptera: Caenidae) from Western Ghats, Southern India. Zootaxa, 4722 (4), 361–370. https://doi.org/10.11646/zootaxa.4722.4.5
Ozdikmen, H. (2008) Replacement names for three preoccupied mayflies genus group names (Ephemeroptera). Munis Entomology and Zoology, 3, 651–653.
Provonsha, A.V. & McCafferty, W.P. (1985) Amercaenis: new Nearctic genus of Caenidae (Ephemeroptera). International Quarterly of Entomology, 1 (1), 1–7.
Provonsha, A.V. & McCafferty, W.P. (1995) New brushlegged caenid mayfly from South Africa (Ephemeroptera: Caenidae). Aquatic Insects, 17 (4), 241–251. https://doi.org/10.1080/01650429509361593
Soldán, T. (1978) New genera and species of Caenidae (Ephemeroptera) from Iran, India and Australia. Acta Entomologica Bohemoslovaca, 75, 119–129.
Soldán, T. (1983) Two new species of Clypeocaenis (Ephemeroptera: Caenidae) with a description of adult stage and biology of the genus. Acta Entomologica Bohemoslovaca, 80 (3), 195–206.
Soldán, T. & Landa, V. (1991) Two new species of Caenidae (Ephemeroptera) from Sri Lanka. In: Alba-Tercedor, J. & Sanchez-Ortega, A. (Eds.), Overview and Strategies of Ephemeroptera and Plecoptera. Sandhill Crane Press, Gainesville, Florida, pp. 235–246.
Srinivasan, P., Sivaruban, T., Barathy, S., Malzacher, P. & Isack R. (2021) A new charismatic Caenis Stephens, 1835 (Ephemeroptera: Caenidae) from Southern India. Zootaxa, 4926 (1), 105–116. https://doi.org/10.11646/zootaxa.4926.1.7
Sun, L. & McCafferty, W.P. (2004) New name for a generic homonym in Caenidae (Ephemeroptera). Proceedings of the Entomological Society of Washington, 106, 936.