taxonID	type	description	language	source
703487DEFF89FFA5FFE7F994FBD419E5.taxon	materials_examined	Material examined. One male mature larva (AMC / ZN / 279) and two female larvae (AMC / ZN / 280), India, Tamil Nadu, Theni district, Anai Pillayar Kovil Dam, 10 ° 03 ′ 07 ″ N, 77 ° 34 ′ 02 ″ E; 336 m. a. s. l., 23 - XII- 2020, leg. P. Srinivasan & R. Isack.	en	Srinivasan, Pandiarajan, Sivaruban, Thambiratnam, Barathy, Sivaruban, Isack, Rajasekaran (2024): New findings of the Caenis ulmeriana-group (Ephemeroptera: Caenidae) in the Western Ghats, India. Journal of Insect Biodiversity and Systematics 10 (3): 443-451, DOI: 10.61186/jibs.10.3.443, URL: https://doi.org/10.61186/jibs.10.3.443
703487DEFF89FFA5FFE7F994FBD419E5.taxon	distribution	Distribution. The species is reported from India (new record), Java (Malzacher, 2015), Sumatra (Malzacher, 2015), Thailand (Malzacher, 2015; Malzacher & Sangpradub, 2021), Myanmar (Malzacher, 2023) and Philippines (Malzacher, 2023) (Fig. 28). Diagnostic characters. Caenis ulmeriana can be distinguished from all other Caenis species by the following combination of characters: Imago (Imaginal characters extracted from the male last instar larva): base of antennal flagellum not dilated (Fig. 2); prosternal triangle forming cone-shaped structure (Fig. 3); foretarsus segments 2 – 4 each with a lateral and median projections (Fig. 4); penis broad and rounded, ventral fold forming a semicircular or semielliptical process (Fig. 5); forcipes moderate, straight, sides apically converging with a rigid elongated spine or a moderate spine equipped with an apical tuft of long spines (Fig. 6). Larva. Genae slightly bulged; pronotum and mesonotum denticulate without any nose-shaped projection (Fig. 13); maxillary palp segment III clearly longer than segment II (Fig. 10); ratio of labial palp segments 2 and 3 greater than 2 (Fig. 12); forefemur with a transverse row of 8 – 10 conspicuous spatulate setae (Fig. 15); foreclaw slender with 2 – 3 small basal denticles (Fig. 17); midclaw bowed with 3 – 5 small basal denticles (Fig. 19); hindclaw strongly bent with 2 – 3 basal denticles, and a dense row of microdenticles (Fig. 22); dorsal surface of tergalius II with numerous scales and 2 – 5 spatulate setae on the apical 2 / 3 rd of Y-shaped ridge (Fig. 23); hind margin of tergum VII and VIII with long, simple setae, and hind margin of tergum IX and X with small denticles (Fig. 26).	en	Srinivasan, Pandiarajan, Sivaruban, Thambiratnam, Barathy, Sivaruban, Isack, Rajasekaran (2024): New findings of the Caenis ulmeriana-group (Ephemeroptera: Caenidae) in the Western Ghats, India. Journal of Insect Biodiversity and Systematics 10 (3): 443-451, DOI: 10.61186/jibs.10.3.443, URL: https://doi.org/10.61186/jibs.10.3.443
703487DEFF89FFA5FFE7F994FBD419E5.taxon	biology_ecology	Ecology. The larvae of Caenis ulmeriana were collected in Anaipillayar dam of the southern Western Ghats (3 – 5 m wide, 0.5 – 1 cm depth). The water temperature ranges between 24 – 26 ° C; pH 7 – 7.2. Substratum is mainly made of rock, cobbles, gravel and leaf litter (Fig. 27).	en	Srinivasan, Pandiarajan, Sivaruban, Thambiratnam, Barathy, Sivaruban, Isack, Rajasekaran (2024): New findings of the Caenis ulmeriana-group (Ephemeroptera: Caenidae) in the Western Ghats, India. Journal of Insect Biodiversity and Systematics 10 (3): 443-451, DOI: 10.61186/jibs.10.3.443, URL: https://doi.org/10.61186/jibs.10.3.443
