Choroterpes (Euthraulus) latus Kluge, Srinivasan, Vasanth, Sivaruban, Barathy & Isak, 2022

Vasanth, M., Subramanian, K. A. & Kubendran, T., 2024, A new record of Choroterpes (Euthraulus) latus Kluge et al., 2022 (Ephemeroptera: Leptophlebiidae) from the state of Jharkhand, India, Records of the Zoological Survey of India 124 (2), pp. 145-148 : 146-147

Choroterpes (Euthraulus) latus Kluge, Srinivasan, Vasanth, Sivaruban, Barathy & Isak, 2022 (E.) latus Kluge, Srinivasan, Vasanth, Sivaruban, Barathy & Isak, 2022

Material examined: 8 larvae, India, Jharkhand, Surguja District, Aurajhariya waterfall, 23.65641 N, 83.64483 E, Alt. 471 m . 25.x.2021, Coll. Ravi K. Kushwaha & party.

Mature larva ( Figures 1-3 ). Length: body 4.8-5.2 mm; antennae 2.0- 2.2 mm; cerci 7.0- 7.5 mm; terminal filament,

6.0- 6.5 mm.

Distribution: India (southern Western Ghats, Jharkhand shown in Figure 4 ) and Sri Lanka.

Diagnosis: Ch. (E.) latus Kluge et al. 2022 can be distinguished from all other known species by the

Vasanth et al., following combination of characters: 1. Abdominal terga broadened and shortened of anterior part; 2. Emargination of labrum shallowly cleft with 5 blunt denticles medially; 3. Hypodermal colouration of abdominal terga; 4. maxillae with 10 comb-like setae, inner margin of palp segment II with 4 setae and single setae on segment III; 5. Labium broad, segment III of palp dorsally with 5 long setae and apically triangular with small stout setae; 6. Claw of all legs apically hooked with a row of 14 sharp denticles.

Ecology: The study locality is the Aurajhariya waterfall in Surguja district. The stream bed is primarily composed of 15% gravel, 40% cobbles, 30% boulders, 5% bedrock, 5% fine sand, and 5% silt. The Aurajhariya waterfall measures 4-4.5 m in width and has a depth of 30-35 cm, with a medium to high water current of 2.0 m/sec.Environmental conditions include an atmospheric temperature of 18- 22°C, water temperature of 19-25°C, humidity at 55%, and a pH of 6.8. Larvae were collected from the small stones at the stream’s bottom. The larvae were found under stones alongside Cloeon sp. , Baetis sp. , Afronurus sp. , Plecoptera (stoneflies), and Hydropsychidae ( Trichoptera ).

Figures

Figure 4. Distribution map of Ch. (E.) latus in India

Figures 1-3. Larva of Ch. (E.) latus 1. Dorsal view; 2. Ventral view; 3. Lateral view.