Gyrinus (Gyrinus) convexiusculus (Macleay)

Gupta, Devanshu, Sonali, Shipra, Wani, Irtiza, Ghosh, Priyanka, Ghosh, Asim Kumar & Ghosh, Sujit Kumar, 2025, A comprehensive taxonomic review of Indian Gyrinidae (Coleoptera): new combinations, geographic distribution, and annotated species checklist, Journal of Natural History 59 (17 - 20), pp. 1267-1338 : 1296-1297

Gyrinus (Gyrinus) convexiusculus (Macleay)

( Figures 7 (a), 15(a))

Gyrinus convexiusculus Macleay, 1871, p. 128 ; Régimbart 1883: 166, fig. 88; Fauvel 1883: 349; Régimbart 1886:257; Severin 1890:194; Régimbart 1907:171; Peschet 1923: 7; Ochs 1924: 229; Ochs 1927a: 115, 121; Ochs 1928: 42; Ochs 1929b: 241; Ochs 1930: 6; Vazirani 1958: 251, 291; Mukherjee 1966: 65; Vazirani 1984: 30; Mazzoldi 1995: 157; Mukhopadhyay et al. 2000: 81; Mukhopadhyay and Ghosh 2007: 443; Jaiswal 2012: 39; Sharma and Bano 2012: 500; Jaiswal et al. 2013: 24; Jaiswal et al. 2014: 90; Liang et al. 2021: 15 ; Hájek and Fery 2022: 4; Chandra et al. 2021: 231; Shankar et al. 2023: 456, fig. 27; Takawane et al. 2024: 483, fig. 2c, d.

Gyrinus huttoni Pascoe, 1877: 141 ; Broun 1880: 76; Régimbart 1886: 257.

Gyrinus simoni Régimbart, 1883: 163 .

Type locality

Gayndah, Australia ( MacLeay 1871).

Material examined

INDIA: Jharkhand: Ranchi , 23.3441°N, 85.309562°E, 6 exs ., 5 February 1954, leg . A .P . Kapur [4737–4742/H4A] . Karnataka: Bhadra Wildlife Sanctuary, Lalbugh, Kathri , 13.753191°N, 75.610688°E, 22 exs ., 2 March 2009, leg . Md . Jafer Palot [30500/H4A] . Kerala: Waynad, Kalindi River, Thirunelly , 11.902387°N, 75.997751°E, 1 ex ., 23 March 1994, leg . K .C . Gopi [30501/H4A] . Madhya Pradesh: Anuppur, Amarkantak , 22.68223°N, 81.753222°E, 10 exs ., 1 November 1927, leg . H .S . Pruthi [991–992/H4]; Bhopal, Raipur , 23.4299°N, 77.414972°E, 6 exs ., 18 December 1939 [4786–4790/H4A; 4842/H4A].

Distribution in India ( Figure 15 (a))

Andhra Pradesh (Palkonda Hills; Koundinya Wildlife Sanctuary: Pedduru, Kalyani Revu Waterfall, Keermanda), Assam (Kaziranga: Mikir Hills), Bihar (Chapra), Chhattisgarh (Amarkantak: Dhud Dhara Falls), Jharkhand (Ranchi, Manoharpur: Koinara Range), Karnataka (Bhadra Wildlife Sanctuary, Bengaluru, Mysore), Kerala (Silent Valley National Park), Madhya Pradesh (Anuppur, Bhopal, Shahdol, Umaria: Jaithari Range, Mandla, Rewa), Meghalaya (Shillong, Khasi Hills), Maharashtra (Pune, Satara), Odisha (Gunduria, Mayurbhanj), Tamil Nadu (Chennai ‘Madras’, Palni Hills, Nilgiri Hills: Coonoor River , Kodaikanal), and Telangana (Hyderabad: Durgam Cheruvu, Ameenpur Lake ) .

Global distribution

Australia, China, Japan, Sri Lanka, Tibet, Indonesia, India, Myanmar, Nepal, New Caledonia, New Zealand, and Vietnam.

Figures

Figure 7. Habitus (in dorsal view): (a) Gyrinus (Gyrinus) convexiusculus (Macleay); (b) G. (G.) distinctus Aubé; (c) G. smaragdinus Régimbart; (d) Metagyrinus arrowi (Régimbart); (e) Orectochilus castesi Régimbart; (f) O. murinus murinus Régimbart.

Figure 15. Map of India showing the distribution of Indian species of Gyrinidae: (a) Gyrinus convexiusculus, G. distinctus, G. smaragdinus; (b) Orectochilus assimilis, O. castesi, M. arrowi; (c) Patrus ahlwarthi, O. murinus murinus, O. murinus occidentalis, O. nuristanicus himalayensis, O. orbisonorum; (d) P. aenipennis, P. andamanarum, P. annandalei, P. brincki, P. cavernicola.