Patrus discifer ( Walker, 1859 )

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 : 1310-1311

Patrus discifer ( Walker, 1859)

( Figures 10 (d), 17(a))

Gyrinus discifer Walker, 1859, p. 51 . Gyretes discifer : Motschulskey 1861: 109; Redtenbacher 1868: 124, pl. 1, fig. 11.

Orectochilus discifer : Régimbart 1884: 416; Régimbart 1886: 262; Regimbart 1893: 62; Régimbart 1902: 470; Régimbart 1903: 334; Zimmermann 1917: 168; Ochs 1927b: 243; Ochs 1929b: 245; Ochs 1966b: 181; Vazirani 1958: 17.

Orectochilus (Patrus) discifer : Ochs 1930: 24; Vazirani 1977b: 280, 1984: 60, figs. 23C, 37F, 46G; Biswas et al. 1995: 130; Mukhopadhyay and Ghosh 2007: 444; Jaiswal 2012: 39; Jaiswal et al. 2013 a: 24, 2014: 90.

Patrus discifer : Miller and Bergsten 2012: 706–746.

Type locality

Ceylon ( Walker 1859).

Material examined

INDIA: Jharkhand: Ranchi, 23.3441°N, 85.309562°E, 4 exs ., 14 April 1948, leg. B.N. and T.B. S. [4777–4780/H4A]. Madhya Pradesh: Anuppur, Amarkantak, 22.68223°N, 81.753222°E, 9 exs ., 1 January 1927, leg . H .S. Pruthi [874–883/H4]; Hoshangabad, Satpura, 22.57053°N, 78.143774°E, 3 exs., 1 January 1929, leg . F .H. Gravely [1015/H4]. Maharashtra: Mumbai City, Colaba, 18.90676°N, 72.814689°E, 7 exs ., 28 October 1965, leg. T.G. Vazirani [4816– 4823/H4A] . Tamil Nadu: Tiruchirappalli, Semmalai R .F., 10.5715°N, 78.269118°E, 7 exs., 5 October 1926, leg . H .S. Pruthi [980/H4]; Dindigul, Sirumalai, 10.19424°N, 77.996704°E, 1 ex., 12 January 2019, leg . Sewtapadma Das [25990/H4A] .

Distribution in India ( Figure 17 (a))

Andhra Pradesh, Bihar, Chhattisgarh, Jharkhand (Parasnath, Ranchi), Kerala (Travancore, Kochi ‘Cochin’, South Malabar , Wallardie, Silent Valley National Park, Dhoni Hills), Madhya Pradesh (Amarkantak, Hoshangabad: Satpura Hills, Pachmarhi; Umaria, Rewa: Jaithari Range; Annupur), Maharashtra (Pune, Khandala, Ratnagiri, Mumbai), Tamil Nadu (Chennai ‘Madras’; Nilgiri Hills, Kodaikanal, Nilambur; Annamalai Hills: Cinchona, Tiruchirappalli, Dindigul), Telangana (Hyderabad: Durgam Cheruvu, Ameenpur Lake), and West Bengal (‘Calcutta’ Kolkata) .

Figures

Figure 10. Habitus (in dorsal view): (a) P. cribratellus cribratellus (Régimbart); (b) Patrus cuneatus (Régimbart); (c) P. desgodinsi desgodinsi (Régimbart); (d) Patrus discifer (Walker); (e) P. fletcheri (Ochs); (f) P. gangeticus (Wiedemann).

Figure 17. Map of India showing the distribution of Indian species of Gyrinidae: (a) P. discifer; (b) P. gangeticus, P. dilatatus; (c) P. figuratus, P. fletcheri; (d) P. haemorrhous haemorrhous.