Patrus ritsemai ( Régimbart, 1882b ), Gupta & Sonali & Wani & Ghosh & Ghosh & Ghosh, 2025

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 : 1323

Patrus ritsemai ( Régimbart, 1882b) comb. n.

( Figures 12 (d), 18(b))

Orectochilus ritsemae Régimbart, 1882b, p. 67 ; Régimbart 1884: 431, pl. 12, fig. 136. Orectochilus ritsemai : Peschet 1923: 13; Ochs 1929b: 243; Vazirani 1958: 17.

Orectochilus (Patrus) ritsemai : Ochs 1930: 33; Vazirani 1977a: 252, 1977b: 280, 1984: 88, figs. 26C, 40C, 48D; Mukhopadhyay and Ghosh 2015: 464.

Type locality

Java ( Régimbart 1882b).

Material examined

INDIA: Jharkhand: Pashchimi Singhbhum, Chakradharpur , 22.67662°N, 85.625503°E, 1 ex ., 1 December 1927, leg . H .S . Pruthi [999/H4]; Ranchi, Horhap , 23.33097°N, 85.467085°E, 1 ex ., 5 February 1954, leg . A .P . Kapur [11529/H4]; Godda, Manoharpur , 24.92643°N, 87.327654°E, 1 ex ., 26 February 1954, leg . A .P. Kapur [11530/H4]. Uttar Pradesh: Shahjahanpur, Sandia , 28.22642°N, 80.007377°E, 6 exs ., 1 December 1927, leg . H .S. Pruthi [1011/H4]. West Bengal: Darjeeling, Kalimpong , 27.05977°N, 88.471383°E, 1 ex ., 1 November 1927, leg . H .S. Pruthi [1017/H4].

Distribution in India ( Figure 18 (b))

Assam (Kairkhana), Bihar, Jharkhand (Santal Parganas, Ranchi, Pashchimi Singhbhum), Madhya Pradesh (Annupur: Koilari, Ratlam, Rewa, Mandla, Narmadapuram ‘Hoshangabad’: Sandia), Maharashtra (Aurangabad, Nanded), Odisha (Balasore), Uttar Pradesh (Mirzapur, Shahjahanpur), and West Bengal (Darjeeling: Kalimpong).

Global distribution

Myanmar, India, Indonesia, and Vietnam.

Remarks

This is the first record of this species from West Bengal.

Figures

Figure 12. Habitus (in dorsal view): (a) Patrus oblongiusculus oblongiusculus (Régimbart); (b) P. productus (Régimbart); (c) P. punctulatus (Régimbart); (d) P. ritsemai (Régimbart); (e) P. semivestitus (Guérin-Méneville).

Figure 18. Map of India showing the distribution of Indian species of Gyrinidae. (a) P. neglectus, P. cribratellus cribratellus, P. cribratellus metallescens; (b) P. similis, P. ritsemai; (c) P. limbatus; (d) P. ribeiroi, P. marginipennis angustilimbus, P. marginipennis marginipennis, P. nathani, P. metallicus, P. uttarpradeshensis.