Peschetius quadricostatus ( Aube , 1838)

Sheth, Sayali D., Ghate, Hemant V., Dahanukar, Neelesh & Hajek, Jiri, 2021, Integrative taxonomic review of the genus Peschetius (Coleoptera, Dytiscidae, Hydroporinae) from India with description of two new species, Arthropod Systematics & amp; Phylogeny 79, pp. 535-553 : 535

3.3.3. Peschetius quadricostatus ( Aube, 1838)

Figs 5C , 6C , 8C

Hydroporus quadricostatus Aubé, 1838: 487 (original description; Bombay); Branden 1885: 61 (catalogue); Zimmermann 1920: 128 (catalogue); Régimbart 1899: 194 (description; new records).

Peschetius quadricostatus ( Aubé): Guignot 1935: 131 (notes); 1942: 21 (new combination); Balfour-Browne 1946: 103 (taxonomic notes); Vazirani 1967: 108 (faunistics); Tonapi and Ozarkar 1969: 314, 315 (illustration, description, biology); Vazirani 1970a: 115 (description); 1970b: 445 (faunistics); 1972: 295 (faunistics, taxonomic notes); 1977a: 48 (catalogue); 1977b: 44 (faunistics); 1977c: 126 (faunistics); Brancucci 1979: 198 (faunistics and discussion); Vazirani 1981: 261 (faunistics); Nilsson 2001: 181 (catalogue); Biström and Nilsson 2003: 140 (description); Ghosh and Nilsson 2012: 32 (catalogue); Nilsson and Hájek 2021: 127 (catalogue); Jaiswal et al. 2020: 116 (diagnosis).

Specimens examined.

Holotype: Not studied [not found in MNHN]. - Other material: INDIA - Maharashtra • 2 spec.; Jejuri ; 18°16′39″N, 74°9′22″E; ca 750 m. a.s.l.; 1 Feb. 2014; S. D. Sheth leg.; reservoir; ZSIP • 1 spec; Sindhudurg, Madkhol ; 15°56′49″N, 73°52′60″E; ca 50 m. a.s.l.; 27 May 2014; S. D. Sheth leg.; drying up river; ZSIP • 2 spec.; Raigad ; 18°9′2″N, 73°24′8″E; ca 50 m. a.s.l.; 18 Feb. 2015; S. D. Sheth leg.; streamlet; HVGC • 2 spec.; Sindhudurg, Pendur ; 16°4′9″N, 73°36′38″E; ca 10 m .a.s.l.; 4 May 2015; S. D. Sheth leg.; reservoir; UASB • 8 specs; Pune, Ane ; 19°09′47″N 74°14′4″E; ca 800 m a.s.l. ; 15 Sep. 2016; S. D. Sheth leg.; reservoir; HVGC • 2 spec., Igatpuri , 19°42.17′N, 73°33.06′E [19°42′11″N, 73°33′4″E]; 600 m. a.s.l.; 1 Aug.-12 Aug. 2002; P. Šípek and M. Fikáček leg.; NMPC • 2 spec.; Chiplun ; [17°31′56″N, 73°30′55″E]; [ca 10 m. a.s.l.]; 10 Jun. 2006; V. Ryjáček leg.; NMPC • 32 spec.; Western Ghats Mts., Amboli env., 50 km W Belgaum, Daudki ; [15°51′4″N, 74°29′52″E]; [ca 800 m. a.s.l.]; 21 May-23 May 2006; V. Ryjáček leg.; drying up river; NMPC . • 30 spec.; Western Ghats Mts. , 10 km E Sawantwadi; [15°54′20″N, 73°49′17″E]; [ca 100 m. a.s.l.]; 22 May 2006; O. Šafránek leg.; JSCL, NMPC • 25 spec.; ca. 15 km E Savantvadi ; 15°55′N 75°53′E [15°54′60″N, 73°52′60″E]; 40 m [ca 50 m. a.s.l.]; 22 May 2006; Z. Kejval leg.; riverside; NMPC. - Madhya Pradesh • 2 spec.; Panna NP; [24°43′8″N, 80°10′56″E]; [ca 400 m. a.s.l.]; 15 Aug. 1988; Werner leg.; HFCB • 1 spec.; ca. 130 km SE Bhopal, Pachmarhi env.; 22°28′N 78°26′E [22°27′60″N, 78°25′60″E]; ca. 1050 m .a.s.l.; 26 Jun.-29 Jun. 2006; Z. Kejval leg.; NMPC • 1 spec.; Hoshangabad Distr., ca. 5 km NE Hoshangabad, Bandrabhan, River Narmada ; 22°47′29″N, 77°46′50″E, ca. 280 [300] m.a.s.l.; 23 Feb.-24 Feb. 2008; M. Jäch, S. and P. Sharma leg.; NHMW • 1 spec.; Chhindawara Distr., ca. 10 km E Matkuli, near Mahul Jhir E of Jhirpa , Bhadhua Chora (stream); 22°35′59″N, 78°35′30″E, 400 m. a.s.l.; 28 Feb. 2008; M. Jäch, S. and P. Sharma leg.; NHMW • 5 spec., Hoshangabad Distr., ca. 8 km SSE Matkuli, Satpura range, River Denwa , 22°34′29″N, 78°29′43″E; ca. 400 m. a.s.l.; 28 Feb. 2008; M. Jäch, S. and P. Sharma leg.; NHMW • 4 spec.; Hoshangabad Distr., Satpura Range, N part of Satpura NP, head of River Denwa Reservoir , Lagdha Beta , Sona Bhadra (stream); 22°31′38″N 78°11′18″E; 365 [ca 350] m.a.s.l.; 29 Feb. 2008; M. Jäch, S. and P. Sharma leg.; NHMW . - Karnataka • 2 spec.; Udupi Distr. E Bhatkal, Kollur ; [13°51′48″N, 74°48′38″E]; [ca 100 m. a.s.l.]; 26 May-29 May 2006; Z. Kejval leg; NMPC. - Rajasthan • 2 spec.; Sariska ; [27°15′55″N, 76°24′24″E]; [ca 400 m. a.s.l.]; 16 Aug. 1989; A. Riedel leg.; ZSMG • 1 spec.; NW Dungarpur , ca. 250 m along river; 23°52′N 73°41′E [23°51′60″N, 73°40′60″E]; [ca 300 m. a.s.l.]; 1 Feb.-2 Feb. 2006; Z. Kejval leg; NMPC. - Tamil Nadu • 1 spec.; 5 km E Nagercoil ; [8°11′9″N, 77°24′56″E]; [ca 50 m. a.s.l.]; 16 Jan. 1994; D. Boukal and Z. Kejval leg.; HFCB . - Uttarakhand • 1 spec.; Tanakpur ; [29°03′60″N, 80°05′60″E]; [260 m. a.s.l.]; HGC; BMNH • 1 spec.; Haridvar, Chila ; [29°56′46″N, 78°9′52″E]; 300 m. a.s.l.; 5 Aug.-14 Aug. 1994; M. Valenta leg.; ZSMG.

Redescription.

Total length 3.10-3.45 mm and maximum width 1.65-1.85 mm (N = 25). See also Supplementary file 4. - Head ferruginous with two dark fronto-lateral spots (Fig. 5C ). Pronotum ferruginous with bilobed black band along posterior margin and medial black streak along anterior margin. Elytron blackish with typical testaceous markings consisting of two subbasal spots, premedian and postmedian transverse bands and preapical spot. Punctation of head dense, distance between punctures smaller than puncture diameter. Punctures fine on clypeus, become progressively larger posteriorly on frons, occipital part posterior to eyes impunctate. Setiferous punctures present in shallow but distinct fronto-clypeal depressions and as a row along inner margin of eyes. Reticulation consisting of shallowly impressed, polygonal meshes on clypeus; posterior part of frons smooth. Impunctate occipital part posterior to eyes coarsely microreticulate. Pronotal disc with posterior depression less prominent but clearly distinguishable. Punctation dense, distances between punctures smaller than puncture diameter. Punctures setiferous, finer on disc, becoming coarser on margin and sides. Surface between punctures microreticulate with shallowly impressed, polygonal meshes. Elytra broadest at midlength, keels prominent. Punctation dense, distance between punctures approximately equal to puncture diameter. Punctures finer along suture, costae and lateral margin, coarser on disc. Surface between punctures microreticulate with well impressed polygonal meshes. Prosternal process elongate, narrowed at apex, apically keeled. Abdomen with five ventrites (V1 to V5); V1 with 6-9 macropunctures in one row while V2 with 3-5 macropunctures on each side, arranged randomly in two rows. Punctures on V2 to V5 setiferous; lateral depression on V3 to V5 prominent; reticulation of V2 to V5 consists of polygonal meshes. Median lobe of aedeagus gradually curved, tapering apically, apex pointed; with a basal process (Fig. 6Ca). Parameres with short setae in apical half, apex blunt, inner margin not sinuate (Fig. 6Cb). Spermatheca as in (Fig. 8C )-spermathecal spine straight, short and broad.

Collection circumstances.

The species was found in pools, ponds, tanks, reservoirs and slow flowing streams, frequently with P. nilssoni sp. nov. This species was also found in the same habitat as P. bistroemi sp. nov in Aimcombu, Kerala.

Distribution.

India (Bihar, Delhi, Goa, Gujarat, Jharkhand, Kerala, Madhya Pradesh, Maharashtra, Orissa, Tamil Nadu, Uttar Pradesh, West Bengal, Telangana), Nepal, Pakistan, Iran ( Ghosh and Nilsson 2012; Jaiswal et al. 2020).

Figures

Figure 5. Dorsal habitus of Indian Peschetius. A P. bistroemi sp. nov. (Holotype) B P. nilssoni sp. nov. (Paratype- a longitudinal spot, b transverse spot; Amboli, Maharashtra) C P. quadricostatus (Amboli, Maharashtra) D P. toxophorus (a uninterrupted transverse band; Kotagiri, Tamil Nadu). (Body length: A 3.04 mm, B 3.15 mm, C 3.40 mm, D 3.35 mm).

Figure 6. Male genitalia of Indian Peschetius (a. median lobe; b. paramere; bx. tapering of paramere). A P. bistroemi sp. nov. (holotype) B P. nilssoni sp. nov. (holotype) C P. quadricostatus (Jejuri, Maharashtra) D P. toxophorus (Satara, Maharashtra). Scale bars: 100 µm (A, B, C, D).

Figure 8. Female spermatheca of Indian Peschetius. A P. bistroemi sp. nov. (paratype; Mukkada, Kerala) B P. nilssoni sp. nov. (a spermathecal spine; paratype; Ane, Maharashtra) C P. quadricostatus (Ane, Maharashtra) D P. toxophorus (a spermathecal spine; Satara, Maharashtra). Scale bars: 100 µm (A, B, C, D).