Euscelinus sarawacus Westwood, 1882

Saleh, Alaa T. & Gadallah, Neveen S., 2024, Parasitoid wasps (Hymenoptera: Braconidae: Doryctinae) reared from grape cane borer beetle Amphicerus bimaculatus (Olivier) (Bostrichidae) inhabiting pomegranate trees Punica granatum L. (Lythraceae) in Syria, new records and new tritrophic associations, Journal of Natural History 58 (13 - 16), pp. 449-470 : 455-459

publication ID	https://doi.org/ 10.1080/00222933.2024.2314967
persistent identifier	https://treatment.plazi.org/id/835E0A68-1706-FFA1-86AD-5575FC95FBBE
treatment provided by	Plazi
scientific name	Euscelinus sarawacus Westwood, 1882
status

Treatment

Euscelinus sarawacus Westwood, 1882 View in CoL

( Figures 5 View Figure 5 A-G, 6 A–E, 7A, B)

Euscelinus sarawacus Westwood, 1882, p. 26 View in CoL , sex not indicated.

Material examined. 1♀, 1♂.

Diagnosis. Female: Body length: 4.1 mm (excluding ovipositor).

Body dark brown to dark ferruginous ( Figure 5A, B View Figure 5 ), with some paler areas (see Figures 5D, E View Figure 5 , 6A, B View Figure 6 , 7A View Figure 7 ); legs as in Figure 6C View Figure 6 ; antenna pale brown, darkened towards apex ( Figure 5F View Figure 5 ). Forewing ( Figure 6D View Figure 6 ) with pterostigma dark brown, pale yellow at base; antenna shorter than body, 0.65× as long as body, slender, with all flagellomeres distinctly longer than wide, 27-segmented; scape relatively short and swollen, 1.6× as long as wide, distinctly shorter than F1, 0.58× as long as F1, F1 coarsely rugose along its ventral basal two-thirds, smooth dorsally; anterior surface of mesoscutum conspicuously elevated or raised above pronotum (subvertical) when seen in lateral view, smooth and shiny anteriorly and laterally, coarsely rugose medially to posterior margin; notauli present anteriorly, crenulate, shallow posteriorly; fore tibia with a single row of three or more short, oblique, dark spines on dorsal surface near to middle; metafemur robust, swollen, 2.2× as long as its maximum width, with nine unequal whitish sharp teeth ventrally, of which third is the longest ( Figure 6C View Figure 6 ); metasoma ( Figure 7A View Figure 7 ) oval, non-petiolate; T1 1.5× as long as apical width, coarsely rugose, with pale baso-lateral protrusion, with two longitudinal median carinae that are widely separated at basal fourth and narrowly separated in the reminder; T2 wider than long, 0.57× as long as wide, with basal area finely rugose, rest of T2 and remaining tergites nearly smooth and shiny; ovipositor long, 1.1× as long as metasoma, minutely serrated along its whole length, more distinct along the black area.

Male. Body length: 3.44 mm.

Distinctly slenderer than the female, and differs from female in the following: body smaller and paler ( Figure 5C View Figure 5 ), basal half of metatibia whitish; metasoma distinctly slender ( Figures 5C View Figure 5 , 7B View Figure 7 ); antenna 23-segmented ( Figure 5G View Figure 5 ); F1 slightly shorter than F2 ( Figure 5G View Figure 5 ); T1 1.64× as long as its apical width ( Figure 7B View Figure 7 ); T2 0.7× as long as wide ( Figure 7B View Figure 7 ); propodeal dorsal surface nearly smooth and shiny baso-laterally.

Distribution. Australia, India, Israel-Palestine, Malaysia, Myanmar, Pakistan, Philippines, Thailand, USA ( Yu et al. 2016; Ghahari et al. 2022), Syria (new record).

Host records. Recorded as a parasitoid of several coleopteran hosts of the family Bostrichidae : Amphicerus bimaculatus on Punica granatum L. ( Halperin 1986; Čapek 1992; present study), Dinederus minutus (Fabricius) on Bambusa sp. ( Poaceae ), Scobisia chevieri (Villa and Villa) on Ceratonia siliqua L. ( Fabaceae ), Sinoxylon ceratoniae (Linnaeus) on Dalbergia sisoo Roxb and Delonix regia RAF ( Fabaceae ), S. sexdentatus (Olivier) on Acacia sp. ( Fabaceae ) ( Halperin 1986; Čapek 1992). In addition to Heterobostrychus aequalis (Waterhouse) ( Beeson and Chatterjee 1935; Belokobylskij et al. 2004b), and Sinoxylon unidentatum (Fabricius) ( Beardsley 1961; Belokobylskij et al. 2004b). Based on Gupta and van Achterberg (2022), this species has been reared from Mangifera indica Linnaeus ( Anacardiaceae ) by Sharma (1983, as Euremeros mangifera Sharma).

Comments. Euscelinus sarawacus is a new record for the Syrian fauna, reared from Amphicerus bimaculatus attacking P. granatum . Characters of the Syrian specimens agree with almost all diagnosis of Australasian specimens mentioned in Belokobylskij et al. (2004b), except for the following: antennal F1 nearly straight, slightly longer than F1 ( Figure 5F View Figure 5 ) (curved, shorter than F 1 in the generic diagnosis); hind tibia without spines along its dorsal surface (with several thick spines along dorsal surface in the generic diagnosis); hind basitarsus about as long as following tarsomeres combined ( Figure 6C View Figure 6 ) (0.6× as long as following tarsomeres combined in the generic diagnosis); vein 1 m-cu more or less interstitial ( Figure 6D View Figure 6 ) (postfurcal in generic diagnosis); ovipositor slightly longer than metasoma ( Figure 7A View Figure 7 ) (shorter than metasoma in the generic diagnosis).

It also agrees with Čapek’s (1992) characters of the Israel specimens; however, it differs in the following: only protibia of the Syrian specimens with a row of short setae along its surface (all tibiae of Israel specimens with such row of spines); male antenna 23- segmented ( Figure 5G View Figure 5 ) (16–22-segmented in Israelian males); metasomal T 1 in male 1.64× as long as its apical width ( Figure 7B View Figure 7 ) (1.8× in Israel males). It also agrees with Figure 3 View Figure 3 ( Čapek 1992, p. 193), except for the absence of the row of spines along dorsal side of metatibia.

The Syrian male greatly resembles Figure 4 View Figure 4 of the Indian male ( Gupta and van Achterberg 2022, p. 581).

Tribe HECABOLINI Foerster 1863