Cremastobaeus parallelogaster Veenakumari, 2017

Kamalanathan, Veenakumari & Mohanraj, Prashanth, 2017, The genus Cremastobaeus Ashmead (Hymenoptera: Scelionidae: Cremastobaeini) from India, Journal of Natural History 51 (33 - 34), pp. 1989-2056 : 2028-2030

Cremastobaeus parallelogaster Veenakumari sp. nov.

( Figure 18 (a–g))

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Holotype: Female. Body length = 1.39 mm; n = 1

Colour ( Figure 18 (a))

Head and mesosoma black; metasoma dark brown, with T2 and posterior tergites darker than T1 and T3; A1, A5–A8 dark brown with black patches, A2–A4 yellow-brown with red

tinge, clava brown-black; mandibles red-brown; legs yellow-brown, with apical tarsomeres brown-black.

Head ( Figure 18 (b,f))

FCI = 1.36; LCI = 1.01; IOS 0.39× width of head; POL>LOL in ratio of 11.0:5.0; lateral ocellus contiguous with orbit; eye large (L:W = 17.6:16.6), with not so dense white setae; frontal depression striate; vertex coriaceous reticulate, setose; gena coriaceous reticulate; length and width of antennomeres A1–A 8 in ratio of 14.4:4.4, 6.7:4.4, 6.3:4.1, 3.5:3.1, 3.4:3.3, 3.0:3.5, 2.5:4.0, respectively; length and width of clava 13.5:7.2; radicle 0.17× as long as A1.

Mesosoma ( Figure 18 (d–g))

Mesoscutum (L:W = 23.3:25.8) coriaceous reticulate and setose; upper lateral pronotal area reticulate, remainder smooth except for two weak striae ventrally; netrion smooth, foveae on anterior margin increasing in size ventrad; speculum with several transverse striae; mesepimeral sulcus foveate; mesopleural depression reticulate; ventral mesopleuron finely reticulate; metapleuron smooth above transverse metapleural sulcus and entirely striate beneath; paracoxal sulcus foveate; mesoscutellum (L:W = 8.7:16.5) trapezoid, coriaceous reticulate, setose; posterior mesoscutellar sulcus foveate with a smooth band beneath; metascutellum trapezoid in shape (L:W = 3.7:9.4), vertically striate with foveae on anterior margin; lateral propodeal area rugose; fore wing (L: W = 76.2:28.3) and hind wing (L:W = 60.4:10.3) hyaline with dense microtrichia; length of marginal cilia of fore wing and hind wing 0.09× and 0.41× width of their wings, respectively; length of submarginalis: marginalis: stigmalis: postmarginalis in ratio of 31.4:3.9:7.2:21.3, respectively.

Metasoma ( Figure 18 (c))

(L:W = 63.5:24.9); T1 with basal foveae, entirely costate except for a smooth band posteriorly; T2 with basal foveae beneath which costae extend almost entire length of tergite, except for a narrow smooth posterior margin; space between costae reticulate-striate; T3 anteromedially with a smooth band followed by a transverse row of reticulations, beneath which costae present; space between costae in anterior half smooth, while in posterior half reticulate-striate; T4 same as T3 except for smooth space between costae; T5 with uneven reticulations; T6–T7 with uneven sculpture; length and width of tergites T1–T 7 in ratio of 12.3:14.1, 10.9:22.4, 12.1:24.9, 11.8:23.9, 8.0:20.8, 4.6:13.7, 3.4:5.2, respectively; T1 longest of all tergites; T1 and T3 subequal.

Male

Unknown.

Material examined

Holotype: Female ( ICAR / NBAIR / P1147 ), INDIA: Karnataka: Chikkaballapur, Nandi Hills , 13.3702°N, 77.6834°E, 1448 m, SN, 22.XII.2009, KV.

Etymology

This species is named ‘ parallelogaster ’ referring to the lateral margins of tergites 3–4, which are parallel to each other. The name is treated as an adjective.

Diagnosis

The parallel lateral margins of tergites T3 and T4 distinguish this from all other species.

Figures

Figure 18. Bright field images of Cremastobaeus parallelogaster sp. nov. (female) (a) Habitus (dorsal view); (b) frons and antenna; (c) metasoma; (d) pleuron; (e) wings; (f) head and mesosoma; (g) meso- and metascutellum.