Cremastobaeus robustus 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 : 2030-2032

Cremastobaeus robustus Veenakumari sp. nov.

( Figure 19 (a–h))

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Holotype: Female. Body length = 1.53 mm; (m = 1.49 (1.45–1.53) mm, SD = 0.06, n = 2)

Colour ( Figure 19 (a))

Head, mesosoma black; T1–T3 honey brown except for light brown band on posterior T1; T4–T7 brown-black; A1–A4 yellow-brown, A2–A4 with red tinge; remaining antennomeres brown-black, clava a shade darker than preceding antennomeres; eyes silvery; mandibles red-brown; legs yellow.

Head ( Figure 19 (b,c,f))

FCI = 1.46; LCI = 0.91; IOS 0.44× width of head; POL>LOL in ratio of 9.1:5.6; lateral ocellus almost contiguous with inner orbit; eye large (L:W = 17.2:15.4), with sparse white setae; frontal depression with transverse striae; vertex coriaceous reticulate; gena bulging, coriaceous reticulate; length and width of antennomeres A1–A 8 in ratio of 12.4:4.2, 6.5:4.9, 5.5:4.5, 3.5:3.9, 3.7:3.4, 3.6:3.6, 3.9:3.2, respectively; length and width of clava 13.1:6.1; radicle 0.29× as long as A1.

Mesosoma ( Figure 19 (c–e,h))

Mesoscutum (L:W = 19.9:25.2) reticulate, with long setae; upper lateral pronotal area reticulate, followed by a smooth band, medially transversely striate, ventrally reticulate; netrion smooth; speculum with several transverse striae; mesepimeral sulcus foveate; mesopleural depression smooth; ventral mesopleuron reticulate; metapleuron above transverse metapleural sulcus smooth, striate beneath; paracoxal sulcus foveate; mesoscutellum (L:W = 7.2:15.9) rectangular, coriaceous reticulate, with long setae; posterior mesoscutellar sulcus foveate with a smooth posterior margin; metascutellum rectangular, 7× as wide as long, foveate; metanotal trough foveate; lateral propodeal area of either side wide apart and predominantly smooth; fore wing (L:W = 86.5:29.1) and hind wing (L: W = 71.6:10.5) hyaline with dense microtrichia; length of marginal cilia of fore wing and hind wing 0.08× and 0.31× width of their wings, respectively; length of submarginalis: marginalis: stigmalis: postmarginalis in ratio of 35.7:3.2:7.0:25.6, respectively.

Metasoma ( Figure 19 (g))

(L:W = 85.1:33.0); T1 with a broad weakly striate hump; T1 entirely costate, costae converging postero-medially; T2 with short basal foveae, remainder costate; T3 and T4 with a smooth band anteriorly, followed by a transverse row of reticulations, remainder costate; space between costae narrow; T5–T6 reticulate; length and width of tergites T1– T 7 in ratio of 18.4:18.5, 11.7:28.5, 14.2:33.2, 13.6:30.0, 10.2:25.6, 7.3:20.7, 9.7:8.6, respectively; T1 longest of all tergites followed by T3.

Material examined

Holotype: Female ( ICAR / NBAIR / P1030 ), INDIA: Odisha: Baramunda, Puri road, 20.2761°N, 85.7805°E, YPT, 02.II.2016, KV . Paratype: 1 female, ( ICAR / NBAIR / P1031 ), Tamil Nadu: Theni, Periyakulam , 10.1188°N, 77.5485°E, 281 m, YPT, 16 .VIII .2013, ARK.

Male

Unknown.

Etymology

This species is named ‘ robustus ’ referring to the large metasoma. The name is treated as an adjective.

Diagnosis

This species can be distinguished from other species of Cremastobaeus with horns on T1 using the following combination of character states: horn on T1 striate, costae on T1 converging postero-medially, a very wide metasoma and finely reticulate T5–T6.

Figures

Figure 19. Bright field images of Cremastobaeus robustus sp. nov. (female) (a) Habitus (dorsal view); (b) frons; (c) head and mesosoma; (d) meso- and metascutellum; (e) pleuron and horn on T1; (f) antenna; (g) metasoma; (h) wings.