Cremastobaeus longigaster 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 : 2013-2015

Cremastobaeus longigaster Veenakumari sp. nov.

( Figure 11 (a–h))

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Holotype: Female. Body length = 1.36mm; (m = 1.38 (1.36–1.41) mm, SD = 0.02, n = 4)

Colour ( Figure 11 (a))

Head and mesosoma black; metasoma brown-grey; A1 yellow with weak black patches, A2–A4 yellow with a tinge of red, A5–A7 yellow-brown with uneven patches of black, remaining antennomeres dark brown-black, clava darker than A8; mandibles red-brown; legs pale yellow.

Head ( Figure 11 (b,f,h))

FCI = 1.28; LCI = 0.87; IOS 0.44× width of head; POL>LOL in ratio of 9.7:6.1; lateral ocellus contiguous with orbit; eye large (L:W = 17.3:16.7), with not so dense white setae; frontal depression anteriorly narrow, posteriorly wide with uneven transverse striae; vertex and gena coriaceous reticulate; length and width of antennomeres A1–A 8 in ratio of 12.7:3.8, 5.3:4.2, 5.6:3.6, 3.3:2.8, 3.7:2.8, 3.7:2.6, 2.7:3.6, respectively; length and width of clava 15.0:7.1; radicle 0.25× as long as A1.

Mesosoma ( Figure 11 (d,e,g,h))

Mesoscutum (L:W = 19.1:20.3) coriaceous reticulate with dense long setae; upper lateral pronotal area reticulate, remainder predominantly smooth; netrion smooth, foveae on anterior margin not distinct; speculum with several transverse striae; mesepimeral sulcus foveate; mesopleural depression smooth; ventral mesopleuron weakly reticulate; entire metapleuron predominantly smooth with two to three striae antero-ventrally; paracoxal sulcus not distinct; mesoscutellum (L:W = 8.3:13.7) rectangular, finely reticulate, setose; posterior mesoscutellar sulcus foveate with a smooth band beneath; metascutellum triangular (L:W = 3.0:9.0), anteriorly weakly punctate, posteriorly smooth and not foveate on anterior margin; metanotal trough foveate; lateral propodeal area predominantly smooth; fore wing (L:W = 83.3:29.5) and hind wing (L:W = 71.5:10.4) hyaline with dense microtrichia; length of marginal cilia of fore wing and hind wing 0.15× and 0.48× width

of their wings, respectively; length of submarginalis: marginalis: stigmalis: postmarginalis in ratio of 30.8:5.5:7.1:30.4, respectively.

Metasoma ( Figure 11 (c))

(L:W = 65.8:22.1); T1 entirely costate except for a smooth band posteriorly; T2 without distinct basal foveae, entirely costate except for a smooth posterior margin; T3 and T4 costate except for an anterior and posterior smooth margin; T5 anteriorly with a smooth margin, followed by costae extending half the length of tergite, remainder reticulate; T6–T7 smooth to reticulate; length and width of tergites T1–T 7 in ratio of 12.6:12.6, 12.1:18.6, 10.6:21.1, 9.4:20.7, 9.2:18.9, 8.5:13.7, 4.3:4.0, respectively; T1 longest of all tergites followed by T2.

Variation

Basal foveae on T2 present in some paratypes .

Male

Unknown.

Material examined

Holotype: Female ( ICAR / NBAIR / P1130 ), INDIA: Tamil Nadu: Pechiparai , 8.1423°N, 77.2004°E, 58 m, SN, 13.XI.2011, KV . Paratypes: 1 female ( ICAR / NBAIR / P1131 ), Uttar Pradesh: Aligarh, Aligarh Muslim University ( AMU), AMU agriculture farm, 27.9000°N, 78.0880°E, 189 m, SN, 13 .IX .2006, PM; 1 female ( ICAR / NBAIR / P1132 ), Karnataka: Mudigere, College of Horticulture , 13.1162°N, 75.6326°E, 976 m, YPT, 30 .IX .2015, PM; 1 female ( ICAR / NBAIR / P1269 ), Karnataka: Bengaluru, Jarakabande Kaval , 13.1554°N, 92.5857°E, 921 m, YPT, 08 .I .2014, KV.

Etymology

This species is named ‘ longigaster ’, which means elongated metasoma in Latin. The name is treated as noun in apposition.

Diagnosis

This species is distinct from all others due to the combination of the following character states: a finely reticulate mesoscutellum, a smooth triangular metascutellum which is anteriorly weakly punctate and a predominantly smooth lateral propodeal area.

Figures

Figure 11. Bright field images of Cremastobaeus longigaster sp. nov. (female) (a) Habitus (dorsal view); (b) frons; (c) metasoma; (d) pleuron; (e) meso- and metascutellum; (f) antennae; (g) wings; (h) head and mesosoma.