Cremastobaeus foveatus 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 : 2004-2007

Cremastobaeus foveatus Veenakumari sp. nov.

( Figure 6 (a–g))

www.zoobank.org/ urn:lsid:zoobank.org:act:5BD0A9E0-989C-4617-B2AC-927ED93FF214

Holotype: Female. Body length = 1.42 mm; (m = 1.54 (1.42–1.67) mm, SD = 0.12, n = 3)

Colour ( Figure 6 (a))

Head and mesosoma black; metasoma maroon-black with posterior tergites darker; A1–A4 yellow-brown except red-brown tinge on A2–A4, A5–A6 yellow-brown,

remaining antennomeres dark brown, clava darker than A7–A8; mandibles redbrown; legs yellow-brown; posterior margin of mesoscutellum and lateral propodeal area light brown.

Head ( Figure 6 (b,c,g))

FCI = 1.35; LCI = 0.90; IOS 0.46× width of head; POL>LOL in ratio of 12.9:6.7; lateral ocellus contiguous with orbit; eye large (L: W = 17.5:16.3), with not so dense white setae; frontal depression with uniformly spaced transverse striae; vertex and gena coriaceous reticulate; length and width of antennomeres A1–A 8 in ratio of 12.4:3.6, 6.4:4.1, 6.6:3.2, 4.6:2.9, 3.8:2.4, 3.7:2.3, 3.2:2.7, respectively; length and width of clava 12.7:6.8; radicle 0.25× as long as A1.

Mesosoma ( Figure 6 (c,d,f))

Mesoscutum (L:W = 20.9:26.1) anteriorly reticulate and posteriorly coriaceous reticulate, setose; lateral pronotal area entirely coriaceous reticulate with sparse weak vertical striae ventrally; netrion smooth; speculum with several transverse striae; mesepimeral sulcus foveate; mesopleural depression smooth to reticulate; ventral mesopleuron finely reticulate; metapleuron smooth above transverse metapleural sulcus and striate beneath; paracoxal sulcus foveate; mesoscutellum (L:W = 8.9:17.4) trapezoid, coriaceous reticulate, setose; posterior mesoscutellar sulcus foveate with a smooth band beneath; metascutellum rectangular (L:W = 2.0:11.4), with a medial carina and uneven sculpture on either side of it; propodeum broadly excavate medially; lateral propodeal area unevenly rugose; fore wing (L:W = 86.1:31.5) and hind wing (L:W = 71.5:11.5) hyaline with dense microtrichia; length of marginal cilia of fore wing and hind wing 0.11× and 0.37× width of their wings, respectively; length of submarginalis: marginalis: stigmalis: postmarginalis in ratio of 35.6:5.6:6.5:25.1, respectively.

Metasoma ( Figure 6 (e))

(L:W = 65.3:26.9); T1 with basal foveae, entire tergite costate, with smooth posterior margin; T2 with basal foveae followed by costae extending the entire length of tergite except for a smooth posterior margin; T3 with a smooth anterior margin, followed by reticulations and then costae extending almost the entire length of tergite; T4 with anterior margin smooth, followed by reticulations and then sparse costae and reticulations; remaining tergites weakly reticulate; length and width of tergites T1–T 7 in ratio of 13.7:16.1, 11.8:22.9, 12.4:27.3, 11.2:26.6, 7.5:20.6, 5.3:14.3, 3.5:5.1, respectively; T1 longest of all tergites followed by T3.

Male

Unknown.

Material examined

Holotype: Female ( ICAR / NBAIR / P1148 ), INDIA: Tamil Nadu: Theni, Periyakulam , 10.1188°N, 77.5485°E, 281 m, YPT, 16.VIII.2013, ARK . Paratypes: 1 female, ( ICAR / NBAIR / P1149 ), Karnataka: Tumkur, Kunigal , 13.0201°N, 77.0348°E, 784 m, SN, 19 .IX .2014, KV; 1 female, ( ICAR / NBAIR / P1170 ), Karnataka: Kanakapura, Sangam, 12.2836°N, 77.4333°E, 370 m, SN, 12 . VII .2011, KV.

Etymology

This species is named ‘ foveatus ’ referring to the basal foveae on first tergite. The name is treated as an adjective.

Diagnosis

Cremastobaeus foveatus is similar to C. luteus and C. valmikii but is different from them in the following characters states: C. foveatus has a rectangular metascutellum which is at

least 4.5× as wide as long, T1 with distinct basal foveae whereas in C. luteus and C. valmikii metascutellum is at most 3.5× as wide as long and the basal foveae are absent on T1.

Figures

Figure 6. Bright field images of Cremastobaeus foveatus sp. nov. (female) (a) Habitus (dorsal view); (b) frons; (c) head and mesosoma; (d) meso- and metascutellum; (e) metasoma; (f) pleuron; (g) antennae.