Cremastobaeus tanugatra 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 : 2034-2037

Cremastobaeus tanugatra Veenakumari sp. nov.

( Figure 21 (a–g))

www.zoobank.org/ urn:lsid:zoobank.org:act:37EBB28D-01AE-4883-A9BE-F24678436775

Holotype: Female. Body length = 1.50 mm; (m = 1.53 (1.31–1.71) mm, SD = 0.12, n = 12)

Colour ( Figure 21 (a))

Head, mesosoma black; horn on metasoma dark brown, remainder of T1 orange-brown, T2–T3 orange-brown, T4 dark brown with anterior margin orange-brown, remaining tergites black; A1–A8 yellow-brown, clava dark brown; eyes black; mandibles dark brown; legs pale yellow to light brown.

Head ( Figure 21 (b,d))

FCI = 1.39; LCI = 1.06; IOS 0.42× width of head; POL>LOL in ratio of 9.7:5.6; lateral ocellus almost contiguous with inner orbit; eye large (L:W = 17.5:16.0), with dense white setae; frontal depression deep, with sparse short transverse striations in dorsal half; vertex and gena reticulate; length and width of antennomeres A1–A 8 in ratio of 12.6:4.0, 5.9:4.4, 6.1:4.0,

4.1:2.4, 3.0:2.5, 4.5:2.8, 2.4:3.6, respectively; length and width of clava 14.2:6.0; radicle 0.23× as long as A1.

Mesosoma ( Figure 21 (e–g))

Mesoscutum (L:W = 21.3:24.2) coriaceous reticulate, with long setae; upper lateral pronotal area weakly reticulate and lower lateral pronotal area with sparse weak striae and reticulate antero-ventrally; netrion smooth; speculum with transverse striae; mesepimeral sulcus foveate; mesopleural depression predominantly smooth; ventral mesopleuron reticulate; metapleuron above transverse metapleural sulcus smooth; metapleuron beneath transverse metapleural sulcus striate in ventral three-quarters, remainder smooth; paracoxal sulcus foveate; mesoscutellum (L:W = 7.6:12.7) semicircular, coriaceous reticulate, with long setae; posterior mesoscutellar sulcus foveate with a smooth margin beneath; metascutellum present as a broad rectangular plate (L:W = 2.2:10.7), foveate; propodeum broadly excavate medially; lateral propodeal area predominantly smooth and foveate ventrally; fore wing (L:W = 86.7:30.4) and hind wing (L:W = 70.8:10.8) hyaline with dense microtrichia; length of marginal cilia of fore wing and hind wing 0.07× and 0.38× width of their wings, respectively; length of submarginalis: marginalis: stigmalis: postmarginalis in ratio of 35.3:6.2:6.9:23.1, respectively.

Metasoma ( Figure 21 (c))

(L:W = 82.5:25.2); T1 with a smooth horn antero-medially, remainder costate, with few costae extending on to base of horn; T2 with short basal foveae followed by costae extending the entire length of tergite; T1 and T2 posteriorly with a narrow smooth band; T3 weakly reticulate on anterior margin, remainder costate the entire length of tergite except for smooth posterior margin; T4 costate the entire length; T5 with reticulations on anterior margin, followed by costae extending 0.7× length of tergite, remainder with weak reticulations; space between costae in T1–T5 smooth; T6–T7 predominantly smooth; length and width of tergites T1–T 7 in ratio of 17.4:14.8, 13.1:21.4, 13.0:24.7, 11.1:23.4, 9.8:19.4, 9.1:15.3, 7.9:6.5, respectively; T1 longest of all tergites; T2 and T3 subequal in length.

Male

Unknown.

Material examined

Holotype: Female ( ICAR / NBAIR / P1053 ), INDIA: Karnataka: Tumkur, Kunigal , 13.0201°N, 77.0348°E, 784 m, YPT, 22.I.2016, KV . Paratypes: 2 females, ( ICAR / NBAIR / P1054 , P1055 ), same data as holotype, KV; 1 female ( ICAR / NBAIR / P1056 ), same data as holotype, 10 . XII .2013, KV; 1 female ( ICAR / NBAIR / P1057 ), same data as holotype, 26 .X .2013, KV; 1 female ( ICAR / NBAIR / P1058 ), Tamil Nadu: Vellore, Yelagiri, Pudur , 12.5842°N, 78.6429°E, 997 m, YPT, 18 . VI .2016, PM; 2 females ( ICAR / NBAIR / P1059 , P1060 ), Tamil Nadu: Chidambaram, Annamalai University , 11.3986°N, 79.6950°E, 17 m, YPT, 03 .VII .2016, PM; 1 female ( ICAR / NBAIR / P1061 ), same data as P1060, 01 .VII .2016, PM; 1 female ( ICAR / NBAIR / P1115 ), Tamil Nadu: Lower Pulney Hills , Thadiyankudisai, HRS, 10.2995°N, 77.7117°E, 990 m, YPT, 26 . XI .2016, PM; 1female ( ICAR / NBAIR / P1133 ), same data as holotype, 05 .iv .2016, KV; 1 female ( ICAR / NBAIR / P1266 ), Tamil Nadu: Theni, Periyakulam, Horticulture College and Research Institute , 10.1282°N, 77.5998°E, 297 m MT, 19 .VIII .2013, ARK.

Etymology

This species is named ‘ tanugatra ’, which means ‘slim’ in Sanskrit referring to the narrow metasoma. The name is treated as a noun in apposition.

Diagnosis

This species is closer to C. robustus , but differs from it in the following character states. In C. tanugatra , the horn on T1 is anteriorly smooth; the metasoma is narrow and at least 3.2× as long as wide; T1–T5 striate, the space between the costae is broad and smooth; T6 medially smooth and laterally reticulate. In C. robustus the horn on T1 is striate; the

metasoma is wide and at most 2× as long as wide; T1–T4 is costate, the space between the costae is narrow; T5–T6 is finely reticulate.

Figures

Figure 21. Bright field images of Cremastobaeus tanugatra sp. nov. (female) (a) Habitus (dorsal view); (b) frons; (c) metasoma; (d) antenna; (e) meso- and metascutellum; (f) pleuron; (g), wings.