Cremastobaeus eila 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 : 2002-2004

Cremastobaeus eila Veenakumari sp. nov.

( Figure 5 (a–h))

www.zoobank.org/ urn:lsid:zoobank.org:act:D390BE8D-4AB3-4087-80E1-C3F630521194

Holotype: Female. Body length = 1.27 mm; (m = 1.27 (1.20–1.37) mm, SD = 0.04, n = 14)

Colour ( Figure 5 (a))

Head and mesosoma black; metasoma grey-brown; A1 golden yellow, A2–A4 dark brown with patches of yellow, remaining antennomeres dark brown, clava darker than preceding antennomeres; mandibles red-brown; legs yellow.

Head ( Figure 5 (b,c,f))

FCI = 1.43; LCI = 0.91; IOS 0.49×width of head; POL>LOL>OOL in ratio of 10.7:6.4:0.7; eye large (L:W = 17.5:16.9), with dense white setae; frontal depression with sparse transverse striae; vertex coarsely sculptured with sparse irregular transverse striations, setose; gena reticulate; length and width of antennomeres A1–A 8 in ratio of 15.5:3.9, 5.8:3.8, 4.7:3.4, 3.4:2.9, 3.8:2.9, 3.2:3.0, 2.9:3.7, respectively; length and width of clava 16.3:7.2; radicle 0.14× as long as A1.

Mesosoma ( Figure 5 (c,d,g,h))

Mesoscutum (L:W = 21.2:24.4) coriaceous reticulate, setose; lateral pronotal area dorsally reticulate, ventrally smooth; netrion smooth; speculum with several transverse striae; mesepimeral sulcus foveate; mesopleural depression smooth to reticulate; ventral mesopleuron finely reticulate; entire metapleuron predominantly smooth except for two striae ventrally; paracoxal sulcus foveate; metapleuron foveate postero-ventrally; mesoscutellum (L:W = 8.9:16.8) trapezoid, coriaceous reticulate, setose; posterior mesoscutellar sulcus foveate with a smooth band beneath; metascutellum triangular (L:W = 3.0:8.7), vertically striate with foveae in between striae posteriorly, posterior margin crenulate; lateral propodeal area unevenly rugose with ventral margin foveate; fore wing (L: W = 94.3:31.7) and hind wing (L:W = 77.9:10.2) hyaline with dense microtrichia; length of marginal cilia of fore wing and hind wing 0.17× and 0.58× width of their wings, respectively; length of submarginalis: marginalis: stigmalis: postmarginalis in ratio of 37.8:5.3:7.8:32.9, respectively.

Metasoma ( Figure 5 (e))

(L:W = 59.0:25.4); metasoma short, 2.32× as long as wide; T1 entirely costate except for a smooth band posteriorly; T2 with basal foveae beneath which costate except for a narrow smooth posterior margin; T3 costate except for a smooth posterior margin; T4–T5 anteriorly costate posteriorly reticulate; remaining tergites reticulate to smooth;

length and width of tergites T1–T 7 in ratio of 13.7:12.0, 10.1:19.1, 10.4:24.8, 9.6:24.3, 7.8:19.0, 4.1:11.0, 3.5:4.6, respectively; T1 longest of all tergites; T2 and T3 subequal.

Variation

In some specimens the metasoma is brown, and costae on T3 extend up to posterior margin.

Male

Unknown.

Material examined

Holotype: Female ( ICAR / NBAIR / P1134 ), INDIA: Kerala: Thrissur, Chowannur , Parampadam , 10.6506°N, 76.0783°E, 42 m, SN, 10.I.2012, FRK . Paratypes: 2 females ( ICAR / NBAIR / P1135 , P1136 ), same data as holotype, FRK; 1 female ( ICAR / NBAIR / P1137 ), Karnataka: Bengaluru, Jarakabande Kaval , 13.1554°N, 92.5857°E, 921 m, MT, 23 .I .2015, KV; 1 female ( ICAR / NBAIR / P1138 ), Karnataka: Mandya , 12.5201°N, 76.8998°E, 675 m, SN, 17 .X .2014, PM; 1 female ( ICAR / NBAIR / P1139 ), Karnataka: Mandya, Srirangapatna , 12.4232°N, 76.6936°E, 676 m, SN, 04 .I .2012, KV; 5 females ( ICAR / NBAIR / P1140 , P1141 , P1142 , P1143 , P1144 ), Odisha: Puri, Chandanpur , 19.8872 ʹ °N, 85.8140°E, 14 m, SN, 29 .XI .2007, PM; 1 female ( ICAR / NBAIR / P1145 ), Odisha: Puri, Matiapada , 19.9204°N, 86.1000°E, 5 m, SN, 01 .XII .2007, PM; 1 female ( ICAR / NBAIR / P1244 ), Kerala: Thrissur, Kadavallur , 10.7173°N, 76.0690°E, 20 m, SN, 10 .I .2012, FRK; 1 female ( ICAR / NBAIR / P1245 ), Karnataka: Bengaluru, Hebbal , 13.0360°N, 77.5969°E, 906 m, MT, 03 .IV .2012, KV.

Etymology

This species is named ‘ eila ’, which means ‘Mother Earth’ in Sanskrit. The name is treated as noun in apposition.

Diagnosis

Cremastobaeus eila is closer to C. nicobarensis but can be differentiated from it by the following combination of character states. In C. eila T1 is the longest tergite being at least 1.3× the length of either T2 or T3, the head and mesosoma together at least 1.5× as long as the grey-brown metasoma. In C. nicobarensis the head and mesosoma are together at most 1.2× the length of the golden brown metasoma; T1 subequal in length to either T2 or T3. Cremastobaeus eila resembles C. yoganarasimha also but can be distinguished from it by the longer metasoma in the latter.

Figures

Figure 5. Bright field images of Cremastobaeus eila sp. nov. (female) (a) Habitus (dorsal view); (b) frons; (c) head and mesosoma; (d) meso- and metascutellum; (e) metasoma; (f) antenna; (g) pleuron; (h) wings.