Cremastobaeus unicolor Rajmohana, 2014

Kamalanathan, Veenakumari & Mohanraj, Prashanth, 2017, The genus Cremastobaeus Ashmead (Hymenoptera: Scelionidae: Cremastobaeini) from India, Journal of Natural History 51 (33 - 34), pp. 1989-2056 : 2037-2039

Cremastobaeus unicolor Rajmohana, 2014

( Figures 22 (a–h) and 23(a,b))

Female. Body length = 1.38 mm; (m = 1.37 (1.27–1.49) mm, SD = 0.06, n = 20)

Colour ( Figure 22 (a))

Head black; mesosoma dark brown-black; metasoma honey brown; anterior margin of T1 dark brown; metasoma T4–T7 darker than preceding tergites; legs yellow; A1–A4 yellow-

brown, with red tinge on A2–A4; A5–A7 brown; A8 and clava brown-black; mandibles red-brown; posterior margin of mesoscutellum light brown.

Head ( Figure 22 (b,c,h))

FCI = 1.45; LCI = 0.81; IOS 0.42×width of head; POL>LOL>OOL in ratio of 9.5:6.2:0.07; eye large (L:W = 19.4:17.5), setose, setae not very dense; frontal depression with transverse striations; frons and vertex with sparse long setae; vertex coriaceous reticulate; gena reticulate; length and width of antennomeres A1–A 8 in ratio of 13.5:4.1, 5.9:3.3, 5.6:2.8, 4.0:2.3, 4.0:2.7, 4.2:2.9, 3.6:3.9, respectively; length and width of clava 16.1:6.4; clava with rows of sparse long setae.

Mesosoma ( Figure 22 (c–f))

Mesoscutum (L:W = 22.1:24.2) reticulate, setose, setae long; lateral pronotal area weakly reticulate; netrion smooth, striate on anterior margin, broad; mesepimeral sulcus foveate; speculum finely striate; mesopleural depression weakly reticulate; ventral mesopleuron reticulate; entire metapleuron smooth except for striations ventrally; paracoxal sulcus foveate, foveae not distinct; mesoscutellum (L:W = 10.1:15.3) trapezoid, coriaceous reticulate with long setae; posterior mesoscutellar sulcus foveate with a smooth posterior margin; metascutellum triangular, unevenly rugose; metanotal trough foveate, foveae not very distinct; lateral propodeal area unevenly rugose; fore wing (L: W = 91.4:31.5) and hind wing (L:W = 75.9:9.1) hyaline with dense microtrichia; length of marginal cilia of fore wing and hind wing 0.18× and 0.54× width of their wings, respectively; length of submarginalis: marginalis: stigmalis: postmarginalis in ratio of 34.2:3.1:6.7:34.4, respectively.

Metasoma ( Figure 22 (g))

(L:W = 66.2:25.2); T1 fully striate, with crenulate anterior margin, smooth posterior margin; T2 with basal foveae, foveae reducing in size laterad, remainder striate except smooth posterior margin; T3 anteriorly costate, costae extending beyond 0.7× length of tergite, remainder weakly reticulate; T4 same as T3 except costae extending only half the length of tergite, remainder weakly reticulate; T5 anteriorly costate, costae shorter than those on T3 and T4, remainder weakly reticulate; T6 reticulate with posterior margin smooth; sparse black spots present on entire metasoma; length and width of tergites T1–T 7 in ratio of 14.9:13.2, 11.2:20.3, 11.0:24.5, 10.5:23.8, 8.5:19.1, 4.0:12.9, 6.1:8.0 respectively; T1 longest of all tergites.

Male ( Figure 23 (a,b))

Body length = 1.239 mm; (m = 1.266 (1.239 –1.294) mm, SD = 0.03, n = 2)

Similar to female; length and width of antennomeres A1–A 12 in ratio of 12.9:3.7, 4.8:4.0, 5.9:4.3, 5.1:2.8, 5.6:2.6, 5.3:3.1, 5.7:3.1, 6.2:3.2, 5.9:2.9, 4.5:3.4, 9.8:2.7, respectively

Material examined

3 females ( ICAR / NBAIR / P995 , P1002 , P1003 ), INDIA: Andaman Islands: South Andaman, Garacharma , Central Island Agricultural Research Institute , ( CIARI), 11.6129°N, 92.7154° E, 63 m, YPT, 22 .II .2012, KV; 3 females ( ICAR / NBAIR / P996 , P1007 , P1008 ), same data as that of P995, KV; 5 females ( ICAR / NBAIR / P997 , P998 , P999 , P1000 , P1001 ), South Andaman , Sippighat, 11.6103°N, 92.6851°E, 8 m, YPT, 23 .II .2012, KV; 1 female ( ICAR / NBAIR / P1004 ), Little Andaman, Forest Nursery, 10.59°N, 92.54°E, 7 m, SN, 29 .I .2013, KV; 2 females ( ICAR / NBAIR / P1005 , P1006 ), same data as P1004, 10.6218°N, 92.5241°E, 49 m, SN, 28 .I .2013, KV; 3 females ( ICAR / NBAIR / P1009 , P1010 , P1011 ), South Andaman , Chouldary, Bloomsdale, 11.6406°N, 92.6611°E, 15 m, YPT, 26 .III .2016, KV; 2 females ( ICAR / NBAIR / P1012 , P1013 ), same data as P997, 22 .III .2016, KV; 1 female ( ICAR / NBAIR / P1014 ), Kerala: Trivandrum; Vellayani, 8.4350°N, 76.9914°E, 11 m, YPT, 20 .XI .2015, KV; 1 male ( ICAR / NBAIR / P1168 ), same as P1009, KV; 1 male ( ICAR / NBAIR / P1169 ), same as P997, 22 .III .2016, KV.

Remarks

This species is closer to C. longigaster but differs from it in the following combination of character states. In C. unicolor the mesoscutellum is coriaceous reticulate, the metascutellum is rugose with the anterior margin weakly foveate and the lateral propodeal area unevenly rugose. In C. longigaster on the other hand the mesoscutellum is finely reticulate, the metascutellum is anteriorly punctate and posteriorly smooth with no foveae on the anterior margin and the lateral propodeal area is predominantly smooth.

Figures

Figure 22. Bright field images of Cremastobaeus unicolor Rajmohana (female) (a) Habitus (dorsal view); (b) frons; (c) head and mesosoma; (d) meso- and metascutellum; (e) pleuron; (f) wings; (g), metasoma; (h) antenna.

Figure 23. Bright field images of Cremastobaeus unicolor Rajmohana (male) (a) Habitus (dorsal view); (b) antennae.