Trissolcus comperei (Crawford)

Talamas, Elijah J., Buffington, Matthew L. & Hoelmer, Kim, 2017, Revision of Palearctic Trissolcus Ashmead (Hymenoptera, Scelionidae), Journal of Hymenoptera Research 56, pp. 3-185 : 13-14

Trissolcus comperei (Crawford) Figures 28-29 , 30-34

Trissolcus itoi Ryu syn. n.; http://bioguid.osu.edu/xbiod_concepts/3248; Morphbank9

Telenomus comperei Crawford, 1912: 1 (original description); Baltazar, 1966: 172 (cataloged, type information, distribution).

Trissolcus comperei (Crawford): Masner & Muesebeck, 1968: 72 (type information, generic transfer); Johnson, 1992: 625 (cataloged, type information).

Trissolcus itoi Ryu syn. n., 1984: 37, 52 (original description, keyed).

Description.

0.93-1.51 mm (n=19). Body color: head, mesosoma, and metasoma black.

Head. Color of radicle: black; dark brown. Length of radicle: equal to or greater than width of clypeus. Color of A1-A6 in female: yellow to brown. Color of A7-A11 in female: pale brown to black. Number of basiconic sensilla on A6: 0. Number of basiconic sensilla on A7: 2. Facial striae: absent. Number of clypeal setae: 6. Microsculpture on gena directly above mandibular condyle: absent. Shape of ventral gena in lateral view: narrow. Genal carina: present and extending dorsally to vicinity of lower margin eye. Malar striae: absent. Sculpture of malar sulcus: antero-posteriorly striate. Orbital furrow: uniform in width between midpoint of eye and malar sulcus. Macrosculpture of frons between antennal scrobe and anterior ocellus: absent; strigose, roughly concentric around median ocellus. Preocellar pit: present. Setation of lateral frons: sparse. Punctation of lateral frons: absent. Sculpture directly ventral to preocellar pit: microsculptured. Macrosculpture of lateral frons: horizontally striate, striae of antennal scrobe extending to lateral frons; absent. OOL: separated by less than one ocellar diameter. Hyperoccipital carina: absent. Macrosculpture of posterior vertex: rugulose; absent. Microsculpture on posterior vertex along occipital carina: present. Anterior margin of occipital carina: finely crenulate to smooth.

Mesosoma. Epomial carina: present. Macrosculpture of lateral pronotum directly anterior to netrion: antero-posteriorly striate; finely rugulose. Netrion sulcus: incomplete. Pronotal suprahumeral sulcus in posterior half of pronotum: clearly indicated by cells. Location of pronotal suprahumeral sulcus: posterior half of pronotum. Number of episternal foveae: 3; 2; 1. Course of episternal foveae ventrally: distinctly separate from postacetabular sulcus. Course of episternal foveae dorsally: distinctly separate from mesopleural pit. Subacropleural sulcus: present. Speculum: transversely strigose; with granular microsculpture. Mesopleural pit: extending ventrally into dorsoventral furrow parallel to mesopleural carina. Mesopleural carina: complete; well defined anteriorly, poorly defined to absent posteriorly. Sculpture of femoral depression: concentrically strigose. Patch of striae at posteroventral end of femoral depression: present, striae perpendicular to long axis of femoral depression. Setal patch at posteroventral end of femoral depression: absent. Microsculpture of anteroventral mesopleuron: present throughout. Macrosculpture of anteroventral mesopleuron: irregularly rugulose. Postacetabular sulcus: formed by open crenulae. Mesopleural epicoxal sulcus: formed by open crenulae. Mesofurcal pit: absent. Setation of posteroventral metapleuron: absent. Sculpture of dorsal metapleural area: smooth in anterodorsal corner, coarsely rugose posteriorly; rugose. Posterodorsal metapleural sulcus: present as line of foveae. Paracoxal sulcus in ventral half of metapleuron: indistinguishable from sculpture to absent. Anteroventral extension of metapleuron: extending to base of mesocoxa. Metapleural epicoxal sulcus: absent or indistinguishable from sculpture; present as coarse rugae. Mesoscutal humeral sulcus: indicated by smooth furrow with a small number of cells. Median mesoscutal carina: absent. Macrosculpture of mesoscutum: rugulose; rugulose, becoming longitudinally striate posteriorly. Pattern of mesoscutal microsculpture: uniform throughout. Mesoscutal suprahumeral sulcus: comprised of cells. Length of mesoscutal suprahumeral sulcus: about half the length of anterolateral edge of mesoscutum. Parapsidal line: absent. Notaulus: absent; indicated only at posterior margin of mesoscutum. Median protuberance on anterior margin of mesoscutellum: absent. Protruberance on anterior margin of mesoscutellum directly posterior to notaulus: absent. Posterodorsal margin of axillular carina: round. Area bounded by axillar crescent: smooth. Macrosculpture of mesoscutellum: rugose throughout. Microsculpture on mesoscutellum: present throughout. Median mesoscutellar carina: absent. Setation of posterior scutellar sulcus: present. Form of metascutellum: multiple rows of cells. Metanotal trough: foveate, foveae occupying more than half of metanotal height. Metapostnotum: invaginated near lateral edge of metascutellum. Length of postmarginal vein: about twice as long as stigmal vein. Color of legs: coxae brown, femora and tibiaie yellow to pale brown, elsewhere yellow. Anteromedial portion of metasomal depression: smooth.

Metasoma. Longitudinal striae on T1 posterior to basal costae: present. Number of sublateral setae (on one side): 2; 1. Setation of laterotergite 1: absent. Longitudinal striation of T2: present in most of tergite, extending posteriorly to transverse line of setae. Setation of T2: present in a transverse line posteriorly. Setation of laterotergite 2: present.

Diagnosis.

Trissolcus comperei is similar to T. yamagishii , T. latisulcus , and T. carinifrons with which it shares a long dark radicle and coarse sculpture of the mesoscutum and mesoscutellum. Trissolcus comperei can be separated from them by the characters presented in the key: sculpture of the frons below the median ocellus, absence of a hyperoccipital carina, and a femoral depression without coarse rugae throughout. The rugae that are present in the femoral depression are located ventrally and are arched and parallel. This is a very useful diagnostic character for the species, although the rugae are fainter in smaller specimens. Trissolcus aloysiisabaudiae from East Africa shares with T. comperei this sculptural pattern of the femoral depression and is a very similar species, excluding the sculpture of the mesonotum and the presence of a robust longitudinal mesoscutellar carina. These two species should certainly be compared in a greater context of African species.

Link to distribution map.

http://hol.osu.edu/map-large.html?id=3204

Comments.

Specimens from China have bright yellow legs and non-claval flagellomeres. Specimens from Japan have darker legs and flagellomeres. The pattern of macrosculpture on the frons and the coloration of the legs and antennae are essentially identical to the pattern found in T. semistriatus : specimens from higher latitudes tend to be darker with more robust facial sculpture.

Material examined.

Holotype, female, T. comperei : CHINA: Guangdong Prov., Guangzhou (Canton), no date, reared from egg, G. Compere, USNMENT00989064 (deposited in USNM) . Holotype, female, T. itoi : JAPAN: Niigata Pref., Mt. Kanegura Yama , 19.VIII.1970, K. Yamagishi, Type No. 2220 Kyushu Univ. (deposited in KUEC) . Other material: (16 females) CHINA: 5 females, USNMENT00916347, 00916349-00916352 (BMNH). INDIA : 1 female, USNMENT00916361 (BMNH). JAPAN : 8 females, OSUC144487-144488, 542357, 542365, 542371, 542424 (CNCI); OSUC 75840-75841 (OSUC). SOUTH KOREA : 1 female, USNMENT00896147 (CNCI). UNITED ARAB EMIRATES : 1 female, USNMENT00896183 (CNCI).

Figures

Figures 28 - 29. T. comperei 28 female (USNMENT 00872396), head, mesosoma, metasoma, lateral view 29 female (USNMENT 00872397), head, mesosoma, metasoma, dorsal view. Scale bars in millimeters.

Figures 30 - 34. T. comperei 30 female holotype of T. itoi syn. n. (Type No. 2220 Kyushu Univ.) 31 female holotype (USNMENT 00989064), head, anterolateral view 32 female (USNMENT 00872399), head, anterior view 33 female (USNMENT 00916352), head, anterior view 34 female (USNMENT 00872397), mesosoma, T 1 - T 2, posterodorsal view. Scale bars in millimeters.