Trissolcus trophonius (Nixon)

Talamas, Elijah J., Buffington, Matthew L. & Hoelmer, Kim, 2017, Revision of Palearctic Trissolcus Ashmead (Hymenoptera, Scelionidae), Journal of Hymenoptera Research 56, pp. 3-185 : 63-64

Trissolcus trophonius (Nixon) Figures 194-195 , 196-198

Microphanurus trophonius Nixon, 1938: 123, 127 (original description, keyed); Nixon, 1943: 136, 140 (diagnosis, keyed); Risbec, 1950: 568 (keyed).

Trissolcus trophonius (Nixon): Masner, 1965: 128 (type information, generic transfer).

Description.

Female body length: 0.94-1.08 mm (n=2). Body color: head, mesosoma, and metasoma black.

Head. Color of radicle: yellow. Length of radicle: equal to or greater than width of clypeus; less than width of clypeus. Color of A1-A6 in female: yellow, becoming brown distally; basal A1 and distal A2 yellow, elsewhere pale brown. Color of A7-A11 in female: brown. Number of basiconic sensilla on A6: 0. Number of basiconic sensilla on A7: 2. Facial striae: absent. Number of clypeal setae: 4. Microsculpture on gena directly above mandibular condyle: absent. Shape of ventral gena in lateral view: narrow. Genal carina: absent. Malar striae: absent. Sculpture of malar sulcus: smooth. Orbital furrow: expanding in size ventrally, strongly so at intersection with malar sulcus. Macrosculpture of frons between antennal scrobe and anterior ocellus: absent. Preocellar pit: present. Setation of lateral frons: sparse. Punctation of lateral frons: absent. Sculpture directly ventral to preocellar pit: dorsoventrally fluted. Macrosculpture of lateral frons: weakly horizontally striate, striae of antennal scrobe extending to lateral frons. OOL: separated by less than one ocellar diameter. Hyperoccipital carina: complete. Macrosculpture of posterior vertex: absent. Microsculpture on posterior vertex along occipital carina: absent. Anterior margin of occipital carina: coarsely crenulate.

Mesosoma: Epomial carina: present. Macrosculpture of lateral pronotum directly anterior to netrion: finely rugulose. Netrion sulcus: complete. Pronotal suprahumeral sulcus in posterior half of pronotum: clearly indicated by cells. Location of pronotal suprahumeral sulcus: uncertain, percurrent. Number of episternal foveae: 4 or more. Course of episternal foveae ventrally: abutting postacetabular sulcus. Course of episternal foveae dorsally: extending to mesopleural pit. Subacropleural sulcus: present. Mesopleural pit: extending ventrally into dorsoventral furrow parallel to mesopleural carina. Mesopleural carina: well defined anteriorly, poorly defined to absent posteriorly. Sculpture of femoral depression: smooth. 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: present. Microsculpture of anteroventral mesopleuron: present dorsally. Macrosculpture of anteroventral mesopleuron: absent. Postacetabular sulcus: formed by large cells. Mesopleural epicoxal sulcus: formed by open crenulae. Setation of posteroventral metapleuron: absent. Sculpture of dorsal metapleural area: rugose. Posterodorsal metapleural sulcus: poorly defined to absent. Paracoxal sulcus in ventral half of metapleuron: indicated by a line of elongate cells. Anteroventral extension of metapleuron: not extending to base of mesocoxa. Metapleural epicoxal sulcus: present as coarse rugae. Mesoscutal humeral sulcus: indicated by a line of cells. Median mesoscutal carina: absent. Macrosculpture of mesoscutum: absent; weakly rugulose anteriorly, otherwise absent. Pattern of mesoscutal microsculpture: effaced posteriorly. Mesoscutal suprahumeral sulcus: comprised of cells. Length of mesoscutal suprahumeral sulcus: about half the length of anterolateral edge of mesoscutum. Parapsidal line: absent. Notaulus: extending at least 1/3 length of mesoscutum. Median protuberance on anterior margin of mesoscutellum: present. Protruberance on anterior margin of mesoscutellum directly posterior to notaulus: present. Shape of dorsal margin of anterior lobe of axillar crescent: round. Sculpture of anterior lobe of axillar crescent: absent. Area bounded by axillar crescent: striate. Macrosculpture of mesoscutellum: absent. Microsculpture on mesoscutellum: absent. Setation of posterior scutellar sulcus: present. Form of metascutellum: single row 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 1.5 times as long as stigmal vein. Color of legs: coxae brown, legs elsewhere yellow; coxae and femora brown, elsewhere yellow. Anteromedial portion of metasomal depression: punctate or crenulate.

Metasoma. Longitudinal striae on T1 posterior to basal costae: present. Number of sublateral setae (on one side): 0. Setation of laterotergite 1: absent. Longitudinal striation of T2: present in anteromedial portion of the tergite. Setation of T2: sparsely present in posterolateral corner. Setation of laterotergite 2: present. Striation of S2: present in anterior half of sternite not covered by laterotergites. Setation of S2: present posteromedially.

Diagnosis.

The presence of 4 clypeal setae and posteriorly effaced sculpture of the mesoscutum are shared with T. plautiae , T. japonicus , and T. kozlovi . It may separated from them by the dorsoventral groove that extends from the median ocellus to the antennal scrobe, the effaced sculpture lateral to this groove, and the striation on T2 that is limited to the anteromedial portion of the tergite.

Lectotype designation.

We here designate specimen B.M. TYPE HYM. 9.315 (deposited in BMNH) to be the lectotype of this species.

Link to distribution map.

http://hol.osu.edu/map-large.html?id=3323

Material examined.

Lectotype, female, M. trophonius : INDONESIA: Sumatera Utara Prov., Asahan Regency, Negaga Estate , 50-60m, 10.XII.1934, reared, Schneider, B.M. TYPE HYM. 9.315 (deposited in BMNH) . Other material: THAILAND: 1 female, UCRC ENT 297005 (UCRC) .

Figures

Figures 194 - 195. Trissolcus trophonius, female holotype (B. M. TYPE HYM. 9.315) 194 head, mesosoma, metasoma, lateral view 195 head, mesosoma, metasoma, dorsal view. Scale bars in millimeters.

Figures 196 - 198. Trissolcus trophonius, female holotype (B. M. TYPE HYM. 9.315) 196 head, anterior view 197 head and mesosoma, anterolateral view 198 head and mesosoma, dorsolateral view. Scale bars in millimeters.