Trissolcus hyalinipennis Rajmohana & Narendran

Talamas, Elijah J., Buffington, Matthew L. & Hoelmer, Kim, 2017, Revision of Palearctic Trissolcus Ashmead (Hymenoptera, Scelionidae), Journal of Hymenoptera Research 56, pp. 3-185 : 32

Trissolcus hyalinipennis Rajmohana & Narendran Figures 77-78 , 79-83

Trissolcus indicus (Subba Rao & Chacko): Fergusson, 1983: 209 (generic transfer, type information).

Trissolcus hyalinipennis Rajmohana & Narendran: Rajmohana K. & Narendran, 2007: 101, 102 (replacement name, keyed).

Description.

Female body length: 0.95-0.98 mm (n=3). Male body length: 0.83 mm (n=1). Body color: head and mesosoma black, metasoma black to reddish brown.

Head. Color of radicle: yellow. Length of radicle: less than width of clypeus. Color of A1-A6 in female: yellow. Color of A7-A11 in female: pale brown. Number of basiconic sensilla on A6: 0. Number of basiconic sensilla on A7: 0. 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. Preocellar pit: present. Setation of lateral frons: sparse. Punctation of lateral frons: absent. Sculpture directly ventral to preocellar pit: microsculptured. Macrosculpture of lateral frons: absent. OOL: separated by less than one ocellar diameter. Hyperoccipital carina: absent. Macrosculpture of posterior vertex: absent. Microsculpture on posterior vertex along occipital carina: present. Anterior margin of occipital carina: finely crenulate to smooth.

Mesosoma. Epomial carina: absent. Macrosculpture of lateral pronotum directly anterior to netrion: faintly striate. Netrion sulcus: complete. Pronotal suprahumeral sulcus in posterior half of pronotum: undifferentiated from sculpture of dorsal pronotum. Number of episternal foveae: 0. Subacropleural sulcus: present. Speculum: smooth. Mesopleural pit: simple. 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 weakly developed and 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 small punctures. Mesofurcal pit: absent. Setation of posteroventral metapleuron: absent. Sculpture of dorsal metapleural area: smooth. Posterodorsal metapleural sulcus: present as line of foveae. Paracoxal sulcus in ventral half of metapleuron: absent. Anteroventral extension of metapleuron: not extending to base of mesocoxa. Metapleural epicoxal sulcus: absent or indistinguishable from sculpture. Mesoscutal humeral sulcus: present as a simple furrow. Median mesoscutal carina: absent. Macrosculpture of mesoscutum: absent. 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: present. Notaulus: absent. Median protuberance on anterior margin of mesoscutellum: absent. Shape of dorsal margin of anterior lobe of axillar crescent: acute. Sculpture of anterior lobe of axillar crescent: dorsoventrally strigose. Posterodorsal margin of axillular carina: pointed. Area bounded by axillar crescent: smooth. Macrosculpture of mesoscutellum: absent. Microsculpture on mesoscutellum: present throughout. Median mesoscutellar carina: absent. Setation of posterior scutellar sulcus: absent.

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 twice as long as stigmal vein. Color of legs: coxae dark brown to black, 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): 1. Setation of laterotergite 1: absent. Longitudinal striation of T2: faintly present anteriorly. Setation of T2: present in a transverse line posteriorly. Setation of laterotergite 2: present. Setation of S2: present only in medial third.

Diagnosis.

Trissolcus hyalinipennis is most similar to T. oobius , with which it shares a 4-merous clava. They may be separated by wing venation: the postmarginal vein is shorter than the stigmal vein in T. oobius and approximately twice as along as the stigmal vein in T. hyalinipennis (compare Figure 79 to Figures 124-127 ). Apart from this character, we found no other means of separating these two species.

Link to distribution map.

http://hol.osu.edu/map-large.html?id=227946

Material examined.

Other material: (6 females, 3 males) INDIA: 1 male, UCRC ENT 296999 (UCRC). PAKISTAN : 5 females, USNMENT01109060-01109064 (USNM). PALESTINE : 1 female, USNMENT00916601 (BMNH). SPAIN : 1 male, USNMENT00896154 (CNCI). TURKEY : 1 male, USNMENT00896194 (CNCI).

Comments.

Our determination of these specimens is based on their consistency with the description of Subba Rao and Chacko (1961). Many of our specimens were reared from the eggs of Bagrada hilaris (= Bagrada cruciferarum ) (subsequently reared on eggs of Podisus maculiventris Say), which is also consistent with the biology presented in the original description. The holotype of this species is now considered to be lost (Rajmohana Keloth, personal communication), and thus designation of a neotype is needed to fully stabilize the name. We refrain from doing so because the reared specimens that we have on hand were collected in Pakistan, sufficiently far from New Delhi to not be considered from the same area, and the specimen from New Delhi that we do have is a male.

Figures

Figures 77 - 78. T. hyalinipennis 77 female (USNMENT 01109062), head, mesosoma, metasoma, dorsal view 78 female (USNMENT 01109060), head, mesosoma, metasoma, lateral view. Scale bars in millimeters.

Figures 79 - 83. T. hyalinipennis 79 female (USNMENT 01109060), venation of fore wing, dorsal view 80 female (USNMENT 01109061), antennal clava, ventral view 81 female (USNMENT 01109061), head and mesosoma, dorsolateral view 82 female (USNMENT 01109060) head and antenna, anterior view 83 female (USNMENT 01109060) head, mesosoma, metasoma, dorsolateral view. Scale bars in millimeters.

Figures 120 - 127. T. oobius 120 female paratype of T. niceppe (USNMENT 00916279), head and mesosoma, ventrolateral view 121 female paratype of T. oobius (USNMENT 00916617), head, mesosoma, T 1 - T 2, dorsolateral view 122 female paratype of T. merope (USNMENT 00916614), head and anterior mesosoma, lateral view 123 female paratype of T. dirrhope (USNMENT 00916275), head, anterior view 124 female paratype of T. merope (USNMENT 00916614), venation of fore wing, dorsal view 125 female paratype of T. dirrhope (USNMENT 00916275), venation of fore wing, dorsal view 126 female paratype of T. niceppe (USNMENT 00916279), venation of fore wing, dorsal view 127 female paratype of T. oobius (USNMENT 00916619), venation of fore wing, dorsal view. Scale bars in millimeters.