Trissolcus strabus Johnson, 1984

Talamas, Elijah J., Johnson, Norman F. & Buffington, Matthew, 2015, Key to Nearctic species of Trissolcus Ashmead (Hymenoptera, Scelionidae), natural enemies of native and invasive stink bugs (Hemiptera, Pentatomidae), Journal of Hymenoptera Research 43, pp. 45-110 : 77-78

Trissolcus strabus Johnson

Figures 8 , 23 , 26 , 29 , 32 , 92-93

Trissolcus strabus Johnson, 1984: 798, 806 (original description, keyed); Sarazin 1986: 981 (type information); Johnson 1987: 286, 296 (diagnosis, keyed).

Diagnosis.

Trissolcus strabus may be distinguished from species of the Trissolcus flavipes group in the Nearctic by the ventral constriction of the orbital furrow and the relatively coarse sculpture of the mesoscutellum. Most specimens have setae present on the first laterotergite, a character found among some Trissolcus flavipes group species of the Neotropics, but not elsewhere in the Nearctic. The rugose mesoscutellum can be used as a diagnostic character in most cases, but the degree of rugosity is variable. In some specimens the mesoscutellum is almost completely smooth with faint hints of rugae along the anterior margin. In others, the rugosity is confined to the lateral portions of the sclerite. In the latter case, rugose sculpture exists where there is setation, and in specimens with an entirely rugose mesoscutellum, the entire surface is setose. This leads us to hypothesize that, at least on the mesoscutellum of T. strabus , the rugose sculpture and setation are linked. The specimens with reduced macrosculpture on the mesoscutellum also have reduced sculpture on the lateral mesoscutum (lateral of the notaulus), revealing coriaceous microsculpture.

Link to distribution map.

[http://hol.osu.edu/map-large.html?id=3313]

Associations.

Emerged from egg of / host egg of Brochymena Amyot & Serville: [ Hemiptera : Heteroptera : Pentatomoidea : Pentatomidae ]; on leaf of apple: [ Rosales : Rosaceae ]

Material examined.

Holotype, female: CANADA: ON, Hamilton, 31.VII.1980, malaise trap, M. Sanborne, CNC No. 18342 (deposited in CNCI). Paratypes: (1 female, 3 sex unrecorded) CANADA: 1 sex unrecorded, OSUC 145570 (OSUC). UNITED STATES: 1 female, 2 sex unrecorded, OSUC 17810 (BMNH); OSUC 76314 (OSUC); USNMENT00764998 (USNM). Non-type: UNITED STATES: 1 female, OSUC 248187 (OSUC). Other material: (14 females, 1 male, 13 sex unrecorded) UNITED STATES: 14 females, 1 male, 12 sex unrecorded, IRREC 1469-1470, 1472, 1521, 1587, 1595, 1787, 1789, 1797, IRREC1582, IRREC1584 (OSUC); BMSB 1202-1215, OSUC 145650, OSUC 523850 (USNM).

Figures

Figures 5 - 10. 22 5 Paratelenomus saccharalis, female (USNMENT 00896342), female, head, mesosoma, metasoma, dorsal view 6 Psix tunetanus, female (USNMENT 00989625), head and mesosoma, dorsal view 7 Psix tunetanus, female (USNMENT 00877258), head, anterior view 8 Trissolcus strabus, female (USNMENT 00954423), antennal clava, ventral view 9 Telenomus sp., female (OSUC 523925), antennal clava, ventral view 10 Paratelenomus saccharalis, female (USNMENT 00896364), head and mesosoma, anterolateral view. Scale bars in millimeters.

Figures 23 - 28. 26 23 T. strabus, female (BMSB 1203), mouthparts, anterior view 24 T. hullensis, female, (OSUC 523881), head and mesosoma, anterolateral view 25 T. japonicus, female holotype, (USNMENT 00831865), mouthparts, anterior view 26 T. strabus, female, (BMSB 1202), head mesosoma, anterolateral view 27 T. erugatus, female, (OSUC 523929), head mesosoma, anterolateral view 28 T. euschisti, female, (BMSB 1223), head mesosoma, anterolateral view. Scale bars in millimeters.

Figures 29 - 30. 27 29 T. strabus, female (BMSB 1202), head mesosoma, metasoma, dorsolateral view 30 T. basalis, female, (USNMENT 00954022), head, mesosoma, metasoma, dorsolateral view. Scale bars in millimeters.

Figures 31 - 34. 28 31 T. basalis, female (USNMENT 00954023), mesoscutellum, dorsal view 32 T. strabus, female (OSUC 523850), mesoscutellum, dorsal view 33 T. ruidus, (OSUC 76431), mesoscutellum, dorsal view 34 T. occiduus, female (OSUC 76430), mesoscutellum, dorsal view. Scale bars in millimeters.

Figures 92 - 93. 46 Trissolcus strabus, female (BMSB 1203) 92 head, mesosoma, metasoma, lateral view 93 head, mesosoma, metasoma, dorsal view. Scale bars in millimeters.