Trissolcus euschisti (Ashmead)

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 : 68-70

Trissolcus euschisti (Ashmead)

Figures 12 , 20 , 28 , 42-43 , 62-65

Telenomus euschristus Ashmead, 1888: ii (original description, spelling error).

Trissolcus euschisti (Ashmead): Ashmead 1893: 161, 162 (emendation, description, generic transfer, keyed); Harrington 1900: 183 (variation); Brues 1916: 549, 550 (description, keyed); Kieffer 1926: 127, 129 (description, keyed); Johnson 1984: 799, 801 (lectotype designation, synonymy, description, keyed); Johnson 1987: 289, 301 (diagnosis, keyed).

Trissolcus podisi Ashmead, 1893: 161, 162 (original description, keyed, synonymized by Johnson (1984)); Brues 1916: 550 (description, keyed); Kieffer 1926: 127, 129 (description, keyed); Masner and Muesebeck 1968: 73 (lectotype designation); Johnson 1984: 801 (junior synonym of Trissolcus euschisti (Ashmead)).

Trissolcus rufitarsis Kieffer, 1906: 262 (original description, synonymized by Johnson (1984)); Kieffer 1926: 127, 128 (description, keyed); Hoebeke 1980: 27 (type information); Johnson 1984: 801, 803 (lectotype designation, junior synonym of Trissolcus euschisti (Ashmead)); Zuparko and Hamai 1994: 314 (type information).

Trissolcus euchisti (Ashmead): Brues 1908: 11 (emendation); Golin, Loiácono, Margaría and Aquino 2011: 618 (host association).

Diagnosis.

Trissolcus euschisti may be distinguished from the similar T. brochymenae by the smooth or shallowly impressed sculpture on the ventral portion of the mesopleuron anterior to the mesopleural carina. The smaller specimens of T. euschisti are often quite distinct from the larger ones in the following characters: number of lateral setae on T1, extent of fine wrinkles on T2, extent of rugae on S2, extent of S1 setation, number of setae on the mesopleuron above the mesocoxa, sculpture of the upper portion of the frons, extent of transverse striae within the antennal scrobe, and the presence of a shallow groove below the anterior ocellus.

The separation of T. euschisti and T. brochymenae may be difficult with specimens that exhibit an intermediate state of faint rugosity on the anteroventral mesopleuron. These specimens are not common in our experience and the situation reflects the need for molecular data to further test the hypotheses of species delimitation presented here and in the revisions of Nearctic Trissolcus by Johnson (1984, 1985a, b).

Link to distribution map.

[http://hol.osu.edu/map-large.html?id=3232]

Associations.

Collected on Acer saccharum Marshall: [ Sapindales : Aceraceae ]; emerged from egg of Acrosternum hilare (Say): [ Hemiptera : Heteroptera : Pentatomoidea : Pentatomidae ]; on leaf of Catalpa Scop.: [ Scrophulariales : Bignoniaceae ]; emerged from egg of Edessa meditabunda (Fabricius): [ Hemiptera : Heteroptera : Pentatomoidea : Pentatomidae ]; emerged from egg of / host egg of Euschistus Dallas: [ Hemiptera : Heteroptera : Pentatomoidea : Pentatomidae ]; emerged from egg of Euschistus conspersus Uhler: [ Hemiptera : Heteroptera : Pentatomoidea : Pentatomidae ]; emerged from egg of Pentatomidae : [ Hemiptera : Heteroptera : Pentatomoidea : Pentatomidae ]; emerged from egg of / host egg of Pentatomidae : [ Hemiptera : Heteroptera : Pentatomoidea : Pentatomidae ]; unspecified association Pentatomidae : [ Hemiptera : Heteroptera : Pentatomoidea : Pentatomidae ]; emerged from egg of Podisus maculiventris (Say): [ Hemiptera : Heteroptera : Pentatomoidea : Pentatomidae ]; emerged from sentinel egg mass of Podisus maculiventris (Say): [ Hemiptera : Heteroptera : Pentatomoidea : Pentatomidae ]; parasite of Podisus maculiventris (Say): [ Hemiptera : Heteroptera : Pentatomoidea : Pentatomidae ]; unspecified association Podisus maculiventris (Say): [ Hemiptera : Heteroptera : Pentatomoidea : Pentatomidae ]; emerged from egg of Podisus serieventris Uhler: [ Hemiptera : Heteroptera : Pentatomoidea : Pentatomidae ]; emerged from egg of Podisus spinosus (Dallas): [ Hemiptera : Heteroptera : Pentatomoidea : Pentatomidae ]; collected on Quercus agrifolia Nee.: [ Fagales : Fagaceae ]; emerged from sentinel egg mass of Thyanta accerra custator (Fabricius): [ Hemiptera : Heteroptera : Pentatomoidea : Pentatomidae ]; collected on alder: [ Fagales : Betulaceae ]; on young maple: [ Sapindales : Aceraceae ]; collected on pecan: [ Juglandales : Juglandaceae ]; collected on red pine: [ Pinales : Pinaceae ]; collected on wax myrtle: [ Myricales : Myricaceae ]

Material examined.

Lectotype, female, T. euschristus : UNITED STATES: Riley Co., VI, Marlatt, OSUC 256926 (deposited in OSUC). Lectotype, female, T. rufitarsis : UNITED STATES: Ormsby Co., VII, Baker, Cornell U. No. 388.1 (deposited in CUIC). Lectotype, female, T. rufitarsis : UNITED STATES: Ormsby Co., VII, Baker, USNMENT00979614 (deposited in CUIC). Lectotype, female, T. podisi : UNITED STATES: PA, Philadelphia Co., Philadelphia, no date, Cresson, USNMENT00989033 (deposited in USNM). Paratypes: UNITED STATES: 2 sex unrecorded, OSUC 398789, 398823 (CNCI). Other material: (71 females, 10 males, 243 sex unrecorded) BRAZIL: 3 sex unrecorded, OSUC 75746-75748 (OSUC). CANADA: 1 female, 1 male, 32 sex unrecorded, OSUC 145426-145427, 398793-398798, 398800-398803, 398805-398817, 398836-398840, 398844-398847 (CNCI). FRENCH GUIANA: 1 sex unrecorded, OSUC 248138 (OSUC). MEXICO: 1 sex unrecorded, OSUC 75745 (OSUC). NORTH AMERICA: 1 female, OSUC 398799 (CNCI). UNITED STATES: 69 females, 9 males, 201 sex unrecorded, OSUC 17808 (BMNH); OSUC 145178, 145409-145410, 398790-398792, 398818-398822, 398824-398835, 398841-398843 (CNCI); USNMENT00979600, USNMENT00979603, USNMENT00979605 (CUIC); OSUC 436702 (LACM); OSUC 523870-523871, 523874 (MEMU); OSUC 145411-145418, 145421-145425 (MSWC); IRREC 1794, IRREC834, OSUC 143837, OSUC 143838-OSUC 143850, OSUC 145177, OSUC 145561, OSUC 157488-OSUC 157493, OSUC 181546, OSUC 248134, OSUC 248139, OSUC 334007, OSUC 402728, OSUC 404912, OSUC 409995, OSUC 413680, OSUC 413681, OSUC 413682-OSUC 413699, OSUC 413729-OSUC 413748, OSUC 413940, OSUC 523862, OSUC 523863, OSUC 523866-OSUC 523868, OSUC 523883-OSUC 523903, OSUC 523924, OSUC 523928, OSUC 523934, OSUC 523939, OSUC 523941, OSUC 542439, OSUC 542441, OSUC 542443, OSUC 70463, OSUC 75678-OSUC 77202, OSUC 79805 (OSUC); OSUC 145419-145420 (UCRC); BMSB 1218, 1220-1230, 1232, OSUC 523851, USNMENT00872096-USNMENT00872102, USNMENT00989171, USNMENT00989172, USNMENT00989174-USNMENT00989179 (USNM).

Figures

Figures 11 - 12. 23 11 Gryon obesum, female paratype (USNMENT 00989078), head, mesosoma, metasoma, anterolateral view 1 2 Trissolcus euschisti, female (OSUC 404912), head, mesosoma, metasoma, ventrolateral view. Scale bars in millimeters.

Figures 17 - 22. 25 17 T. japonicus, female (USNMENT 00675989), mesosoma, lateral view 18 T. occiduus, female (USNMENT 00764995), mesosoma, lateral view 19 Trissolcus cultratus, female (USNMENT 00764850), head and mesosoma, dorsolateral view 20 T. euschisti, female (OSUC 523871), mesosoma, lateral view 21 T. japonicus, female (USNMENT 00675989), mesosoma, posterolateral view 22 T. hullensis, female (OSUC 523881), mesosoma, dorsolateral 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 42 - 45. 31 42 T. euschisti female (OSUC 523902), mesosoma, ventrolateral view 43 T. euschisti female (OSUC 404912), mesosoma, ventrolateral view 44 T. brochymenae (BMSB 1216), mesosoma, anterolateral view 45 T. brochymenae (USNMENT 00896401), mesosoma, ventrolateral view. Scale bars in millimeters.

Figures 62 - 65. 37 Trissolcus euschisti 62 female (USNMENT 00872098), head, mesosoma, metasoma, lateral view. 63 female (USNMENT 00872098), head, mesosoma, metasoma, dorsal view 64 female (OSUC 334007), head and mesosoma, dorsolateral view 65 female (USNMENT 00872098), head, anterior view. Scale bars in millimeters.