Trissolcus corai Talamas, 2017

Talamas, Elijah J., Buffington, Matthew L. & Hoelmer, Kim, 2017, Revision of Palearctic Trissolcus Ashmead (Hymenoptera, Scelionidae), Journal of Hymenoptera Research 56, pp. 3-185 : 14-18

Trissolcus corai Talamas sp. n. Figures 35-36 , 37-39

Description.

Female body length: 1.11-1.41 mm (n=20). Male body length: 1.10-1.23 mm (n=2). Body color: head, mesosoma, and metasoma black.

Head. Color of radicle: yellow. Length of radicle: less than width of clypeus. Color of A1-A6 in female: yellow; yellow, becoming brown distally. Color of A7-A11 in female: brown. Number of basiconic sensilla on A6: 0. Number of basiconic sensilla on A7: 2. Facial striae: present as short grooves. Number of clypeal setae: 4. Micros culpture on gena directly above mandibular condyle: present. 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; faintly rugulose. Orbital furrow: expanding in size ventrally, strongly so at intersection with malar sulcus. Macrosculpture of frons between antennal scrobe and anterior ocellus: absent; weakly transversely strigose. Preocellar pit: present. Setation of lateral frons: sparse. Punctation of lateral frons: moderately dense. Sculpture directly ventral to preocellar pit: absent; microsculptured; weakly transversely striate. Macrosculpture of lateral frons: absent. OOL: separated by less than one ocellar diameter. Hyperoccipital carina: complete. Macrosculpture of posterior vertex: absent. Microsculpture on posterior vertex along occipital carina: present; absent medially, present laterally. Anterior margin of occipital carina: coarsely crenulate.

Mesosoma. Epomial carina: present. Macrosculpture of lateral pronotum directly anterior to netrion: striate, striae formed by elongation of cells of netrion sulcus. Netrion sulcus: complete. Pronotal suprahumeral sulcus in posterior half of pronotum: clearly indicated by cells. 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. Speculum: transversely strigose. 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: 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 large cells. Setation of posteroventral metapleuron: absent. Sculpture of dorsal metapleural area: smooth in anterodorsal corner, coarsely rugose posteriorly; rugose. Posterodorsal metapleural sulcus: poorly defined to absent. Paracoxal sulcus in ventral half of metapleuron: indistinguishable from sculpture to absent; indicated by a line of elongate cells. Anteroventral extension of metapleuron: 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 posteriorly; 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: extending at least 1/3 length of mesoscutum. Median protuberance on anterior margin of mesoscutellum: absent. 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: dorsoventrally strigose. Area bounded by axillar crescent: striate. Macrosculpture of mesoscutellum: absent. Microsculpture on mesoscutellum: present throughout. Median mesoscutellar carina: absent. Setation of posterior scutellar sulcus: present. Form of metascutellum: coarsely rugose. 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. 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 anterior two-thirds of tergite. Setation of T2: present in a transverse line posteriorly. Setation of laterotergite 2: present. Posteriorly directed setae on medial S1: present. Striation of S2: present in anterior half of sternite not covered by laterotergites. Setation of S2: sparsely present throughout area not covered by laterotergite.

Diagnosis.

Trissolcus corai belongs to the cluster of species of the flavipes group with 4 clypeal setae, which includes T. japonicus , T. kozlovi , and T. plautiae . It can be separated from all of these by the transverse sculpture on the frons and by the distinctly smaller size of the lateral clypeal setae relative to the median pair. The number of clypeal setae is the best character for separating T. corai from T. vindicius , which can be very similar, particularly because the rugae on the frons of some T. corai may be weakly developed. In most T. corai , the mesoscutum between the notauli has longitudinal rugae, which will separate T. corai from T. japonicus , T. kozlovi , T. plautiae , and T. vindicius .

Etymology.

This species is named for Joe Cora, former database manager at The Ohio State University, for his multitudinous contributions to the development of cybertaxonomic tools and the bioinformatics of Platygastroidea.

Associations.

emerged from egg of Cappaea tibialis Hsiano & Cheng: [ Hemiptera: Heteroptera: Pentatomoidea: Pentatomidae ]

Link to distribution map.

http://hol.osu.edu/map-large.html?id=350942

Material examined.

Holotype, female: CHINA: Beijing Prov., Haidian, Baiwangshan Mountain N40 º02’ 05.31 E116 º15’ 21.86, 15.XII.2015, reared from egg, T. Haye, USNMENT01223979 (deposited in USNM) . Paratypes: (94 females) CHINA : 8 females, USNMENT01223973-01223974, 01223977-01223978 ( OSUC); USNMENT01223965, 01223970-01223972 ( USNM). JAPAN : 79 females, OSUC144392-144408, 144411-144435, 144437, 144439-144444, 144446-144454, 144456-144467, 542356, 542366-542367, 542369-542370, 542372, 542379, 542381, USNMENT00896310 ( CNCI). SOUTH KOREA : 5 females, USNMENT00896027-00896028, 00896030, 00896037, 00896047 ( CNCI). TAIWAN : 2 females, OSUC 63888, 76838 ( OSUC). Other material: (2 females, 4 males) CHINA: 2 females, 2 males, USNMENT01223664, 01223966, 01223969, 01223976 ( USNM). JAPAN : 2 males, OSUC144409-144410 ( CNCI).

Figures

Figures 35 - 36. Trissolcus corai female paratype (USNMENT 00977542) 35 head, mesosoma, metasoma, lateral view 36 head, mesosoma, metasoma, dorsal view. Scale bars in millimeters.

Figures 37 - 39. Trissolcus corai 37 female paratype (OSUC 542370), head, mesosoma, metasoma, ventrolateral view 38 female paratype (USNMENT 00896028), head, mesosoma, metasoma, ventrolateral view 39 female paratype (USNMENT 01223664), ventral head, anterior view. Scale bars in millimeters.