Trissolcus latisulcus (Crawford)

Talamas, Elijah J., Buffington, Matthew L. & Hoelmer, Kim, 2017, Revision of Palearctic Trissolcus Ashmead (Hymenoptera, Scelionidae), Journal of Hymenoptera Research 56, pp. 3-185 : 34-35

Trissolcus latisulcus (Crawford) Figures 98-102

Trissolcus felis Kozlov & Lê, syn. n.; http://bioguid.osu.edu/xbiod_concepts/179842; Morphbank30

Trissolcus legatarius Lê, syn. n.; http://bioguid.osu.edu/xbiod_concepts/3254; Morphbank31

Telenomus latisulcus Crawford, 1913: 244 (original description); Baltazar, 1966: 172 (cataloged, type information, distribution).

Telenomus oecleus Dodd, 1913: 163, 168 (original description, keyed, synonymized by Johnson (1991)); Johnson, 1991: 223 (junior synonym of Trissolcus latisulcus (Crawford)).

Telenomus darwinensis Dodd, 1915: 7 (original description, synonymized by Johnson (1991)); Johnson, 1991: 223 (junior synonym of Trissolcus latisulcus (Crawford)).

Telenomus erigone Dodd, 1915: 8 (original description, synonymized by Johnson (1991)).

Aphanurus banksi Gahan, 1921: 349 (original description, synonymized by Johnson (1991)); Johnson, 1991: 223 (junior synonym of Trissolcus latisulcus (Crawford)).

Microphanurus oecleus (Dodd): Kieffer, 1926: 93, 95, 111 (description, generic transfer, keyed).

Microphanurus priapus Nixon, 1938: 125, 133 (original description, keyed, synonymized by Johnson (1991)); Nixon, 1943: 139 (keyed); Risbec, 1950: 570 (keyed); Johnson, 1991: 223 (junior synonym of Trissolcus latisulcus (Crawford)).

Trissolcus priapus (Nixon): Masner, 1965: 127 (type information, generic transfer).

Microphanurus banksi (Gahan): Baltazar, 1966: 173 (cataloged, type information, distribution).

Trissolcus banksi (Gahan): Masner & Muesebeck, 1968: 71 (type information).

Trissolcus latisulcus (Crawford): Masner & Muesebeck, 1968: 73 (type information); Johnson, 1991: 213, 223 (description, synonymy, keyed); Rajmohana K. & Narendran, 2007: 102 (keyed).

Asolcus priapus (Nixon): Voegelé, 1969: 151 (keyed).

Trissolcus legatarius Lê syn. n., 1982: 223 (original description); Johnson, 1992: 631 (cataloged, type information); Lê, 2000: 312, 317 (description, keyed, type information).

Trissolcus darwinensis (Dodd): Johnson, 1988: 239 (lectotype designation, generic transfer).

Trissolcus erigone (Dodd): Johnson, 1988: 239 (type information, generic transfer).

Trissolcus oecleus (Dodd): Johnson, 1988: 240 (lectotype designation, generic transfer).

Trissolcus felis Kozlov & Lê syn. n., 2000: 312, 316, 363 (original description, keyed).

Description.

Female body length: 1.13-2.17 mm (n=21). Male body length: 1.16-1.97 mm (n=7). 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: pale brown to black. Number of basiconic sensilla on A6: 0. Number of basiconic sensilla on A7: 2. Facial striae: absent. Number of clypeal setae: 6. Microsculpture on gena directly above mandibular condyle: absent. Shape of ventral gena in lateral view: moderately bulging. 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: coarsely rugose. Preocellar pit: present. Setation of lateral frons: sparse; moderately dense. Punctation of lateral frons: absent. Sculpture directly ventral to preocellar pit: absent; microsculptured; dorsoventrally carinate. Macrosculpture of lateral frons: rugose. OOL: lateral ocellus and eye without continuous scleritic separation. Hyperoccipital carina: present only posterior to lateral ocellus. Macrosculpture of posterior vertex: rugulose. Microsculpture on posterior vertex along occipital carina: present. Anterior margin of occipital carina: coarsely crenulate.

Mesosoma. Epomial carina: present. Macrosculpture of lateral pronotum directly anterior to netrion: rugose. Netrion sulcus: incomplete. Pronotal suprahumeral sulcus in posterior half of pronotum: weakly differentiated from sculpture of dorsal pronotum. Location of pronotal suprahumeral sulcus: posterior half of pronotum. Number of episternal foveae: 3; 2; 4 or more. Course of episternal foveae ventrally: abutting postacetabular sulcus. Course of episternal foveae dorsally: extending to mesopleural pit. Subacropleural sulcus: present. Speculum: smooth; weakly transversely wrinkled; with granular microsculpture. Mesopleural pit: uncertain, simple. Mesopleural carina: complete. Sculpture of femoral depression: rugose perpendicular to long axis of femoral depression. Patch of striae at posteroventral end of femoral depression: uncertain, present, striae perpendicular to long axis of femoral depression. Setal patch at posteroventral end of femoral depression: present. Microsculpture of anteroventral mesopleuron: present throughout. Macrosculpture of anteroventral mesopleuron: coarsely rugose. Postacetabular sulcus: formed by open crenulae. Mesopleural epicoxal sulcus: formed by open crenulae. Mesofurcal pit: absent. 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: indistinguishable from sculpture to absent. 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; indicated by smooth furrow with a small number of cells. Median mesoscutal carina: absent. Macrosculpture of mesoscutum: 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: present. Notaulus: indicated only at posterior margin of mesoscutum. Median protuberance on anterior margin of mesoscutellum: present. Protruberance on anterior margin of mesoscutellum directly posterior to notaulus: absent. Area bounded by axillar crescent: smooth. Macrosculpture of mesoscutellum: rugose throughout. Microsculpture on mesoscutellum: present throughout. Median mesoscutellar carina: absent; present. 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 twice as long as stigmal vein. Color of legs: coxae dark brown to black, elsewhere yellow. Anteromedial portion of metasomal depression: smooth.

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 most of tergite, extending posteriorly to transverse line of setae. Setation of T2: present in a transverse line posteriorly. Setation of laterotergite 2: present. Striation of S2: present laterally and in anterior half of median third. Setation of S2: present throughout area not covered by laterotergite.

Diagnosis.

The coarse sculpture found throughout the femoral depression (Figure 99 ) distinguishes T. latisulcus from other Palearctic species in the genus. The femoral depression in T. comperei and T. carinifrons has parallel arched rugae (Figures 27 , 28 ) but these are limited to the ventral portion of this area. The anterior margin of the mesoscutellum often is distinctly raised, creating the appearance of an enlarged scutoscutellar sulcus (Figure 101 ), which is also useful for identifying this species.

Link to distribution map.

http://hol.osu.edu/map-large.html?id=3253

Material examined.

Holotype, female, T. latisulcus : TAIWAN: Taipei Special Muni., Taipei (Taihoku), VI-1911, T. Shiraki, USNMENT00989065 (deposited in USNM) . Paratype of T. latisulcus : TAIWAN: 1 female, USNMENT00872011 (USNM) . Holotype, female, A. banksi : PHILIPPINES: Laguna Prov., Los Banos , 15.VII.1918, C. S. Banks, USNMENT00989095 (deposited in USNM) . Holotype, female: VIETNAM: Hoa Binh Prov., Van Mai, 30.V.1982, IEBR 0040 (deposited in IEBR) . Holotype, female, T. legatarius : VIETNAM: Gia Lai Prov., forest, Ha Nung , 8.XI.1979, X. H. Lê, IEBR 0045 (deposited in IEBR) . Other material: (18 females, 9 males, 1 unsexed) CHINA: 4 females, 1 male, USNMENT00916465-00916468, 00916470 (BMNH). INDIA : 4 females, 1 male, 1 unsexed, USNMENT00916358, 00916360 (BMNH); OSUC144507 (CNCI); USNMENT00872013-00872015 (USNM). LAOS : 2 females, USNMENT00764922, 00764924 (BPBM). MALAYSIA : 4 females, 4 males, OSUC144516, 542429-542435 (CNCI). PHILIPPINES : 1 male, USNMENT00872016 (USNM). THAILAND : 4 females, 2 males, USNMENT00764926 (BPBM); OSUC144510, 144513-144514 (CNCI); OSUC523953 (OSUC); UCRC ENT 134998 (UCRC).

Comments.

We observe significant size variation in this species, suggesting that it is a generalist attacking eggs of a variety of sizes, and perhaps this contributes to the expansive distribution of Trissolcus latisulcus from eastern Australia to India.

Figures

Figures 98 - 102. T. latisulcus 98 female holotype (USNMENT 00989065), head, mesosoma, metasoma, dorsal view 99 female (OSUC 523953), head and mesosoma, ventrolateral view 100 female holotype (USNMENT 00989065), mesosoma, posterodorsal view 101 female holotype (USNMENT 00989065), dorsal mesosoma, lateral view 102 female holotype (USNMENT 00989065), head, anterior view. Scale bars in millimeters.

Figures 24 - 27. T. carinifrons, female holotype (B. M. TYPE HYM. 9.312) 24 head, mesosoma, metasoma, dorsolateral view 25 head, mesosoma, metasoma, ventrolateral view 26 head, anterior view 27 mesosoma, lateral view. Scale bars in millimeters.

Figures 28 - 29. T. comperei 28 female (USNMENT 00872396), head, mesosoma, metasoma, lateral view 29 female (USNMENT 00872397), head, mesosoma, metasoma, dorsal view. Scale bars in millimeters.