Calliscelio latifrons Chen & Johnson

Chen, Hua-yan, Masner, Lubomir & Johnson, Norman F., 2017, New World species of the genus Calliscelio Ashmead (Hymenoptera, Platygastridae, Scelioninae), ZooKeys 648, pp. 1-136 : 71-74

Calliscelio latifrons Chen & Johnson sp. n. Figures 4-6, 142-147

Description.

Body length of female: 1.85-2.50 mm (n=11). Body length of male: 1.70-2.05 mm (n=10). Color of head: black throughout. Color of antennal clava (A7-A12): dark brown to black. Shape of head: subglobose. Central keel of frons: absent. Setation of upper frons: with sparse, short setae. IOS/EH: IOS slightly greater than EH. Sculpture of ventrolateral frons: granulate. Sculpture of frons below median ocellus: granulate. Sculpture of posterior vertex: granulate. Hyperoccipital carina: absent. Occipital carina medially: complete, weakly crenulate throughout. Length of OOL: greater than 0.5 × ocellar diameter. Sculpture of postgena behind outer orbit: granulate. Ocular setae: sparse, short. A4 in female: distinctly shorter than A3. A5 in female: shorter than A3, as long as wide. Shape of female A6: as long as wide. Form of male antennal flagellomeres: moniliform, A11 as long as wide. Length of A5 tyloid in male: greater than 0.5 × length of A5.

Color of mesosoma in female: black throughout; orange to pale brown. Color of mesosoma in male: dark brown throughout. Sculpture of dorsal pronotal area: granulate. Sculpture of lateral pronotal area: granulate throughout. Sculpture of netrion: rugulose. Notaulus: percurrent; abbreviated, at most reaching middle of mesoscutum. Sculpture of mesoscutum: granulate. Shape of mesoscutellum: transverse. Foveolae of scutoscutellar sulcus between notauli: absent. Sculpture of mesoscutellum: granulate. Shape of metascutellum: posterior margin straight, approximately 4.0 × wider than long. Sculpture of metascutellum in female: granulate. Sculpture of metascutellum in male: granulate. Dorsal propodeum in female: deeply excavate medially, with lateral propodeal carinae widely separated, running subparallel to accommodate T1 horn. Sculpture of dorsal propodeum in female: rugose. Sculpture of dorsal propodeum in male: rugose. Median keels on propodeum in female: absent. Mesopleural carina: present. Sculpture of mesepisternum below mesopleural depression: granulate. Sculpture of ventral metapleural area: smooth dorsally, granulate ventrally. Color of legs: orange throughout. Sculpture of hind coxa: smooth.

Color of fore wing: hyaline. Rs+M: spectral. Setae on R: long, erect, surpassing the margin of the wing. Length of R: distinctly shorter than r-rs. Length of R1: approximately as long as 2.0 × length of r-rs.

Color of metasoma in female: variably orange to pale brown. Color of metasoma in male: variably orange to pale brown; pale brown throughout. Horn on T1 in female: present as a small bulge. Sculpture of T1 horn dorsally: granulate. Sculpture of posterior margin of T1 in female: striate rugose. Sculpture of T1 in male: longitudinally rugose. Development of longitudinal striae on T2 in female: reaching posterior margin of T2. Sculpture of T3: smooth medially, longitudinally striate laterally. Shape of T6 in female: short, slightly longer than wide. Sculpture of S3: granulate.

Diagnosis.

This species is most similar to Calliscelio armila but can be easily distinguished by the granulate upper frons and the longitudinally striate T3.

Etymology.

The epithet is a compound noun in apposition referring to the wide IOS.

Link to distribution map.

[http://hol.osu.edu/map-full.html?id=367272]

Material examined.

Holotype, female: PARAGUAY: Presidente Hayes Dept., 151m, 23°48'S 60°46'W, Escalante Lagoon, 27.XI.2003, yellow pan trap, B. Garcete, OSUC 323077 (deposited in MNHNPY). Paratypes: (10 females, 10 males) ARGENTINA: 2 females, OSUC 534438- 534439 (CNCI). BRAZIL: 1 female, OSUC 534517 (CNCI). PARAGUAY: 7 females, 10 males, OSUC 322992, 363637, 534686- 534687 (MNHNPY); OSUC 150574- 150575, 276703, 322991, 322993, 323075- 323076, 323078, 363707, 363711- 363712, 434082- 434083 (OSUC).