Thrasorus rieki Paretas-Martinez & Pujade-Villar, 2011

Paretas-Martinez, J., Restrepo-Ortiz, C., Buffington, M. & Pujade-Villar, J., 2011, Systematics of Australian Thrasorinae (Hymenoptera, Cynipoidea, Figitidae) with descriptions of Mikeiinae, new subfamily, two new genera, and three new species, ZooKeys 108, pp. 21-48 : 33-36

Thrasorus rieki Paretas-Martinez & Pujade-Villar sp. n. Fig. 4B

Diagnosis.

Differs from other species of Thrasorus by having small scutellar foveae not clearly defined in posterior margin ( Fig. 4B ); other species of Thrasorus have scutellar foveae clearly delimited in the entire circumference ( Fig. 4D ). Further differs from other Thrasorus species by having a well-defined median mesoscutal impression (arrow, Fig. 4B ); in other Thrasorus , the impression is not present, or at most, a very small incision can be seen ( Fig. 4D ).

Description.

Length. Female: 3.0-3.2 mm; males: 3.2-3.3 mm.

Coloration. Head and mesosoma black, antennae brown, and metasoma pale brown. Legs pale yellow except coxae, brown.

Head. ( Fig. 4A ) Frons and face with abundant setae and piliferous punctures; space between clypeus and compound eye with carinae. Malar furrow conspicuous, coriaceous and striate. Occiput smooth; genae with strong striae. Vertex in dorsal view with small piliferous punctures. Circumtorular impression present.

Antenna. Female. ( Fig. 4G ) 11 flagellomeres, antennal formula: 6(3): 2(2): 5(2): 4(2): 4(3): 4(3): 4(3): 4(3): 4(3): 3(3): 3(3): 3(3): 5(4). Placoid sensillae from F4 to terminal segment. Male. ( Fig. 4C ) 12 flagellomeres, antennal formula: 7(3): 3(2): 5(2): 4(3): 4(3): 4(3): 4(3): 4(3): 4(3): 4(3): 4(3): 4(3): 4(3): 5(3). Placoid sensillae starting from F1.

Mesosoma ( Fig. 4B, E ). Lateral margins of pronotal plate reaching the scutum, forming a small plate conspicuous but not projected, concave dorsomedially, with piliferous punctures. Mesoscutum smooth and shiny, with piliferous punctures. Notauli complete, very narrow anteriorly and much wider posteriorly. Parascutal sulcus wide only in basal half. Lateral basal impressions weak. Antero-admedian lines very weak. Median mesoscutal impression well defined but not clearly delimited anteriorly. Scutellum smooth on anterior falf and centre, rugose posteriorly; scutellar foveae small subtriangular, not clearly delimited posteriorly; interfoveal carina absent. Mesopleural furrow present but not conspicuous. Propodeal carinae present. Pronotum, mesoscutum, scutellum, mesopleural triangle and metapleura not very pubescent, only some sparse setae.

Forewing. Short setae present on wing surface and along margins. Radial cell closed, 1.9 times longer than wide; R2 almost straight; areolet absent.

Legs. Metatibia with two spurs, sub-equal in length, not exceeding one-half length of tarsomere 1.

Metasoma. ( Fig. 4F ) Petiole short. Base of T3 with an almost complete hairy ring. Tergite 3 smaller than T4; T4 four large, covering almost entire metasomal surface; remaining terga short, telescoped within T4; entire metasoma shiny and smooth.

Material examined.

HOLOTYPE ♀ (ANIC; marked by a red spot, on a pinned card with six other specimens of the same taxon) with the following labels: "Out of large galls on mullee acacia On 18-1-16" (handwritten below the label with the insects), "Thrasorus berlesei (Grlt) Riek det" (white label, handwritten), "sp 7 (berlesei) det ML Buffington 2006" (white label), "Holotype Thrasorus rieki P-M & P-V det-2009" (red label). PARATYPES: 4 ♂ and 1 ♀ (on the same pinned card as the holotype) with the same data as the holotype, "Paratype Thrasorus rieki P-M & P-V det-2009" (red label); 1 ♂ and 5 ♀ (ANIC) (on a pinned card together with 6 Chalcidoidea specimens) with the following labels: "Out of Acacia galls ???? 19.1.16 QLD" (handwritten below the label with the insects), "AUST. NAT. INS. COLL." (green label), "Paratype Thrasorus rieki P-M & P-V det-2009" (red label); 1 ♀ (QM) with the following labels: "Amblynotus berlesei ♀ Girault types" (white label handwritten), " HOLOTYPE" (pink label), "Thrasorus berlesei (Gir) EF Riek det 1953" (white label handwritten), "QM reg. No. T99347" (yellow label), "Paratype Thrasorus rieki P-M & P-V det-2009" (red label).

Biology.

Unknown host on Acacia galls (based on label data).

Distribution.

Australia, Queensland.

Etymology.

Named after E.F. Riek, who worked before us on Australian Cynipoidea .

Taxonomic comments.

In the QM, there is one specimen labelled as ' Amblynotus berlesei ' by Girault. In ANIC, there are six specimens on one large card with a determination label placed by Riek, stating that taxon is ' Thrasorus berlesei (Grlt)'. But as Buffington (2008) pointed out, this species was never published by Girault nor Riek. As this name is a nomen nudum after Buffington (2008), we described it as a new species. In ANIC, there is another large card that has six specimens of Thrasorus rieki , sp. n., mixed with Chalcidoidea specimens.

Figures

Figure 4. Characters of Thrasorus (A-G) and Scutimica (H) A head, anterior view B mesosoma, dorsal view, Thrasorus rieki C antenna, male, medial view D mesosoma, dorsal view, Thrasorus schmidtae E head and mesosoma, lateral view F metasoma, lateral view G antenna, female, medial view H mesosoma, dorsal view, Scutimica transcarinata.