Proteroscelio nexus Talamas, 2016

Talamas, Elijah J., Johnson, Norman F., Buffington, Matthew L. & Ren, Dong, 2016, Archaeoteleia Masner in the Cretaceous and a new species of Proteroscelio Brues (Hymenoptera, Platygastroidea), Journal of Hymenoptera Research 56, pp. 241-261 : 248-250

Proteroscelio nexus Talamas sp. n. Figures 19-21 , 22 , 23

Description.

Female body length: 1.50 mm (n=1).

Head. Hyperoccipital carina: absent. Number of antennomeres: 14. Facial striae: absent. Frontal depression: absent. Malar sulcus: absent. Orbital carina: absent. Number of clavomeres: 8. Lengths of flagellomeres: approximately equal to maximal width, except A14 distinctly longer than wide. Swelling along inner orbit of compound eye: absent. Anterior margin of occipital carina: crenulate. Occipital carina: present.

Mesosoma. Pronotal suprahumeral sulcus: indicated by lines of cells. Transverse pronotal carina: present. Setation of lateral axillar region: absent. Notaulus: percurrent.

Macrosculpture of mesoscutellum: absent. Spines on mesoscutellar disc: absent. Metascutellum: differentiated from metanotal trough by line of 4 foveae directly posterior to mesoscutellum. Mesepimeral sulcus: present. Sculpture of dorsal metapleuron: transversely rugose. Posterior projection of the propodeum: present.

Metasoma. Sculpture of T2-T5: smooth posterior to foveae of antecostal suture. Horn on T1: absent. Antecostal sutures on sternites: externally indicated only on S2 as a line of costae. Antecostal sutures on tergites: indicated by cells on anterior T2-T4, T5 dubious.

Length of postmarginal vein: about equal to length of stigmal vein. Length of marginal vein: about equal to length of stigmal vein. Bristles on submarginal vein in fore wing: absent. Basal vein in fore wing: present. Bulla: present.

Diagnosis.

Proteroscelio nexus is identifiable by the combination of strongly transverse T3-T5, percurrent notauli, and the serrate form of the clavomeres.

Etymology.

This species is given the name " nexus ", derived from the Latin word for to “tie” or “bind” because this species shares characters between Proteroscelio and the previous concepts of Proterosceliopsis and Bruescelio , bringing these three genera closer together morphologically.

Link to distribution map.

http://hol.osu.edu/map-large.html?id=407637

Material examined.

Holotype, female: MYANMAR: CNU-HYM-MA-2014013 (USNMENT01197245) (deposited in CNU).

Figures

Figure 22. Proteroscelio nexus, female holotype (USNMENT 01197245) 22 habitus, dorsal. Scale bar in millimeters.

Figure 23. Proteroscelio nexus, female holotype (USNMENT 01197245) 23 habitus, ventral. Scale bar in millimeters.

Figures 19 - 21. Proteroscelio nexus, female holotype (USNMENT 01197245) 19 head and mesosoma, lateral view 20 head and mesosoma, anterolateral view 21 antenna, ventral view. Scale bars in millimeters.