Kressleinius Domer & Burks, 2020

Domer, Tiffany C., Burks, Roger A., Krogmann, Lars & Heraty, John M., 2020, Patching up the past one fossil at a time: A new genus and species of Eulophidae from Eocene Baltic Amber (Hymenoptera, Chalcidoidea), Journal of Hymenoptera Research 79, pp. 27-42 : 27

Kressleinius Domer & Burks gen. nov.

Figs 1A-1 , 2A

Type species.

Kressleinius celans Domer & Burks, sp. nov.

Diagnosis.

This genus differs from other genera in Tetrastichinae by a combination of the following characteristics. Eye setose. Malar sulcus present and only slightly arched. Sulcus encircling ocellar triangle (Figs 1D , 5B , ocs) and extending to eyes (Figs 1D , 5B , oos). Antenna with 1 anellus, 3 funiculars, and 3 clavomeres. Prepectus large, about twice as long as acropleuron, and subtriangular. Transepimeral sulcus straight, extending dorsoventrally, meeting pleural sulcus at metacoxa. Propodeal callus with 5 setae. Postmarginal vein longer than stigmal vein, submarginal vein with 6 setae. Cercal setae subequal in length.

Description.

Head with eye setose; sulcus encircling the ocellar triangle and extending to eyes; malar sulcus present and only slightly arched; maxillary and labial palps 1 segmented; antenna with 1 anellus, 3 funiculars, and 3 clavomeres.

Mesosoma with prepectus large and subtriangular, its dorsal length twice acropleuron length; mesoscutal median sulcus absent. Notauli complete, straight, incised. Axillae advanced. Mesopleural sulcus slightly curved, meeting transepimeral sulcus only at mesocoxal insertion. Transepimeral sulcus straight, extending dorsoventrally. Propodeal callus with 5 setae. Fore wing with postmarginal vein longer than stigmal vein, submarginal vein with 6 setae.

Metasoma with cercal setae subequal in length.

Etymology.

Named after Robert Luke Kresslein, a graduate student of systematics at University of California Riverside, because he introduced T.C.D. into the world of chalcidoid wasps and taught her not to be afraid of insects.

Figures

Figure 1. A-F. Kressleinius celans gen. et sp. nov., holotype female (SMNS BB- 2847) A habitus B habitus, dorsal view, not = notaulus C body, ventral view, pl 1 = propleuron D antenna, ocs = ocellar triangle sulcus E mesosoma, lateral, pre = prepectus, tps = transepimeral sulcus F mesosoma, oblique lateral, axl = axillula, pcs = propodeal callus setae, pet = petiole.

Figure 2. A-E. A Kressleinius celans gen. et sp. nov., holotype female, fore wing venation, pmv = postmarginal vein, ams = admarginal setae, sms = submarginal vein setae B, C Peckelachertus sp.: B fore wing C habitus D Nesolynx sp. habitus E Quadrastichodella sp., habitus.

Figure 5. A-D. A Sympiesis cf. conica, head, tfs = transfacial sulcus, scs = scrobal sulcus B Crataepus marbis, head, oos = occellar ocular sulcus, ocs = occellar triangle sulcus, uos = upper ocular sulcus C Zagrammosoma americanum, mesosoma lateral, pcs = propodeal callus setae D Foersterella erdoesi, mesosoma, lateral.