Embolemus brachypterus, OLMI & GUGLIELMINO & MÜLLER & CAPRADOSSI & PERKOVSKY, 2021

OLMI, MASSIMO, GUGLIELMINO, ADALGISA, MÜLLER, PATRICK, CAPRADOSSI, LEONARDO & PERKOVSKY, EVGENY E., 2021, Descriptions of the first females of Embolemus (Hymenoptera: Chrysidoidea) from Kachin (Myanmar) amber, Palaeoentomology 4 (1), pp. 44-49 : 45-46

Embolemus brachypterus sp. nov.

( Fig. 1A, B )

Holotype. Female specimen No. DAF3303 deposited in DAFS.

Etymology. The species is named brachypterus , because of the very short wings (from the Greek words brachy - (= short) and - pteron (= wing)).

Diagnosis. Brachypterous female of Embolemus ( Fig. 1A ) with fore wing short, much longer than tegula (20:3), reaching posteriorly metasomal petiole.

Locality and horizon. Kachin amber (mid- Cretaceous, lower Cenomanian , about 99 Ma) .

Description. Female. Brachypterous ( Fig. 1A ); length ca. 1.8 mm. Colour apparently brown-testaceous. Antenna geniculate, filiform, articulated on two prominent contiguous frontal processes, slightly shorter than head + mesosoma + metasoma; antennomeres in following proportions: 19:4:6:6:7:6:5:5:5:8. Head slightly pyriform (length/breadth ratio: 18:14), alutaceous, apparently bare, with dorsal side slightly convex; anterior region of dorsal side slightly tapering ( Fig. 1A ); occipital carina, ocelli, frons, temple and vertex not visible, because dorsal side of head almost completely covered by small air bubbles; ventral side of head almost completely covered by air bubbles, so that convergent longitudinal and median sutures usually present in Embolemus in region of face from clypeus to antennal toruli not visible. Palpi not visible. Mesosoma almost completely covered with air bubbles, so that morphological characters of pronotum, mesoscutum, mesoscutellum, metanotum, mesopleuron, metapleuron and metapectal-propodeal complex are not completely visible. Pronotal tubercle reaching tegula. Fore wing short, much longer than tegula (20:3), reaching posteriorly metasomal petiole. Fore wing with very reduced pterostigma, stigmal vein and costal cell; veins barely pigmented; stigmal vein 2r-rs&Rs apparently not reaching margin of fore wing. Hind wing absent. Metasomal petiole short. Tibial spurs 1/2/2.

Male. Unknown.

Figures

FIGURE 1. Embolemus brachypterus sp. nov., female holotype DAF3303. A, Dorsal view. B, Ventral view. Scale bar = 0.9 mm.