Tumidistephanus Ge and Tan, 2023

Ge, Si-Xun, Jiang, Zhuo-Heng, Ren, Li-Li, van Achterberg, Cornelis & Tan, Jiang-Li, 2023, New insights into the phylogeny of Stephanidae (Hymenoptera: Apocrita), with a revision of the fossil species, Arthropod Systematics & amp; Phylogeny 81, pp. 819-844 : 819

Genus † Tumidistephanus Ge and Tan gen. nov.

Type species.

† Tumidistephanus prometheus Ge and Tan, sp. nov.

Etymology.

From “tumidi” (Latin for “swollen”) and the generic name, Stephanus Jurine. The name is an allusion to the robust hind femur and tibia of the type specimen. The gender of the name is masculine.

Diagnosis.

Head elliptical (Fig. 8A ). Mesosoma robust, pronotum with distinct U-shaped pronotal fold. Hind coxa rather strong with distinct lateral groove. Hind femur rather robust with its median part extremely swollen as nearly oval shaped (Fig. 8E ). Hind femur with 2 large teeth and 10 medium sized teeth (4 of them between large teeth and 6 behind the apical large teeth). Hind tibia with two spurs and with its apical half rather dilated, almost as wide as hind femur. Hind tarsus of female 5-segmented. Forewing with Rs + M and 1Cu non-parallel (Fig. 8B ); 2Rs + M rather elongated, almost as long as 1-Rs. Metasomal T1 and S1 not fused laterally. Ovipositor length almost as long as the metasoma.

Figures

Figure 8. Tumidistephanus prometheus Ge and Tan, sp. nov. Holotype ♀. A Head, frontal view. B Wings. C Tergite I and II, lateral view. D Ovipositor and ovipositor sheath. E Hind leg.