Tumidistephanus epimetheus Ge & Tan, 2025

† Tumidistephanus epimetheus Ge & Tan sp. nov.

Figs 1 View Figure 1 , 2 View Figure 2 , 3 View Figure 3

Material examined.

Holotype • ♂, Hukawng Valley , Tanai township, Myitkyina district of Kachin state, Myanmar) ( BFU).

Etymology.

The species name is derived from Epimetheus, the younger brother of Prometheus in ancient Greek mythology.

Diagnosis.

Head subcircular, with seven distinct coronal teeth; forewing with 1 - M approximately 0.5 × as long as 1 - Rs and slightly curved; veins Rs + M and 1 Cu parallel; vein 2 Rs + M nearly absent, with veins 2 - Rs and the apical abscissa of M distinctly unconnected. Metafemur markedly robust, with two prominent and five medium-sized teeth.

Description.

Holotype. • ♂, length of body about 3.25 mm (excluding antennae). Forewing length about 1.78 mm.

Head. Antenna filiform, elongate, composed of at least 19 flagellomeres; first flagellomere elongated and robust, second flagellomere comparatively short. Head broadly subcircular; frons coarsely obliquely to transversely rugose near anterior coronal tooth; vertex with seven distinct tubercles, transversely carinate posterior to the anterior coronal teeth, carinae not extending to the occipital carina. Occipital carina obsolete; temple moderately expanded posterior to compound eye.

Mesosoma. Pronotum short and robust, lacking distinct pronotal fold; neck, medial and posterior region of pronotum aligned in profile. Pronotum and mesonotum densely foveate; mesopleuron laterally with oblique transverse rugosity and ventrally with large foveae.

Wings. Forewing: vein 1 - M 0.5 × as long as 1 - Rs and slightly curved, 1.5 × as long as vein m-cu; vein 2 - Rs 3.4 × as long as vein r-rs; vein r-rs ends 0.3 × length of pterostigma; vein A incomplete, reaching only reach at 1 cu-a; vein Rs + M and 1 Cu parallel; vein 2 Rs + M almost absent, with no connection between veins 2 - Rs and the distal segment of M. Hindwing with vein Cu-a and vein M + Cu lacking.

Legs. Fore and mid legs with their femora and tibiae flattened and expanded. Metacoxa robust, spindle-shaped, ventrally with two rows of tubercles; metafemur coriaceous, extremely swollen medially, nearly oval in profile. Metafemur with two large and five medium-sized teeth (two intercalated between the large teeth, three discal to the apical large teeth); metatibia 1.2 × as long as metafemur, with basal narrow portion 0.9 × as long as apical broadened part; metatarsus with five tarsomeres; basitarsus 4.3 × as long as wide.

Metasoma. Metasoma with eight segments. First tergum and sternum not fused laterally, Tergite I rather robust, about 0.9 × as long as tergite II.

Female. Unknown.