Hadesmesitius Barbosa, 2022

Barbosa, Diego N., Hermes, Marcel Gustavo & Lepeco, Anderson, 2022, Phylogeny of Mesitiinae (Hymenoptera: Bethylidae): assessing their classification, character evolution and diversification, Arthropod Systematics & amp; Phylogeny 80, pp. 603-625 : 603

Hadesmesitius Barbosa gen. nov.

Type species.

Anaylax simplicitus Barbosa & Azevedo, 2011 by original designation.

Diagnosis.

The length of first flagellomere shorter than pedicel (#18:2), ventral half of occipital carina absent (#30:0), mesoscutellum touching metapectal-propodeal disc (#47:1), propodeal spiracle circular (#61:1), distance between distal hamuli and first hamuli more separated than others (#82:1), ventral arm of paramere of genitalia S-shaped (#104:1) are autapomorphies of Hadesmesitius . This genus has similarity with Anaylax and Clytrovorus , because they have the head, dorsal pronotal area and mesoscutum coriaceous, the median pronotal line and median mesonotal sulcus absent, and the posterior propodeal projection absent. Other characteristics also help to distinguish Hadesmesitius from Anaylax and Clytrovorus , as follows: hypopygium longer than wide and with filamentary branches, similar to Pilomesitius , Pycnomesitius , Sulcomesitius , and Zimankos ; hind wing with distance between distal hamuli and first hamuli more separated than others, similar to Zimankos ; and the ventral arm of paramere of genitalia S-shaped is shared with Gerbekas and Heterocoelia . Based on comparisons with the other Mesitiinae genera and mainly on its monophyly, we introduce Hadesmesitius as a new genus for Mesitiinae .

Description.

Wings subhyaline. Head: As long as wide; malar space shorter than VOL, parallel; clypeus with median lobe quadrate, median clypeal carina arched; antenna with pubescence sparse and short; pedicel fusiform, first flagellomere shorter than pedicel, flagellomeres long; eye small; frons not foveolate, with frontal carina; ocelli small; anterior ocellus posterior to supra-ocular line; dorsal half of occipital carina low, ventral half of occipital carina absent. Pronotum: Dorsal pronotal area shorter than wide, coriaceous, with humeral angle rounded, side slightly incurved, anterior margin outcurved, posterior margin straight, median pronotal line absent; mesoscutum coriaceous, median mesonotal sulcus absent, notaulus narrow; mesoscutellum touching metapectal-propodeal disc; metapectal-propodeal disc as long as its half width, metapostnotal median carina incomplete, without longitudinal ridge between metapostnotal median carina and metapostnotal-propodeal carina, posterior propodeal projection absent; spiracle shape circular; propodeal declivity coriaceous and ecarinate; lateral surface of metapectal-propodeal complex coriaceous, without carinae. Wings: Hind wing with first hamuli more separated than others. Metasoma: Dorsal and ventral region of terga III-VI polished, with sparse setae at posterior margin; hypopygium bilobate, spiculum as long as half of hypopygium, with filamentary and long branch, longer than wide, lateral margin parallel, corner angulate. Genitalia: With harpe dorsal arm shorter than ventral arm, ‘S’ -shaped, and with basal margin narrow, ventral arm of harpe wide apically; cuspis with distinct arms; aedeagus slender, with apex posterior to harpe apex, apical margin rounded, lateral of margin of basal portion slightly outcurved.

Etymology.

The name Hadesmesitius , masculine, is a combination of the “Hades”, the Greek mythology god that has a forked weapon with the same shape of the hypopygium in this genus, which is diagnostic for the group, and the name " Mesitius ", the type genus of Mesitiinae .

Distribution.

United Arab Emirates.

Species included.

Only the type species Anaylax simplicitus Barbosa & Azevedo, 2011 in its current combination Hadesmesitius simplicitus (Barbosa & Azevedo, 2011) comb. nov.