Clystopsenella Kieffer, 1911

Lepeco, Anderson & Melo, Gabriel A. R., 2022, Synopsis of the wasp genus Clystopsenella Kieffer (Hymenoptera: Scolebythidae), Zootaxa 5134 (1), pp. 125-134 : 126

Clystopsenella Kieffer

Clystopsenella Kieffer, 1911: 204 . Type species: Clystopsenella longiventris Kieffer, 1911 , by monotypy.

Diagnosis and comments. The genus can be readily distinguished from other scolebythids by the possession of a modified region on the medial surface of the sternum V of females, consisting of an elevated area with patches of appressed setae on each side. The forewing has a relatively well-developed venation, with medial, marginal and submarginal cells closed by tubular veins. In contrast to Ycaploca Nagy , Clystopsenella lacks a strong medial elevation on the frons with carinate sides; the vein 2rs-m is inserted anteriorly on the marginal cell, and the vein 2r-rs is shorter than 1m-cu; the posterior surface of the propodeum is not rugulose medially; the first flagellomere is longer than two-thirds of the length of the second one; and the tibial spur formula is 1:2:2. Differently from Scolebythus Evans , species of Clystopsenella have the occipital carina completely absent or vestigial and restricted to its lateral portions, the malar space longer than one-half of the basal mandibular width, and the posterior ocelli distanced from each other by about 3 × anterior ocellus width or more. In addition, Clystopsenella has relatively robust legs in comparison to the other genera.