Ptyngidricerus van der Weele, 1909

Hassan, Muhammad Asghar & Liu, Xingyue, 2021, Taxonomic notes on owlflies from Pakistan (Neuroptera: Myrmeleontidae Ascalaphinae), Zootaxa 4970 (3), pp. 401-452 : 442-447

Genus Ptyngidricerus van der Weele, 1909

Ptyngidricerus van der Weele, 1909: 67 . Type species: Idricerus albardanus McLachlan, 1891: 514 . Original designation.

Omanoidricerus Ábrahám & Mészáros, 2002: 397 . Type species: Ptyngidricerus venustus Tjeder & Waterston, 1977: 88 . After Krivokhatsky, 2019: 151.

Diagnosis. Ptyngidricerus can be distinguished from the known genera in the tribe Haplogleniini , except Ptyngidricerus venustus , by the male of this sexually dimorphic species having a heavily dark wing membrane compared to hyaline in females (excepting the darker apical area). Moreover, the length of the tibial spurs is as long as the combined length of Ta1–Ta4, the apical area beyond Sc+R has several rows of cells or forked longitudinal veins, and the forewing has the anal angle distinctly produced into a triangular projection. Sexual dimorphism is absent in P. venustus where the wing membranes of both sexes are hyaline except the subapical dark band and a narrow dark brown marking below the subapical mark at the proximal to hind margin in both wings.

Note. Van der Weele (1909) described Ptyngidricerus based on a single species, Idricerus albardanus McLachlan from Iraq ( Mesopotamia). Currently, the genus includes seven described species, including two subspecies, which are distributed in the Middle East ( Ábrahám & Mészáros 2002; Machado et al. 2019). The first taxonomic revision of the genus Ptyngidricerus was presented by Ábrahám & Mészáros (2002), in which this genus was divided into two monotypic genera, Iranoidricerus for Ptyngidricerus iranensis Kimmins, 1938 , known from Iran [The second species of this genus was recently descrided from Jordan, namely Iranoidricerus jordaniensis Ábraháma & Monnerat, 2021 (Ábraháma & Monnerat 2021)], and Omanoidricerus for Omanoidricerus venustus ( Tjeder and Waterston, 1977) , from Iran and Oman. However, Krivokhatsky (2019) considered Omanoidricerus to be a junior synonym of Ptyngidricerus . Ptyngidricerus currently includes two species, P. pakistanensis and P. venustus in Pakistan, which are narrowly distributed toward the northeastern part of Pakistan.

Key to Ptyngidricerus species from Pakistan

1. Wing membrane hyaline in both sexes, except the dark subapical area and the brownish marking at the distal margin on mediocubital area in female; pterostigma translucent ( Ábrahám & Mészáros 2002: figs 12–13)...................................................................................................... P. venustus Tjeder & Waterston

-. Wing membrane wholly light brown in male, hyaline in female with apical and distal margin on.. mediocubital area with dark brown markings; pterostigma yellowish brown in male, faintly yellow in female ( Ábrahám & Mészáros 2002: figs 8–9)........................................................................ P. pakistanensis Ábrahám & Mészáros