Bryocrypta angustata Mamaev, 1966

Jaschhof, Mathias & Jaschhof, Catrin, 2020, The Porricondylini (Diptera: Cecidomyiidae: Porricondylinae) of Sweden revisited: descriptions of nineteen new species of ten genera, including a new genus, Zootaxa 4728 (2), pp. 151-182 : 177

Bryocrypta angustata Mamaev

Fig. 48

Aside from one species each in Ethiopia and India, Bryocrypta is a primarily Palearctic genus ( Gagné & Jaschhof 2017). Five of the six Palearctic species are known to occur in Europe, but only B. dubia Kieffer and B. indubitata Mamaev are found there more commonly. Both were previously reported from Sweden ( Jaschhof & Jaschhof 2013: 169 ff.). Here we document the occurrence of another two Bryocrypta in Sweden: B. angustata Mamaev , previously known from Latvia and the European part of Russia, and B. lobata Mamaev , previously known from Ukraine.

Our specimens of B. angustata , two males from two different localities in southern and central Sweden, fit Mamaev’s (1966) original description of this species, which states that the gonostylus is six times as long as broad and the aedeagus (what is meant here is the tegmen) is unsclerotized. Illustrations of B. angustata have not been provided in previous literature and the whereabouts of the holotype is unclear. The diagnosis and illustration presented here of this species are based on the Swedish material at our disposal.

Diagnosis. Bryocrypta angustata is characterized by male genitalic features, as follows ( Fig. 48 ). A peculiarity of this species is the tegmen, which is twice as broad as the gonostylus, nearly parallel-sided and, especially on the apical half, poorly sclerotized. The apical edge of the tegmen, which is hard to discern, is broadly rounded and beset with a few sparse microtrichia (↓ 1). The parallel-sided, slightly curved gonostylus is six times as long as broad (↓ 2), which equals the length of the gonocoxa, and bears a small, pectinate claw apically. The ventral portions of the gonocoxal synsclerite are strongly narrowed posteriorly into a pair of subtriangular, densely setose lobes (↓ 3). These lobes border a small, U-shaped emargination whose space is filled by a weak bulge bearing microtrichia and two or three apical setulae.

Material studied. Sweden: 1 male, Småland, Nybro, Alsterbro, backyard, 27 May–19 June 2016, MT, MCJ & S.-O. Ulefors (spn. CEC 1953 in SDEI) ; 1 male, Södermanland, Tyresö, Åva, Spirudden, oak forest near coast, 2–11 July 2003, MT, SMTP (trap 1, collecting event 80) (spn. CEC 1954 in NHRS) .

Figures

FIGURES 48–49. Male genitalia of Bryocrypta angustata (48) and Bryocrypta lobata (49), ventral, specimens from Sweden. Scales 0.05 mm. Arrows refer to characters described in the diagnoses.