Asynapta rickebasta, Jaschhof & Jaschhof, 2019

Jaschhof, Mathias & Jaschhof, Catrin, 2019, New and rarely found species of asynaptine Porricondylinae (Diptera: Cecidomyiidae) in northern Europe, Zootaxa 4604 (2), pp. 281-300 : 286

Asynapta rickebasta sp. nov.

Figs 2–3 , fig. 150 in Jaschhof & Jaschhof (2013)

This new species was erroneously referred to as A. baltica Spungis in our revision of Swedish Porricondylinae ( Jaschhof & Jaschhof 2013: 314f.), where we described it on the basis of three males from Uppland. As these are the only specimens known of this species, they are designated here as the types of A. rickebasta . While the species description published in 2013 is fully applicable to A. rickebasta , an updated diagnosis is presented here taking A. baltica and A. taigensis sp. nov., two species resembling A. rickebasta , into account.

Diagnosis. The ventral parameres of A. rickebasta are unique in forming a triangle-shape with a somewhat raised, longitudinal axis, which appears as an unsharp dark line in slide preparations ( Fig. 3 , ↓ 2). A pair of membranous, faintly contoured lobes basally of this triangle is also believed to be of parameral origin ( Fig. 3 ). The helmetshaped gonostylus is slightly swollen below the apical claw, which consists of numerous spines forming a broad comb ( Fig. 2 , ↓ 1). The gonostylus of A. baltica is similar, except that the apex is narrower and the apical claw, which actually is a solid tooth, is smaller ( Fig. 18 , ↓ 1). The gonostylar structure in A. taigensis is unmistakable in that the area below the claw is strongly swollen, with the result that the claw, a comb of rather small size, is in a subapical position ( Fig. 4 , ↓ 3). The parameres of A. baltica ( Figs 18–19 ) and A. taigensis ( Fig. 4 , ↓ 4) are quite unlike that found in A. rickebasta , which provides another effective distinction.

Etymology. The species name, a noun in apposition, refers to the type locality, Rickebasta Nature Reserve in Sweden’s province Uppland.

Type material. Holotype. Male , Sweden, Uppland , Knivsta, Rickebasta Nature Reserve, swamp forest of alder, 25 June–31 July 2009, Malaise trap, M. & C. Jaschhof (spn. no. GULI000024094 in NHRS). Paratypes. 1 male, same data as the holotype (spn. no. GULI000024093 in NHRS) ; 1 male, same data (spn. no. SE 2051 in SDEI) .

Figures

FIGURES 1–4. Genitalic morphology of Asynapta spp. 1: Gonostylus of A. inflatoides, ventral, paratype. 2: Gonostylus of A. rickebasta, ventral, holotype. 3: Aedeagus and parameres of A. rickebasta, ventral, holotype. 4: Genitalia of A. taigensis, ventral, holotype. Scales for 1–3, 0.025 mm, for 4, 0.05 mm. Arrows refer to characters described in the diagnoses.

FIGURES 18–24. Morphology of Asynaptini spp. 18: Genitalia of Asynapta baltica, ventral, specimen from Sweden. 19: Aedeagus and parameres of A. baltica, ventral, specimen from Latvia. 20: Genitalia of Asynapta inflata, ventral, specimen from Sweden. 21–24: Camptomyia fulva, specimen from Sweden. 21: Fourth flagellomere, lateral. 22: Genitalia, ventral. 23: Ninth tergite, dorsal. 24: Aedeagus and parameres, ventral. Scales for 18, 20–22, 0.05 mm, for 19, 23–24, 0.025 mm. Arrows refer to characters described in the diagnoses.