Asynapta baltica Spungis, 1988

Jaschhof, Mathias & Jaschhof, Catrin, 2019, New and rarely found species of asynaptine Porricondylinae (Diptera: Cecidomyiidae) in northern Europe, Zootaxa 4604 (2), pp. 281-300 : 293-294

Asynapta baltica Spungis

Figs 18–19

As mentioned above under A. rickebasta , our previous report of A. baltica occurring in Sweden (Jaschhof & Jas- chhof 2013: 314f.) was based on misidentification and is herewith withdrawn. A definite proof of the Swedish distribution of this species is presented here by all of three males from Uppland ( Fig. 18 ) and Dalarna, whose specific identity we verified by comparison with specimens from Latvia and Ukraine authoritatively determined by Voldemars Spungis. In terms of male morphology A. baltica resembles two new Asynapta described above, A. rickebasta and A. taigensis , from which it differs as follows.

Diagnosis. The gonostylus, which is markedly bent and strongly tapered towards the apex, has an unusually small claw apically ( Fig. 18 , ↓ 1). The gonocoxal synsclerite is clearly broader than long, and its common ventroanterior edge is straight rather than convex ( Fig. 18 ). The ventral parameres are reduced to form a small, rectangular structure, which projects ventrally through the gonocoxal emargination ( Fig. 18 , ↓ 2); from a different angle the rectangle’s side edges appear thickened and strongly sclerotized ( Fig. 19 ).

Material studied. Sweden: 1 male, Uppland, Håbo, Biskops Arnö , swampy grove, 7 September 2003 – 1 June 2004, MT, SMTP (trap 8, collecting event 394) (spn. no. CEC 1631 in NHRS) ; 2 males, Dalarna, Säter, Säterdalen, Näsåkerspussen , alder forest, 18–31 May 2005, MT, SMTP (trap 10, collecting event 1621) (spn. no. CEC 1755 in NHRS, spn. no. CEC 1756 in SDEI) . Latvia: 2 males, Saulkalne , 28 May 1981 and 20 May 1985, V. Spungis (in IBUL) . Ukraine: 1 male, Kievskaja oblast, Malaja Olshanka , 19 May 1987, Z.L. Berest (in IBUL) .

Geographic distribution. The distribution as presently known of A. baltica comprises Sweden (Uppland, Dalarna), Latvia, and Ukraine ( Spungis 1988; this paper).

Figures

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.