Camptomyia ulmicola Mamaev, 1961

Jaschhof, Mathias & Jaschhof, Catrin, 2019, New and rarely found species of asynaptine Porricondylinae (Diptera: Cecidomyiidae) in northern Europe, Zootaxa 4604 (2), pp. 281-300 : 297-299

Camptomyia ulmicola Mamaev

Figs 28–33

As described above, C. ulmicola in the sense by Jaschhof & Jaschhof (2013: 349f.) is based on misidentification, with all the specimens referred to in that publication belonging to C. capitata , a new species named in the present paper. That the genuine C. ulmicola does occur in both Sweden and Finland is attested by several findings listed below. These siblings can be distinguished from each other by male genitalic characters (see C. capitata and the diagnosis below of C. ulmicola ). Since genitalic illustrations in previous literature ( Mamaev 1961: fig. 2.3, Spungis 1989: fig. 2.9) are not sufficient for the purpose of differentiation, C. ulmicola is re-illustrated here on the basis of specimens from Sweden. To make sure that our specimens were correctly identified, we compared these with micrographs of the holotype male of C. ulmicola , which were kindly provided to us by Tsuyoshi Yagi (Sanda, Japan).

Diagnosis. A set of male genitalic characters is diagnostic of C. ulmicola , as follows. The moderately long gonostylus is slightly bent ( Figs 29–30 , ↓ 5); the gonocoxal synsclerite has a deep ventral emargination whose shoulders are conspicuously angular (as opposed to the more rounded outline typical of most other Camptomyia ) ( Fig. 29 ); and the long, narrow aedeagus, which is slightly thickened subapically and rounded apically, is wrapped up by the parameres, leaving only their apices free ( Figs 32–33 , ↓ 6).

Other male characters. Body size 2.0– 2.7 mm. Head. Eye bridge 10–12 ommatidia long dorsally. Scape and pedicel concolorous with flagellum. Flagellomeres 18–22. Neck of fourth flagellomere 1.3 times as long as the node ( Fig. 28 ). Palpus with 4 segments, 1.8 times longer than head height. Wing longer than body, 2.6 times longer than wide. Legs. Claws with single large tooth basally. Empodia broad, half as long as claws. Genitalia. Ninth tergite strongly narrowed anteriorly, posterior portion consisting of 2 lobes with deep notch in between, each lobe with a single seta ( Fig. 31 ). Gonocoxal synsclerite about as long as broad; setae on ventral bridge sparse; anterior edge slightly convex, reinforced; ventral emargination weakly membranous anteriorly, without lobe; dorsal apodemes shorter than the distance separating them ( Fig. 29 ). Shape of aedeagal apex varying among specimens (see Fig. 32 versus 33). Gonostylus slightly tapered towards apex, with small, comb-like claw apically ( Figs 29–30 ). Base of aedeagal apodeme T-shaped ( Fig. 32 ). Parameral apodemes large, spoon-shaped ( Fig. 32 ).

Material studied. Sweden: 2 males, Öland , Mörbylånga , Gamla Skogsby (Kalkstad), mixed broadleaf forest with accumulation of dead ash wood, 5 August–5 September 2016, MT, MCJ & E. Gustavsson (spn. no. CEC 1717 in NHRS, spn. no. CEC 1716 in SDEI) ; 1 male, same locality but 27 June–30 July 2014, MT, MCJ (spn. no. CEC 1715 in SDEI) ; 1 male, Mörbylånga , St. Dalby lund NR, mixed broadleaf forest with accumulation of dead ash wood, 8 June–8 July 2015, MT, MCJ (spn. no. CEC 1718 in NHRS) ; 1 male, same data but 9 July–8 August 2015 (spn. no. CEC 1719 in SDEI) ; 1 male, Bohuslän , Tanum , Hamburgsund, Stora Snixholmen, coastal heathland, 17 June–2 July 2004, MT, SMTP (trap 32, collecting event 1068) (spn. no. CEC 1742 in NHRS) ; 1 male, Uppland , Håbo, Biskops Arnö, swampy grove, 5 September–15 November 2005, MT, SMTP (trap 8, collecting event 1604) (spn. no. CEC 1743 in NHRS) . Finland: 1 male, Tavastia australis, Lammi, Untulanharju, mixed forest, 13 August 2007, sweepnet, J. Penttinen (in MZH) .

Notes on the geographic distribution. Camptomyia ulmicola is known to occur in the European part of Russia ( Mamaev 1961); Ukraine, Estonia and Latvia (V. Spungis, by e-mail of 1 st February 2019); Sweden and Finland (this paper). The Polish record of C. ulmicola referred to by Spungis (1989) needs validation as confusion with C. capitata is possible.

Figures

FIGURES 25–33. Morphologyof Camptomyia spp. 25–27:C. piptopori, specimen from Sweden; 28–33:C. ulmicola, specimens from Sweden. 25: Aedeagus and parameres, ventral. 26: Genitalia, ventral. 27: Ninth tergite, dorsal. 28: Fourth flagellomere, lateral. 29: Genitalia, ventral. 30: Gonostylus, dorsal. 31: Ninth tergite, dorsal. 32: Aedeagus and parameres, ventral. 33: Apex of aedeagus and parameres, ventral, variation. Scales for 25–26, 28–29, 0.05 mm, for 27, 30–32, 0,025 mm. Arrows refer to characters described in the diagnoses.