Camptomyia fulva 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 : 296

Camptomyia fulva Mamaev

Figs 21–24

The occurrence of this species in Sweden is attested here by a single male from the Baltic island of Öland. Mamaev (1961) described C. fulva from larvae and adults of both sexes, the larvae found under the bark of oak wood. Spungis (1989), who detected larvae under the bark of several other broadleaf trees, summarized all the information available on larval habitat and geographic distribution, illustrated the male genitalia, and proposed C. juglandis Panelius as a new junior synonym of C. fulva . As the specific name suggests, adults of C. fulva are fulvous, a color that in slide-mounted specimens appears to change into a light yellow ( Panelius 1965, as C. juglandis ; Spungis 1989; MJ, personal observation). This peculiarity, as well as genitalic illustrations available in literature ( Mamaev 1961: fig. 2.9; Spungis 1989: fig. 5.5), led us to the conclusion that our specimen from Öland belongs to the species in question. Panelius’s (1965: fig. 26d) figure of the genitalia of C. juglandis shows slightly shorter gonostyli and massive, convex gonocoxae, but this might be due to preparation artifacts. As noted earlier ( Jaschhof & Jaschhof 2013: 342), C. fulva belongs to the corticalis group, whose numerous species have largely similar male genitalia (for further details, see C. hedmarki ). The literature treating those species is generally not sufficient for the positive identification of males caught in flight. According to what we know of the corticalis group, the following characters in combination appear to be diagnostic of male C. fulva .

Diagnosis. The uniformly yellowish body is, with a length of about 2.5 mm, small compared to similar-looking species. The eye bridge is about 8 ommatidia long dorsally. The number of flagellomeres is 19–24 (21 in the Swedish specimen studied here); the neck of the fourth flagellomere is 1.2 times longer than the node ( Fig. 21 ). The broad empodia are almost as long as the claws. Of the ninth tergite, the posterior edge has a small but distinct emargination medially ( Fig. 23 , ↓ 6); the anterior edge is only vaguely contoured; and the numerous, large setae are concentrated laterally and posteriorly. The slender, bent gonostylus, whose length equals the height of the gonocoxa, is broadest on the basal half and then evenly tapered towards the apex; its bend, however, is not perfectly smooth but slightly angular, as is apparent on the inner (medial) edge ( Fig. 22 ). Most of the setae, some conspicuously larger than others, are located on the basal half of the gonostylus, while the apical fourth portion is covered in dense microtrichia, causing it to appear darker ( Fig. 22 , ↓ 7). The gonocoxal synsclerite is completely setose ventrally, including fine, dense setae in two clusters below the ventral emargination; the somewhat angular emargination has a weakly membranous anterior edge without lobe ( Fig. 22 , ↓ 8); the dorsal apodemes are conspicuously short. The aedeagus including apodeme is 1.5 times longer than, and slightly surmounted by the parameres. The ventral parameres form pointed processes arising from about the midlength of the dorsal parameres, the latter being laterally flattened and rounded apically ( Fig. 24 , ↓ 9); the length ratio of ventral to dorsal parameres is 1:3.

Material studied. Sweden: 1 male, Öland, Mörbylånga, Gamla Skogsby (Kalkstad), mixed broadleaf forest, 5 July–4 August 2016, MT, MCJ & E. Gustavsson (spn. no. CEC 1681 in NHRS) .

Geographic distribution. According to the literature, C. fulva has previously been found in Denmark, Poland, Estonia, Latvia, Lithuania, and the European part of Russia ( Mamaev 1961; Pakalniškis et al. 2000; Panelius 1965; Spungis 1989, 1998).

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.