Dicerura penttineni Jaschhof & Spungis

Jaschhof, Mathias & Spungis, Voldemars, 2018, Towards reliable identification of male Dicerura: descriptions of three new and seven poorly known species in the Palearctic region (Diptera: Cecidomyiidae, Porricondylinae), Zootaxa 4422 (1), pp. 85-103: 89

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Dicerura penttineni Jaschhof & Spungis

sp. nov.

Dicerura penttineni Jaschhof & Spungis   sp. nov.

Figs 3–5 View FIGURES 3–5

Diagnosis. The gonostylus of D. penttineni   , another species of the iridis   group, is narrowly rounded apically,

bulbous medially, and provided with a small, subglobular lobe mediobasally that is covered with dense, conspicuously large microtrichia, a few setulae and 2–3 short bristles ( Fig. 3 View FIGURES 3–5 , ↓1). Of the gonocoxites, the ventral emargination is conspicuously shallow and angular-shaped ( Fig. 3 View FIGURES 3–5 , ↓2) and the two pairs of processes on either side

of the emargination are same size. The cap-like apex of the tegmen, which is pointed, has a single pair of small barbs laterally ( Fig. 5 View FIGURES 3–5 , ↓3). The apical fork of the ejaculatory apodeme is one fourth as long as the apodeme’s total

length ( Fig. 5 View FIGURES 3–5 ). The ninth tergite is strongly tapered towards the apex, which is bilobed and covered densely in short, thick microtrichia ( Fig. 4 View FIGURES 3–5 , ↓4). The genitalia of D. penttineni   closely resemble that of D. triangularis   , a

species differing in that the gonostylar lobe is flat and angular, the dorsolateral pair of gonocoxal processes is

larger, and the ventral gonocoxal emargination is rounded ( Jaschhof & Jaschhof 2013: fig. 59).

Other male characters. Body length 3.3 mm. Head. Eye bridge 4–5 ommatidia long dorsally. Antenna

slightly longer than body; scape and pedicel lighter than flagellum. Circumfila with 1 rather short extension. Neck

of fourth flagellomere 1.8 times longer than node. Palpus 4-segmented, as long as head height. Thorax. Scutum

with dark stripes dorsally and laterally. Anepisternum with 5–6 setae. Wing as long as body, with brownish tinge.

M1+2 reduced to short remnant apically. Legs. Empodia rudimentary. Claws slightly bent, 4 basal teeth gradually

decreasing in size. Genitalia. Ninth tergite: setae of various lengths dispersed over entire surface; anterior edge

straight, faintly contoured ( Fig. 4 View FIGURES 3–5 ). Gonocoxites sparsely setose ventrally; dorsal portions protruding, slightly

angular-shaped posteriorly; dorsal apodemes moderately long ( Fig. 3 View FIGURES 3–5 ). Gonostylus twice longer than broad, apex

slightly curved, lateral setae larger than medial setae ( Fig. 3 View FIGURES 3–5 ). Ejaculatory apodeme slightly thickened on basal half

( Fig. 3 View FIGURES 3–5 ).

Etymology. This species is named after the Finnish biologist Jouni Penttinen (Kuopio, Finland), who, earlier

in the present century, worked on the taxonomy and faunistics of Finnish Porricondylinae   . As a lasting proof of his

talent and enthusiasm as a taxonomist, he left a rich collection of well-prepared specimens, which includes several

new, yet unnamed species.

Type material. Holotype. Male , Finland, Kuusamo, Kuohusuo-Kalliovaara 30 km S Kuusamo, mixed forest of  

spruce and birch trees, 31 July –2 August 2004, sweepnet, M. Jaschhof (in MZH). Paratypes. 2 males, same data as  

for the holotype (specimen no. A 7774 in SDEI, the other (without no.) in MZH).


Finnish Museum of Natural History