Aprionus fontanus, Jaschhof & Jaschhof, 2017

Jaschhof, Mathias & Jaschhof, Catrin, 2017, New species of Aprionus (Diptera, Cecidomyiidae, Micromyinae) from Sweden and other parts of the Palearctic region, European Journal of Taxonomy 378, pp. 1-38 : 25-26

Aprionus fontanus sp. nov.

urn:lsid:zoobank.org:act:0742E67D-D01A-433D-A76E-98ABBB654340

Fig. 14

Diagnosis

A combination of male genitalic characters is diagnostic of Aprionus fontanus sp. nov., as follows ( Fig. 14A ). The long tegmen is sharply pointed apically (↓), undoubtedly a firm shape considering that the margins are reinforced. The apical portion of the gonostylus is strongly bent dorsally to dorsolaterally (↓); the gonostylar tooth is flattened; 2 strong bristles are inserted medially. The subrectangular ventral plate has a characteristic pattern of dark markings, including an inverted V-shape medially on the anterior edge.

Etymology

The species epithet, fontanus , is a Latin adjective meaning ‘belonging to the spring’.

Material examined

Holotype

GERMANY: ♂, Bavaria, Berchtesgaden National Park, Schapbach alp, Schapbach , 1150 m a.s.l., emergence trap, I. Schrankel leg., 21 Jun. 1996 ( DEI, no. A7655 ).

Differential diagnosis

Aprionus angeloides Jaschhof, 1997 , a species known from Swedish Lapland, bears a faint resemblance to A. fontanus sp. nov., in particular regarding the outline of the gonostylus and tegmen (see Jaschhof 1998: fig. 148).

Other characters

Body size 1.2 mm.

HEAD. Postfrons setose. Eye bridge 2–3 ommatidia long dorsally. A sparse row of 7 postocular bristles. Neck of fourth flagellomere slightly longer than node, translucent sensilla simply hair-shaped ( Fig. 14B ). Palpus 3-segmented, apical segment longest of all.

WING. ApicR 1 3.0 times as long as Rs.

LEGS. Claws subrectangular, toothless. Empodia rudimentary.

TERMINALIA ( Fig. 14A ). Ninth tergite subrectangular, anterior margin fully sclerotized. Gonocoxites rounded rather than pointed ventroposteriorly; dorsal bridge extends far anteriorly, subtrapezoid.

Distribution and phenology

Germany (Bayern). This species is known from a single specimen found in the course of an inventory of springs and spring biota in the Berchtesgaden National Park (see http://alpenquellen.com/projektgebiet_ berchtesgaden.htm, accessed 26 Nov. 2016).

Figures

Fig. 14. Aprionus fontanus sp. nov., holotype, ♂. A. Genitalia, ventral. B. Fourth flagellomere, lateral. Scale lines: 0.05 mm. Arrows indicate diagnostic characters.