Aprionus hugini, 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 : 14-15

Aprionus hugini sp. nov.

urn:lsid:zoobank.org:act:431B8648-300E-4873-97C0-515CF228875D

Fig. 7

Diagnosis

The strongly flattened gonostylus is twice as long as wide; its basal half is only slightly convex; the basolateral apophysis is small; and the large tooth is inserted not exactly on the apex but slightly more dorsolaterally (↓, Fig. 7A ). The medial gonocoxal bridges protrude to form subtriangular protuberances (↓), which in related species are much smaller and rounded. The tegmen, which is 2.5 times as long as wide, is broadest beyond the midlength (↓); tegminal fingers, present in 2–4 large pairs, are situated far posteriorly and point laterally rather than posteriorly; the apex of the tegmen is broadly rounded. The sclerotized, anterolateral portions of the subanal plate are distinct, large, and usually perfectly commashaped (↓). As regards the gonocoxites, the dorsal apodemes are so long that the dorsal bridge, which in the typical outline is subtriangular, extends clearly beyond the ventroanterior edge. The postfrons is setose; most of the antennal translucent sensilla are single-pointed, others, especially on proximal flagellomeres, two-pointed or two-branched; the neck of the fourth flagellomere is slightly shorter to slightly longer than the node ( Fig. 7B ); the palpus consists of 4 segments; and postocular bristles number 8–10.

Etymology

Hugin is one of Odin’s two ravens, which serve him as rapporteurs and help compensate his poor eyesight.

Material examined

Holotype

SWEDEN: ♂, Östergötland, Ödeshög, Omberg, Stocklycke meadow, 58.18° N, 14.37° E, calcareous meadow, Malaise trap, Swedish Malaise Trap Project (trap 13, collecting event 909), 25 May–8 Jun. 2003 ( NHRS, no. CEC340 ).

Paratypes

SWEDEN: 11 ♂♂, same data as for the holotype ( NHRS, nos CEC 341– CEC 351); 6 ♂♂, same data (collecting event 1647), but 2–23 Aug. 2005 ( NHRS, nos CEC 352– CEC 357); 1 ♂, same data (collecting event 1644), but 12–20 Jul. 2005 ( NHRS, no. CEC 358).

Other material studied

SWEDEN: 1 ♂, Östergötland, Ödeshög, Omberg, Beech NR, 58.17° N, 14.38° E, beech forest, MT, SMTP (trap 16, collecting event 1667), 5–19 Jul. 2005 ( DEI, no. CEC 359); 1 ♂, Småland, Nybro, Bäckebo, Grytsjön NR, 56.92° N, 16.10° E, swampy meadow at forest edge, MT, MCJ leg., 17 Jun.–16 Jul. 2015 ( DEI, no. CEC 360); 1 ♂, Öland, Mörbylånga, Ottenby, Södra lunden, 56.13° N, 16.25° E, nemoral grove, MT, SMTP (trap 21, collecting event 993), 23 Jun.–26 Jul. 2005 ( DEI, no. CEC 361).

GERMANY: 1 ♂, Mecklenburg-Vorpommern, Galenbecker See, 11 km SE of Friedland, swampy birch forest, aspirator, MJ leg., 10 Jun. 1994 ( DEI, no. A2309); 1 ♂, same locality data, but swampy meadow, yellow pan trap, 25–27 May 1994 ( DEI, no. A2320); 1 ♂, same data, but ground emergence trap, Jun. 1994 ( DEI, no. A2321).

Differential diagnosis

Aprionus hugini sp. nov. is distinguished from the other species of the styloideus group in the medial gonocoxal bridges, which protrude strongly, and in the characteristic outline of the tegmen, as described above. The gonostylus of Aprionus hugini sp. nov. resembles that of A. paludosus Jaschhof & Mamaev, 1997 stat. rev., a species redescribed below, except that in A. paludosus the basolateral apophysis is larger, or normally developed.

Distribution and phenology

Sweden (Småland, Öland, Östergötland), Germany (Mecklenburg-Vorpommern). Adults were collected in May to August mainly in swampy meadows, the habitat apparently preferred by this species.

Figures

Fig. 7. Aprionus hugini sp. nov., holotype, ♂. A. Genitalia, ventral. B. Fourth flagellomere, lateral. Scale lines: 0.05 mm. Arrows indicate diagnostic characters.