Glossostyles perspicua Jaschhof & Sikora, 2017

Sikora, Tomáš, Jaschhof, Mathias & Ševčík, Jan, 2017, Glossostyles perspicua gen. et sp. nov. and other fungivorous Cecidomyiidae (Diptera) new to the Czech and Slovak Republics, European Journal of Taxonomy 303, pp. 1-29 : 6-8

Glossostyles perspicua Jaschhof & Sikora gen. et sp. nov.

urn:lsid:zoobank.org:act:5C7275CB-7B7F-4FAD-808F-3E346206447A

Fig. 3 A–F

Diagnosis

This species differs from the other Porricondylini in the characters referred to in the generic diagnosis of Glossostyles gen. nov. In particular, the tongue-shaped gonostyli, which are unusually large and directed ventromedially, make G. perspicua gen. et sp. nov. unmistakable.

Etymology

The species epithet ‘ perspicua ’ is a Latin adjective, meaning ‘unmistakable’.

Type material

Holotype

CZECH REPUBLIC: ♂, Bohemia, Šumava Mts, Zhůřské slatě, peat-bog, 24 Jun.–28 Jul. 2000, MT, M. Barták and Š. Kubík leg. (NMPC-35000).

Paratype

CZECH REPUBLIC: ♂, Bohemia, Šumava Mts, Horská Kvilda, spruce forest, 20 May–17 Jun. 1999, MT, M. Barták and J. Roháček leg. (NMPC-35001).

Other material studied

SWEDEN: ♂, Södermanland, Tyresta NP, Naturvårdsverket inventory site “1 south”, 15 Jul.–26 Aug. 2000, B. Viklund, L.-O. Wikars and H. Ahnlund leg. ( NHRS-GULI 000022473); 14 ♂♂, 12 ♀♀, same locality, site “4”, 10–26 May 2001 ( NHRS-GULI 000022471, -472, -474–479 and SDEI).

Description

Male

Body. Size up to 2.2 mm.

HEAD. Postfrons asetose. Eye bridge 3–4 ommatidia long dorsally. Antenna slightly longer than body. Scape and pedicel lighter than flagellum. Circumfila on flagellomeres 1–14, evenly ring-shaped. Neck of fourth flagellomere 1.2 times as long as node ( Fig. 3E ). Palpus 1.3 times as long as head height, 4 subcylindrical segments, fourth segment longest of all.

THORAX. Anepisternum and anepimeron setose. Wing ( Fig. 3A ) longer than body. Length /width 2.8. Rs strongly oblique, almost in line with R 5. Btv sinuous. A remnant M 1+2 present at wing margin. M 4 weak, approaches CuA. Legs densely covered with narrow scales, conspicuously light setae on third to fifth tarsomeres (therefore tarsi white-tipped). Claws moderately curved, 1 large and 2–4 smaller teeth basally. Empodia broad, as long as claws.

ABDOMEN. Sclerites entire, setae long, aligned on posterior margin, dispersed elsewhere. Pleural membrane sparsely setose.

GENITALIA ( Fig. 3D ). Ninth tergite subtrapezoid. Gonocoxae broad, sparsely setose ventrally, with membranous, glabrous lobe medially on posterior edge; apodemes thick, long. Gonostylus massive, but appears surprisingly slender in strict lateral view ( Fig. 3B ), slightly curved, longer than gonocoxa, broadest at mid-length, constricted subbasally, on apex a few thin spines intermingled with long microtrichia, setae of various lengths elsewhere. Tegmen subtrapezoid in ventral view, with narrow collar apically, small apodemes beyond mid-length. Ejaculatory apodeme longer than gonocoxites, moderately sclerotized.

Female

BODY. Size up to 2.8 mm.

HEAD. Antenna with 11 flagellomeres. Flagellomeres with elongate-subcylindrical nodes, distinct necks, circumfila as in Fig. 3F . Neck of fourth flagellomere more than half as long as node.

GENITALIA ( Fig. 3C ). As typical for Porricondylini , including unusually large ninth tergite, 2-segmented dorsal lamella. Disticercus slightly smaller than basicercus.

Note on identification

The specimens of G. perspicua gen. et sp. nov. from Tyresta were initially identified as an unnamed species of Porricondylini by Voldemars Spungis, University of Latvia, who worked, but never published, on the Porricondylinae from the Tyresta insect inventory in the early 2000s. Due to the rather poor state of preservation, those specimens remained undescribed in Jaschhof & Jaschhof’s (2013) revision of Swedish Porricondylinae .

Figures

Fig. 3. Morphology of Glossostyles perspicua Jaschhof & Sikora gen. et sp. nov. A. Wing, setae omitted (♀ from Tyresta). B. Gonostylus, lateral (specimen from Tyresta). C. Female genitalia, lateral view (specimen from Tyresta). D. Male genitalia, ventral (holotype). E. Male fourth flagellomere, lateral view (holotype). F. Female fourth flagellomere, lateral (specimen from Tyresta). Scale bars: A = 1 mm; B–F = 0.05 mm.