Oelandyla rostrata Jaschhof & Jaschhof 2020, sp. nov.
Creators: name: Jaschhof, Mathias
name: Jaschhof, Catrin
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Cecidomyiidae
Oelandyla
Oelandyla rostrata

description: Oelandyla rostrata sp. nov.
Figs 19–22
Diagnosis. This is a small, delicate, mostly yellowish porricondyline with conspicuously long-necked flagellomeres (Fig. 20) and long, narrow wings (Fig. 22). Structures specific to O. rostrata are the gonostylus, whose strongly convex basal portion supports a long, beak-shaped process with a large apical tooth, and the parameres, which are present as a reversely V-shaped pair of slender, sclerotized rods with flattened apices (Fig. 21, ↓ 1, 2).
Other male characters. Body size 1.3 mm. Head. Postcranial setae sparse. Eye bridge 1 ommatidium long at vertex. Postfrons non-setose. Scape and pedicel nearly concolorous with flagellum. Circumfila on flagellomeres 1–7, evenly ring-shaped or slightly sinuous (Fig. 20). Neck of fourth flagellomere 1.8 times as long as node (Fig. 20). Palpus slightly shorter than head height, consisting of a weak, non-setose palpiger and 4 setose, subcylindrical segments, apical segment longest of all. Thorax. Scutum with 3 brown stripes (1 dorsal and 2 dorsolateral); no light windows; setae sparse. Scutellum conspicuously bright. Pronotum sparsely setose; anepisternum non-setose; anepimeron with 2 setae. Wing (Fig. 22). Length / width ratio 3.8. Proximal half portion of membrane devoid of setae. M 1+2 absent; M 4 indicated as a short, diffuse line. Legs. Foreleg: femur and tibia same length, tibia 1.4 times as long as T 2. Claws crescent-shaped, toothless. Empodia 2/3 as long as claws. Abdomen. Sclerites faintly contrasting with surrounding membrane, sparsely setose. Genitalia (Fig. 21). Ninth tergite subtrapezoid, with long, sparse setae. Gonocoxal synsclerite sparsely setose ventrally, a narrow, non-setose portion ventroanteriorly; ventral emargination broadly U-shaped, unsclerotized basally; medial bridges projecting; dorsoposterior portions extended into rounded, setose lobes; dorsal apodemes short. Gonostylar setae large; apical tooth apparently solid. Aedeagal apodeme slightly longer than parameres, with angular, membranous extension apically. Hypoproct (not illustrated) only slightly smaller than cerci; bilobed apically, each lobe with 1 apical seta. Cerci (not illustrated) largely merged into a single sclerite, with 4 setae on either side near the apex, posterior edge shallowly emarginated.
Etymology. The Latin adjective rostrata means ̒with a beak’, referring to the structure of the gonostylus.
Type material. Holotype. Male, Sweden, Öland, Borgholm, Rönnerum-Abbantorp Nature Reserve, small
bushy mire surrounded by broadleaf forest, 17 June–15 July 2015, Malaise trap, M. & C. Jaschhof (spn. CEC 2552 in NHRS).
description: Published as part of Jaschhof, Mathias & Jaschhof, Catrin, 2020, The Porricondylini (Diptera: Cecidomyiidae: Porricondylinae) of Sweden revisited: descriptions of nineteen new species of ten genera, including a new genus, pp. 151-182 in Zootaxa 4728 (2) on pages 163-165, DOI: 10.11646/zootaxa.4728.2.1, http://zenodo.org/record/3621083