Winnertzia pinicola Kieffer. Another 1913

• Main Authors: Jaschhof, Mathias, Jaschhof, Catrin
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2020
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Insecta; Diptera; Cecidomyiidae; Winnertzia; Winnertzia pinicola; Northern Sweden
• Online Access: https://doi.org/10.5281/zenodo.4402625; http://treatment.plazi.org/id/03C00F49FFAC6E10FF57FA539E95FCD1

Winnertzia pinicola Kieffer Diagnosis. A medium-sized, brown Winnertzia , whose male genitalic structures (Jaschhof & Jaschhof 2013: fig. 40A–B) provide the best characters for distinguishing it from both W. nigripennis and W. solidaginis agg. Most importantly, the gonostylus of W. pinicola is very gently tapered from the broad base towards the apex, the latter bearing the comparatively narrow pectinate claw. Furthermore, of the gonocoxal synsclerite, the ventroanterior edge is broadly rounded, the ventral emargination is U shaped, with a moderately large membranous area basally, and the dorsal apodemes are fairly long; the posterior edge of the ninth tergite, which is comparatively narrow, has a fairly deep, wide concavity medially; and the aedeagal apodeme has often, but not always, a slight broadening apically that is faintly reminiscent of an anchor-shape. As a non-genitalic distinction, the empodia are as long as the claws. See also W. acutistylus , a new species described below to have an apically constricted gonostylus. Discussion. The material we studied contains a few specimens (GULI000020965, GULI000020967 and CEC3270–CEC3273) that, although closely resembling W. pinicola , do not perfectly match the diagnosis given above. We deem it possible that they belong to one or more sibling species. One of the characters found to vary is the vestiture on the aedeagal bulge, which in some specimens is considerably denser than in others, and, especially at the base of the bulge, resembling knobs rather than spike-shaped microtrichia. It is obvious that W. pinicola will need further attention by taxonomists, and that revisional work in the future should consider to designate a neotype for this species once the delineation problems are satisfyingly resolved. Distribution in Sweden. All but one of the 48 specimens we studied of W. pinicola were collected in the southern half of Sweden, the northernmost distribution being Uppland. Our only specimen from northern Sweden is from Västerbotten. Material studied. ...