Dicerura jakovlevi Jaschhof & Spungis, 2018

Jaschhof, Mathias & Spungis, Voldemars, 2018, Towards reliable identification of male Dicerura: descriptions of three new and seven poorly known species in the Palearctic region (Diptera: Cecidomyiidae, Porricondylinae), Zootaxa 4422 (1), pp. 85-103 : 88-89

publication ID

https://doi.org/ 10.11646/zootaxa.4422.1.5

publication LSID

lsid:zoobank.org:pub:D167DDAD-17D0-4F35-9873-85B4BC7E8FEB

DOI

https://doi.org/10.5281/zenodo.5966090

persistent identifier

https://treatment.plazi.org/id/9E1D954C-FFE6-966E-FF51-FDE3D86FFCD7

treatment provided by

Plazi

scientific name

Dicerura jakovlevi Jaschhof & Spungis
status

sp. nov.

Dicerura jakovlevi Jaschhof & Spungis sp. nov.

Figs 1–2 View FIGURES 1–2

Diagnosis. Dicerura jakovlevi differs from the other species of the iridis group in the gonostylus, whose small mediobasal lobe is angular-shaped and markedly bulging ( Fig. 1 View FIGURES 1–2 , ↓1); the gonocoxites, whose ventroposterior edge is broadly, darkly pigmented ( Fig. 1 View FIGURES 1–2 , ↓2); and the tegmen, whose basal portion is unusually strongly constricted, thus providing just a narrow base for the broader, cap-like apex ( Fig. 1 View FIGURES 1–2 , ↓3). See below D. stipator ( Figs 25–27 View FIGURES 25–27 ),

which is another member of the iridis group with darkly pigmented gonocoxites.

Other male characters. Body length 3.0 mm. Head. Eye bridge 3–4 ommatidia long dorsally. Antenna as long as body; scape and pedicel concolorous with flagellum. Circumfila with 1–2 rather short extensions. Neck of fourth flagellomere 1.6 times longer than node. Palpus 4-segmented, 0.8 times the length of head height, third and fourth segments with tendency to merge. Thorax. Scutum with dark stripes dorsally and laterally. Anepisternum with 2–3 setae. Wing as long as body, with brownish tinge. M1+2 weak, reduced to short remnants apically and basally. Legs. Empodia rudimentary. Claws slightly bent, 3–4 basal teeth gradually decreasing in size. Genitalia. Ninth tergite subtrapezoid, strongly tapered towards apex, with setae of various lengths dispersed over entire surface; anterior edge straight, faintly contoured; posterior edge either truncate (holotype) or slightly concave (paratype), densely covered with short, thick microtrichia ( Fig. 2 View FIGURES 1–2 ). Gonocoxites: ventral emargination angular, with slightly convex basal edge; ventromedial processes slightly smaller than dorsolateral processes, all with dense, large microtrichia and a few setulae; dorsal portions strongly protruding posteriorly; dorsal apodemes moderately long ( Fig. 1 View FIGURES 1–2 ). Gonostylus 1.5 times longer than broad, strongly tapered towards apex ( Fig. 1 View FIGURES 1–2 ). Apex of tegmen broadly rounded, 1 small, sclerotized barb on either side ( Fig. 1 View FIGURES 1–2 ). Apical fork of ejaculatory apodeme rather small, one fourth as long as apodeme’s total length ( Fig. 1 View FIGURES 1–2 ).

Etymology. We name this new species after the Russian entomologist Jevgeni Jakovlev (Vantaa, Finland), in appreciation of his valuable contributions to the taxonomy, faunistics and biology of northern European Sciaroidea.

Type material. Holotype. Male , Finland, Tavastia australis, Lammi, Biological Station, emergence trap on trunk of gray alder, 28 July–27 September 2005, J. Jakovlev (in MZH). Paratype . Male, same data as for the holotype (specimen no. A 7775 in SDEI).

MZH

Finnish Museum of Natural History

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Cecidomyiidae

SubFamily

Porricondylinae

Genus

Dicerura

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