Drapetis bruscellensis, Grootaert, 2016
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publication ID |
https://doi.org/ 10.5281/zenodo.13272833 |
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publication LSID |
lsid:zoobank.org:pub:7E2410C8-8A6E-4C3E-A64B-B2C7E2CF112C |
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persistent identifier |
https://treatment.plazi.org/id/03CF87ED-152A-FFFA-FD98-FE10FAB8FCAA |
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treatment provided by |
Felipe |
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scientific name |
Drapetis bruscellensis |
| status |
sp. nov. |
Drapetis bruscellensis View in CoL sp. nov.
Figs 2-8 View Fig View Figs 3-8
TYPE MATERIAL. Holotype ♂, BELGIUM, Auderghem , Jardin botanique Jean Massart, 1-8.VII.2015 (Malaise trap 2; leg. A. Drumont, H. Raemdonck, A. Pauly; I.G.: 33.004, RBINS).
Paratypes: 4♂, Auderghem, Jardin botanique Jean Massart, 1-8.VII.2015 (Malaise trap 2; leg. A. Drumont, H. Raemdonck, A. Pauly; RBINS) ; 1♂, 15-22.VII.2015 (Malaise trap 2; leg. A. Drumont, H. Raemdonck, A. Pauly; I.G.: 33.004, RBINS) .
ETYMOLOGY. The specific epithet refers to the city of Brussels known for the many parks and the famous old Sonian forest at its eastern border where the Jardin botanique Jean Massart is situated, type locality of the new species .
DIAGNOSIS. Haltere white. Scape black, pedicel contrastingly orange brown, with ventral bristles longer than half the length of pedicel. Postpedicel dark brown. No pale upturned bristle on prothoracic episterna. Wing clear, veins pale brown, tip of R 1 and costa between R 1 and R 2+3 darker; R 4+5 slightly undulating tip turning up when reaching costa. Distance between cross veins r-m and m-m slightly shorter than half the length of basal portion of vein M 1+2 (upper cross vein beyond the middle of the second basal cell). Cerci thin rod-like, equally long with apices connected with a sclerotized bridge.
Male ( Fig. 2 View Fig )
Body length: 2.0 mm; wing 1.8 mm.
Head. Black in ground-colour. Frons narrower than scape, dusted; face narrower than frons, almost linear. All hairs and bristles on head brownish. Anterior ocellar bristles a little longer than postpedicel, crossing; median ocellars nearly as long, diverging; a few tiny posterior ocellars. A pair of long vertical bristles, at outside 2 shorter brown bristles. Occiput densely set with short bristles, becoming longer below. Antenna ( Figs 2-3 View Fig View Figs 3-8 ) with black scape, reddish brown pedicel and brown postpedicel; scape short, ring like; pedicel with a circlet of short brownish hairs that are ventrally longer than half the length of the pedicel; postpedicel 1.5 times as long as wide, triangular, with a long black apical stylus which is about 2.5 times as long as all antennal segments combined. Palpus short, elongate ellipsoid, brown in ground-colour, with a pale subterminal bristle. Proboscis brown.
Thorax mostly shining black, except for prothoracic episterna, upper part of mesopleuron, pteropleuron and metapleuron that are somewhat dusted and bear hairs; especially mesopleuron is densely set with short hairs. No turned up bristle on prothoracic episterna.
Mesonotum densely set with rather short yellowish hairs; acrostichals not distinct from other hairs except for a single pair anteriorly; a pair of brown prescutellar dorsocentrals, 3–4 distinct brown notopleurals, 2 pairs of scutellars with a pair of long brown apicals crossing; lateral scutellars shorter.
Legs yellow including fore and mid coxae but hind coxae brown. Mid femur ventrally with a brownish streak. Hind femur with a broad brown ring in middle. All tarsi dusky yellowish. Legs short haired only with few distinct bristles.
Fore coxa set with short yellowish bristles; mid coxae with the exterior apical border black, anteriorly with long yellow apical bristles. Tip of hind coxa on inner side with a short toothlike projection.
Fore femur thickened in middle with inconspicuous bristles. Mid femur narrower than fore femur, a short pale basal ventral bristle; washboard-like ribs on anterodorsal surface present ( Fig. 4 View Figs 3-8 ). Hind femur a little wider and much longer than mid femur, arched dorsoventrally, with a short pale anterior preapical, dorsally at base with about 4 not very long erect bristles, ventrally with only short inconspicuous hairs.
Fore tibia a little shorter than fore femur and half as wide as fore femur, with short pale apical bristles. Mid tibia shorter than mid femur. Hind tibia with a weakly pronounced anterior apical tooth and an elongated central posterior concavity that extends for about a third of the tibia length. The concavity is best seen when the tibia is viewed dorsally ( Fig. 5 View Figs 3-8 ). The surface of the concavity is pale brownish in contrast to the yellow tibia. Hind tarsomere 1 not thickened and nearly as long as the following tarsomeres together.
Wing ( Fig. 2 View Fig ) hyaline, with pale brown veins. Only tip of vein R 1 and the section of the costa between R 1 and R 2+3 seamed brownish. Vein R 2+3 not distinctly bending up as usual, and reaching the costa in a wide angle; veins R 4+5 and M 1+2 gently diverging over their whole length and ending wide apart in costa, R 4+5 with only a weak undulation and with a gently upward flection before reaching costa. Apical section of M 1+2 with a weak undulation in basal third where the vein is weakly sclerotized. Upper crossvein (r-m) faintly sclerotized and ending much beyond middle in basal portion of vein M 1+2. Anal vein not present. Squama brown with numerous long pale hairs. Haltere completely white.
Abdomen shining black, but tergite 4 dull at sides. All hairs and bristles short, pale. Tergite 1 not sclerotized except for some lateral brown markings; tergite 4 long, black; tergite 5 short ( Fig. 2 View Fig ). Sternite 1 very short, but normally sclerotized; sternite 2 complete, rectangular, basally swollen with a dark central dot; sternite 3 apically concave; sternite 4 divided into two lateral, half-moon shaped sclerites; sternites 5, 6 and 7 complete, rectangular. Sternites 5 and 6 with a basal non-sclerotized spot.
Male terminalia ( Figs 6-8 View Figs 3-8 ) short, dark brown. Right and left cercus equally long, brown, rod-like enveloping the epiproct and connected to each other by a small bridge just below apex ( Fig. 7 View Figs 3-8 ). Left surstylus 1 almost as long as cerci with a long apical and several long subapical bristles. Surstylus 2 oval, a little pointed at apex ( Fig. 8 View Figs 3-8 ). Right epandrial lamella forked; dorsal apex pointed and densely set with long hair-like bristles ( Fig. 6 View Figs 3-8 , dfrel).
Female. Unknown. REMARKS. There is a high variability in the colouration of the legs. The hind femora are generally partly brown, but all femora can be entirely brown. The halteres are always white, at most dusky, but never black as in D. parilis , D. pusilla or D. exilis .
The cerci in D. pusilla are similar to those of D. bruscellensis sp. nov. in that they are rod-like and equally long. However there is no sclerotized connection between the apices of the cerci in D. pusilla ( Fig. 13 View Figs 12-14 ). The left surstylus 1 (ls1) is much shorter, black with a thick apical bristle ( Figs 13-14 View Figs 12-14 ). Surstylus 2 (ls2) is very large ( Fig. 14 View Figs 12-14 ) and unique in D. pusilla is also the row of bristles along the apical border of the left epandrial lamella.
In the preliminary key to the western European Drapetis species (GROOTAERT et al., 2010), D. bruscellensis sp. nov. runs to couplet 7 being a species with the cross veins r-m (upper cross vein) and m-m (lower cross vein) close together or in other words with the upper cross vein beyond the middle of the second basal cell.
Couplet 7 should be:
Species with white halteres .................................................................. D. bruscellensis sp. nov. Species with black (darkened) halteres ...............................all the other species under couplet 7
| RBINS |
Royal Belgian Institute of Natural Sciences |
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.