Drapetis abrollensis, Michelsen & Grootaert, 2019
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publication ID |
https://doi.org/ 10.11646/zootaxa.4624.3.11 |
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publication LSID |
lsid:zoobank.org:pub:2F12876C-2DA7-4452-9200-65F4BE1EC243 |
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persistent identifier |
https://treatment.plazi.org/id/BA913310-D251-4F8F-8024-92A3E506415B |
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taxon LSID |
lsid:zoobank.org:act:BA913310-D251-4F8F-8024-92A3E506415B |
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treatment provided by |
Plazi |
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scientific name |
Drapetis abrollensis |
| status |
sp. nov. |
Drapetis abrollensis sp. nov.
( Figs 1 View FIGURE 1 A–D, 2B, 3C, 4A–D)
Material examined. HOLOTYPE ♂, SWEDEN: Skåne: Åbrolla, Osby (56°26′N 14°08′E), 142 m, 11–13.vi.2016, leg. V. Michelsen ( NHMD) GoogleMaps . Holotype condition: micro-pinned from the left and staged; abdomen dissected (middle segments missing); dissected parts stored in glycerin in a microvial with the specimen; right postpedicel, right wing and right midleg missing; left midleg glued separately on the stage.
Etymology. The species epithet is derived from the name of the type locality, Åbrolla.
Diagnosis (male): Radial medial crossvein (r-m) lying distinctly beyond middle of basal medial cell (bm) ( Fig. 2B View FIGURE 2 ). Antenna brownish black; pedicel beneath with short distal setulae; postpedicel subtriangular, slightly longer than wide. Prothorax except on epimeron greyish pruinose; proepisternum without upturned seta. Halter blackish on knob. Legs light brownish. Mid femur simple except for subapical field of scaly cuticle ( Figs 4 View FIGURE 4 A–B). Mid tibia ventrally expanded and compressed ( Fig. 3C View FIGURE 3 ), at ventral edge bearing numerous cuticular denticles ( Figs 4A, C View FIGURE 4 ); posterior side of tibia with a longitudinal impression ( Fig. 3C View FIGURE 3 ). Apical margin of right epandrial lamella with two narrow projections ( Fig. 1A, p1 View FIGURE 1 , p 2 View FIGURE 2 ).
Description. Male. Small sized: wing length 1.3 mm (n = 1). Head: Black in ground-colour, shiny through thin grey pruinosity. Frons narrowed downwards; face linear, narrower than frons, widening immediately above clypeus. All setulae and setae on head and antennae dark, on palpi and labella pale yellowish. Anterior ocellars shorter than postpedicel, crossing; median ocellars same size, diverging. Pair of long, convergent (inner) vertical setae flanked by two convergent pairs of postocular setae. Occiput densely set with setulae, on postgena with pair of fine setae. Antenna brownish black, ventro-apical setulae on pedicel shorter than length of pedicel; postpedicel slightly longer than wide, subtriangular, with apical stylus about 2.2 times as long as remaining antenna. Thorax: Extensively shiny black, except grey pruinose on prothorax other than on proepimeron, scutellum and upper margins of anepisternum. No upturned seta on proepisternum. Mesonotum densely set with setulae; acrostichals not distinct from surrounding setulae. Prominent setae: a pair of prescutellar dorsocentrals, 4 notopleurals, 2 pairs of scutellars, apical pair longer and crossing. Wing: Hyaline, with brown veins ( Fig. 2B View FIGURE 2 ). Vein R 2+3 almost parallel with vein R 4+5 on basal half; vein R 4+5 slightly sigmoid before joining costa well before wing apex; M 1 curved on basal part but straight on distal half, meeting costa only slightly posterior of wing apex. Distance between cross-veins r–m and bm–m 0.6 times length of basal portion of vein M 1 and 0.35 times length of apical section of vein Cu. Calypter brownish black with long, dark marginal setae. Halter knob blackish, pale yellowish on stalk. Legs: Light brownish. Chaetotaxy mainly consisting of short pale setulae; even few setae pale yellowish, except for some relatively strong, dark anterior setae on mid coxa. Fore femur stout, decidedly thicker than mid femur, slightly thicker than hind femur. Anterior surface of mid femur simple except for subapical field of scaly cuticle ( Figs 4A, B View FIGURE 4 ). Mid tibia ventrally crest-like expanded ( Fig. 3C View FIGURE 3 ), with numerous cuticular denticles along ventral edge spreading onto anterior surface ( Figs 4A, C View FIGURE 4 ). Hind femur distinctly curved outwards. Hind tarsomere 1 slightly swollen, as long as combined length of hind tarsomeres 2–4. Abdomen: Basal sclerites brownish black, rather shiny through thin pruinosity. Tergite I not sclerotized, sternite I very short. Middle part of preabdomen destroyed during dissection. Male terminalia ( Figs 1 View FIGURE 1 A–D): Right sursty- lus fused with right epandrial lamella; right epandrial lamella with 2 projections (p1, p2) from apical border ( Figs 1A, B View FIGURE 1 ). Cerci ( Fig. 1B View FIGURE 1 ) fused mediodistally, tips of smaller right cercus (rc) and larger left cercus (lc) still clearly indicated. Left epandrial lamella (lel) fused with hypandrium (hy), with 5 setae on apical border ( Fig. 1B View FIGURE 1 ). Left surstylus 1 (ls1) pale brown, only with a few small ventral setae ( Figs 1B, C View FIGURE 1 ). Left surstylus 2 (ls2) large, enveloping apical part of left epandrial lamella (lel), with median apical projection bearing distinct apical seta ( Fig. 1C View FIGURE 1 ). Tip of hypandrium bearing stout black seta at tip ( Fig. 1D View FIGURE 1 ). Ejaculatory apodeme (ej) arising from long ventral apodeme ( Figs 1B, D View FIGURE 1 ).
Taxonomic notes. The close-set cross-veins r–m and bm–m assign Drapetis abrollensis sp. nov. to the D. exilis -group as defined by Chvála (1975). The anterior surface of the male mid femur is lacking a longitudinal field of vertical ribs or furrows and has a normal cover of fine setulae. Within the exilis -group a simple mid femur is also seen in males of D. completa Kovalev , D. incompleta Collin and D. stackelbergi Kovalev. Drapetis abrollensis sp. nov. is to our knowledge the only species of the D. exilis -group reported to have the mid tibia modified in the male sex.
Distribution. Drapetis abrollensis sp. nov. is known so far only by the male holotype from the province of Skåne in South Sweden.
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.