Megaselia lacunitarsalis, Fang, Hong & Liu, Guangchun, 2015
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publication ID |
https://doi.org/ 10.11646/zootaxa.3999.1.9 |
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publication LSID |
lsid:zoobank.org:pub:01EE872E-EA26-44AF-92C0-06DD33A8C540 |
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DOI |
https://doi.org/10.5281/zenodo.6122060 |
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persistent identifier |
https://treatment.plazi.org/id/482587EA-FFD8-3214-FF2B-D298FE611347 |
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treatment provided by |
Plazi |
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scientific name |
Megaselia lacunitarsalis |
| status |
sp. nov. |
Megaselia lacunitarsalis View in CoL , sp. nov.
( Figs. 7–13 View FIGURES 7 – 13 )
Description. Male. Body length 2.2–2.5 mm.
Head ( Fig. 7 View FIGURES 7 – 13 ). Frons black, width about 0.3 mm, broader than long (1.8:1), with about 40 hairs and a distinct median furrow. Lower supra-antennal bristles short, about 1/2–2/3 as long as upper pair and closer from each other than upper pairs. Pre-ocellars obviously farther from each other than upper supra-antennals. Antials closer to antero-laterals than to upper supra-antennal bristles and slightly lower than antero-laterals. Pre-ocellars lower on frons than medio-laterals, and the four bristles in equal distance. Postpedicels black and without SPS vesicles. Arista obviously longer than frons width. Palps slender, yellow and with strong bristles.
Thorax ( Fig. 8 View FIGURES 7 – 13 ). Thorax black or dark brown. Mesopleuron with uniform hairs. Notopleuron with 3 bristles and no cleft. Scutellum with a posterior pair of bristles and an anterior pair of hairs.
Legs ( Figs. 9–11 View FIGURES 7 – 13 ). Fore legs yellow or yellowish brown, the last tarsal segments dark brown. Middle and hind legs brown, hind femur darkened at tip. Fore metatarsus dilated, base of the ventral edge conspicuously narrowed. Fore-tarsal segments 2–5 wide and round, the last tarsal segment obviously wider and longer than segment 4. Dorsal hair palisade of mid tibia extends 0.5 of its length. Hairs below basal half of hind femur stout and densely crowded, slightly shorter than those of anteroventral row of outer half. Hind tibia with fine posterodorsal hairs and without anterodorsal hairs.
Wings ( Fig. 12 View FIGURES 7 – 13 ). Wings slightly yellowish brown, with yellowish brown or brown veins. Costal index about 0.5. Costal ratios 2.6:1.9:1. Costal cilia 0.17–0.19mm. Vein Sc fades away before reaching R1. Base of vein Rs with 1 minute hair, which shorter than vein R2+3. Axillary ridge with 4 bristles. Halteres black or brown.
Abdomen ( Fig. 13 View FIGURES 7 – 13 ). Abdominal tergites dark brown or black, but venter brown. Tergites with sparse hairs, which are longer and bristle-like at sides and hind margins of tergites 2–6. Tergites 2–6 subequal in length. Venter with fine hairs below on segments 3–6. Hypopygium dark brown, with yellowish brown anal tube. Each side of epandrium with some bristle-like hairs. Posterior lobes of hypandrium vestigial. Anal tube short, with fine hairs at tip which no longer than the longest hairs of cerci.
Female: unkown.
Type material. Holotype: male, Mt. Changbai, Jilin Province, China, 2-VIII-2003, Fang Hong. Paratypes: 14 males, same data as holotype.
Distribution. China (Jilin).
Etymology. The specific name refers to the base of fore metatarsus with a conspicuous notch.
Remarks. The new species could be easily distinguished from other species of Megaselia by the base of fore metatarsus with a conspicuous notch. In the key of Schmitz & Beyer (1965) M. lacunitarsalis will run to M. furva Schmitz at couplet 88 of Group IV. However, the latter with equal supra-antennal bristles and lower supra-antennal bristles vertically below upper pair. In the key to British Megaselia ( Disney, 1989) this species runs to M. unguicularis (Wood) at couplet 126. Both species with short anal tube, but left side of epandrium of the latter with more than 10 bristles.
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.