Indascia spathulata
| Notice: | This page is derived from the original publication listed below, whose author(s) should always be credited. Further contributors may edit and improve the content of this page and, consequently, need to be credited as well (see page history). Any assessment of factual correctness requires a careful review of the original article as well as of subsequent contributions.
If you are uncertain whether your planned contribution is correct or not, we suggest that you use the associated discussion page instead of editing the page directly. This page should be cited as follows (rationale):
Citation formats to copy and paste
BibTeX: @article{Reemer2013ZooKeys288, RIS/ Endnote: TY - JOUR Wikipedia/ Citizendium: <ref name="Reemer2013ZooKeys288">{{Citation See also the citation download page at the journal. |
Ordo: Diptera
Familia: Syrphidae
Genus: Indascia
Name
Indascia spathulata Reemer sp. n. – Wikispecies link – ZooBank link – Pensoft Profile
Type specimens
HOLOTYPE. Adult male. VIETNAM. Label 1: “C. VIETNAM: Ha Tinh / Vu Quang N.P., 166 m, N 18° / 17'39"E 105°25'27", 24.ix. - / 5.x.2009, Mal. tr. 12, RMNH’09 / C. v. Achterberg & R. de Vries”; label 2: “Voucher code M. Reemer / 285 / DNA voucher labcode MZH:Y1100”. Coll. RMNH.
Diagnosis
Within Indascia, this species only shares the presence of an appendix on vein R4+5 with Indascia gigantica sp. n. From that species, Indascia spathulata differs by tergite 2 being more than twice as long as wide, and the basoflagellomere being 5 times as long as wide.
Description (based on holotype)
Adult male. Body size: 6 mm.
Head. Face occupying slightly less than 1/3 of head width in frontal view; black; entirely silvery white pilose. Gena black, white pilose. Oral margin not produced. Frons and vertex black; yellowish white pilose, except for few black pile at ocellar triangle. Occiput black; black pilose dorsally, yellowish pilose laterally and ventrally. Eye bare. Antennal fossa about as high as wide. Antenna black; basoflagellomere with dorsal margin somewhat concave; antennal ratio approximately as 5:1:9.
Thorax. Thorax black, except postalar callus and postpronotum yellowish brown and ventral pleurae brown. Mesoscutum black pilose, except yellow pilose laterally. Postpronotum and postalar callus yellow pilose. Scutellum semicircular, without calcars; yellow pilose. Anepisternum weakly sulcate; dorsal 3/5 yellowish pilose, ventral 2/5 bare. Anepimeron entirely long yellowish white pilose. Katepisternum long white pilose dorsally, bare ventrally. Katatergum long microtrichose, anatergum short microtrichose. Calypter greyish. Halter yellowish white.
Wing: Hyaline; microtrichose, except bare on cell sc, basally on cell r1 along vein Rs, basal 1/2 of cell br, basal 3/4 of cell bm, anteriorly on cell cup along vein CuA.
Legs: pale yellow, except blackish brown on basal 1/3 of front, basal 3/4 of mid and most of hind femur (except extreme base and apex yellow in the latter), and distal 2/3 of hind tibia; yellow pilose, except black pilose on 4th and 5th tarsomere of front and mid leg, and on dark parts of hind femur and tibia. Coxae blackish brown; yellow pilose. Trochanters yellow; yellow pilose.
Abdomen. Tergites black, except anterior 1/4 of tergite 3 yellow and narrow anterior margin of tergite 4 yellow. Tergites 1 and 2 white pilose. Tergite 3 white pilose on yellow part, black pilose on black part. Tergite 4 black pilose, except white pilose in anterolateral corners and along posterior margin. Sternites black, except sternite 3 yellow on anterior 1/4. Sternite 1 bare. Sternite 2 white pilose. Sternite 3 white pilose on yellow part and along lateral margins. Sternite 4 black pilose, except white pilose along anterior margin. Male genitalia as in Fig. 118.
Female. Unknown.
Etymology
Even more so than its congenerics, this species has a spoon-shaped abdomen, due to the strongly constricted second segment. This character inspired its name: spathulata (Latin adjective for ‘spatulate’, spoon-shaped).
Original Description
- Reemer, M; Ståhls, G; 2013: Generic revision and species classification of the Microdontinae (Diptera, Syrphidae) ZooKeys, 288: 1-213. doi
Images
|
