Allograpta jacqi Mengual & Ramage
Ramage, Thibault, Charlat, Sylvain & Mengual, Ximo, 2018, Flower flies (Diptera, Syrphidae) of French Polynesia, with the description of two new species, European Journal of Taxonomy 448, pp. 1-37: 10-11
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|Allograpta jacqi Mengual & Ramage|
Allograpta jacqi Mengual & Ramage sp. nov.
Species with face medially black, yellow laterally, scutum and scutellum black, and abdomen black with lateral small yellow maculae on terga 1–5. Easy to distinguish from other species of Allograpta by the general dark coloration.
The specific epithet refers to the family name of the first collector of the species, Fred Jacq, a great naturalist and photographer. The species epithet is to be treated as a noun in the genitive case.
FRENCH POLYNESIA: ♂, Tahiti Island , Mont Marau, 1400 m a.s.l., 17°36′44.02″ S, 149°31′51.10″ W, genitalia in microvial, “ FRENCH POLYNESIA: // Society Islands, Tahiti, // Mont Marau, 1400 m., // 27.VIII.2017. // Leg. T. Ramage & F. Jacq // PF1494”, “DNA voucher specimen // ZFMK Lab code // JH13 // Bonn, Germany”, “ZFMK-DIP // 00026906” [barcode], “ HOLOTYPE // Allograpta // jacqi // Det. X. Mengual 2017 ” [red] ( ZFMK).GoogleMaps
LENGTH (N = 1). Body 10.5 mm; wing 9.0 mm.
HEAD ( Figs 3DView Fig, 6C, EView Fig). Face with a distinct tubercle, shiny, yellow with a medial broad black vitta, which does not reach oral margin, and two small black maculae on eye margin, yellow pilose with some black pile laterally and dorsally; gena black; lunule black; frons shiny black, with two small yellow maculae on eye margin at level of antennal insertion, black pilose; vertical triangle black, black pilose; antenna dark, black pilose; arista bare; eye bare, holoptic; occiput dark, covered with thick silver pollinosity on ventral ¾, silver-white pilose on ventral ¾ and black pilose on dorsal ¼.
THORAX ( Figs 2BView Fig, 3CView Fig, 6View Fig C–D). Scutum shiny, black with small yellow markings on posterior notopleuron and posterior postpronotum, with relatively long yellow pile with some abundant black pile; scutellum shiny black with long yellow and black pile, subscutellar fringe with long dark pile. Pleuron black, except posterior anepisternum yellow on posterior ½ and katatergum with a yellow macula, mostly shiny with some pale pollinosity anteriorly, yellow pilose; metaepisternum bare; metasternum with long yellow pile; calypter pale basally, darker apically, with dark pile; plumula long, yellow; halter yellow; posterior spiracular fringes yellow.
WING. Infuscated, brownish, microtrichose, except cell c bare on basal ¼, cell r1 bare before bifurcation, cells r and bm bare on basal ½, cell cup bare on basal ¼–½. Alula bare on basal ½.
LEGS. Coxae and metatrochanters dark; pro- and mesofemora yellow with a dorsal dark area; pro- and mesotibiae yellow with a medial dark annulus; pro- and mesotarsi black; metaleg black; black pilose with some yellow pile on metacoxa.
ABDOMEN ( Figs 2BView Fig, 6DView Fig). Parallel-sided, unmargined. Entirely black, except tergum 1 yellow laterally and terga 2–5 black with small triangular yellow maculae close to lateral margin, shiny except terga 2–4 with a large black pollinose area medially, mostly black pilose except tergum 1 yellow pilose laterally, and terga 2 and 3 yellow pilose anterolaterally; sterna black, yellow and black pilose.
MALE GENITALIA. Small, as in Fig. 8View Fig D–F.
Species only known from Tahiti ( French Polynesia).
Status in French Polynesia
This is a singular species due to its body coloration, without the common yellow fasciae of other species of the genus Allograpta and the with scutellum entirely shiny black. The Australian species of this genus were reviewed by Mengual & Thompson (2015), but a broader systematic revision is needed for the Australasian and Oceanian Regions (see Mengual et al. 2009).
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