Asiobaccha aquila Thompson &amp; Mengual, sp. nov.
Creators: name: Mengual, Ximo
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Syrphidae
Asiobaccha
Asiobaccha aquila

description: <i>Asiobaccha aquila</i> Thompson &amp; Mengual sp. nov. (Figure 4a, b, e) <i>Description</i> <i>Male: Head.</i> Face with distinct facial tubercle, dark brown becoming orangish-yellow medially, densely silver pollinose, yellow pilose ventrally and black pilose dorsally (Figure 4e); gena dark brown to black with oral margin paler; lunule yellow, yellow also between antennal bases; frons protruded forward, black with anterior M-shaped yellow macula, black pilose, golden-brownish pollinose posteriorly, shiny black medially; vertical triangle narrow, isosceles (more than four times as long as broad), with the ocelli on the anterior half, black, black pilose; antenna orangish-yellow, black pilose; arista dark brown, bare; eye bare, holoptic; occiput black, grey-silver pollinose, yellowish-white pilose on ventral 2/3 and black pilose on dorsal 1/3. <i>Thorax.</i> Scutum black, scarcely brown pollinose, yellow pilose; mesonotal fringe or collar well-defined on anterior part of scutum, with pale pile; postpronotum dark, bare; notopleuron black, densely yellowish-white pollinose, yellow pilose; postalar callus lighter in background colour; scutellum black, yellow pilose, with brown pollinose fascia on anterior margin, subscutellar fringe almost absent (Figure 4a, b). Pleuron mostly black, except posterior anepisternum lighter in background colour on posterior half, katepisternum with dorsal macula lighter in background colour, both areas densely yellowish-white pollinose; katatergum also whitish pollinose; anterior anepisternum yellow pilose on posterodorsal quarter, posterior anepisternum and meron yellow pilose, dorsal and ventral katepisternal pile patches broadly separated, metaepisternum yellow pilose ventrad to spiracle; metasternum bare; calypter dark yellow; plumula yellow; halter brown; posterior spiracular fringes yellow. <i>Wing</i>: membrane dark, infuscated, except basally and apically; stigma brown; extensively microtrichose, except cell R bare basal to vein RS, cell BM bare on basal 1/2, and cell CuP and anal lobe bare basally. Alula present, broader than costal cell, bare with microtrichia on anteroapical quarter. <i>Legs</i>: coxae and trochanters black, pro- and mesoleg yellow, yellow pilose; metafemur yellow but somewhat dark apically, metatibia and metatarsus black. <i>Abdomen.</i> Petiolate, unmargined. Dorsum mainly black, yellowish-white pilose on terga 1 and 2, black pilose on the remainder; tergum 1 black; tergum 2 with two basolateral yellow maculae and lateral margins lighter; tergum 3 with two medial yellow subtriangular maculae on anterior half; terga 4 and 5 black (Figure 4a, b); male genitalia black. <i>Female.</i> Similar to male except for normal sexual dimorphism and as follows: face white pilose; frons black, with bluish iridescence medially, with anterior M-shaped yellow macula; frons white pilose, white pollinose. <i>Variation.</i> Colouration of the metafemur is variable; some specimens have metafemur dark on apical 2/3 and other specimens have it mostly yellow. <i>Length (N = 4).</i> Body, 11.0 <i>–</i> 16.0 (13.9) mm; wing, 9.5 <i>–</i> 13.0 (11.3) mm. <i>Geographical distribution</i> Species known from the Philippines. <i>Etymology</i> The specific epithet is derived from the Latin <i>aquilus</i> meaning dark coloured, blackish (Brown 1956, p. 148). Species epithet is to be treated as adjective. <i>Differential diagnosis</i> Species with a broad alula, mostly bare, with terga 1 and 4 black, mesonotal fringe present and an infuscated wing. Similar to <i>A. bimaculata</i> and <i>A. nubilipennis</i>, but <i>A. aquila</i> has the metatarsus entirely dark and the scutellum black. The face is bright yellow for most <i>A. bimaculata</i> and <i>A. nubilipennis</i>, but it is a bit darker in <i>A. aquila</i>. <i>Type locality</i> Philippines: Luzon Island, Cordillera Administrative Region, Ifugao Province, Liwo, 8 km East from Mayoyao, 1000 <i>–</i> 1300 m, 16°58 <i>′</i> N, 121°13 <i>′</i> E. <i>Material examined</i> <i>Type material.</i> <i>Holotype</i>, male, deposited in the Bernice P. Bishop Museum (Honolulu, Hawaii, USA) and labelled: <i>‘</i> PHILIPPINES // Ifugao Prov., Liwo // 8 km E Mayoyao, 1000- // 1300 m, 25.V.1967 <i>’</i>, <i>‘</i> H.M. Torrevillas // Collector // BISHOP MUSEUM <i>’</i>, <i>‘ Episyrphus</i> // <i>sp. 74–26</i> // Det. // FCThompson <i>74’</i>, <i>‘</i> USNMENT // 00890779 <i>’</i> [barcode] <i>‘</i> HOLOTYPE // <i>Asiobaccha</i> // <i>aquila</i> // <i>des. X. Mengual 2014’</i> [red] (specimen photographed). <i>Paratypes</i>: PHILIPPINES: Ifugao Prov., Liwo, 8 km east from Mayoyao, 1000 <i>–</i> 1300 m, H.M. Torrevillas [1&amp;male;, ZFMK, USNMENT 00890797];..., Mayoyao, 1000 <i>–</i> 1500 m, 6 July 1966, H.M. Torrevillas [1&amp;female;, BPBM]; Mindanao Island, Bukidnon Prov., Mt. Katanglad,, 1250 m, 4 <i>–</i> 9 December 1959, L.W. Quate [1&amp;male;, USNM, USNMENT 00890773]; Luzon Island, Camarines Sur Prov., Mt. Isarog, Pili, 600 <i>–</i> 800 m, 10 April 1965, H. M. Torrevillas [1&amp;male;, BPBM, USNMENT 00890811]; Luzon Island, Bataan Prov., Limay, R.C.M. McGregor [1&amp;female;, USNM, USNMENT 00891196]; Negros Oriental Prov., Mt. Talinas, 900 m, 29 June 1958, H.E. Milliron [1&amp;female;, BPBM, USNMENT 00890782]; Laguna Prov., Los Baños, March 1917, F.X. Williams [1&amp;female;, USNM, USNMENT 00890765]; Nueva Vizcaya Prov., Santa Fe, Imugan, 30 <i>–</i> 31 May 1987, C.K. Starr [1&amp;female;, USNM, USNMENT 00890810; 1&amp;female;, ZFMK, USNMENT 00890786]. <i>Remarks</i> Some specimens were identified as <i>Episyrphus 74–26</i> Thompson, in litt.
description: Published as part of <i>Mengual, Ximo, 2016, A taxonomic revision of the genus Asiobaccha Violovitsh (Diptera: Syrphidae), pp. 2585-2645 in Journal of Natural History 50</i> on pages 2594-2596, DOI: 10.1080/00222933.2016.1206634, http://zenodo.org/record/3994636
description: {"references": ["Brown RW 1956. Composition of scientific words a manual of methods and a lexicon of materials for the practice of logotechnics. Baltimore: Published by the author."]}