Furcantenna malayana, Reemer, 2020

Reemer, Menno, 2020, A third species of the rarely collected Oriental hoverfly genus Furcantenna Cheng, 2008 (Diptera, Syrphidae, Microdontinae), ZooKeys 989, pp. 73-78 : 73

Furcantenna malayana sp. nov. Figures 1-8

Material.

Holotype: Malaysia. • 1 ♀, holotype of Furcantenna malayana sp. nov.; SE of Ipoh; alt. 50 m; 10 Oct. 1962; E.S. Ross & D.Q. Cavagnaro leg.(CAS).

Label 1: "MALAYA: 3 mi. / SE. Ipoh / 50m VII-10-62"; label 2: "Collectors: / E.S. Ross / D.Q. Cavagnaro".

Diagnosis.

Furcantenna malayana is the only known species of the genus with a partly yellow face and vertex, and a bare metasternum. The whitish apical half of the wing is also characteristic.

Description.

Adult female. Body length: 9 mm (Fig. 1 ).

Head. Face occupying slightly more than 1/2 of head width in frontal view; yellow medially, dark brown laterally; silvery white pilose. Oral cavity with lateral margins not produced. Frons medially yellow, bare; laterally dark brown, golden yellow pilose. Vertex swollen; yellow, except brown around ocellar triangle; yellow pilose. Occiput dark brown; yellow pilose. Eye bare, except for a few scattered, very short pile, only visible under high magnification (Fig. 4 ). Antennal socket about 1.5 × as high as wide. Antenna brown; ratio of scape:basal flagellomere approx. 1:2.1; basal flagellomere swollen at apical 1/4, appearing club-shaped, with apex approx. twice as wide as base. Arista yellowish, about 3/4 as long as basal flagellomere (Fig. 3 ).

Thorax. Postpronotum yellowish brown; yellow pilose. Mesoscutum brown, quite pale along margins and more blackish in middle; golden yellow pilose in anterolateral corners and along posterior margin, leaving a black pilose area in the shape of an upside-down letter T in between (Fig. 5 ). Postalar callus yellowish brown; yellow pilose. Scutellum without calcars, with shallow apicomedian sulcus; pale brown; black pilose (Fig. 6 ). Pleuron brown. Anterior and posterior part of anepisternum divided by a weak sulcus; almost entirely yellow pilose, except bare on narrow strip along dividing sulcus and on small ventral part. Anepimeron on anterior part with mixed yellow and black pile, other parts bare. Katatergum and anatergum long and short microtrichose, respectively. Katepisternum dorsally whitish pilose, ventrally bare. Katepimeron white pilose. Metasternum bare (except for dark microtrichia). Mediotergite dark brown; shining, except narrowly microtrichose anteriorly and on rudimentary subscutellum. Calypter grey. Halter pale yellow.

Wing. Brown in basal half, whitish in apical half (Fig. 7 ). Microtrichose, except bare on posterobasal 1/2 of cell br.

Legs. Pale brown, except hind femur and tibia darker brown; black pilose, except ventral surface of tarsi yellow pilose. Hind tibia strongly swollen, widest in the middle, with dorsal pile much longer than on other parts of the legs (Fig. 2 ). Coxae and trochanters brown; black pilose.

Abdomen. Pale brown (Fig. 8 ). Tergites short pilose: tergite 1 yellow pilose; tergite 2 black pilose except yellow pilose along anterior margin; tergite 3 black pilose; tergites 4 and 5 yellow pilose. All sternites yellow pilose.

Etymology.

The specific epithet is an adjective which refers to Malaysia, the country where the species was collected.

Distribution.

Only known from Peninsular Malaysia (Fig. 9 ).

Figures

Figure 9. Known localities of Furcantenna species.

Figures 1 - 8. Furcantenna malayana sp. nov., female, holotype 1 habitus dorsal 2 habitus lateral 3 head frontal 4 head lateral 5 thorax dorsal 6 scutellum dorsal 7 wing 8 abdomen dorsal.