Minjerribah Bickel, 2019

Bickel, Daniel J., 2019, Minjerribah (Diptera: Dolichopodidae), a new genus from coastal Queensland, Australia, Zootaxa 4686 (4), pp. 593-599 : 594

Minjerribah Bickel , gen. nov.

Type species. Minjerribah litoura Bickel sp. nov., here designated.

Etymology. Minjerribah is the name for North Stradbroke Island given by its traditional custodians, the Quandamooka people. The gender is feminine.

Diagnosis. Genus Minjerribah (this generic diagnosis is based on a single species and emphasizes characters considered to be of generic importance). Body length about 4.0 mm; wing: 3.8 x 1.6 mm. Head. Slightly wider than high in anterior view; pair distinct converging postvertical setae on dorsal postcranium, not in line with postocular setae; pairs of vertical and diverging ocellar setae present; lower face and clypeus wide, and clypeus distinctly tectiform in both sexes; scape bare; pedicel with conus protruding into socket-like postpedicel, evident in both median and lateral views of both sexes; postpedicel lobate and rounded, with dorsal arista comprised of short basal article and long distal article. Thorax. Acrostichal setae totally absent; 5 strong dc present, decreasing in size anteriorly; median scutellar setae strong, lateral scutellar seta about one-quarter length of median seta; proepisternum just dorsad of coxa I with strong curved seta. Legs. FI bare; TI with strong ad, dorsal and pv setae; FII with strong anterior and posterior preapical setae at 4/5; TII with strong ad, dorsal, and ventral setae; FIII with only strong anterior seta at 4/5 and with two short av setae distally; TIII with strong ad, dorsal and ventral setae and double posterior row of some 12–15 irregular setal pairs along length. Wing. Rather broad; membrane hyaline; R 2+3 ending in costa near 9/10; R 4+5 and M diverging from base, and bowed with respect to each other beyond dm-cu crossvein, but subparallel apically with R 4+5 joining costa anteriad of apex, and M joining posteriad of apex; vein M with flexion or bosse alaire halfway between join with dm-cu and apex. Abdomen. Tergites 1–5 wide and rounded, not dorsoventrally flattened; segments 6, 7, 8 and hypopygium mostly retracted under tergite 5 at rest and devoid of setae; tergite 6 bare, short and weak, almost entirely retracted under segment 5; segment 7 bare, reduced to narrow band with sternite 7 attached to ovate sternite 8; epandrium rounded, subrectangular; surstylus short, lobate and fused with epandrium ( Figs 1 , 4 ); cercus short, lobate; female oviscapt with tergites 9+10 (sensu Capellari 2018) divided into two acanthophorites, each bearing 4 pointed spines ( Fig. 3 ).

Figures

FIGURES 1–3. Minjerribah litoura sp. nov.: 1, male head, anterior; 2, male postabdomen, extended, left lateral; 3, female postabdomen, left lateral. Legend: cer, cercus; st, sternite, sur, surstylus, tg, tergite. Scale bars: 1, 0.2 mm; 2–3, 0.1 mm.

FIGURES 4–5. Minjerribah litoura sp. nov.: 4, male habitus, left lateral (note protruding cercus); 5, head and thorax, left anterior. Legend: cer, cercus. Scale bars: 4, 1.0 mm; 5, 0.2 mm.