Paracycloneura apicalis Tonnoir

Jaschhof, Mathias & Kallweit, Uwe, 2009, The Cycloneura Marshall group of genera in New Zealand (Diptera: Mycetophilidae: Leiini), Zootaxa 2090, pp. 1-39 : 24-26

Paracycloneura apicalis Tonnoir in Tonnoir & Edwards 1927

( Figs 5 , 19 , 32 , 39 , 71–77 )

Tonnoir & Edwards 1927: 825 (description both sexes), plt. 61, fig. 62, plt. 62, fig. 73 (photos wing), plt. 75, fig. 238 (line drawing male terminalia).

Holotype. Male, Waiho [Westland, South Island], 21 Jan. 1922, A.L. Tonnoir leg. In NZAC (specimen seen).

Diagnosis. This species is distinguished from its congeners by the dark subapical fascia on the wing membrane ( Fig. 19 ) and in details of the male terminalia (see below under P. inopinata ).

Redescription. Male. Head. Fig. 32 . First and occasionally second antennal flagellomeres light. Node of fourth flagellomere 2.2–2.5 times as long as wide ( Figs 73, 76 ).

Wing. Fig. 19 . Length 2.4–3.0 mm. Membrane with dark subapical fascia, with some setae close to posterior margin.

Terminalia. Gonocoxites with setae of various sizes including 3 large ventromesal setae and 2 very long, pale setae on interior ventromesal margin; ventrobasal surface mesally with numerous tiny warts; apicoventral lobe with 6 lateral bristles and 2 large, pale setae, and 5 short, blunt apical macrosetae of which the most apical one is largest ( Fig. 74 ); mesal lobe long and narrow, with 1 large pale apical seta, 1 smaller pale mesal seta and 3 ordinary subbasal setae ( Fig. 75 ); apicodorsal gonocoxal lobe directed mesally, strongly flattened, with rasplike surface, comblike dark lamella on ventromesal margin, and 1 sabre-like, pointed macroseta dorsosubapically ( Figs 71, 72 ). Basal portion of gonostylus thick, with 2 mesal setae; apical portion slender, usually winding, with 1 fine subapical seta and some tiny setulae ( Figs 75 ). Aedeagus/paramere complex with subtriangular, sclerotized tegmen ( Fig. 77 ).

Remark. In their description of P. apicalis, Tonnoir and Edwards (1927: 825) mention “a male paratype from Cass [with] the wing-tip completely brownish”; this specimen, which we have not seen, should belong to our P. inopinata , or to even another Paracycloneura species not named here (see below).

Distribution and phenology. Endemic to NZ: SO (NN, BR, KA, WD). Confined to northern South Island. Adults, exclusively males, captured in beech and mixed podocarp/beech forests from November to February. A few specimens trapped in a beech tree crown in a height of 13.5 m.

Material studied. SO. BR: 2* males, L. Daniells Track 5 km E Springs Junction, 9 Nov. 2001, M. Jaschhof; KA: 3* males, Blue Duck Res., 24 and 31 Jan. 1991, R.K. Didham.

Figures

FIGURES 5 – 8. Specimens in lateral view. 5: Paracycloneura apicalis Tonnoir, male. 6: Tonnwardsia gen. et sp. n., male. 7: Tonnwardsia gen. et sp. n., female. 8: Cawthronia nigra Tonnoir, male.

FIGURES 19 – 25. Wings. 19: Paracycloneura apicalis Tonnoir, ventral view. 20: Paracycloneura inopinata sp. n., ventral view. 21: Tonnwardsia gen. et sp. n., ventral view. 22: Cawthronia nigra Tonnoir, ventral view. 23: Waipapamyia dentata sp. n., dorsal view. 24: Waipapamyia elongata sp. n., ventral view. 25: Waipapamyia truncata sp. n., ventral view.

FIGURES 30 – 33. Morphology of Leiini. 30: Head, in frontal view, of Cycloneura Marshall sp. 31: Head, in frontal view, of Tonnwardsia gen. et sp. n. 32: Head, in frontal view, of Paracycloneura apicalis Tonnoir. 33: Thorax, in lateral view, of Paradoxa fusca Marshall. Length of scale bar = 0.1 mm (for 30 – 32) and 0.25 mm (for 33).

FIGURES 38 – 39. Thorax, lateral view. 38: Tonnwardsia gen. et sp. n. 39: Paracycloneura apicalis Tonnoir. Length of scale bar = 0.25 mm.

FIGURES 71 – 79. Morphology in Paracycloneura spp., males. 71 – 77: Paracycloneura apicalis Tonnoir. 78 – 79: Paracycloneura inopinata sp. n. 71: Terminalia, dorsal view (0.1 mm). 72: apicodorsal lobe of gonocoxite, ventral view, apical macroseta broken (0.05 mm). 73: Flagellomere 4, lateral view (0.05 mm). 74: Terminalia, ventral view (0.1 mm). 75: Gonostylus, apicoventral and mesal lobes of gonocoxite, mesal view, mesal lobe broken and separate (0.1 mm). 76: Flagellomeres 1 – 5, lateral view (0.1 mm). 77: Aedeagus / paramere complex, ventral view, presumed aedeagus stippled (0.05 mm). 78: Gonostylus, apicoventral and mesal lobes of gonocoxite, mesal view (0.1 mm). 79: Aedeagus / paramere complex, ventral view, presumed aedeagus stippled (0.05 mm). a = apicodorsal lobe of gonocoxites, b = mesal lobe of gonocoxites, c = apicoventral lobe of gonocoxites, d = gonostylus, e = presumed tergite 9, f = presumed sternite 9, g = tegmen. Length of scale bar in parentheses.