Arcyphysa fraserensis, Wells & Contents, 2018

Wells, Alice & Contents, Arturs Neboiss Table Of, 2018, Australian Diplectroninae reviewed (Insecta: Trichoptera), with description of 21 new species, most referred to a new genus, Zootaxa 4415 (1), pp. 1-44 : 29

Arcyphysa fraserensis sp. nov.

( Figs 108–109 )

Material examined. Holotype ♂, Queensland , Fraser Island, 3 km W Central Station, 20.xii.1979, K.J. Lambkin (QM [TRI-39436]).

Paratypes. Queensland : 2♂, Camp Mile, Cooloola, Banksia -dominated open forest, 28.viii.1970, E. Dahms [PT-1014] ; 2♀, Fraser Island , Lake Wabby, 10–18.xii.1975, Bensink & Burton (QM) ; 1♀, same loc., 19.xi.1976, Thompson & Rice (QM); 1♀, Fraser Island , Coomboo Lake, south bank, 31.viii.1979, K.J. Lambkin (QM) ; 1♂ 1♀, Fraser Island , Pile Valley, nr Central Station, at light, 18.xii.1979, K.J. Lambkin (QM [PT-1125, PT-1050; TRI- 39403]).

Other material examined. Queensland: 2♂, Upper Logan, Feb. 1963, K. Korboot, emerged in captivity (UQ) ; 2♂ 1♀, Tamborine Mtns , Mar. 1963, MV lt, K. Korboot ; 3♂ 4♀, Seary’s Creek , Cooloola NP, Rainbow Beach, 15°58'S 153°04'E, 9.ii.1987, G. Theischinger ; 1♂, Camp Milo Cooloola , at light, Banksia dom. open forest, 28.viii.1970, E. Dahms (QM).

Diagnosis. This species is similar to D. hystricosa in having each harpago sickle-shaped in ventral view, but differs by having extensions on the anterolateral margins of tergite X in ventral view truncate apically, appearing somewhat ‘winged’; and in lateral view having a spine on each mesolateral margin of segment IX directed downward, not upward. The female is indistinguishable from that of D. hystricosa .

Description. Length of each forewing: ♂ 6.7–6.9 mm (n = 2), ♀ 7.7.mm (n = 1).

Male ( Figs 108–109 ). Genitalia: In lateral view, abdominal segment IX with wide, U-shaped median excision, anterolateral angles bluntly rounded and densely covered with short, stout spicules, truncate in ventral view; group of bristles located on outer margin on each side, and down-turned spiny process on mesolateral margin situated just below phallic apparatus; tergite IX/X hood-shaped medially, lateral margins covered with scattered groups of short peg-like spines, apicolateral processes in ventral view apically truncate, projecting laterad; in lateral view terminating in finger-like lobe; gonopods in ventral view each with coxopodite stout, broadest at base, slightly curved, harpago short, broadly sickle-shaped in ventral view; phallic apparatus without parameres, almost straight.

Female. Abdomen terminating bluntly; pair of cerci and both pairs of terminal protuberances small; sternite VIII formed by 2 ventrolateral plates fully divided mesally, covering inferior appendage receptacle grooves, distal margins deeply and widely excised; apicolateral angles produced distally in wide setose lobes.

Distribution. Known from several sites on Fraser Island off the coast of south-eastern Queensland and also from several other south-eastern Queensland localities.

Figures

FIGURES 102–109. Arcyphysa gen. nov. spp., diagnostic features.102–103, Arc.diamontona sp. nov., Vic., Diamond Creek, 7 km SE of Gembrook [PT-1006], ♂: 102, right fore- and hind wings, dorsal, 103, maxillary palp. 104–109, ♂ genitalia. 104– 105, Arc. angusta (Banks 1939; NSW, Styx R. [PT-1005]): 104, ventral, and 105, left lateral. 106–107, Arc. diamontona sp. nov. [PT-1006]:106, ventral, and 107, left lateral.108–109, Arc.fraserensis sp. nov. (Qld, Fraser Island, Pile Valley, nr Central Station [PT-1125]):108, ventral,and 109, leftlateral.Scale bars: Fig.102 = 1 mm; Fig.103 = 0.5 mm.Abbreviations:ac= anal cell; alp = apicolateral process; A 1+2+3 = fused anal veins A 1, A 2, A 3;dc = discoidal cell; cox = coxopodite; fI, fII, fIII, fIV, fV = forks I–V; mc= median cell; har = harpago; ph = phallic apparatus; IX, X = abdominal segments IX, X