Arcyphysa nebo, 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 : 38

Arcyphysa nebo sp. nov.

( Figs 143–145 )

Material examined. Holotype ♂, Queensland, Mt Nebo , 13.xii.1959, J Kerr ( NMV [TRI-39427]).

Paratypes, Queensland: 1♂, data as for holotype ( NMV [PT-1096; TRI-39433]) ; 3♂, Branch Creek, Brisbane River , catchment, 26°52'S 152°41'E, 25.x.1993 ( NMV [TRI-39424]) ; 2♂, Branch Creek, Brisbane River , catchment, 26°52'S 152°41'E, 20.xii.1993 ( NMV [TRI-39420]).

Other material examined. 1♂, Papua New Guinea, Port Moresby, Feb. 1963, K. Korboot [TRI-54709].

Diagnosis. Most closely similar to D. volsella with which it shares the feature on abdominal segment IX of long lateral extensions that are gradually tapered to acute apices and of undivided harpagones, but in this species the processes are irregularly curved, not sharply twisted, each has a band of dense setae along its length, not just on the terminal 1/3, and the harpagones and coxopodites are approximately equal in length, whereas in D. volsella , the harpagones are about 1/3 length of the coxopodites.

Description. Male. Length of each forewing: 6.3–6.5 mm (n = 2).

Genitalia ( Figs 143–145 ): Abdominal segment IX in lateral view not clearly demarcated from tergite X, midlaterally with long slender irregularly curved process extending on each side well beyond apex of tergite X, densely setose along ridge extending almost full length of process; gonopods with coxopodites and harpagones approximately equal in length, in lateral view coxopodites subrectangular, harpagones undivided, slightly tapered distally to rounded apices; phallic apparatus without parameres, stoutest in midregion, narrowed towards apex, in lateral view strongly curved downwards.

Female. Unknown.

Distribution. In Australia, collected only at Mt Nebo, some 30 to 40 km north-west of Brisbane; also collected from SE Papua New Guinea.

Figures

FIGURES 132–145. Arcyphysa gen. nov. spp., ♂ genitalia diagnostic features. 132–133, Arc. acmea sp. nov. (Qld, Mt Bartle Frere, 0.5km N of South Peak [PT-999]): 132, ventral;133, left lateral.134–135, Arc.anaplasis sp. nov. (Qld, 25 km along Mt Lewis Road, SW of Mossman [PT-1003]): 134, ventral; 135, left lateral. 136–137, Arc. tortula sp. nov. (Qld, Bellenden Ker Range, Cable Tower No. 3 [PT-1031]): 136, ventral; 137, left lateral. 138–140, Arc. flinti sp. nov. (Qld, Palmerston National Park, Tchooratippa Creek [PT-2007]): 138, ventral; 139, left lateral; 140, dorsal. 141–142, Arc. volsella sp. nov. (Qld, Queensland, Lamington National Park, Coomera Creek [PT-1013]): 141, ventral; 142, left lateral.143–145, Arc. nebo sp. nov. (Qld, Mt Nebo [PT-1096]): 143, dorsal;144, left lateral; 145, ventral.