Arcyphysa hugginsi,

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: 34-35

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Arcyphysa hugginsi

sp. nov.

Arcyphysa hugginsi  sp. nov.

( Figs 121–122View FIGURES 117–131, 168–169View FIGURES 164–178)

Material examined. Holotype ♂, North-east Queensland, Julatten, Mt Lewis Road , 3,700 ft, 25.i.1976, A. Walford-Huggins ( NMV [PT-1001; WTH 0320]). 

Paratypes. North-east Queensland: 2♂ ( NMV [ WTH 0322–0323View Materials], 1♀ [PT-1051; WTH 0321]), data as for holotype  ; 1♂, Bellenden Ker Range, Cable Tower No. 3, 1054 m, 25–31.x.1981,Earthwatch (QM [WTH 0462]); 1♂, Bellenden Ker Range, Summit, TV Station, 1560 ft, 1–7.xi.1981, Earthwatch (QM [WTH 0324]); 1♂, Mt Bartle Frere, 0.5 km N of South Peak , 1500 ft, 6–8.xi.1981, Earthwatch (QM [WTH 0461])  ; 1♂, Julatten, Mt Lewis Road, 2,500 ft, 10.xii.1986, A. Walford-Huggins (NMV [PT-1040; TRI-38720]).

Diagnosis. As with Arc. sybillae, Arc.  caldera, Arc.  crescentina  , and Arc. carnarvona  this species has a pair of parameres on the phallus and distinctive, complex male genitalia with the apicolateral angles of abdominal segment IX produced to form one or two pairs of elongate processes. Arcyphysa hugginsi, Arc.  caldera  , and Arc. carnarvona  have two pairs of apicolateral processes of tergite X and in Arc. hugginsi  the outermost pair are heavily sclerotised, flattened distally and each terminates in a bulbous swelling that narrows abruptly to a sharp point, in contrast to Arc. carnarvona  which has these processes only slightly expanded subapically and terminating in a crenate club and Arc. caldera  in which they are of even width throughout and rounded apically.

Description. Length of each forewing: ♂ 9.5–11.0 mm (n = 5); ♀ 12 mm (n = 1).

Male. Abdomen with internal glandular sacs about as long as one segment, slightly elongate; lateral filaments on segment V short.

Genitalia ( Figs 121–122View FIGURES 117–131, 168–169View FIGURES 164–178): Segment IX partly retracted into abdominal segment VIII; sternite IX lying inside segment VIII, apicolateral angles each extended into heavily sclerotised, somewhat twisted, apically pointed process and also mesal pale curved process; tergite IX slightly sclerotised, evenly rounded distally, fused with membranous segment X; gonopods each with coxopodite in ventral view about 3.5x maximum width, slightly tapered distally, harpago short, curved inward, abruptly reduced and slightly bifid apically; phallic apparatus expanded basally with flexible, membranous, apically sclerotised paramere on each side, shorter than in D. sybillae  .

Female. Abdominal sternite VIII in form of pair of sub-quadrate ventral plates, distal mesal angles slightly produced into short rounded lobes; segment IX basally with transverse opening to sclerotic cavity.

Distribution. North-east Queensland wet tropics.


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