Arcyphysa tortula, 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 : 38-42

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Arcyphysa tortula

sp. nov

Arcyphysa tortula   sp. nov

( Figs 136–137 View FIGURES 132–145 , 177–178 View FIGURES 164–178 , 183 View FIGURES 179–187 )

Material examined. Holotype ♂, North Queensland , Bellenden Ker Range, Cable Tower No. 3, 1054 m, 25– 31.x.1981, Earthwatch (QM [PT-1031; WTH-0458]).  

Diagnosis. In having the apicolateral processes on abdominal segment IX strongly sinuous, extended well beyond the apex of tergite X and the coxopodites broadly triangular in ventral view, subrectangular in lateral view, this species can be distinguished from other similar species such as Arc. acmea, Arc.   flinti, Arc.   anaplasis   , and Arc. nebo   . In ventral view, Arc. tortula   is clearly distinguished by the strongly twisted apicolateral processes on segment IX and the digitate lobes of the harpagones.

Description. Male. Length of each forewing: 7.5 mm (n = 1); maxillary palpi segments 2, 3, and 4 of equal length. In abdomen ( Fig. 183 View FIGURES 179–187 ), reticulate-walled internal sacs in segment VI broadly rounded, sacs in segment VII ovoid, both sets slightly exceeding lengths of respective segments.

Genitalia ( Figs 136–137 View FIGURES 132–145 , 177–178 View FIGURES 164–178 ): Abdominal segment IX clearly delineated dorsally from tergite X, narrow midlaterally, strongly twisted apicolateral processes extend well beyond tergite X, bordered by dense setae; tergite X shallowly cleft apically; gonopods with coxopodite stoutly triangular in ventral view, subrectangular in lateral view, harpago bifid, lobes digitate; phallic apparatus without parameres, slender distally, stout medially and towards base.

Female. Unknown.

Distribution. Another apparently rare species, being known only from the type specimen from the Wet Tropics of north-eastern Queensland.


Royal Botanic Gardens, National Herbarium of New South Wales