Arcyphysa caldera,

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: 32

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Arcyphysa caldera

sp. nov.

Arcyphysa caldera  sp. nov.

( Figs 117–118View FIGURES 117–131)

Material examined. Holotype ♂, NE Queensland, The Crater, Atherton Tableland , 25.iv.1979, S.R. Curtis ( NMV [PT-1040; TRI-39415; WTH-0327]). 

Paratypes, NE Queensland: 1♂ (dry), 17 mls S of Atherton , 3000 ft, 19.iii.1964, I.F.B. Common & M.S. Upton ( ANIC)  ; 1♂ (dry), Wright Creek, Lake Eacham N.P., 5.ix.1972, O.S. & C.M. Flint ( NMNH)  ; 1♂, Tinaroo Creek road, 21.ii.1982, M.S. Moulds ( NMV [ WTH 0313View Materials])  ; 1♂, Mt Lewis Road, Julatten, 2500 ft, rainforest, 10.xii.1986, A. Walford-Huggins (NMV [WTH 0311]).

Diagnosis. This species groups with Arc. sybillae, Arc.  crescentina, Arc.  hugginsi  , and Arc. carnarvona  , all of which share the male genitalic feature of a basal paramere on the phallus. Like Arc. crescentina, Arc.  hugginsi  , and Arc. carnarvona, Arc.  caldera  has 2 sets of paired processes on medially on apicolateral margins of abdominal segment IX, and in common with Arc. crescentina  , one pair are crescent-shaped, but more openly curved and densely setose than in Arc. crescentina  and the dorsal pair are not flattened distally; the coxopodites of the gonopods are more slender, being about 5x as long as wide.

Description. Male. Length of each forewing: 8.8–10.5 mm (n = 2). Abdomen with internal membranous sacs elongate-oval, extending for about 1.5x segment length; lateral filaments on segment V short.

Genitalia ( Figs 117–118View FIGURES 117–131): Tergite IX slightly sclerotised, covered with minute spicules, row of bristles along distal margin, fused with membranous tergite X; sternite IX lying partly within segment VIII; upper apical angle extended to slender, curved, outer apicolateral process, inner apicolateral process arising ventromesally, openly curved, covered with row of spicules; gonopods rather slender, each with coxopodite in ventral view length about 5x maximum width, in lateral view slightly expanded distally, harpago short, curved mesad, shallowly bifid apically; phallic apparatus slender, downturned slightly, expanded apically, small membranous tapered paramere on each side of base.

Female. Unknown.

Distribution. Known only from North-east Queensland.

Remarks. An adult female was taken with the Tinaroo Creek specimen, but since several species have been taken in the same general area, any association can only be tentative.


Museum Victoria


Australian National Insect Collection


Smithsonian Institution, National Museum of Natural History