Australian Diplectroninae reviewed (Insecta: Trichoptera), with description of 21 new species, most referred to a new genus Author Wells, Alice Author Contents, Arturs Neboiss Table Of text Zootaxa 2018 2018-04-27 4415 1 1 44 journal article 30163 10.11646/zootaxa.4415.1.1 c803bce9-4469-43db-8acd-8291d035b6a2 1175-5326 1241736 5DAA824F-BCBD-47FF-9948-F7EC45829AEB Arcyphysa caldera sp. nov. ( Figs 117–118 ) 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 0313 ]) ; 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 117–118 ): 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.