Austropsyche Banks

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 : 15

Austropsyche Banks

( Figs 49–101 )

Austropsyche Banks 1939 , 496. Type species Austropsyche victoriana Banks 1939 , by monotypy.

Diagnosis. Austropsyche is distinguished from Diplectrona and Arcyphysa gen. nov. mainly by the mesal processes on the coxopodites. As on the head of Diplectrona , the anterolateral warts, if divided at all, are divided by only a poorly defined suture; in Austropsyche the posterior portion is usually more or less fragmented. The forewings ( Figs 49, 50 , 76–79 ) resemble those of Diplectrona and Arcyphysa in each having cell ac lanceolate and hind wings each with Sc and R1 curved towards the leading margin, but only slightly; the median cell length is equal to or about 2/3 that of the discoidal cell. In male genitalia, Austropsyche , in common with Diplectrona , may have sclerotised spines associated with the phallus; these are absent in Arcyphysa .

Description. Head ( Figs 70–75 ) dorsally with 5 setal warts, anterolateral pair often incompletely divided, posterior part fragmented or at least irregular in appearance. Antennae with median suture on segments ( Fig. 80 ). Maxillary palpi ( Figs 51 , 81 ) with segment 5 very long, equal to length of rest of palp, segment 3 about twice length of 4, but scarcely longer than 2, segments 2, 3 and 4 flattened, expanded and rounded distally ( Fig. 81 ). Forewing ( Figs 49, 50 , 76–79 ) fork 4 equal to 5, A1+2+3 curving proximally so cell ac is lanceolate, not parallelsided, discoidal cell length equal to or about 2/3 length of median cell; hind wing median cell open, subcosta and radius running parallel to near middle of discoidal cell where they are connected by short cross-vein, and then separating, radius bending behind, but not so much as in Diplectrona so as scarcely to approach discal cell and space not narrowed, costal area rather broader than in allied genera, not narrowed near middle, and with an oblique costal cross-vein before middle. Abdomen with lateral filaments ( Fig. 83 ) on segment V about length of segment or 0.75x length; paired reticulate-walled internal sacs ( Fig. 82 ) within abdominal segments VI and VII generally 1.5– 2x length of segments. Male genitalia characterised by mesal process on coxopodite of gonopods (e.g., Figs 52–53 , 59–60, 62, 66, 68–69).

Remarks. In their unpublished MS redescribing Banks’ types, Ross and Morse (personal communication 1975) commented on the ‘unusual extensile slender apical portion’ of the phallus of Austropsyche victoriana , on how in this respect Austropsyche differs from any other Diplectroninae genera. This structure is apparent in some of the museum specimens of Au. victoriana , but not in all, and is not seen in any other species in the genus; possibly it depends on state at time of preservation, or method of preservation. On the basis of other character states, two distinct groups are recognised, referred to here as the Au. victoriana Group, including Au. victoriana , Au. bifurcata (Kimmins, in Mosely & Kimmins 1953) , and Au. kaputar sp. nov.; and the Au. acuta Group, comprising Au. acuta sp. nov. and Au. ambigua sp. nov. Placement of a 6th species, Au. morana sp. nov., is enigmatic; it appears to combine some male genitalic features of both groups, but in other features is highly autapomorphic.

Distribution. Found from the Grampians of south-western Victoria to south-eastern Queensland; no species of Austropsyche is known to occur in Tasmania.

Figures

FIGURES 49–58. Austropsyche Banks 1939 spp., diagnostic features. 49–50, ♂ right fore- and hind wings, dorsal: 49, Au. bifurcata (Kimmins 1953; holotype); 50, Au. ambigua sp. nov. (NSW, Upper Manning River, 20 km NNW Rawdon Vale [PT- 1019]). 51, Au. ambigua sp. nov. [PT-1019], ♂ maxillary palp. 52–56, Au. victoriana Banks 1939, ♂ genitalia: 52, (holotype), left lateral; 53–54, (Vic., Kalymna Falls, Williams Range, Grampians [PT-1009]): 53, ventral, and 54, left lateral; 55–56, (Vic., CementCreek [PT-1100]):55, left lateral,and 56, phallic apparatus, leftlateral and ventral and dorsal, respectively, leftto right. 57–58, ♀ terminal abdominal segments, left lateral: 57, Au. victoriana (Vic, Cumberland Falls, SE Marysville [PT-1046]); 58, Au.ambigua sp. nov. (NSW, Upper Manning River, 20 km NNW Rawdon Vale [PT-1058]). Scale bars = 2 mm.Abbreviations: ac = anal cell; A 1+2+3 = fused anal veins A 1, A 2, A 3;dc = discoidal cell; cox = coxopodite; coxp = mesal process on coxopodite; fI, fII, fIII, fIV, fV = forks I–V; mc = median cell; har = harpago; ph = phallic apparatus; VIII, IX, X = abdominal segments VIII, IX, X.

FIGURES 59–69. Austropsyche Banks 1939 spp., ♂ genitalia diagnostic features. 59–60, Au. acuta sp. nov. (holotype, NSW, Crystal Creek Rainforest Resort, Upper Crystal Creek; ANIC): 59, ventral; 60, left lateral.61–62, Au. ambigua sp. nov. (NSW, Upper Manning River,20 km NNW Rawdon Vale [PT-1019]):61, ventral; 62, leftlateral.63–65, Au.bifurcata (Kimmins1953; ACT, Bendora ([PT-1015]), ♂ genitalia: 63, ventral; 64, apex of phallic apparatus, left lateral; 65, left lateral. 66–67, Au. morana sp. nov. (Qld, trickle on Moran's Falls track, Lamington NP [TRI-54706-1]): 66, ventral; 67, left lateral. 68–69, Au. kaputar sp. nov. (NSW, Mt Kaputar NP, Bullawa Creek [PT-1714]): 68, ventral; 69, left lateral.

FIGURES 70–83. Austropsyche Banks 1939 spp., ♂ diagnostic features.70–75, heads, dorsal:70, Au.victoriana Banks 1939; 71, Au.bifurcata (Kimmins 1953); 72, Au. kaputar sp. nov.; 73, Au. acuta sp. nov.; 74, Au. ambigua sp. nov.; 75, Au. morana sp. nov. 76–79, right fore- and hind wings, dorsal: 76, Au.victoriana; 77, Au. kaputar sp. nov.; 78, Au.acuta sp. nov.; 79, Au. morana sp. nov. 80, Au. acuta sp. nov., antennal segments. 81, Au. acuta sp. nov., maxillary palp. 82, Au. victoriana, reticulate-walled internal sacs of abdominal segments VI and VII, ventral. 83, Au. acuta sp. nov., left lateral filament on segment V, ventral. Scale bars = 2 mm. Abbreviations: ac = anal cell; alw = anterolateral wart; amw = anteromesal wart; A 1+2+3 = fused anal veins A 1, A 2, A 3; dc = discoidal cell; mc = median cell; pw = posterior wart.

FIGURES 84–101. Austropsyche Banks 1939 spp., genitalia diagnostic features. 84–95, ♂ genitalia: 84–87, Au. victoriana Banks 1939:84–85, (typical form): 84, ventral, and 85, left lateral; 86, (Vic., Wilhelmina Falls [TRI-12958]), ventral, showing variation in development of the ventrolateral ‘plates’ at the bases of the gonopods; 87, (Vic., Cumberland Falls, SE Marysville [PT-1018]), ventral, showing variation in development of the ventrolateral ‘plates’ at the bases of the gonopods. 88–89, Au. bifurcata (Kimmins 1953; (ACT, Bendora [1015]): 88, ventral, and 89, left lateral. 90–91, Au.kaputar sp. nov. (holotype): 90, ventral, and 91, left lateral. 92, Au. acuta sp. nov. (NSW, Upper Crystal Creek), ventral. 93, Au. ambigua sp. nov. (Vic. Noorinbee [1097]), ventral.94–95, Au. morana sp. nov. (holotype): 94, ventral; 95, left lateral.96–101, ♀ terminal abdominal segments.96–97, Au.bifurcata (NSW, New South Wales,Dead Horse Gap): 96, ventral, and 97, left lateral; 98, Au.victoriana, ventral. 99, Au. morana sp. nov. (Qld, trickle on Moran's Falls track, Lamington NP), ventral. 100–101, Au. acuta sp. nov. (NSW, Upper Crystal Creek): 100, ventral, and 101, left lateral.