Diplectrona castanea Kimmins

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 : 7-8

Diplectrona castanea Kimmins

( Figs 22, 27 , 32–34)

Diplectrona castanea Kimmins 1953 , 342.

Diplectrona lyella Neboiss 1977 , 72; Neboiss 2003, 70 (synonym).

Material examined. Holotype D. castanea , ♂, Tasmania, National Park , 3000 ft, 26.xii.1936 ( BMNH) ; holotype ( D. lyelli ) ♂, Tasmania, King River , 5.xi.1961, N. Dobrotworsky ( NMV) ; paratype, 1♂, Hellyer River Gorge, 2.xii.1972, P. Zwick.

Other material: Tasmania: 1♂ 1♀, Arrowsmith Creek, 18 km SW of Derwent Bridge, 9.xii.1974, A. Neboiss [PT-1068; TRI-15009]; 1♀, Bull Creek, Cradle Mtn Road, 13.xii.1974, A. Neboiss [PT-2192; TRI-15006]; 1♂, Trib. of Darwin River, West Coast, 31.x.1976, P. Allbrook [TRI-15010, image]; 1♂, Mt Barrow, 11 km EbyN Nunamara, 41°23'S 147°25'E, 7.ii.1983, J.C. Cardale [PT-2238; TRI-15008]; 1♂, Little Florentine River, upstream of Gordon Road, 2.xii.1998, J. Jackson [PT-2135; TRI-15007]; 1♂, Nelson River, base of Nelson Falls, 3.xi.1998, J. Jackson [PT-2191; TRI-15004].

Diagnosis. Diplectrona castanea groups with D. spinata and D. inermis having in the male genitalia endothecal spines on the phallic apparatus, and in lateral view a spur-like apicomedial projection on the margin of abdominal segment IX. However, D. castanea is clearly distinguished by the very spiny, well-sclerotised complex of spines ( Figs 32, 34 ) rather than discrete sharp spines as in the other two species, and by the harpagones of the gonopods short, less than 0.25x length of their coxopodites, and strongly hooked rather than smoothly conical as in D. spinata or D. inermis .

Description. See Neboiss (2003, 70).

Remarks. The ‘diagnosis’ given by Neboiss (2003) is rather more of a ‘description’, being quite comprehensive.

Distribution. Known only from Tasmania, from the SE, NE, SW, and NW provinces.

Figures

FIGURES 17–31. Diplectrona Westwood 1839 spp., diagnostic features. 17–21, heads, dorsal: 17, D. felix McLachlan 1878 (France, Pyrenees), ♂; 18–19, D. tasmanica Jacquemart 1965 (Pine River, Cradle Mountain Road, Tas.): 18, ♂, and 19, ♀; 20, D. inermis (Banks 1939; NSW, Leura, ‘Bridle Vale’), ♂; 21, D. spinata (Banks 1939; Qld, Springbrook), ♂. 22–24, ♂ right wings, dorsal: 22, D. castanea (Kimmins 1953; Tas., Nelson River at base of Nelson Falls [TRI-15004]), right fore- and hind wings, dorsal; 23, D. spinata (Qld, Branch Creek, Brisbane Riv. Catchment [TRI-30501]), right forewing, dorsal; 24, D. willandi sp.nov. (holotype), right fore- and hind wings, dorsal. 25–26, sectionsof ♂ antennae:25, D. felix; 26, D. inermis. 27– 28, ♂ maxillary palps: 27, D. castanea; 28, D.spinata. 29, D. inermis, ♂ reticulate-walled internal sacs of abdominal segments VIand VII, ventral.30, D. felix, ♂ right lateral filament on abdominal segment V, ventral.31, D.inermis, ♂ leftlateral filament on abdominal 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 32–48. Diplectrona Westwood 1839 spp., genitalia diagnostic features. 32, D. castanea (Kimmins 1953), (Tas., Nelson River at base of Nelson Falls [TRI-15004]), ♂, ventral; 33–34, D. lyelli Neboiss 1977 (synonym of D. castanea; paratype; Tas., Hellyer River Gorge [PT-1043]), ♂ segments IX and X and gonopods: 33, left lateral, and 34, apex of phallic apparatus, left lateral. 35–37, D. inermis (Banks 1939), ♂: 35, holotype, ventral; 36, holotype, left lateral; 37, Vic., Wilson’s Promontory, Waterloo Bay[PT-1011], ventral. 38–41, D.spinata (Banks 1939), ♂: 38, NSW, BarringtonTops,Upper Williams R. [PT-1835], ventral; 39–40, Qld, Brisbane [TRI-39514]: 39, left lateral, and 40, ventral; 41, Qld, Springbrook [TRI-39496], ventral. 42–44, D. tasmanica Jacquemart 1965 (Tas., Pine River, Cradle Mountain Road; ANIC): 42–43, ♂ genitalia: 42, ventral, and 43, left lateral; 44, ♀, terminal abdominal segments, ventral. 45–46, D. willandi sp. nov. (Qld, Fishery Falls), ♂: 45, ventral;46, left lateral.47–48, D.spinata(Qld, Springbrook[TRI-39426]),♀ terminal abdominal segments:47, ventral;48, left lateral.