Oxyethira (Trichoglene) bamaga, Wells, Alice & Dostine, Peter, 2016

Wells, Alice & Dostine, Peter, 2016, New and newly recorded micro-caddisfly species (Insecta: Trichoptera: Hydroptilidae) from Australia’s north, including islands of Torres Strait, Zootaxa 4127 (3), pp. 591-600 : 594

Oxyethira (Trichoglene) bamaga sp. nov.

Figures 6, 7

Diagnosis. This species is a member of subgenus Trichoglene , and similar to O. columba (Neboiss) from southeastern Australia to mid Queensland, and O. triangulata Wells , from far northeastern Australia (but see below), in having short, sclerotised gonopods. However, in ventral view these are pillar-like, with length almost 3x width, compared with the much shorter, tapered structures in those two species.

Description. Male. Length of each forewing 1.6–1.9 mm (n = 2). Antennae each with 24–25 flagellomeres. Abdominal segment VII with small acute apico-medial spine on ventral surface. Genitalia as in Figs 6, 7 . Segment VIII quadrate in ventral view. Segment IX triangular, deeply retracted into segment VIII, pair of triangular sclerotised processes laterally. Dorsal plate short, broad, with area of minute spinules apico-medially. Gonopods stout, sclerotised, in ventral view, length close to 3x width; dorsal process slender, positioned almost at right angle to length of body. Phallic apparatus about 1.5x length of abdominal segment VIII, without titillator; short membranous sheath subapically; apex bearing slender, twisted spine.

Female. Unknown.

Types. Holotype. male, NORTH EAST QUEENSLAND, Bamaga , 3–6.v.2011, J. Bond, ex Culicoides trap (ANIC, slide).

Paratypes. 1 male, NEQ, Bamaga , airport road, 19.iv.2010, J. Bond, ex Culicoides trap, (ANIC, alcohol); 1 male, NEQ, Bamaga , old farm, 21–24.vii.2009, J. Bond, ex Culicoides trap (ANIC, damaged, slide).

Etymology. Named for Bamaga , type locality of the species.

Figures

FIGURES 1 – 7. Hydroptila and Oxyethira spp. 1 – 5, Hydroptila roperi sp. nov.: 1 – 3, male genitalia: 1, left lateral; 2, phallic apparatus; 3, ventral; 4, 5, female terminalia: 4, abdominal segment VIII, dorsal; 5, abdominal segments VIII – X, ventral. 6, 7, Oxyethira bamaga sp. nov., male genitalia: 6, ventral; 7, phallic apparatus. Abbreviations: VIII, IX = abdominal segments VIII and IX; dpl = dorsal plate; dpr = dorsal process of gonopods; gon = gonopod; l lb IX = lateral lobe of segment IX; tlr = titillator; vpl = ventral plate.