Caenota nemorosa Neboiss 1984

Shackleton, M. E. & Webb, J. M., 2015, Revision of the genus Caenota Mosely (Trichoptera: Calocidae), with descriptions of 2 new species and the larva of C. nemorosa Neboiss, Zootaxa 3972 (4), pp. 451-481 : 469-471

Caenota nemorosa Neboiss 1984

Figs 16–24

Descriptions of the adult male and female were given by Neboiss (1984).

Adult. Male head capsule as in Figs 16, 17 . Antennae each with anterior projection slender, arising from first 1/ 3rd of scape and terminating bluntly before distal margin of scape; posterior projection with dorsal and posterior margins usually rounded in lateral view; inner surface concave, having ventral surface of this concavity with dense setae; distal margins of inner surface fleshy, with fringe of pale setae along dorsal and posterior margins; dorsoposterior corner of fleshy margin with tuft of darker setae, sometimes produced distally and giving angled appearance to posterior and dorsal margins of posterior projection in lateral view. Maxillary palpi held closely together; each with segments I, II, and III pigmented; segments IV and V fleshy; segments I and II each having outer surface with sparse setae, inner surface with dense pale setae, their dorsal and ventral margins each with fleshy flange; segment II dorsal flange large, about 2/3rds depth of segment, lateral flange with tuft of dark setae close to distal margin; segment III small, arising before apex of segment II; segment IV small, translucent, bulbous; segment V of moderate length, about as long as segments I and II combined, slender, having dorsal and ventral surfaces and basal area clothed with long, dark, setae extending beyond apex of segment.

Pupa. Male head as in Figs 18, 19 . Mandibles each with small, indistinct subapical tooth mesally. Labial palpi each with segment III expanded. Abdomen having 1 pair of anterior hookplates on tergites III to VI and 1 pair of posterior hookplates on tergite V; anterior hookplates ( Fig. 21 ) with 2 or 3 hooks; posterior hookplates ( Fig. 22 ) with 2 hooks; segment IX ( Fig. 20 ) relatively square, without lateral projections, with raised triangular area dorsally; abdomen terminating in pair of tapering sclerotized processes curved dorsolaterad to acute apices, each with single basolateral setae, three basoventral setae (only two figured) and around 10 subapical setae; ventral surface with three pairs of long setae arranged close to one another near mid-line and directed towards lateral margin, one pair of shorter setae positioned more lateral to these.

Larva. Approximate length 7.5–8.5 mm at maturity. Head ( Fig. 23 ) having frontoclypeus anterior section relatively square, with lateral margins parallel towards anterior margin; setae 6 positioned halfway between constriction and anterior margin of frontoclypeus. Pronotum ( Fig. 24 ) with scattered setae in anterior half. Each foretrochantin with single long, dark seta at about mid-length of anterodorsal margin. Abdomen with gills either simple or branched; segment I on each side with gill either absent or present laterally posterior to spiny patch; segment II gills VL1 and VL2 either present or absent, VL3 present, L1 and L2 either present or absent, DL1 either present or absent; segment III gills VL1 present, DL1 either present or absent; segment IV gill VL1 present or absent, unbranched.

Material examined. [ AUSTRALIA: North Queensland] Huntersbrook Ck on Gordonvale–Atherton Hwy, 17º 10' 38.6”S 145º 41' 30.8”E, 20 May 2010, J.M. Webb and M. Shackleton, 3 males (QM MS388–390), 10 females (QM MS391–MS400), 11 larvae (QM MS401–411 and MS590), 1 pupa (QM MS346). Granite seep on Gordonvale–Atherton Hwy, 20 May 2010, J.M. Webb and M. Shackleton, 4 larvae (QM MS576–579). Upper Freshwater Ck, Whitfield Ra. nr Cairns, 3 Apr 1975, M.S. Moulds, 2 males (MV WTH-1121). Lock Davies Ck Rd, Lamb Ra. Mareeba dist., 10 Nov 1974, M.S. Moulds, 2 males (MV WTH-1122).

Distribution. Australia (northern Queensland, Neboiss, 1984).

Ecology. The habitat for the larva of C. nemorosa appears to be very specific. Of the areas that were visited along the Gordonvale–Atherton Highway, only 2 sites yielded C. nemorosa larvae. At each site, most of the larvae were found attached to, or near, tree roots and organic matter in areas of very shallow, but relatively fast flowing water. Larvae were always submerged and never found in the splash zone. At the Huntersbrook Creek site, a few larvae were collected from boulders in fast flowing water to a depth of about 30 cm. Among the specimens examined by Neboiss (1984) is one that was collected from Bamaga, Cape York. This locality seems anomalous in regards to the other, wet tropical, sites around the Cairns region, in being tropical savannah with very low elevation.

Figures

FIGURES 16 – 24. Caenota nemorosa. 16 & 17 adult male head: 16) dorsal; 17) left lateral. 18 – 22 pupa: 18) head, dorsal; 19) head, ventral; 20) terminal segment, dorsal; 21) anterior hook plate, dorsal; 22) posterior hook plate, dorsal. 23 & 24, larva: 23) head, dorsal; 24) pronotum, dorsal.