Caenota plicata Mosely 1953

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 : 467-469

Caenota plicata Mosely 1953

Figs 11–13

A description of the adult male was given by Mosely in Mosely & Kimmins (1953). The female was described by Neboiss (1977).

Adult. Male head capsule as in Figs 11, 12 . Antennae each with anterior projection arising from base of antennal scape and extending nearly to distal margin of pedicel, outer surface covered in pale setae, becoming darker on distal margin, inner surface concave, with small patch of golden and dark setae towards anterior edge of concavity; posterior projection relatively small, about size of head in lateral view, ovoid, anterodorsal corner extending anterad into slender, finger-like projection, outer surface covered with dark and pale setae, denser patch of dark setae on anterodorsal corner, inner surface concave and having this cavity filled with thick golden scale-like setae, distal margin with dense band of dark setae, becoming paler towards posterior corner and along posterior edge. Maxillary palpi rotated 90 degrees, not held closely together; each with segments I and II pigmented; segments III, IV, and V fleshy; segments I and II outer surfaces with dark setae, inner surfaces with dense pale setae, each with small flange along dorsal and lateral margins; segment II with large circular brush of dark setae, directed anterad; segment III arising before apex of segment II, with small brush of setae on anterior surface; segment IV bulbous, about 1/2 size of segment III, with small brush of setae on ventral surface; segment V small, abruptly tapering, setose.

Larva. Approximate length 12 mm at maturity. Head ( Fig. 13 ) having frontoclypeus with lateral margins of anterior section relatively straight, converging towards anterior margin; setae 6 positioned at constriction; posterolateral corners at constriction somewhat rounded. Pronotum with narrow transverse line of setae, one or two setae deep, at about 1/3rd distance from anterior margin (as in Figs 44 , 66 ). Legs having each foretrochantin with single, long, dark setae about mid-length on anterodorsal margin (as in Fig. 45 ). Abdomen with gills either simple or branched on segments II and III only; segment II gills VL2 either present or absent, VL3 present, L2 either present or absent, DL1 either present or absent; segment III gills VL1 present, DL1either present or absent.

Material examined. [ AUSTRALIA:] Lucky Hit Ck site 2 on Lucky Hit Ck Rd, near Lucyvale, Victoria, 36º 18' 36''E 147º 35' 9.6''S, 13 Jan 2010, M. Shackleton, 2 males (MV MS130, MS131), 8 larvae (MV MS137, MS174–MS180). Lucky Hit Ck, Lucky Hit tk, near Lucyvale, Victoria (EPA site-AFC), 24 Nov 2009, EPA Victoria, 2 larvae (MV MS232, MS233). Chalet Ck at Mt. Buller, Victoria, - 37º 8' 60''E 146º 26' 59.64''S, M. Shackleton, 2 larvae (MS MS267, MS268). White Bridge on Mt Buller Rd, Victoria, M. Shackleton, 7 larvae (MS MS250–MS256).

Distribution. Australia (southeast, Neboiss 1986).

Ecology. No ecological information was given with the original description provided by Mosely in Mosely & Kimmins (1953) nor in subsequent publications. From the collection of specimens for the current study it appears that Caenota plicata larvae inhabit a range of flow conditions from small creeks to large rivers. As larvae, they are often found in slower flowing areas, attached to the underside of boulders, where they feed on vegetable matter. In smaller streams they can be found in areas of shallow water and have been collected from near vertical conditions. Pupae are generally found more towards the middle of rivers in more permanently flowing areas.

Figures

FIGURES 7 – 15. Caenota spp. 7 & 8, C. galeata adult male head: 7) dorsal; 8) left lateral. 9 & 10, C. monteithi adult male head: 9) dorsal; 10) left lateral. 11 – 13, C. plicata head: 11) adult male, left lateral; 12) adult male, dorsal; 13) larva, dorsal. 14 & 15, C. simulans adult male head, anterior: 14) original photo provided by the BMNH; 15) line drawing adapted from photo.

FIGURES 39 – 45. Caenota cudonis. 39 – 42, pupa: 39) mandibles, ventral; 40) right anterior hook plate of abdominal segment VI, dorsal; 41) right posterior hook plate of abdominal segment V, dorsal; 42) terminal segment of abdomen, dorsal. 43 – 45, larva: 43) head, dorsal; 44) pronotum, dorsal; 45) left foretrochantin, left lateral.

FIGURES 60 – 67. Caenota equustagna. 60 – 64, pupa: 60) head, dorsal; 61) head, ventral; 62) terminal abdominal segments, dorsal, 63) right anterior hook plate of abdominal segment V, dorsal; 64) right posterior hook plate of abdominal segment V, dorsal. 65 – 67, larva: 65) head, dorsal; 66) pronotum, dorsal; 67) left foretrochantin, left lateral.