Deskripsieng
Larva: Total length 9.5 – 10.5 mm (n = 10). C-shape body typical for Hydropsychidae. Background color of head and notal sclerites yellow. Head: Head capsule width 0.80 – 1.15 mm (n = 10). Entire head light yellow (Figs. 2 – 4). Frontoclypeus with anterior margin concave, slightly crenulate; faint large spot anteromedially; pair of faint light marks immediately anterior of tentorial pits and faint light mark between them; posteromedian portion with one pair of small, pale, muscle scars and small cluster of muscle scars near posterior apex (Fig. 5). Region around eyes and posterior quarter of head lighter yellow in dorsal view (Fig. 3), ventral side darker along midline (Fig. 4). Head covered with long setae, mingled with tapered setae on dorsal and lateral regions in anterior three-quarters (Fig. 3). Labrum light-brown; elliptical in dorsal view; bearing dense and well-developed, brown setae anterolaterally and setae on dorsal surface, posterior margin slightly concave in middle (Fig. 6). Mandibles with prominent lateral flanges, each with row of setae along lateral groove. Each mandible with 2 apical and 4 mesal teeth, right mandible with basal tooth distant from others, left mandible with mesal tuft of hairs (Fig. 7). Submentum trapezoidal with posterolateral and anterolateral corners broadly rounded; anterior margin broadly Y-shaped with median cleft; cleft with sides parallel; lateral areas with setae (Fig. 8). Anterior ventral apotome without or with weakly prominent anteromedian tubercle, lateral arms long, narrow, apically blunt, and posterior point acute; posterior ventral apotome small (Figs. 4, 8). Thorax: Nota yellow with covering of brown setae. Pronotum covered with long, truncate peg setae, mingled with tapered setae, same setae projecting beyond anterior margin (Figs. 9 – 10). Meso- and metanota each covered with numerous, inclined, long, scale hairs; same setae projecting beyond anterior margin (Figs. 9, 11 – 12). Prosternite broadly transverse, with broad dark band along posterior margin and with pair of small sclerites near posterolateral angles (Fig. 16). Propleura ventrally with stout setae; foretrochantins unforked and each with rudimentary basodorsal ramus (Fig. 13). Forelegs with feather-like setae mingled with palmate setae on mesal and lateral surfaces of coxae; trochanters and femora with long, feather-like setae on ventral surfaces mingled with long setae (Fig. 13). Mid- and hind legs similar in size, shape, and structure; each with feather-like setae mingled with spike-like setae on posterior surface of trochanter, femur, and tibia (Figs. 14 – 15). Mesosternum with one pair of gills; metasternum with 2 pairs of gills; gills consisting of central stem bearing many lateral filaments (Fig. 2). Abdomen: Abdominal segments with long, recumbent setae, more dense ventrally. (Figs. 2, 9, 17 – 18). First sternum with 2 pairs of gills with adjacent bases (Figs. 2, 9). Segments II – V each with one pair of median gills. Segments II – VII each with one pair of lateral gills each arising from common base. Sterna VIII and IX each with pair of spike-bearing plates, sternum IX with spikes emanating from prominent sockets. Each sclerite of sternum IX entire posteriorly and triangular. Tergum IX with small lateral sclerite and pair of large ventral sclerites (Fig. 17). Anal prolegs with bent apicoventral claw and apicodorsal cluster of long bristles, dorsal surfaces with spikelike setae, ventral surfaces without spike-like setae (Figs. 2, 18). Pupa (Figs. 19 – 22): Mandibles tapering regularly to pointed apex; inner margin with 4 large teeth (Fig. 20); widened basally, with elongate setae on lateral and ventral surfaces. Dorsally, with 1 pair of anterior hook plates on each of abdominal segments III – VIII; 1 pair of posterior hook plates on each of segments III – IV (Figs. 19, 21 – 22), posterior hook plates of segment IV covered with row of long setae (Fig. 21). Apical processes each with wide base narrowing distally to subapicolateral shoulder; apex obliquely truncate; ventral surface and lateral margins bearing long setae (Fig. 22).
Sumber: The larva and pupa of Potamyia flavata (Banks 1934) (Trichoptera: Hydropsychidae): Description, life cycle, and notes on its biology
