Paucispinigera Freeman, 1959

Cranston, Peter S., 2020, Life histories of Paucispinigera Freeman, Paraborniella Freeman and Paratendipes Kieffer (Diptera: Chironomidae) with phylogenetic considerations, Zootaxa 4853 (4), pp. 527-547 : 529

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Paucispinigera Freeman


Paucispinigera Freeman  

( Figs 1–3 View FIGURE 1 View FIGURE 2 View FIGURE 3 )

Paucispinigera Freeman 1959: 428   .

Type-species: Paucispinigera approximata Freeman 1959: 428   , by monotypy and original designation.

Generic Diagnosis. Male and female adults, described briefly by Freeman (1959), within tribe Chironomini   diagnostically have unusual wing venation ( Figs 1A, B View FIGURE 1 ) with R 2+3 near adjacent to R 1, and with long costa and curved R 4+5 terminating at wing tip close to the apex of M 1+2. Distal half of M 1+2 (and M 3+ 4 in female) with numerous uniserial setae, as on R, R 1 and R 4+ 5. Squama bare. Fore leg tibia with rounded apex ( Fig. 1C View FIGURE 1 ); mid and hind leg tibiae apically with 2 near contiguous combs, broader (outer) with single apically curved spine ( Fig. 1D View FIGURE 1 ), narrower (inner) without spine. Male genitalia ( Fig. 1 View FIGURE 1 E–G) with curved gonostylus with apical spine (possible megaseta) and well developed median volsella.

Pupa. Cephalic area with neither cephalic tubules nor warts, with frontal setae ( Fig. 2A View FIGURE 2 ). Thorax slightly crenulate dorsally ( Fig. 2B View FIGURE 2 ), with a few-branched horn. Abdomen ( Fig. 2C View FIGURE 2 ) with strong pedes spurii B on TII; with rectangular spinule pattern on TII–V, anteromedian patch on TVI, TVII–VIII without spinulation. Hook row of TII short, continuous. Conjunctives III and IV with transverse spinule band. Pleura of V posteriorly with spinule patch ( Fig. 2D View FIGURE 2 ). L setae taeniate on V–VIII, 4, 4, 4, 4. ‘Comb’ with dominant tooth and several outer curved smaller teeth ( Fig. 2E View FIGURE 2 ). Anal lobe with uni- biserial fringe and dorsal seta.

Larva. Dorsal head with frontoclypeus flared anteriorly with semilunar clypeus ( Fig. 2F View FIGURE 2 , 3B View FIGURE 3 ). Antenna with 6 segments with Lauterborn organs on apices of 2nd and 3rd segments ( Fig. 2G View FIGURE 2 , 3C View FIGURE 3 ). Labral SI broadly plumose, near contiguous on fused base, SII apically serrate arising from short nearly contiguous tubercles; pecten epipharyngis of three separate lobes, each with 2 –4 rounded teeth; premandible with 4 teeth and strong brush ( Fig. 2H View FIGURE 2 , 3D, E View FIGURE 3 ). Mandible with short pale dorsal tooth, larger triangular apical tooth and 2 inner teeth; seta subdentalis elongate; mola and inner margin smooth; seta interna densely plumose, more basal than usual ( Fig. 2I View FIGURE 2 , 3I View FIGURE 3 ). Ventromental component of mentum with 8 uneven-sized teeth, paler than laterals; dorsomentum with 4 darker teeth each side, each slightly diminishing in size laterad ( Fig. 2J View FIGURE 2 , 3H View FIGURE 3 ). Ventromental plate fan-shaped with evenly distributed striae.












Paucispinigera Freeman

Cranston, Peter S. 2020


Freeman, P. 1959: 428