Byrsinus setosus J. A. Lis

Lis, Jerzy A., 2001, A REVIEW OF THE GENUS BYRSINUS FIBBER, 1860 (HEMIPTERA: HETEROPTERA: CYDNIDAE) IN AUSTRALIA, WITH A KEY TO AUSTRALO-PACIFIC SPECIES, Annales Zoologici 51, No. 2, pp. 197-203 : 201

Byrsinus setosus J. A. Lis

(Figs 5, 11, 16)

Byrsinus setosus J.A. Lis, 2001: 17 .

Redescription. Body length: 3.22- 3.82; body width: 1.84-2.07. Dorsal body reddish brown or castaneous, antero-lateral parts of pronotal disc somewllat darker than its remainingparl:,,, head dark castaneous or blackish brown.

Head finely punclured dorsally, anterior half of clypeus almost impunclate, or with a Jew punctures; clypeus somewhat tapering apicad, slightly shorter than paraclypei, bearing· a subapical pair of peg-like setae; paraclypeus with a submarginal row of 11-13 setigerous punctures bearing 3-4 hair-like setao aud 8-9 peg-Ukc setae (Fig.:5); eyes reddish bl'own or castancous, each witll long stout apical seta, ocular index about 3.4- 3.9; ocelli small, yellowish brown. ocellar index about 7.5-9.0; distance between ocelli about 5-10 times a distance of ocellus Crom eye; antennae yellowish brnwn or pale brovro, its 3rd segment 1.18-1.27 times longer than the 2nd;hucculae low, irnpunctate; anterior half of g·ulai· plate irnpunctatc; rostmm yellowish brown or pale brown, reaching mid coxae.

Pronotum densely punctured, except for calla! areas and umbones; punctures larger than those on head, punctures in lateral parts of pronotal disc more crowded and coarser than those in its posterior half; urnbones moderately swollen: anterior margin angularly concave centrally; lateral parts of pronolal disc with 27- 35 long submarginal hair-like setae and anterior patch or about 5-12 long hair-like seta.c on either side.

Scuicllum densely punctured, except for its apex and antero-laleral ang'les,punctures as large as or some,vhat larger than those on pronotal djsc.

Cori.um more or less densely punctured. punctures as large as those on scutellum; clavus with one complete and two partial rows of punctures;mesocorium with two rows of punctures paralleling clavo-corial suture, punc­!uration of mesocorial disc weak (female) or dense (male); exocorium wilh w·ell developed rows of punctu1·es; costa with a 1·0.v of 17-21 long hair-like setae; membrane semihyaline. slig'htly browned, clearly extending beyond the tip or abdomen.

Propleuron almost impunctate, with a few hardly visible punctures close lo coxae; meso- and metapleural evaporatoria typical of the genus. Legs not specifically modified.

Abdominal stcrna laterally finely punctured, segments covel'ed with Jong hair-like setae. Opening of male pygophorc as in Fig. Hi, paramere as in Fig. 11.

Type examined. INDONESiA: Holotype female: East Indonesia, ins. Flores , 28.VIII.1962, I. Warswskij ( ZMAS) .

Othermaterial examined. AUSTRALIA: Queensland: 1 male, Northern Queensland, Townsville , G. F Hill ( SAMA) .

Note. The original description was based on a single female specimen;herein il is extcnted with ma.le characters.

Distribution. Queensland (firs! record), Indonesia (Flores).

REMARKS

Australian representatives of the genus B.l}rsinus form two clearly separable groups of species, namely the northern group (including R. setosus only) which is allied to Oriental B. varians in having both types or submarginal cephalic setac (hair-like aod peg-like sctae), and tile second, southernmore g1·oup (including B. austral-is, B. 111ultitricltus. B. oehmreus) which species bear only hair-Hke setac on lhe submargins of head (poglike setae are absent).

Since the loss of cephalic peg-like setae can obviously be treated within a genus as an advanced character (Lis and Pluot-Sigwall. in press), the latter (southern) group of species may be hypothesized as evolutionary younger, whereas the former (northern) group as its ancestor.