Daploeuros reichertae, Ruta, 2020

Ruta, Rafał, 2020, A new species of Daploeuros Watts (Coleoptera: Scirtidae), Zootaxa 4728 (3), pp. 334-340 : 334-335

Daploeuros reichertae sp. nov.

( Figs 1C , 2 )

Type material. Holotype, male ( ANIC): ³, ‘ AUSTRALIA, NSW, Chichester St. For. Allyn River For. Pk. 32°08’S 151°27’E, 410m, 24 XII 1990, rainforest’, ‘ D. A. Pollock L. A. Reichert, collectors.’, ‘ D.A. Pollock Collection’ . Paratype, male ( DBET): same data as holotype .

Diagnosis. Total length 6.2–6.6 mm. Trigonium of penis much shorter than parameroids, with a relatively shal- low subtriangular emargination.

Description. Habitus: TL 6.2–6.6 mm. Elongate, parallel-sided, setae dense, semi erect, yellowish; prono- tum narrower than elytra, anterior angles projecting strongly forward; eyes relatively small, not projecting; body brown.

Head: Moderately sized, weakly depressed between antennal bases; brown; clypeus extending forward from base of antenna by about width of first antennal segment, anterior edge with lateral angles weakly extended laterally; labrum narrower than clypeus, about 2× as wide as long, front edge concave, punctures strong, many almost confluent; setae numerous; moderately long; eyes of moderate size, distance between eyes about 4.4× dorsal width of eye, distance between bottom edge of eye and subgenal ridge width of about 15 eye facets, equivalent to about 0.55 diameter of eye, facets small. Antenna testaceous, elongate; segment 1 wide, subcylindrical, slightly depressed, segment 2 bean-shaped, about 0.5× length of segment 1, segment 3 narrow, slightly longer than segment 2, segment 4 about 2× as long as segment 3, expanding slightly to apex, about 4× as long as wide, segments 5–9 thin (segments 10–11 missing in studied specimens), subequal. Maxillary palpus light testaceous, segment 1 short, triangular, segments 2 and 3 subequal about 2× length of segment 1, segment 4 narrower and slightly longer than segment 3, finger-like. Labial palpus with segment 1 narrow, sinuate, expanded towards apex, segment 2 broad, triangular, segment 3 thinner, thumb-like, slightly curved, arising from end of segment 2. Paraglossa with semicircular margin, notched in central portion. Mandible stout, moderately broad, inner edge with 1 strong tooth and 1–2 weak teeth.

Pronotum: Testaceous; about 70% width of elytra, about 2.0× as wide as long, domed, posterior margin sinuate, anterior angles projecting strongly forward, posterior angles obtuse; punctures strong, weaker on disc than on head, becoming much stronger and nearly confluent towards sides; setae long.

Scutellar shield: Testaceous; subtriangular, weakly raised in centre, punctures smaller than on pronotum.

Elytra: Testaceous; humeral angles marked but not prominent, each with 3–4 weak longitudinal carina; sides subparallel for much of their length, very narrowly flanged; punctures well impressed, elongate, sparser but a little larger than those on disc of pronotum; setae long, dense, yellow.

Ventral surface: Testaceous; pronotal epipleura wide, slightly concave, surface rugose; pronotal process very narrow and strongly arched between coxae, anvil-shaped, apex rugose, pentagonal; accommodating notch on meso- ventrite well developed, wide, bordered; mesepisternum rugose, mesocoxae well separated; anterior triangular, central portion of metaventrite raised, bordered, strongly differentiated from rest of ventrite posteriorly; metacoxal plates transverse; elytral epipleura flat, wide at humeral angles, then rapidly narrowing, posterior half thin, punc- tures rugose; ventrites quite densely covered with small punctures, setae small. Metafemora narrow.

Male: Penis ( Fig. 2A ) (L 0.73 mm, W 0.35 mm): trigonium with deep triangular notch in apical portion, separated into two narrow processes, pointed at apices, distinctly shorter than parameroids; parameroids curved, straight in apical half, sharply pointed at apices; basal piece as long as trigonium. Tegmen ( Fig. 2B ) (L 0.66 mm, W 0.52 mm) bilobed, lobes wide gradually narrowing to apices, rounded at apices, without stylus. Sternite VIII ( Fig. 2C ) (L 0.29 mm, W 0.53 mm) relatively small, widely U-shaped, lightly sclerotized, with sparse setae at margin. Sternite IX ( Fig. 2D ) (L 0.53 mm, W 0.45 mm) V-shaped, apical portion membranous, with two oval brownish sclerites. Ter- gite VIII ( Fig. 2E ) (L 0.73 mm, W 0.69 mm) with large plate, apical portion densely covered with setae, apodemes short, diverging. Tergite IX ( Fig. 2F ) (L 0.72 mm, W 0.48 mm) much narrower than tergite VIII, with membranous apical portion devoid of setae, apodemes subparallel.

Female: Not known.

Etymology: the species is dedicated to Lisa A. Reichert, who collected the type specimens together with her husband, Darren Pollock.

Notes. The species is readily separated by its size: the total length of the two species known from New South Wales exceed 9 mm, and Daploeuros tasmanicus Watts , which is endemic to Tasmania, exceeds 7 mm in length. In contrast to D. lamingtonensis Watts and D. spencei (Armstrong) the trigonium of the penis of D. reichertae sp. nov. is much shorter than the parameroids. The penis of D. reichertae is similar to that of D. tasmanicus , but its trigonium has a relatively shallow subtriangular emargination, while it is completely divided in D. tasmanicus . The similarity of their male genitalia suggests that D. reichertae sp. nov. is closely related with D. tasmanicus .

Figures

FIGURE 1. Daploeuros species, dorsal view.A) D. lamingtonensis; B) D. spencei; C) D. reichertae sp. nov.; D) D. tasmanicus, male; E) D. tasmanicus, female. Scale bar = 5.0 mm.

FIGURE 2. Daploeuros reichertae sp. nov., male genitalia.A) penis; B) tegmen; C) sternite VIII; D) sternite IX; E) tergite VIII; F) tergite IX. Scale bar = 0.4 mm.