Panaetius trabifer Horváth, 1902

Panaetius trabifer Horváth View in CoL

Figures 1 View Fig , 5 View Fig , 6 View Fig , 7 View Fig , 8 View Fig , 9 View Fig , 11 View Fig , 12 View Fig

Panaetius trabifer Horváth 1902: 602 (original description); Kirkaldy 1909: 170 (catalogue); Cassis and Gross 2002: 372 (Australian catalogue).

Diagnosis. Panaetius trabifer is distinguished by the following characters: anterolateral processes of pronotum slender ( Fig. 7d View Fig ); humeral horns greatly elongate, laterally oriented, with posterior tooth directed posteriorly ( Fig. 1 View Fig ); humeral horns yellowish brown, with margins dark brown ( Fig. 1 View Fig ); laevigate midline stripe on pronotum ( Fig. 1 View Fig ); MTG peritreme directed posterolaterally ( Fig. 8d View Fig ); parameres apically rounded ( Fig. 5b View Fig ); and aedeagus lacking ventral conjunctival lobes ( Fig. 5c,d View Fig ).

Redescription. Male. Total length 5.23–5.47 mm ( Table 2 View Table 2 ). COLOURATION ( Fig. 1 View Fig ). Yellowish brown. Head: dark brown markings, more dense at base and lateral margin of anteclypeus. Eyes: shining, brown, with medial and posterior margin yellow. Antennae: AI-AIV medium to dark brown. Labium: LI-LIII pale brown; LIV dark brown. Pronotum: yellowish brown, with dark brown markings; callus yellowish brown, sometimes indistinct, with dark brown markings around and intersected by a laevigate pale brown midline stripe; anterolateral processes of pronotum yellowish brown; humeral horns yellowish brown, with margins dark brown; one distinct spine dorsally, with margin dark brown. Scutellum: yellowish brown at base, V-shaped medium brown stripe at apex, with dark brown markings and more dense at base; triangular dark brown stripe at base, with a medial longitudinal dark brown stripe, sometimes almost reaching to apex. Thoracic pleura: propleura pale brown, with dark brown markings; mesopleura yellowish brown, with wide dark brown stripe at medial region; metapleura dark brown, with a large yellowish brown spot along lateral margin. MTG: anterior region of evaporative area yellowish brown; lateral and posterior regions dark brown, almost black. Hemelytra: yellowish brown, with medium brown stripe along medial fracture; membrane almost transparent, a large irregular dark brown spot near inner base of membrane; veins dark brown. Legs: mostly pale brown; femora medium brown near apex; tibiae medium brown, with pale brown bands medially and apically, medial bands ca. 2× longer than apical bands; tarsi medium brown; claw black apically. Abdomen: connexiva uniformly pale brown, sometimes brown bands at base; venter medium brown with dark brown stripe laterally; abdominal spine of sternite III medium brown. STRUCTURE. Head: paraclypei flat, arcuate distally and contiguous. Antennae: AIII-AIV slightly wider than other segments. AI shortest segment, not passing anterior margin of head; AII(a) longest segment, ca. 2× longer than AI; AII(b) about as long as AIV; AIII slightly shorter than AII(a); AIV ca. 4/5th length of AII. Labium: reaching mesocoxae or a little beyond; LI slightly wider than LII and LIII; LII about as wide as LIII; LIV slightly thinner than LII; LII longest, ca. 2× longer than LI; LIII ca. 1.5× longer than LI; LIV slightly shorter than LIII. Pronotum: anterolateral processes of pronotum broad at base, rounded and dorsally recurved at apex; humeral horns elevated dorsally, apically bifid, anterior tooth short, oriented laterally, posterior tooth more robust, oriented posteriorly. Scutellum: flat, slightly longer than wide. MTG: external efferent system as in genus description; mesepimeron without evaporative bodies ( Fig. 8d View Fig ). Legs: hind femora slightly broader and longer than mesofemora; tarsi narrow, tarsal segment I short, segment II about 2–3× longer than segment I. Abdomen: posterior angles of connexival segments, apically rounded and weakly recurved. Male genitalia: pygophore ( Fig. 5a View Fig ); parameres broad, knife-shaped, apex rounded and medially curved inwardly, with a short black line near apical margin, dense hairlike at apex of lateral margin ( Fig. 5b View Fig ); aedeagus with a pair of basal lateral and dorsal conjunctival lobes ( Fig. 5c,d View Fig ).

Female. Total length 5.76–6.46 mm ( Table 2 View Table 2 ). COLOURATION. Brownish grey. Head: dark brown marking, most pronounced at base and lateral margin of paraclypei and anteclypeus. Eyes: reddish brown, with medial and posterior margins yellowish brown. Antennae: AI-AIV mostly pale brown. Labium: LII and LIII pale brown. Pronotum: impunctate pale brown stripe on medial regions of humeral horns. Legs: tarsi pale brown, with reddish tinge. Abdomen: venter brown with red stripes laterally medial to spiracles; abdominal spine of sternite III pale brown. STRUCTURE. Abdomen: Pendergrast’s organs ( Fig. 9d View Fig ). Female genitalia: capsula seminalis small, short, recurved ( Fig. 6d View Fig ); thickenings of vaginal intima bifid ( Fig. 6d View Fig ); medial region of sclerotised rings more elevated than lateral region ( Fig. 6d View Fig ).

Specimens examined. AUSTRALIA: New South Wales: 1♀, E. Dorrigo NSW , 29 Dec (year unknown), W. Heron (00002767) ( AM) ; 1♀, Dorrigo , NSW, Nov 1928, W. Heron (00002768) ( AM) ; 1♂, Brooklana , E. Dorrigo, 1929, W. Heron (00002766) ( AM) ; 1♀, Salisbury , 18 Oct 1971, R. Menzies (00002784) ( QM) ; 1♂, 32.08°S 151.27°E, Allyn River, Chichester State Forest , 10–11 Nov 1981, T. Weir and A. Calder (00002764) ( AM) GoogleMaps ; 1♀, 30.21°S 152.47°E, Dorrigo National Park , Never Never picnic site, 6 Apr 1993, C. Reid (00002769) ( AM) GoogleMaps . Queensland: 1♂, Mt. Tamborine , Oct 1924, A. Musgrave and C. Gelssmann (00002765) ( AM) ; 1♀, Tooloom , Jan 1926, H. Hacker (00002786) ( QM) ; 1♀, Brisbane , Qld, R. Kumar (00002783) ( QM) ; 2♂♂, National Park , Nov 1923, H. Hacker (00002792) ( QM) ; 1♂, National Park , Dec 1923, H. Hacker (00002793) ( QM) ; 1♂ 1♀, Bunya Mountains , 10 Nov 1925, H. Hacker (00002791) ( QM) ; 1♂ 1♀, Mt. Glorious , 18 Sep 1927, H. Hacker (00002790) ( QM) ; 1♂, National Park , 04 Jun 1929 (00002789) ( QM) ; 1♀, Lamington National Park , Queensland, 20 Aug 1962, G. Monteith (00002787) ( QM) ; 2♀♀, Lamington National Park , Queensland, 03 Feb 1963, G. Monteith (00002782, 00002785) ( QM) ; 1♀, Mt. Glorious , Basset site, 700 m, Argyrodendron actinophyllum ( Malvaceae ), Jan 1988, Y. Basset (00002781) ( QM) ; 1♂, Mt. Glorious , Basset site, 700 m, Argyrodendron actinophyllum ( Malvaceae ), Mar–Apr 1988, Y. Basset (00002788) ( QM) .

Plant associations. As with Panaetius laevicornis , this species was collected on Argyrodendron actinophyllum ( Malvaceae ), but only a pair of specimens was collected on it, and we do not hypothesise it as a host plant.

Distribution. Distributed in coastal New South Wales and Queensland ( Fig. 11 View Fig ).

Remarks. See Remarks section of P. eliasi , P. laevicornis and P. lobulatus for differential diagnosis.