Panaetius trabifer Horvath 1902
Creators: name: Wang, Xiao-Jing
name: Liu, Guo-Qing
name: Cassis, Gerasimos
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Acanthosomatidae
Panaetius
Panaetius trabifer

description: Panaetius trabifer Horváth
Figures 1, 5, 6, 7, 8, 9, 11, 12
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); humeral horns greatly elongate, laterally oriented, with posterior tooth directed posteriorly (Fig. 1); humeral horns yellowish brown, with margins dark brown (Fig. 1); laevigate midline stripe on pronotum (Fig. 1); MTG peritreme directed posterolaterally (Fig. 8d); parameres apically rounded (Fig. 5b); and aedeagus lacking ventral conjunctival lobes (Fig. 5c,d).
Redescription. Male. Total length 5.23–5.47 mm (Table 2). COLOURATION (Fig. 1). 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). 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); 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); aedeagus with a pair of basal lateral and dorsal conjunctival lobes (Fig. 5c,d).
Female. Total length 5.76–6.46 mm (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). Female genitalia: capsula seminalis small, short, recurved (Fig. 6d); thickenings of vaginal intima bifid (Fig. 6d); medial region of sclerotised rings more elevated than lateral region (Fig. 6d).
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); 1♀, 30.21°S 152.47°E, Dorrigo National Park, Never Never picnic site, 6 Apr 1993, C. Reid (00002769) (AM). 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).
Remarks. See Remarks section of P. eliasi, P. laevicornis and P. lobulatus for differential diagnosis.
description: Published as part of Wang, Xiao-Jing, Liu, Guo-Qing & Cassis, Gerasimos, 2015, Revision of Panaetius Stål (Hemiptera: Heteroptera: Acanthosomatidae) from Australia, including the description of two new species and phylogenetic analysis, pp. 445-464 in Austral Entomology 54 (4) on pages 462-463, DOI: 10.1111/aen.12154, http://zenodo.org/record/15299076