Description: Total length ♂ 17.06 (N=5), ♀ 17.38 (N=4). General Structure (Figures 3A-B, 4A-B): Both sexes apterous, body long, narrow and cylindrical with elongate limbs and antennae. Typically found covered in resin, lending the animal a shiny appearance. Head (Figures 3A-B, 4A-B, 5A): elongate, more than twice as long as width across eyes, postocular portion slightly longer than antocular portion (excluding clypeus); dorsally with transverse sulcus behind eyes; covered with short, conical, apically setigerous tubercles, denser on anteocular portion; eye almost as tall as head when viewed laterally; ocelli absent; antennae 4-segmented, A1 longest, about as long as head and thorax combined; A2, A3 and A4 each almost ½ as long as A1; A3 and A4 curved; labium reaching middle of prosternum, L2 around twice the length of L1; L3 extremely short. Thorax (Figures 3A-B, 4A, 5A-B): with sparse distribution of short, conical, apically unisetigerous tubercles, particularly on anterior lobe of pronotum and laterally on meso- and metaplura; pronotum with narrow collar, laterally with setigerous tubercules; anterior lobe of pronotum globulose with shallow medial sulcus, at least twice as long as posterior lobe, lobes divided by transverse sulcus, posterior margin of pronotum weakly concave; mesonotum with posterior margin forming a U-shaped, upright carina; anterior of metanotum longitudinally sulcate, medially with prominent upturned U-shaped carina bearing lateral and submedial setigerous tubercles; prosternal stridulatory furrow distinct, bordered with erect setae. Abdomen (Figures 3A-B, 4A-C, 5A, E-F): spiracles of first segment dorsal, others on lateral, setigerous tubercles; abdominal tergites with prominent setigerous tubercles singly or in pairs; T7 with large posteromedial tubercle, in males large and upright, caudally conforming to medial process (mp) of pygophore, in females rounded, sometimes medially cleft, occasionally appearing as two distinct tubercles, and crowned with irregular, spinelike setae; connexiva folded inwards and upwards, giving abdomen elongate, parallel-sided appearance. Legs (Figures 3A-B, 4A-B, 5C-D): elongate; with mix of longer and shorter spinose setae, setae most dense on foretibia; fore- and mesocoxae nearly touching at midline, metacoxae separated; all legs with apex of femur swollen; foretibiae laterally compressed, slightly broader than meso- and metatibiae, narrowing slightly basally and apically; tibial comb on minor swelling; apex of foretibia behind tarsal insertion with dense patch of thick setae, those central in patch flattened, concave and paddle-like; tarsi 3-segmented. Male genitalia (Figure 6A-D): pygophore with sparse distribution of spinose setae; median process (mp) broad, projecting caudally and upwards, tapering to blunt apex; parameres simple, elongate and curved, with sparse distribution of spinose setae; endosoma dorsally with median basal sclerite (mbs) forming paired, paddle-shaped processes; beyond mbs a pair of elongate, membranous dorsolateral lobes (dll) and a larger, more apically sclerotized pair of ventrolateral processes (vlp); laterally with paired, lateral sclerotized processes (lsp) with narrowing, curved tips; at rest, these endosomal lobes and processes folding together. Colouration (Figures 3A-B, 8C): mostly black, with some orange to yellow and/or white markings, rarely almost entirely black. Head: black, often with thin orange to yellow markings behind eyes; antennae basally black, the remainder orange to yellow, A3 and A4 appearing slightly paler due to abundance of very short, adpressed white setae. Thorax: near uniform black, sometimes with small orange to yellow markings. Abdomen: mostly black, dorsally with some tubercles (typically those most caudal on segment) demarcated with orange to yellow, in some specimens this forms broad coloured sections crossing intersegmental margins, connexiva sometimes with small yellow, orange or white bands dorsolaterally. Legs mostly black, basal half of metafemur usually orange to yellow; metatibia sometimes becoming somewhat orange towards apex; tarsi orange. Rarely with legs all black, or with dark orange colouration on all legs.

Etymology: The specific epithet gajarrangarnang, derived from the Miriwoong language, spelled ‘gajarra-ngarnang’ meaning ‘spinifex dweller, ’ refers the grass (Triodia spp.) from which these assassin bugs extract resin. Miriwoong was once commonly spoken near the region where the type specimen was found, but is now a critically endangered language. This name alludes to both the fact that these assassin bugs are usually found associated with resinous species of Triodia, and that they cover themselves with resin from these plants. This name was suggested and approved by the Elders and language consultants who were contacted through the Mirima Dawang Woorlab-gerring Language and Culture Centre (https://mirima.org.au).

Measurements (in mm, range, with average in parentheses), see Table 1:

Male (N=5): length 16.53-17.58 (17.06); head length 3.14-3.48 (3.28); eye length 0.69-0.78 (0.73); interocular distance 0.66-0.76 (0.68).

Female (N=4): length 16.59-18.07 (17.38); head length 3.13-3.39 (3.29); eye length 0.64-0.79 (0.69); interocular distance 0.63-0.75 (0.69).

Distribution: Known from the Kimberley region of Western Australia (Figure 7).

Remarks: Gorareduvius gajarrangarnang sp. nov. and G. westraliensis are superficially quite similar, however several characters clearly separate the two. Most obviously, Gorareduvius westraliensis is generally larger (20.86 mm vs 17.06 mm total length) and nearly always has yellow and black forefemora (Figure 3C-D), while G. gajarrangarnang sp. nov. is smaller and typically has orange and black metafemora (Figures 3A-B, 8C). Both species may show some variation in this colouration, with nearly all-black specimens of both species observed. These, however, can be separated by their antennal colouration, with G. gajarrangarnang sp. nov. bearing yellow to orange antennae (Figures 3A-B, 8C), while those of its congener are black with yellow apices (Figure 3C-D). Additionally, many of the dorsal abdominal tubercles, which are prominent and often coloured in G. gajarrangarnang sp. nov. (Figure 8C), are more rounded and relatively smaller or entirely absent in G. westraliensis. The male genitalia are also diagnostic for each species (see Figure 6A-H). Both G. gajarrangarnang sp. nov. and G. westraliensis, exhibit a median basal sclerite (mbs) with paired, spatulate processes. In G. westraliensis, these have a midline carina on the outer surface and are positioned close together (Figure 6E), while in G. gajarrangarnang sp. nov. they lack a carina and are more widely separated (Figure 6A). Additionally, the apices of the lateral sclerotized processes (lsp) of G. gajarrangarnang are hooked and articulate with paired conjunctival ventrolateral processes (vlp) (Figure 6A-C), unlike in G. westraliensis, where the lsp are broad, rounded and almost touching along the midline when at rest (Figure 6E-G).

The general structure of the male genitalia in Gorareduvius is similar to that of Undiareduvius (Malipatil 1991a figures 7-10) and Trachylestes Stål (Malipatil 1991b figure 3), which are also characterised by the paired spatulate lobes of the medial basal sclerite and paired conjunctival and lateral lobes. This is in contrast to most other Australian Harpactorines, where the aedeagus is typified by an eversible sac-like endosoma armed with fields of small sclerotised spines (see Malipatil 1991b). This suggests these three genera share a common ancestry distinct from most other known Australian harpactorines, however this remains to be tested in a phylogenetic framework.

Both G. westraliensis and G. gajarrangarnang sp. nov. are found in the Kimberley region of Western Australia (Figure 7). Though distribution data is limited, it is worth noting that both species were found by FGS at El Questro, with G. westraliensis on the west side of the Pentecost River and G. gajarrangarnang sp. nov. on the east. Similarly, two specimens of G. westraliensis and one of G. gajarrangarnang sp. nov. were found in the WA Museum collection, all three collected at Mt Bell 26 July 1988 by T. F. Houston, with identical locality data (though with separate collector codes, suggesting separate collecting events in the same vicinity). At present there is not enough information to determine how the two species might diverge ecologically while maintaining overlapping distributions.