Ancyropilus hornensis Bartlett & Lambkin 2022, sp. nov.

Ancyropilus hornensis sp. nov. ZooBank registration: urn:lsid:zoobank.org:act: 91850EDB-374C-48AE-BB1E-28B7B0E321E2 (Figs 35, 74, 110, 141; Map 1) HOLOTYPE ♁: Northern Territory: Horn Islet Pellew Group, N.T. 15-21 Feb. 1968 B. Cantrell (QM, type reg. T258549). PARATYPES (2): Northern Territory: Horn Islet Pellew Group, N.T. 15-21 Feb. 1968 B. Cantrell (1 ♁, QM); Horn Islet Sir Edward Pellew Group, N.T. 15-21.ii.1968 B. Cantrell (1 ♀, QM). Diagnosis. Pronotum rotund (sub-globose); elytra dark with orange humeral fasciate and apical maculations (humeral maculae less well-defined), 8 th stria beginning near anterior margin of fascia or within fascia, striae reaching apical maculae, interstrial setae not dense as in other Ancyropilus species; femora yellow basally, brown apically, tarsi with three ventral tarsal pads. Description. Habitus: Fig. 141. Total length: 7.3–9.8 mm (holotype, 8 mm). Head: Vertex and frons black to dark brown, clypeus reddish black or brown, anteclypeus semi-transparent orange, labrum, antennae and palpi orange to orange-brown; eyes separated by about 0.54–0.65 eye widths (holotype, 0.54); vertex and upper part of frons punctate-rugulose, lower part of frons (above epistomal suture) transversely rugulose with occasional punctation near eye margins; clypeus relatively heavily punctate; genae and submentum wrinkled; exterior margins of terminal palpomeres about 1.5 times (maxillary) and 2 times (labial) the length of inside edges; antennae not reaching base of pronotum; eyes and cranium with long erect pale setae, frons and vertex with denser shorter medially-directed setae. Prothorax: Dark brown, pronotal arch and basal collar generally paler than disc, prosternum dark to pale brown; pronotum robust (sub-globose), about 1.14–1.25 times longer than wide (holotype, 1.14), sides rounded to subtly angulate, middle wider than pronotal arch; subapical depression v-shaped, central impression obsolete; disc moderately punctate though with a smooth reflective general appearance, punctures more dense laterally, a medial glabrous stripe in basal half, base with paired paramedical glabrous tumescences, anterior paramedical tumescent areas partly glabrous; disc with fine short multi-directional setae and sparser long erect setae. Pterothorax: Ventrites dark orange-brown, with fine pale posteriorly- or medially-directed setae; elytra dark brown with yellow-orange markings (each elytron with a weakly defined humeral macula running obliquely towards but not reaching the suture, a broad median fascia that crosses the suture and is broadest laterally—anteriorly meeting the humal macula in the female paratype, plus a trigonal apical macula), length to width ratio 2.62–2.72:1 (holotype, 2.72:1); 8 th stria beginning near anterior margin of median fascia, or within fascia (after about 7–10 punctures from base of the 7 th stria), all ten striae reaching apical macula, or 6 th and/or 10 th striae terminating before apical macula; punctation circular, without nodules, diameter of apical punctation similar or slightly smaller than diameter of basal punctures, striae separated by approximately one puncture diameter; epipleurae extending into apical maculae; interstrial setae generally arranged single-file along striae (two setae across strial width observed in striae posterior of median fascia); intrafoveal setae shorter than puncture diameter in the two observed males and as long as puncture diameter in the only known female specimen. Legs: Approximately basal half of profemora and basal three-fifths of mesoand metafemora yellow, remaining parts of femora brown; tibiae and tarsi brown, tibial carinae darker; ventral tarsal pads yellowish; meso- and metafemora slender, profemora weakly swollen. Abdomen: Ventrites brown. Male genitalia: Tegmen (Fig. 35), widest near middle, slightly narrowed between middle and parameroid lobes (the apices of which are tapered to a slender, pronounced, slightly inwards-directed digitiform process), dorsal sinus just under one-third tegmen length, ventral sinus about as long as dorsal sinus, apodeme very short, about one-fifthteenth tegmen length; median lobe as in Fig. 74; pygidium as in Fig. 110. Etymology. This species is named after the type locality of Horn Islet, of the Sir Edward Pellow group of islands located in the south-west corner of the Gulf of Carpentaria, Northern Territory. Biology. All three adult specimens were collected in mid-February. Distribution (Map 1). Ancyropilus hornensis sp. nov. is so far known only from Horn Islet, a small rocky landmass about 2 km long, near the larger Centre Island.Published as part of Bartlett, Justin S. & Lambkin, Christine L., 2022, Australian Opilonini (Coleoptera: Cleridae: Clerinae) part I: A revised taxonomy for Australian Opilo Latreille including descriptions of new genera and species, pp. 1-81 in Zootaxa 5220 (1) on page 25, DOI: 10.11646/zootaxa.5220.1.1, http://zenodo.org/record/744129