Notopilo xanthoimprocerus Bartlett & Lambkin 2022, sp. nov.

Notopilo xanthoimprocerus sp. nov. ZooBank registration: urn:lsid:zoobank.org:act: 332D1CD8-12CF-4547-8786-966A9BB0F98A (Figs 46, 84, 119, 160; Map 3) HOLOTYPE ♁: South Australia: S. Aust. 0.2km W Anvil Hole Native Well, Witjira NP, 26°21′27″S 135°42′27″E, pitfalls, 19-25 Nov 1995, Stony Desert Survey AL 03 (SAMA, database No. 25-021893). PARATYPES (3): South Australia: same data as holotype (1 ♀, SAMA); S. Aust. Andamooka, 4.7km SSE Stonwall Dam, 30°44′18″S 137°18′40″E, pitfalls, 11-5 Nov 1996, Stony Des. Surv. AN 002 (2 ♁, SAMA, database Nos. 25-021894, 25-021895). Diagnosis. Pronotum weakly rounded laterally, disc lightly punctate, appearing smooth; elytron yellowish with a brown semi-circular or triangular macula against the suture before the apical slope, punctation with lateral nodules, 8 th stria beginning between 3 rd and 6 th puncture of 7 th stria, most striae terminating near apical quarter, outer striae slightly before, interstriae with short semi-erect, and long erect, setae in single rows, intrafoveal setae long; legs entirely yellow, tarsi with three ventral tarsal pads. Description. Habitus: Fig. 160. Total length: 6.3–7.8 mm (holotye, 6.75 mm). Head: Cranium yellowish or brown, if brown then may be paler ventrally and with frons paler anteriorly; clypeus orange, labrum and palpi yellow, antennae yellowish or yellow-brown; vertex and frons smooth, with only seta-associated punctation, frons broad, eyes separated by 1.3–1.55 eye widths (holotype, 1.3), a pair of shallow impressions between eyes (difficult to observe; most clearly visible on specimen with darker cranium), clypeus mostly smooth, anterior margin moderately concave; genae wrinkled; terminal maxillary palpomeres with exterior margins from 1.5 (females) to 2 (males) times the length of inside edges; terminal labial palpomeres with exterior margins from 2.3 (females) to 2.8 (males) times the length of inside edges; antennae long, reaching beyond base of pronotum, segments elongate, slender; setae pale, eyes with erect setae, cranium with long and short, erect or medially-directed, setae. Prothorax: Entirely yellow; pronotum 1.14–1.23 times longer than wide (holotype, 1.14), sides slightly rounded, middle about as wide as pronotal arch, subapical depression poorly defined, v-shaped; central impression shallow, open; disc appearing smooth, seta-associated punctation inconspicuous; yellowish fine multi-directional setae and thicker long erect setae. Pterothorax: Ventrites yellow, with short yellowish posteriorly-directed and erect setae; elytra yellow, each elytron with a brown semi-circular or triangular macula against the suture before the apical slope; length to width ratio 2.34–2.48:1 (holotype, 2.48:1); punctation with small lateral nodules (high magnification required), punctation appearing larger than actual size due to visibility of subcutaneous component, most striae terminating near apical quarter, outer striae slightly before, 8 th stria beginning between 3 rd and 6 th puncture of 7 th stria; interstriae with fine semi-erect, posteriorly-directed, setae (about every puncture) and longer, thicker, erect setae (every 2–3 punctures), intrafoveal setae spanning entire puncture diameter; epipleurae extending well into apical curve; hindwing with CuA and CuA 1 cross-veins complete, MP 3+4 absent basad of CuA 1 crossvein. Legs: Femora and tibiae yellow, tibial carinae dark for short distance at base, tarsi yellow or brown, ventral tarsal pads yellowish; profemora only slightly more swollen than other femora. Abdomen: Ventrites yellow or pale orange. Male genitalia: Tegmen (Fig. 46) sinuate between tegminal arms and parameroid lobes, the apices of the latter acuminate-digitiform, dorsal sinus about one-third tegmen length, apically very open, ventral sinus about 70% as long; median lobe as in Fig. 84; pygidium as in Fig. 119. 3+4 Etymology. The specific epithet, xanthoimprocerus (from Greek ‘xanthos’ meaning yellow, and Latin ‘improcerus’ meaning short or undersized), refers to this species being the shorter of the two, primarily yellowish, flightless species. Variation. The colour of the head varies from pale yellowish to brown. Biology. Adults have been collected in pitfall traps during November. Distribution (Map 3). Notopilo xanthoimprocerus sp. nov. is known from arid regions of South Australia. Remarks. One dissected male, from Algebuckina Water Hole, South Australia (non-type specimen, SAMA), differs from the three males of the type series in having a more expansive brown triangular elytral maculation and slightly differently proportioned tegminal components. Examination of further specimens is required before the taxonomic status of this ‘form’ can be determined.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 pages 42-43, DOI: 10.11646/zootaxa.5220.1.1, http://zenodo.org/record/744129