Ancyropilus, Bartlett & Lambkin, 2022

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, Zootaxa 5220 (1), pp. 1-81 : 11

Ancyropilus gen. nov.

ZooBank registration: urn:lsid:zoobank.org:act:AD29FEC9-897B-414B-B9BC-672F416BF2DE

Gender. Masculine.

Type species. Ancyropilus monteithi sp. nov.

Diagnosis. Intrafoveal seta short but visible under magnification; ninth elytral stria present; lateral rims of elytral punctures without internal nodules; most elytral striae reaching apices; ventral pad absent from all basitarsi; tegmen ventral sinus equal to, or longer than, dorsal sinus, anterior margin of pre-parameroid area weakly sclerotised; spicular fork V-shaped; median lobe with conspicuous rearward-directed apico-lateral spine.

Description. Eyes coarsely-facetted, strongly emarginate above supra-antennal elevations, separated by 0.36– 0.96 eye widths; antennal scape with carina bordering each side of flattened rear face; sensory face of terminal maxillary palpomere approximately 1–2 times longer than inside margin; sensory face of terminal labial palpomere approximately 1.9–3 times longer than inside margin; genae and submentum wrinkled; pronotum 1.1–1.35 times longer than wide, middle broader than anterior pronotal arch (most species) or as broad as pronotal arch ( A. monteithi sp. nov. and A. simplex sp. nov.), disc generally heavily punctate (smoother in appearance only in A. exossuarius sp. nov.), central discal impression often obscure, rarely distinctly sulcate; elytra 2.27–3.16 times longer than wide at humeri, punctures without nodules, eighth stria variable, beginning from base to within transverse maculate fascia, all or most striate reaching apical macula, interstriae of most species with more than one seta across strial width (only A. hornensis sp. nov. with rows of singular setae), short, fine, intrafoveal seta present; hindwing with CuA 3+4 and CuA 1 cross-veins complete, MP 3+4 basad of CuA 1 short (most species) or substantially extended (observed only in A. noonbahensis and A. simplex ), never completely absent; tarsi each with three well-developed ventral pads; spicular fork V-shaped; tegmen ventral sinus equal to, or longer than, dorsal sinus; median lobe with conspicuous rearward-directed apico-lateral spine.

Etymology. The generic epithet Ancyropilus (from Greek ‘ankyra’ meaning anchor, and the genus Opilo ) refers to the backward-directed apico-lateral spines of the median lobe evident in all dissected males.

Remarks. Conspicuous rearward-directed lateral spines of the median lobe are found in Ancyropilus , Culcipternulus and Infectostriatus , though the spines are less pronounced in the latter genus. Putatively, mutual synapomorphies of Ancyropilus , Culcipternulus and Infectostriatus in relation to eachother could be the loss of elytral puncture nodules in Ancyropilus and Culcipternulus versus the reduction in number of elytral striae in Infectostriatus , plus development of ventral basitarsal pads in Culcipternulus versus reduction in length of tegminal ventral sinus in Ancyropilus and Infectostriatus . Ancyropilus hornensis sp. nov., with unique parameroid lobe apices and reduced interstrial vestiture, is on the other hand retained within Ancyropilus as synapomorphic character development appears to be unidirectional.

Key to species of Ancyropilus

1 Each elytral interstice with a neat singular row of setae......... hornensis species group ( Ancyropilus hornensis sp. nov.)

- At least some elytral interstices with several setae across interval width (elytra often appearing densely setose as a result)............................................................................... 2 ( brigalowae species group)

2 (1) Elytral apices with a small pale macula isolated from outer and sutural margins, or apical macula completely lacking...... 3

- Elytral apices with macula complete to outer and sutural margins............................................... 4

3 (2) Legs entirely black; apical macula completely lacking ( Fig. 146 )......................... Ancyropilus simplex sp. nov.

- Legs not entirely black; apical macula not meeting margins ( Fig. 144 )............... Ancyropilus noonbahensis sp. nov.

4 (2) Femora predominantly yellow, only extreme base black; lateral bulge of pronotum shallow ( Fig. 143 ).............................................................................................. Ancyropilus monteithi sp. nov.

- At least basal half of femora black, and/or pronotum clearly rounded or angulate laterally............................ 5

5 (4) Elytral fascia rounded before or at suture................................................................... 6

- Elytral fascia straight or angulate and crossing suture......................................................... 7

6 (5) Elytra between base and fascia two-tone brown and black ( Fig. 147 )....................... Ancyropilus tricolor sp. nov.

- Elytra between base and fascia unicoloured black ( Fig. 138 ).......................... Ancyropilus brigalowae sp. nov.

7 (5) Elytral fascia extending along suture for a short distance ( Fig. 142 )......................... Ancyropilus labris sp. nov.

- Elytral fascia not extending along suture................................................................... 8

8 (7) Eighth elytral stria beginning between fascia and base.............................. Ancyropilus exossuarius sp. nov.

- Eighth elytral stria beginning within fascia, or at anterior margin of fascia........................................ 9

9 (8) Elytra without humeral maculation ( Fig. 139 )........................................ Ancyropilus emmotti sp. nov.

- Elytra with humeral maculation ( Fig. 145 ).................................... Ancyropilus packsaddlensis sp. nov.

Figures

FIGURES 138–149. Habitus: (138) Ancyropilus brigalowae, paratype; (139) Ancyropilus emmotti, holotype; (140) Ancyropilus exossuarius, paratype; (141) Ancyropilus hornensis, paratype; (142) Ancyropilus labris, holotype; (143) Ancyropilus monteithi, paratype; (144) Ancyropilus noonbahensis, holotype; (145) Ancyropilus packsaddlensis, holotype; (146) Ancyropilus simplex, paratype; (147) Ancyropilus tricolor, paratype; (148) Culcipternotus mareebensis, holotype; (149) Infectostriatus absentis, holotype (scale bars: 1.0 mm).