Drilini are soft-bodied predatory click beetles with incompletely metamorphosed females. Approximately 150 described species are distributed in the Afrotropical, Palaearctic and Oriental realms, with the highest diversity known from sub-Saharan Africa. In this study, we describe Namibdrilusalbertalleni gen. et sp. nov. from Namibia which brings the total number of genera in Drilini to 16. The discovery of this unique taxon sheds new light on the diversity and evolution of the enigmatic paedomorphic beetle lineage and is interesting for several reasons. This new species is the only known representative of Drilini that has unidentate mandibles and lacks a hook on the dorsal part of the aedeagal median lobe, two of the few characters heretofore used for the unambiguous identification of members of this group. Furthermore, based on its morphology it belongs to a group of genera (Drilus clade) which heretofore contained only taxa from the Palaearctic Realm. We provide an updated diagnosis of the tribe Drilini, as well as an updated diagnosis and an identification key for the genera of the Drilus clade based on adult males. Further, we explain how to easily recognize adult Drilini from similar-looking soft-bodied elateroids like Elateridae: Omalisinae, Rhagophthalmidae, and Lampyridae: Ototretinae.

Department of Zoology Faculty of Science Palacky University 17 listopadu 50 77146 Olomouc Czech Republic Palacky University Olomouc Czech Republic

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Baalbergen E, Helwerda R, Schelfhorst R, Castillo Cajas RF, van Moorsel CHM, Kundrata R, Welter-Schultes FW, Giokas S, Schilthuizen M. (2014) Predator-prey interactions between shell-boring beetle larvae and rock-dwelling land snails. PLoS ONE 9(6): e100366. 10.1371/journal.pone.0100366 PubMed DOI PMC

Bocek M, Fancello L, Motyka M, Bocakova M, Bocak L. (2018) The molecular phylogeny of Omalisidae (Coleoptera) defines the family limits and demonstrates low dispersal propensity and ancient vicariance patterns. Systematic Entomology 43: 250–261. 10.1111/syen.12271 DOI

Crowson RA. (1972) A review of the classification of Cantharoidea (Coleoptera), with definition of two new families, Cneoglossidae and Omethidae. Revista de la Universidad de Madrid 21: 35–77.

Geisthardt M. (1977) Redeskription der weiblichen Imago von

Geisthardt M. (2007) Neue und bekannte

Geisthardt M. (2009) Order Coleoptera, family Drilidae. Arthropod fauna of the UAE 2: 159–163.

Hoffmannova J, Kundrata R. (2022) Diversity of the paedomorphic snail-eating click-beetle genus PubMed DOI PMC

Janisova K, Bocakova M. (2013) Revision of the subfamily Ototretinae (Coleoptera: Lampyridae). Zoologischer Anzeiger 252(1): 1–19. 10.1016/j.jcz.2012.01.001 DOI

Jiménez-Mejías P, Manzano S, Gowda V, Krell F-T, Lin M-Y, Martín-Bravo S, Martín-Torrijos L, Feliner GN, Mosyakin SL, Naczi RFC, Acedo C, Álvarez I, Crisci JV, Luceño Garcés M, Manning J, Moreno Saiz JC, Muasya AM, Riina R, Sánchez Meseguer A, et al. (2024) Protecting stable biological nomenclatural systems enables universal communication: A collective international appeal. BioScience 74: 467–472. 10.1093/biosci/biae043 PubMed DOI PMC

Kawashima I. (1999) The lampyrid beetles of the genus

Kawashima I, Lawrence JF, Branham MA. (2010) Rhagophthalmidae Olivier, 1907. In: Leschen RAB, Beutel RG, Lawrence JF. (Eds) Coleoptera, Beetles (Vol.2): Morphology and Systematics (Elateroidea, Bostrichiformia, Cucujiformia partim). In: Kristensen NP, Beutel RG (Eds) Handbook of Zoology, Arthropoda: Insecta. Walter de Gruyter GmbH and Co KG, Berlin/New York, 135–140. 10.1515/9783110911213.135 DOI

Kazantsev SV. (2010) New taxa of Omalisidae, Drilidae and Omethidae, with a note on systematic position of Thilmaninae (Coleoptera). Russian Entomological Journal 19(1): 51–60. 10.15298/rusentj.19.1.09 DOI

Kovalev AA, Kirejtshuk AG, Shapovalov AM. (2019) PubMed DOI

Kundrata R, Bocak L. (2011) The phylogeny and limits of Elateridae (Insecta, Coleoptera): is there a common tendency of click beetles to soft-bodiedness and neoteny? Zoologica Scripta 40: 364–378. 10.1111/j.1463-6409.2011.00476.x DOI

Kundrata R, Bocak L. (2017) Taxonomic review of Drilini (Elateridae: Agrypninae) in Cameroon reveals high morphological diversity, including the discovery of five new genera. Insect Systematics & Evolution 48: 441–492. 10.1163/1876312X-48022161 DOI

Kundrata R, Bocak L. (2019) Molecular phylogeny reveals the gradual evolutionary transition to soft-bodiedness in click-beetles and identifies sub-Saharan Africa as a cradle of diversity for Drilini (Coleoptera: Elateridae). Zoological Journal of the Linnean Society 187: 413–452. 10.1093/zoolinnean/zlz033 DOI

Kundrata R, Sormova E. (2018) DOI

Kundrata R, Baalbergen E, Bocak L, Schilthuizen M. (2015a) The origin and diversity of DOI

Kundrata R, Baena M, Bocak L. (2015b) Classification of Omalisidae based on molecular data and morphology, with description of Paradrilinae subfam. nov. (Coleoptera: Elateroidea). Zootaxa 3915(3): 413–422. 10.11646/zootaxa.3915.3.6 PubMed DOI

Kundrata R, Hoffmannova J, Hinson KR, Keller O, Packova G. (2022) Rhagophthalmidae Olivier, 1907 (Coleoptera, Elateroidea): Described genera and species, current problems, and prospects for the bioluminescent and paedomorphic beetle lineage. ZooKeys 1126: 55–130. 10.3897/zookeys.1126.90233 PubMed DOI PMC

Packova G, Kundrata R. (2023) A new species of PubMed DOI PMC

Packova G, Hoffmannova J, Kundrata R. (2021) Drilini (Coleoptera: Elateridae: Agrypninae) of Iran. The Coleopterists Bulletin 75(3): 579–586. 10.1649/0010-065X-75.3.579 DOI

Packova G, Brus J, Kazantsev SV, Kundrata R. (2024) New species and distributional records of the paedomorphic click-beetle genus DOI

Sormova E, Kramp K, Kundrata R. (2018) Diversity and phylogenetic relationships of DOI

Wittmer W. (1944) Catalogue des Drilidae E. Oliv. (Coleoptera - Malacodermata). Revista de la Sociedad Entomológica Argentina 12(3): 203–221.

Yiu V, Jeng ML. (2018) PubMed DOI PMC