A Junior Synonym of Plastocerus Thoracicus, with Nomenclatural Notes on Plastocerus (Coleoptera: Elateridae: Plastocerinae)
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2020 ACTA ENTOMOLOGICA 60(2): 391–396 MUSEI NATIONALIS PRAGAE doi: 10.37520/aemnp.2020.23 ISSN 1804-6487 (online) – 0374-1036 (print) www.aemnp.eu SHORT COMMUNICATION Binhon atrum Pic – a junior synonym of Plastocerus thoracicus, with nomenclatural notes on Plastocerus (Coleoptera: Elateridae: Plastocerinae) Ji ří HÁJEK1), Michael A. IVIE2) & John F. LAWRENCE3) 1) Department of Entomology, National Museum, Cirkusová 1740, CZ-19300 Praha 9 – Horní Počernice, Czech Republic; e-mail: [email protected] 2) Montana Entomology Collection, Marsh Labs, Room 50, Montana State University, 1911 W. 6 Lincoln Street, Bozeman, MT 59717, USA; e-mail: [email protected] 3) Australian National Insect Collection, CSIRO, GPO 1700, Canberra, ACT and 61 Glenbar Road, The Palms, QLD, Australia; e-mail: [email protected] Accepted: Abstract. Binhon atrum Pic, 1922, an enigmatic genus and species described in the family 9th June 2020 Dascillidae based on a single female from Vietnam, is illustrated, diagnosed and formally Published online: synonymised with Plastocerus thoracicus Fleutiaux, 1918 (Elateridae: Plastocerinae). The 17th June 2020 species is recorded from China (Guangxi, Yunnan) for the fi rst time. The taxonomic history of the genus Plastocerus Schaum, 1852 (not Plastocerus LeConte, 1853) with emphasis on its synonyms, is briefl y summarised. Key words. Coleoptera, Dascillidae, Elateridae, Binhon, Plastocerus, new synonym, new records, China, Vietnam, Oriental Region Zoobank: http://zoobank.org/urn:lsid:zoobank.org:pub:AD67D5CD-E5B0-4CC6-8CA1-D11D2E6B6DDD © 2020 The Authors. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Licence. Introduction While the biggest problem in Pic’s species-group Maurice Pic (1866–1957), an eminent French coleo- taxa are the varieties – largely overlooked by other en- pterist of the turn of 19th and 20th Centuries, described tomologists – but representing available (and in many more than 20,000 species and varieties as well as several case also valid) names (e.g. H 2011, B hundred genera across many families of Coleoptera (V- R 2015), another problem is that his new genera 1958, C 2006). Like several entomologists in sometimes lack explicit family assignment, which has the 19th Century, Pic described taxa from almost all beetle led to misplacement or even omission of many taxa by groups from all parts of the world. Generally speaking, he subsequent entomologists. This problem has only been described anything which did not have a name in his (rather addressed recently, with the study of authentic material chaotically organized) reference collection, without much in Pic’s collection (see, e.g., I 2002, P 2005, eff ort to check for names that already existed elsewhere I P 2012). One of the enigmatic genera (C 2006). Consequently, he produced a great described by Pic is the monotypic Binhon Pic, 1922, with number of synonyms, including repeated descriptions the species Binhon atrum Pic, 1922 from the locality of the same taxon. Among his contemporaries, Pic was Hoa Binh in northern Vietnam (P 1922). The genus already infamous for very short and uninformative descrip- and species were described based on a single female, tions, insuffi cient for recognition of the taxon concerned. and placed in the family Dascillidae, but close to the A large proportion of these descriptions were published Neotropical genus Aploglossa Guérin-Méneville, 1849 in his three private journals: L’Échange, Révue Linnéenne (currently Ptilodactylidae: Aploglossinae). Although P (1885–1956, 543 issues), Mélanges Exotico-Entomolo- (1926) added subsequent information about the males of giques (1911–1939, 71 issues), and Opuscula Martialis Binhon, neither the fi ve-line long Latin description, nor (1940–1944, 13 issues). the supplementary information, provide suffi cient infor- Hajek.indd 391 17.06.2020 15:29:14 392 HÁJEK et al.: Binhon atrum Pic – a junior synonym of Plastocerus thoracicus (Coleoptera: Elateridae) mation to allow recognition of the beetle. Therefore, it bed Californian species, Plastocerus schaumii LeConte, is not surprising that Binhon has never been mentioned 1853, which led to a diff erent, broader concept of the in any entomological literature since 1926, either within genus for many years. L (1857) and C- Dascillidae (cf. J et al. 2013), or Ptilodactylidae (cf. (1863) correctly attributed Plastocerus to Schaum, S 1986). Only the fi nding of the type specimen but accepted LeConte’s broad defi nition to include both of Binhon in Pic’s collection of Dascillidae in the Mu- the Palaearctic and Nearctic species. Subsequently, séum national d’Histoire naturelle, Paris, enabled us to apparently considering the Nearctic species as the ‘true’ clarify the identity of this enigmatic beetle and propose Plastocerus, H (1883) proposed a new genus name the following synonymy with Plastocerus Schaum, 1852. Ceroplastus for the Palaearctic taxon; unfortunately, as As the classifi cation of Plastocerus Schaum, 1852 (not he did it again only in a catalogue and without descripti- Plastocerus LeConte, 1853) is rather complicated, and on, several authors considered the name as unavailable. several of its synonymies are missing from the recent These authors (e.g. H 1921) incorrectly attributed literature (cf. B 2007), the taxonomic history of the the name Ceroplastus to S (1888a,b), who gave a genus Plastocerus Schaum is summarised. redescription of the taxon in the generic part of both his ‘Fauna Baltica’ and ‘Fauna Transsylvanica’. The female of Plastocerus angulosus was described Materials and methods by R (1896) as a new genus and species: Pseudo- Habitus photographs were taken using a Canon EOS phyllocerus atricolor Reitter, 1896; but its synonymy was 550D digital camera with an attached Canon MP-E65mm soon recognized by S (1897). S (1902) f/2.8 1–5× macro lens, as numerous separate images at was the fi rst author to explicitly state that the Palaearctic diff erent focal planes and afterwards combined using and Nearctic Plastocerus species were not congeneric. He Helicon Focus 6.3.0 software. attributed the Palaearctic taxon name to C (1863) See B (2010) and B et al. (2018) for and thus incorrectly considered it junior to LeConte’s morphological terminology and detailed redescription of name, so he proposed another replacement name, Clado- Plastocerus. cerus Schwarz, 1902. Schwarz’s name was immediately The material mentioned in this study is deposited in the synonymised by H (1902), who pointed out that his following collections: name Ceroplastus was senior – although he mentioned ANIC Australian National Insect Collection, CSIRO Australian the later ‘Catalogus coleopterorum Europae, Caucasi National Research Collections, Canberra, ACT, Australia; et Armeniae rossicae’ (H et al. 1891), and not the MNHN Muséum national d’Histoire naturelle, Paris, France; original ‘Catalogus coleopterorum Europae et Caucasi’ NHMB Naturhistorisches Museum Basel, Switzerland; (H et al. 1883). In addition, H (1902) noted NMPC National Museum, Prague, Czech Republic. that Cladocerus Schwarz is a junior homonym of Cla- docerus Kirsch, 1865: 68 (Coleoptera: Lycidae) [in fact, Systematics K (1865) described Cladoceras; Cladocerus is its Plastocerus Schaum, 1852 unjustifi ed emendation by G H (1869: 1633)]. For the next 70 years, Plastocerus was considered Plastocerus Schaum, 1852: 49. Type species: Callirhipis angulosus Germar, 1844 (by monotypy). to be an American genus and Ceroplastus was the genus Ceroplastus Heyden, 1883 in H et al. (1883: 111), as an unnecessary occurring in the Old World, until C (1972) cor- replacement name for Plastocerus Schaum, 1852 [not Plastocerus rected the usage: recognizing Plastocerus Schaum, with LeConte, 1853]. Ceroplastus as its junior synonym, for the Mediterranean Pseudophyllocerus Reitter, 1896: 234. Type species: Pseudophyllocerus species, and replaced Plastocerus LeConte with its junior atricolor Reitter, 1896 (by monotypy); synonymized by S (1897: 64). synonym Octinodes Candèze, 1863. Cladocerus Schwarz, 1902: 200, as an unnecessary replacement name S (1852) originally placed Plastocerus in for ‘Plastocerus Cand.’ [= Plastocerus sensu C (1863); i.e. the family Cebrionidae. However, L (1857) Plastocerus Schaum, not Plastocerus LeConte]. included Plastocerus in the family Elateridae, where, Binhon Pic, 1922: 29. Type species: Binhon atrum Pic, 1922 (by mono- with the single sojourn to the Rhipiceridae in H typy); syn. nov. (1921), it remained until C (1972) placed it in Comments on the classifi cation. The genus Plastocerus its own family, Plastoceridae. Quite recently, B et was proposed by S (1852) in his ‘Catalogus Co- al. (2018) and K et al. (2018) revised the taxonomic leopterorum Europae’ for Callirhipis angulosus Germar, placement of Plastocerus using molecular analysis and 1824, an enigmatic elaterid species from the Eastern Me- downgraded its status to the subfamily Plastocerinae, diterranean (Greece, Turkey, Syria and Israel – see P back in the family Elateridae. However, the family group N 2011). Although Schaum’s act fully conforms name Plastoceridae Crowson, 1972 is a junior homonym with the conditions of ICZN (1999: Article 12.2.5), many of Plastocerini LeConte, 1861. Although B subsequent authors considered the genus a nomen nudum et al. (2011) called for a petition to the International and thus formally unavailable. Most importantly of the Commission on Zoological Nomenclature to suppress authors who thought Schaum’s name invalid, LC the LeConte name, no such petition is listed