Ptomaphagus (Ptomaphagus) medius ( Rey, 1889), 1989

Schilthuizen, Menno, van Oostenbrugge, Wesley, Visser, Stefan, van der Meer, Marrit, Delval, Richard, Dias, Claudia, Köster, Heko, Maarschall, Rudie, Peeters, Norbert, Venema, Peter, Zaremba, Ryan, Beltrami, Cristina, Rossato, Marzia, Latella, Leonardo, Nieuwenhuis, Florinda, de Rop, Nicole, Njunjić, Iva, Perreau, Michel & Koene, Joris M., 2021, Ptomaphagus thebeatles n. sp., a previously unrecognized beetle from Europe, with remarks on urban taxonomy and recent range expansion (Coleoptera: Leiodidae), Contributions to Zoology 90 (1), pp. 1-20 : 13-16

Ptomaphagus (Ptomaphagus) medius ( Rey, 1889)

Nomenclature

Catops medius Rey, 1889 ( Rey 1889: 5) . Type series(from Lyon, Beaujolais,Collioure, and St. Raphael) in MC. Lectotype (here designated) in MC. Type locality: Pyrénées Orientales.

Catops miser Rey, 1889 ( Rey, 1889: 5) ; syn. n.

Ptomaphagus sericatus septentrionalis Jeannel, 1934 ( Jeannel, 1934: 169) ; syn. n.

Ptomaphagus sericatus medius ( Rey, 1889) ( Jeannel 1936: 87) .

Ptomaphagus ruthenus auct. (Sokolowksi, 1956) (misidentification).

Ptomaphagus medius ( Rey,1889)( Schilthuizen, 1989: 62-63) .

Ptomaphagus medius ( Rey,1889)( Schilthuizen, 2010: 2-3) .

Examined material

Type specimens

Lectotype (here designated): [pale blue round label:] “Pyrénées Orientales / “[male symbol]” / [Red label:] “ Catops medius / (Rey), male, LECTOTYPE / M. Schilthuizen design. 2016” 1 male in MC.

Lectotype of P. miser Rey (here designated): “ C. miser ”, no locality labels (therefore, probably from “région Lyonnais sensu lato” [Harold Labrique, pers. comm.]), [Red label:] “ Catops miser (Rey) , male, LECTOTYPE / M. Schilthuizen design. 2016”, 1 male in MC.

Syntype of P. miser Rey : “ C. miser ”, leg. Rey, no locality labels (therefore, probably from “région Lyonnais sensu lato”; [Harold Labrique], pers. comm.), 1 male in MC.

Holotype of Ptomaphagus septentrionalis : “ Schweden Alte Sammlung” / “TYPE” [red label] / “ Ptomaphagus sericatus septentrionalis ” 1 male in MNHN.

Other examined specimens

Denmark. East Sylland, Århus, Trondhjemsgade, compost with chicken leg, 7.v.1987, leg. Munk, 1 male in HNHM. Denmark, Veile, Bredballe, compost in garden, 7.viii.1994, leg. Munk, 1 male in HNHM. France. Crest, coll. A.Argod, 1male in MNHN.St.Guilhem,Hérault, 1 male in MNHN. St. Remy la V., 5.iv.1913, leg. R. du Buysson, 1 male in MNHN.Toulouse, ix.1904, leg. R. Jeannel, 1 male in MNHN. Marseille, coll. R. Jeannel, 1 male in MNHN. Pyrénées Orientales, Banyuls, iv.1905, coll. R. Jeannel, 1 male in MNHN. Aix-en-Provence, 1.ii.1922, coll. P. v.d. Wiel, 1 male in RMNH+ZMAN (ZMA.INS.1141394). France, iv.1899, coll. MacGillavry, 1 male in RMNH+ZMAN (RMNH.INS.631353). St. Guilhem, Hérault, leg. H. Lavagne, 1 male in RMNH+ZMAN (ZMA.INS.1141348). m. Minsmer, 1899, coll. D. v.d. Hop, 1 male in RMNH+ZMAN (ZMA. INS.1141342). Provence, Vendres, leg. Normand, 1 male in RMNH+ZMAN (ZMA.INS.1141079). Aix-en-Provence, leg. Tisson, 1 male in HNHM. Germany. Holstein, Oldenburg, Putlos, in hollow willow, 22.iv.1933, leg. K. Sokolowksi, 1 male in HNHM. Holstein, Eutin, 11.x.1930, leg. Sick, 1 male in HNHM. Hamburg vicinity, Todendorf, 23.x.1938, leg. K. Sokolowski, 2 males in HNHM. Hungary. Györ-M.-S.m., Osli, Tölösi-erdö, automobile-net, 18.30-19.00 h, 21.iv.2000, leg. O. Merkl, 1 male in HNHM.Györ-M.-S.m., Dénesfa, woody pasture, 29.iii.2000, leg. A. Podlussány, 1 male in HNHM. Spain. Barcelona, iii-iv.1927, 2 males in MNHN. Lérida, Cuevas clares de Gurp, xi.1920, leg. Zariquiey, 1 male in MNHN. Lérida, Noves de Segre, Forat de l’Infern, x.1929, leg. Dr. Zariquiey, 1 male in MNHN. The Netherlands. Oegstgeest, Leidse Hout, ii-iv.2011, leg. D. v.d. Horst, 8 males in RMNH+ZMAN (RMNH.INS.63318-63321, RMNH.INS.549254, RMNH.INS.549292, RMNH. INS.549309-549310). De Blaauwe Kamer (nr. Wageningen), in flood debris, 28.xii.2012, leg. Dick Belgers, 3 males in RMNH+ZMAN (RMNH.INS.63331-63333). Arnhem, Koningsheide, 26.vi-31.x.2013, leg. A. den Dees, 4 males in RMNH+ZMAN (RMNH.INS.63331- 63333, 63343). Amsterdam, Vondelpark, 6.iii-7.v.2019, leg. Schilthuizen & Van der Meer, 41 males in TXEX. United Kingdom. Chichester, E. Tottenham, coll. P. v.d. Wiel, 1 male in RMNH+ZMAN (ZMA.INS.1141143). UK, leg. Harwood, 1 male in MNHN. Kent, Wye, leg. B.S. Harwood, 1 male in MNHN.

Antennae (fig. 3c) more slender than in P. sericatus and P. thebeatles : 6TH antennomere c. 1.5 times as wide as long in the female, less than 1.5 times as wide as long in the male. Aedeagus (fig. 4a) in dorsal view gradually narrowed into a sharp point, in lateral view regularly bent ventrad. Apical orifice relatively far before the apex.

Distribution

The historical specimens suggest the species was, until recently, restricted to western and northern Europe ( Sweden, Denmark, England, the Netherlands, northwestern Germany, France, northern Spain; fig. 5). However, the recent records from Canada (based on DNAbarcodes and imaged specimens in BOLD) and Hungary (among the large material of sericatus -group from Hungary in HNHM, the only true P. medius were of recent date) suggest that, like P. thebeatles , P. medius has recently undergone range expansions.

Notes

Jeannel (1934, 1936) described P. sericatus subsp. septentrionalis as a Scandinavian taxon, differing from medius by the more slender antennae and aedeagus. There is some variation in these traits within medius , but we failed to find consistent differences that would justify the recognition of a separate taxon. Although since Jeannel, most authors have ignored septentrionalis , we here for the first time formally synonymise it with P. medius .

DNA barcodes

All confirmed P. medius DNA-barcodes from Europe fall within the BIN AAU6931 of BOLD. The same BIN also contains a large number of BOLD-records collected in a 400-km wide strip north of Lake Ontario, Canada. Genetic distances with P.sericatus and P.thebeatles are c. 5% (fig. 7).