The genus Colydium Fabricius in Europe (Coleoptera, Zopheridae, Colydiinae) with description of a new species, Colydium noblecourti sp. nov. Parmain, Guilhem Eckelt, Andreas Schuh, Rudolf Deutsche Entomologische Zeitschrift 2024 2024-10-28 71 2 289 301 Parmain & Eckelt & Schuh 2024 Insecta Zopheridae Colydium Animalia Coleoptera Arthropoda species noblecourti sp. nov.   Figs 1 A – E, 5, 6   Type locality.  Austria, Wien, 13. Bezirk, Lainzer Tiergarten, Johannserkogel, 320 ma. s. l.,  48°11'36"N, 16°13'10"E.   Type material.    Holotype• ♂(Fig. 1 A–E); Original label: “ AUT. W. Lainzer Tiergarten, Johannserkogel N, 16.21968/ 48.19335  320 m,  28. IV. 2016leg. Eckelt A.” “ DNA Barcode, TLMF Col 00203 ” “ HOLOTYPE ♂,   Colydium noblecourti sp. nov., des. Parmain, Eckeltand Schuh2024 [red printed label] ” (  TLF).  Paratypes. ( 250 exx.);   Andorra• 1 ♀; La Massana;  16. Jan. 1998, H. Brustelleg. (  HB)•  3 ♂; La Massana,  25. Feb. 2008, H. Brustelleg. (  HB).   Austria–  Wien• 1 ♀; Lainzer Tiergarten;  24. Jul. 1965; Voglleg. (  CSW)•  1 ♂; Lainzer Tiergarten;  8. May 1996; E. Holzerleg. (  CSW)•  1 ♂; Lainzer Tiergarten,  2. Jul. 1966; C. Holzschuhleg. (  CSW)•  1 ♂; Lainzer Tiergarten, Johannser Kogel, Nordseite,  300 ma. s. l.;  19. Apr. 1995; M. Kahlenleg. (  TLF)•  1 ex.; Lainzer Tiergarten,  Aug. 1954; F. Schubertleg. (  NMW)•  1 ex.; Lainzer Tiergarten,  29. Jul. 1951; C. Holzschuhleg. (  CHV)•  1 ex.; Lainzer Tiergarten,  6. Sep. 1969; C. Holzschuhleg. (  CHV)•  1 ex.; Lainzer Tiergarten,  14. May 2007; W. Hanselyleg. (  CSW)–   Niederösterreich• 2 exx.; Wienerwald; Kubinyileg. (  CHV)•  1 ex.; Wien Umgebung, Mariabrunn;  22. May 1966; C. Holzschuhleg. (  CHV)•  2 exx.; Lunz; Kaufmannleg. (  NMW)•  1 ex.; Wien Umgebung; Haberditzleg. (  NMW)•  1 ex.; Wien Umgebung; Hoffmannleg. (  NMW)•  1 ex.; Klosterneuburg, Donau-Auen;  7. Apr. 1947; Lechnerleg. (  NMW)•  1 ex.; Klosterneuburg, Wienerwald;  8. Apr. 1947; Lechnerleg. (  NMW)•  2 exx.; Pressbaum;  21. Mar. 1948; Lechnerleg. (  NMW)•  1 ♂, 1 ♀; Bez. Wiener Neustadt, Bad Fischau, Kürassier,  400 ma. s. l.;  15. Apr. 1990; R. Schuhleg. (  CSW)•  1 ♂, 1 ♀; Wiener Neustadt,  1 kmSSE Feuerwerksanstalt;  7. Jan. 2007; R. Schuhleg. (  CSW)•  1 ♀; Bez. Neunkirchen, Raxgebiet, Hinternasswald,  800 ma. s. l.;  23. May 2005; W. Hanselyleg. (  CSW)•  1 ♀; Wiener Neustadt, Föhrenwald;  10. Apr. 1993; R. Schuhleg. (  CSW)•  1 ♂; Bez. Baden, Helenental, Hoher Lindkogel, Nordseite, Umg. Cholerakapelle,  300 ma. s. l.;  11. May 2024; R. Schuhleg. (  CSW)•  1 ♂; Neulengbach;  2. Apr. 1980; A. Dostalleg. (  CSW)–   Burgenland• 6 ♂, 6 ♀; Bez. Mattersburg: Gruskogel Westseite  4 kmSSW Marz;  450 ma. s. l.;  8. Apr. 2007; R. Schuhleg. (  CSW)–   Steiermark• 2 exx.; Bez. Hartberg-Fürstenfeld, Vorau;  28. Apr. 1958; C. Holzschuhleg. (  CHV)•  3 ♂; Gams bei Frohnleiten; Gamsgraben;  47°18'23,5"N, 15°14'49,3"E;  25. Jul. 2011; A. Eckeltleg. (  AE)•  2 exx.; Gamso F;  Apr. 1966; (  NMW)–   Kärnten• 8 exx.; Bez. Klagenfurt Land, Forchsee;  9. Mar. 1999; C. Holzschuhleg. (  CHV,  CSW)•  1 ex.; Bez. Villach Land: Gerlitzen, Deutschberg;  1300 ma. s. l.;  10. Jul. 2010; C. Holzschuhleg. (  CHV)•  3 exx.; Bez. Spittal an der Drau, Siflitzberg; Konscheggleg. (  NMW)•  2 exx.; Villach; Holdhausleg. (  NMW)•  1 ♀; Hermagor;  12. May 1964; C. Holzschuhleg. (  CHV)•  1 ♀; Bez. Spittal an der Drau, Edling;  14. Feb. 1961; C. Holzschuhleg. (  CHV)•  1 ♂; Bez. Klagenfurt Land, Kreuzbergl;  6. Mar. 1990; R. Preissleg. (  CSW)•  1 ex.; Eisenkappel;  20. Jun. 1968; (  NMW)–   Osttirol• 1 ex.; Lienz, Weg nach Bannberg;  2. Apr. 1967; A. Koflerleg. (  TLF)•  1 ♂; Lienz, Tristacher See;  26. Jul. 1961; C. Holzschuhleg. (  CHV)–   Tirol• 1 ex.; Karwendel, Absam N, Egg SW, Heuberg-Latschen;  985 ma. s. l.;  10. Apr. – 8. May 2016; M. Kahlenleg; window trap(  TLF)•  1 ex.; Karwendel, Absam N, Egg SW, Heuberg-Flecke;  1000–1050 ma. s. l.;  20. Dec. 2015; M. Kahlenleg. (  TLF)•  1 ex.; Karwendel, Absam N, Egg SW, Heuberg-Latschen;  1036 ma. s. l.;  8. May – 7. Jun. 2016; M. Kahlenleg.; window trap(  TLF)–   Oberösterreich• 1 ♀; NP Kalkalpen, Brandfläche Hagler;  47°46'24"N, 14°17'48"E;  1500 ma. s. l.;  7. Jul. 2011; A. Eckeltleg. (  AE)•  1 ♀; NP Kalkalpen, Bodinggraben, östl. Gamskitzgraben;  47°47'03,1"N, 14°22'16,5"E;  700 ma. s. l.;  7. Jul. 2011; A. Eckeltleg. (  AE).   Bosnia• 3 exx.; District Mostar, Blagaj;  12. Apr. 1920(  NMW).   Croatia• 1 ♀; ex coll. Oberthür; (  CSW).   Czech Republic• 5 ♂, 1 ♀; floodplainof Lower Morava, Dyje;  24. Apr. – 16. May 2012; S. Vodka, D. Hauck& L. Cizekleg. (  CASP)•  2 ♀; Beskiden[Beskydy mountains]; Borthleg. (  CSW,  CHV)•  1 ♂; Moravia, Brno;  22. Feb. 1997; P. Čechovskyleg. (  CSW)•  1 ♂; central Bohemia, Loučeň;  21. May 2004; L. Daněkleg. (  CSW).   France• 1 ex.; Aube, Maraye-en-Othe;  14. Apr. 2007; F. Soldatileg. (  LNEF)•  2 exx.; Loiret, Nogent-sur-Vernisson, Domaine des Barres;  20. Jun. 2022; G. Parmain& C. Moliardleg. (  GP)•  1 ♂, 1 ♀; Loiret, Nogent-sur-Vernisson, Domaine des Barres;  3. May 2023; G. Parmain& C. Moliardleg. (  GP)•  1 ♀; FD Bercé;  13. May 2014; A. Jeanneauleg. (  AJ)•  1 ♀; Bois du Château d’Angervilliers;  27. May 2020; B. Mériguetleg. (  BM)•  1 ♂, 2 ♀; FD Chantilly;  27. Apr. 2022; C. Moliardleg. (  GP)•  2 ♂, 6 ♀; FD Chantilly;  25. May 2022; C. Moliardleg. (  GP,  INRAE)•  1 ♂, 1 ♀; FD Rambouillet;  3. Feb. 2004; F. Arnaboldileg. (  FA)•  1 ♀; Rambouillet;  19. Mar. 2003; B. Mériguetleg. (  PZ)•  1 ♂; FD Rambouillet;  30. May – 30. Jun. 2006; C. Bougetleg. (  INRAE)•  1 ♂; FD Rambouillet;  25. Sep. 2006; C. Bougetleg. (  INRAE)•  1 ♀; FD Hautil;  21. Jul. 2003; F. Arnaboldileg. (  FA)•  1 ♀; Forêt de St Colombe;  23. Feb. 1999; H. Brustelleg. (  HB)•  1 ♂; Armainvilliers;  10. May 2001; C. Bougetleg. (  INRAE)•  2 ♂, 1 ♀; Armainvilliers;  11. May 2001; C. Bougetleg. (  INRAE)•  1 ♀; Armainvilliers;  8. Jun. 2001; C. Bougetleg. (  INRAE)•  3 ♂, 2 ♀; Belesta;  13. Jun. 2017; C. Bougetleg. (  INRAE)” •  3 ♀; Belvis;  13. Jun. 2017; C. Bougetleg. (  INRAE)•  1 ♂; Belvis;  13. Jun. 2017; C. Bougetleg. (  PZ)•  1 ♂; Belvis;  1. Jul. 1997;  LNEFstaffleg. (  LNEF)•  1 ♀; Espezel;  13. Jun. 2017; C. Bougetleg. (  INRAE)•  1 ♀; FD Karstenwald;  3. Jun. 2009; C. Bougetleg. (  INRAE)•  1 ♀; FD Orléans;  6. Jun. 2019;  INRAEstaffleg. (  INRAE)•  1 ♂, 1 ♀; Ferrières-en-brie;  10. May 2001; C. Bougetleg. (  INRAE)•  1 ♀; Ferrières-en-brie;  11. May 2001; C. Bougetleg. (  INRAE)•  1 ♂; Ferrières-en-brie;  8. Jun. 2001; C. Bougetleg. (  PZ)•  1 ♀; Ferrières;  10. May – 5. Jun. 2001; C. Bougetleg. (  INRAE)•  1 ♂, 1 ♀; Fougax-et-Barrineuf;  13. Jun. 2017; C. Bougetleg. (  INRAE)•  8 ♂, 4 ♀; Gambaseuil;  24. Apr. 2007; C. Bougetleg. (  INRAE)•  1 ♀; Gambaseuil;  24. Apr. 2007; C. Bougetleg. (  PZ)•  2 ♂, 1 ♀; Gex;  20. Jul. 2013; C. Bougetleg. (  INRAE)•  1 ♀; Saint-Laurent;  30. May 2016; C. Bougetleg. (  INRAE)•  1 ♀; Saint-Laurent-du-Pont;  23. Jun. 2014; P. Janssenleg. (  INRAE)•  6 ♂, 2 ♀; Vouzeron;  30. May 2016; C. Bougetleg. (  INRAE)•  1 ♀; Bussac;  21. May – 4. Jun. 2019;  LNEFstaffleg. (  LNEF)•  1 ♀; FD Verrières;  14. – 22. Apr. 2003;  LNEFstaffleg. (  LNEF)•  1 ♀; Nebias;  8. Mar. 1994;  LNEFstaffleg. (  LNEF)•  1 ♀; RNN Cerisy;  29. Apr. 2018; S. Etienneleg. (  LNEF)•  1 ♀; RNN Cerisy;  16. May 2018; S. Etienneleg. (  LNEF)•  1 ♀; Ft. pays des étangs;  2. May 2018; L. Fuchsleg. (  LuF)•  1 ♀; Marckolsheim, RB Rhinvald;  9. May 2018; L. Fuchsleg. (  LuF)•  1 ♂; FD Campagne;  4. Jun. 2019; L. Velleleg. (  LV)•  1 ♂; FD Campagne;  12. May 2021; L. Velleleg. (  LV)•  1 ♀; FD Campagne;  9. Jun. 2021; L. Velleleg. (  LV)•  1 ♀; Saint-Maurice;  15. Jun. 2010; O. Roseleg. (  OR)•  1 ♀; Bareilles;  14. Jun. 2017; C. Bougetleg. (  PZ)•  1 ♂; Le Val St Germain;  25. May 2021; B. Mériguetleg. (  BM)•  1 ♂; Larrau( Iraty);  22. Feb. 2017; C. Van Meerleg. (  CVM)•  1 ex.; Pyrénées Atlantiques, Iraty, Forêt d’Iraty;  5. Jun. 1998; H. Brustelleg. (  CSW)•  1 ♂; Ardengost;  14. Jun. 2017; C. Bougetleg. (  INRAE)•  1 ♂; Comus;  13. Jun. 2017; C. Bougetleg. (  INRAE)•  1 ♂; Hèches;  14. Jun. 2017; C. Bougetleg. (  INRAE)•  1 ♂; Niort-de-Sault;  13. Jun. 2017; C. Bougetleg. (  INRAE)•  1 ♂; FD Vierzon-Vouzeron;  7. May 2019; Canopee teamleg. (  INRAE)•  2 ♂; FD Fontainebleau;  13–15. May 2008;  LNEFstaffleg. (  LNEF)•  1 ♂; FD St. Antoine;  22. May 2021;  LNEFstaffleg. (  LNEF)•  1 ♂; Combe Lavaux;  18. May 2021;  LNEFstaffleg. (  LNEF)•  1 ♂; ZNIEFF Puits d’Enfer;  4. May 2021;  LNEFstaffleg. (  LNEF)•  1 ♂; La Broque;  25. Apr. 2011; L. Fuchsleg. (  LuF)•  1 ♂; La Wantzenau, RB confluence III-Rhin;  7. May 2018; L. Fuchsleg. (  LuF)•  1 ♂; La Wantzenau, RB confluence III-Rhin;  22. May 2018; L. Fuchsleg. (  LuF)•  1 ♂; La Wantzenau, RB confluence III-Rhin;  16. Jul. 2018; L. Fuchsleg. (  LuF)•  1 ♂; FD Vallée Doller, Oberbruck;  31. May 2017; L. Fuchsleg. (  LuF)•  1 ♂; FD Vallée Doller, Oberbruck;  26. Jul. 2017; L. Fuchsleg. (  LuF)•  1 ♂; FD Vallée Doller, Oberbruck;  1. Jun. 2018; L. Fuchsleg. (  LuF)•  1 ♂; FD Vierzon-Vouzeron;  16. May 2014; L. Velleleg. (  LV)•  1 ♂; Saint-Barthélemy-de-Séchilienne, ile Falcon;  13. Aug. 2019; Y. Braudleg. (  OC)•  1 ♂; Saint-Barthélemy-de-Séchilienne, ile Falcon;  17. Aug. 2019; Y. Braudleg. (  OC)•  1 ♂; Moussey;  24. May 2011; O. Roseleg. (  OR)•  1 ♂; Sturzelbronn;  30. Apr. 2015; P. Millarakisleg. (  PM)•  1 ♂; FD de Brotonne;  23. May 2017; S. Etienneleg. (  SE)•  1 ♂; FD de Brotonne;  6. Jun. 2017; S. Etienneleg. (  SE)•  1 ♂; FD de Brotonne;  29. May 2018; S. Etienneleg. (  SE).   Germany–  Bayern• 1 ex.; Scheidegg, NSG Rohrbachtobel;  Jun. 2017; H. Busslerleg. (  CBF)•  1 ex.; Ebrach, Brunnst.;  15. May 2017; S. Thornleg. (  ST)•  3 ♂, 3 ♀; Rauhenebrach;  16. Aug. 2016; S. Thornleg. (  ST)•  2 exx.; Rauhenebrach;  18. Aug. 2016; S. Thornleg. (  ST)•  3 exx.; Rauhenebrach;  25. Aug. 2016; S. Thornleg. (  ST).   Iran• 1 ex.; Prov. Mazandaran, Now Shahr, Kheiroud Kanar Forest;  40–200 ma. s. l.;  36°36'35"N, 51°34'10"E;  3–4. May 2010; D. Frenzelleg. (  NME).   Italy• 1 ex.; Süd-Tirol [= prov. Alto Adige], Burgraviato, Bad Grill W, Gampental;  1300 ma. s. l.;  22. Jul. 2013; M. Kahlenleg. (  TLF).   Slovakia• 1 ♀; Hronská Dúbrava;  26. Apr. 2000; P. Hlaváčleg. (  CSW)•  1 ♂; Bratislava, Badín;  21. Oct. 1987; I. Martinůleg. (  CSW)•  1 ♀; “ Hungaria: Neutraer Comitat” [= Slovakia: District Nitra]; (  CSW).   Slovenia• 18 exx.; Buje – Kozanje;  30. May 2010; M. Eggerleg. (  CEW,  CSW)•  3 exx.; “ Carniolia: Gottschee” [= Kočevje]; 1911; Naserleg. (  NMW)•  3 exx.; “ Untersteiermark: Windisch Landsberg” [= region Štajerska: Podčetrtek]; 1882; Ganglbauerleg. (  NMW).   Spain• 1 ex.; Prov. León, Ponferrada; Paganettileg. (  NMW).   Turkey• 1 ex.; N Anatolia, Yenice–Karabük;  May 1962; F. Schubertleg. (  NMW).   Figures 1.  A – E.Holotype of  Colydium noblecourti sp. nov. A.Dorsal view; B.Dorsal view of pronotum; C.Ventral view of abdomen; D.Tegmen; E.Median lobe. Scale bars: 0.5 mm ( A – C); 0.1 mm ( D, E).   Additional material.  1 ♂(  KM): “ No locality on labels, no date. Paralectotypus  Bostricilus elongatusFabriciusdes. P. Wegrzynowicz ”. This specimen was included as a paralectotypeof  Colydium elongatum(Fabricius)by Węgrzynowicz (1999). Genitalia of this specimen were recently dissected and our studies revealed that it does not belong to  C. elongatumbut rather to  C. noblecourti sp. nov.. We identified this specimen by only using high resolution photographs of it and its genitalia provided by Dr. Michael Kuhlmann (  KM) and were not able to study the specimen itself. Therefore, we refrain from listing it as a paratypeof  C. noblecourti sp. nov..   Etymology. The new species  Colydium noblecourti sp. nov.is named after Thierry Noblecourt, one of the mentors of the first author. Noblecourt worked in the French National Forest Office ( ONF) for many years. He developed a network of French entomologists, made huge contributions to the general knowledge of saproxylic beetles in Franceand raised public interest in these insects. Noblecourt is also a specialist in Symphyta (Hymenoptera) and has described several new species. The name  noblecourtiis a noun in the genitive case derived in honour of Thierry Noblecourt.   Description.   Habitus.( TL 5.1‒7.4 mm) relatively robust; head, pronotum, elytra and ventral side uniformly black (except in teneral specimens); legs and antennae reddish brown. Fig. 1 A.   Head.( HW/  PW: 0.78‒0.88) Lateral margins of frons and epistoma converging towards apex, anterior margin of epistoma straight, with yellow setation; periocular carinae as long as eye. Punctures on central part of frons elongate, distance between them about 1 to 2 diameters; punctures denser and more circular on the fronto-epistomal depression. Antennomere 1 not completely visible in dorsal aspect, 1.2 times as long as wide; antennomere 2 narrower, 1.25 times as long as wide; antennomere 3 of same width as 2 and 1.2 times as long as wide; antennomeres 4 to 7 of same width (length to width ratios: 4: 1.0; 5: 1.0; 6: 0.8; 7: 0.6); antennomere 8 slightly wider than the preceding ones and 1.75 times as wide as long; antennomeres 9 to 11 form a three-segmented club (2.5 times as wide as the funicule), antennomere 9 wider than preceding ones, twice as wide as long; antennomere 10 is 1.1 times wider than 9, twice as wide as long; antennomere 11 narrower than 10 and 1.1 times as wide as long. Setation of antennomeres 4 to 8 similar in both sexes, a few longer setae occur on the inner side of antennae; antennomeres 9, 10 and 11 densely setose.   Pronotum.(  PL/ PW: 1.27‒1.56) (Fig. 1 B) In dorsal view lateral margins slightly diverging from base to apical quarter in straight line, then slightly narrowing apicad; anterior angles narrowly rounded; lateral margin bordered from base to apex; apical margin not bordered near anterior angles. Median line sulciform from anterior margin to basal transverse groove. Admedian lines slightly impressed (never sulciform), more or less obsolete on anterior third. Punctures on disc slightly elongate and 2 to 4 diameters apart. Microsculpture punctiform, microreticulated near anterior angles. Pronotal hypomera with round, small punctures, four diameters apart. Prosternum smooth, transversely wrinkled.   Elytra.( EL/ EW: 3.00‒3.31) Parallel-sided in dorsal view; humeral angles protruding forward; elytral apices conjointly broadly rounded. Striae slightly impressed; strial punctures separated from each other by a distance of 1 to 2 diameters. Sutural interval (= interval 1) raised, but not carinate except laterally along scutellary striole, flat ‒ topped and finely wrinkled along most of its length. Uneven intervals bluntly carinate; carina on interval 3 reaching elytral apex; carina on interval 5 not reaching elytral apical rim; carina on interval 7 still shorter. Even intervals flat, smooth, indistinctly transversely wrinkled.   Ventral side of pterothorax.Mesanepisterna roughly and densely punctured. Metaventrite with complete median sulcus; very finely punctured, except for an area posterior to mesocoxae with larger punctures, partly connected by irregular lines. Metanepisterna smooth. Abdominal ventrites (Fig. 1 C) shiny, weakly microreticulate, finely punctured; punctures separated by a distance of 3 to 4 diameters, each bearing very short seta; sculpture on ventrite 1 consisting of irregular wavy or zigzag lines, forming a scaly pattern; sculpture on ventrite 2 consisting of a few irregular lines or wrinkles, particularly laterad; ventrite 5 with a deep preapical groove, apical margin obtusely angled in the middle in both sexes, setose and with two groups of long setae laterally. Relative lengths of ventrites: 1: 1.9‒2.2; 2: 1.3‒1.5; 3: 1.2‒1.4; 4: 1.0‒1.2; 5: 1.0.  Male genitalia.Tegmen (Fig. 1 D) 4 times as long as its maximum width; basal part 2.5 times longer than parameres; parameres in dorsal aspect lamelliform, narrowed apicad, in lateral aspect s-shaped, continuously narrowed to tip; not lying in same plane, but inclined toward each other at a blunt angle; median lobe (Fig. 1 E) 8 to 9 times as long as wide, 1.5 times longer than tegmen; in dorsal aspect almost parallel-sided, narrowing continuously from mid ‒ length to apex; in lateral aspect slightly bent; apex prolonged into a narrow tip.  Variabilitysome characters are subject to a certain degree of variation. Body proportions vary, as shown in the morphological measurements sections below. The admedian lines on the pronotum vary considerably: from absent in some specimens, only detectable by an elongate, narrow depression (minimal development) to an impressed, but irregularly interrupted line (maximal development). Elytral carina 5 is never completely connected to the apical elytral margin, but in a few cases it may reach it. The sculpture on the lateral parts of abdominal ventrite 2 is generally shallow. The extent of the sculptured area is variable.   Differential diagnosis.   Colydium noblecourti sp. nov.can be distinguished from the two other European species of  Colydiumas follows: From  Colydium elongatum(Fabricius)(Fig. 2 A – E)  Colydium noblecourti sp. nov.differs in the uniformly black colour of its elytra (humeral region brown or elytral base obscurely reddish in  C. elongatum); pronotum more globose apically; admedian lines weak, irregular and interrupted or absent; anterior pronotal angles not bordered by a prolongation of the lateral marginal line; carina on elytral interval 5 not reaching elytral apical rim; sculpture on the lateral parts of abdominal ventrites 2, 3 and 4 is less developed than on ventrite 1, or even absent, and never similar to ventrite 1; apical margin of abdominal ventrite 5 is obtusely angled in the middle (semicircular in  C. elongatum); aedeagus with parameres that are broader lamelliform, s-shaped in lateral aspect, inclined toward each other, not lying in the same plane (straight or slightly bent and narrow in  C. elongatum).   Figures 2.  A – E.  Colydium elongatum(Fabricius). A.Dorsal view; B.Dorsal view of pronotum; C.Ventral view of abdomen; D.Tegmen; E.Median lobe. Scale bars: 0.5 mm ( A – C); 0.1 mm ( D, E). From  Colydium filiformeFabricius(Fig. 3 A – E)  Colydium noblecourti sp. nov.differs in uniformly black colour of its elytra (elytral base distinctively reddish in  C. filiforme); pronotum in general less elongate, PL / PWup to 1.56 (  PL/ PWup to 1.65 in  C. filiforme) and more globose apically; admedian lines weak, irregular and interrupted or absent; anterior pronotal angles not bordered by a prolongation of the lateral marginal line; sculpture on the lateral parts of abdominal ventrites 2, 3 and 4 less developed than on ventrite 1, or even absent, never similar to ventrite 1; apical margin of abdominal ventrite 5 obtusely angled in the middle (semicircular in  C. filiforme); aedeagus with longer median lobe, its apex is acutely angled but never prolonged into a narrow tip.   Figures 3.  A – E.  Colydium filiformeFabricius. A.Dorsal view; B.Dorsal view of pronotum; C.Ventral view of abdomen; D.Tegmen; E.Median lobe. Scale bars: 0.5 mm ( A – C); 0.1 mm ( D, E).   Distribution. We assume a similar distribution range as for  Colydium elongatum. To date,  Colydium noblecourti sp. nov.has been recorded in the following countries: Austria, Andorra, Bosnia, Croatia, Czech Republic, France, Germany, Iran, Italy, Slovakia, Slovenia, Spainand Turkey(Fig. 6). Distribution maps of the studied material are presented for  Colydium noblecourti sp. nov.(Fig. 6),  C. elongatum(Fig. 7) and  C. filiforme(Fig. 8). Since  C. filiformeis well separated from the other European species of  Colydium, we include locality records from Węgrzynowicz (1999).   Bionomics. The specimens were found on dead or decaying wood of the following tree genera:  PiceaA. Dietrich spp.,  AbiesMiller spp.,  PinusLinné spp.(all Pinaceae),  FagusLinné spp.,  QuercusLinné spp.(both Fagaceae), and  CarpinusLinné spp.( Betulaceae).  Genetic analysis A maximum likelihood tree analysis was derived from COI barcode sequences of the three European species of the genus  Colydium. Forming distinct clades, the support values (bootstrap with 1,000 replicates) show a robust backing for the new  Colydiumspecies(Fig. 4). Considering a mean interspecific distance of 4.83 % (minimum 4.1 %, maximum 5.6 %) within the genus,  C. noblecourti sp. nov.shows a distance of 4.3 % to its closest neighbour,  Colydium filiformeFabricius, 1792, while the distance is more than 4.5 % to  Colydium elongatum(Fabricius, 1787).   Figure 4. ML tree, based on COI barcode data for  Colydiumspecimens from Austria, France, Germany and Italy. The fine, light grey branches that connect labels are not to scale. Support values (bootstrap with 1,000 replicates) are indicated on the respective branches. The sequences are publicly available in the Dataset DS-COL 0815 (  Colydiumspeciesin Europe, https://dx.doi.org/10.5883/DS-COL0815) on the BOLDhomepage ( https://www.boldsystems.org/index.php), and the respective BOLD- IDs are listed in Table 1.  Morphological measurements The total length to elytral width ratio ( TL / EW) (Fig. 5 A) does not show distinct clusters for the three species. There is mutual overlap, which does not allow a clear separation of the species by body shape alone.  Colydium filiformehas a small range, from 4.62 to 5.28 (mean = 4.91; SD = 0.15);  Colydium elongatumhas a wide range, from 3.81 to 5.19 (mean = 4.71; SD = 0.18); and  Colydium noblecourti sp. nov.a small range from 4.20 to 4.82 (mean = 4.60; SD = 0.13).   Figures 5.  A – C.Morphometric diagrams. A.Total length / elytral width ratios; B.Pronotal length / pronotal width ratios; C.PCA analysis. A similar situation can be seen for the proportions of the pronotum. The results of our measurements show no significant specific differences in the PL / PW- ratios (Fig. 5 B).  Colydium filiformehas a range, from 1.42 to 1.65 (mean = 1.53; SD = 0.05),  Colydium elongatumfrom 1.35 to 1.58 (mean = 1.47; SD = 0.04) and  Colydium noblecourti sp. nov.from 1.37 to 1.56 (mean = 1.46; SD = 0.04). The differences in the PL / PW- ratios and the TL / EW- ratios show, at most, slight specific tendencies in proportions of pronotum and body, but without diagnostic value. The PCA analysis (Fig. 5 C) reflects this situation, as there is no obvious clustering of the specific data.  Ecology of Western Palearctic species of  Colydium All previous publications on the ecology and biology of Palearctic  Colydiumshow similar behaviour for all the species ( Dajoz 1977; Węgrzynowicz 1999; Bouget et al. 2019). They live in the galleries of other saproxylic beetles. There is no clear evidence as to whether they are predators or cleaners, or possibly both depending on the stage of development (larva or adult). They are associated with different tree species.   Colydium elongatum(Fabricius)inhabits deciduous trees like  QuercusLinné spp.,  Fagus sylvaticaLinnéand  Juglans regiaLinné( Juglandaceae), at least in Central Europe, but it has also been reported from coniferous trees (  AbiesMiller spp.) in Franceand Greece.   Colydium filiformeFabriciushas hitherto been found exclusively on  QuercusLinné spp.   Colydium noblecourti sp. nov.seems to show a slight preference for coniferous trees (  PinusLinné spp.,  Abies albaMiller,  Picea abies(Linné) H. Karsten), although it has also been found on deciduous trees like  Fagus sylvaticaLinnéand  Carpinus betulusLinné.One of the authors ( R. Schuh, personal observation) has collected  C. noblecourti sp. nov.several times in the eastern part of Austria(alluvial floodplains 200–300 ma. s. l.). All these specimens were collected by hand on dead but still standing  Pinus nigraArnold, under mouldy or rotten bark. The  Colydium noblecourti sp. nov.specimens were hiding in abandoned galleries of Scolytinae ( Curculionidae) or Cerambycidae. Collecting was largely carried out from December to April, although some was performed during other parts of the year, but with less success. Some specimens from other collections bear notes about collecting circumstances on their labels, which might give more information on the species bionomics. A short list of these data follows: “ in galleries of  Xyloterus lineatus(Ol.)( Curculionidae: Scolytinae) on  Picea abies(L.) Karst. ” ( Austria: Carinthia: Hermagor, leg. C. Holzschuh); “ in galleries of  Orthotomicus laricis(F.) ( Curculionidae: Scolytinae) on  Picea abies(L.) Karst. ” ( Austria: Tyrol: Lienz, leg. A. Kofler); “ under bark of burnt  Picea” ( Austria: Tyrol, Karwendel, leg. M. Kahlen); “ under bark of  Pinusor  Picea” ( Austria: Carinthia, several localities, leg. C. Holzschuh); “ in window trap on dead  Abies albaMill.” ( Germany: Bayern, leg. H. Bussler); “ on  Fagus” ( France: Forêt d’Iraty, leg. H. Brustel); “ in the night on trunks of  Fagus” ( Austria: Vienna, leg. M. Kahlen); “ in galleries of  Xyloterus domesticus(L.) ( Curculionidae: Scolytinae) on  Carpinus betulusL. ” ( Austria: Vienna, leg. C. Holzschuh). These labels represent only single data points, however, and a full ecological analysis is therefore not yet possible. Further investigations are required to reveal the true bionomics of  C. noblecourti sp. nov. 4974395343 2016-04-28 TLF Eckelt A. AUT Parmain & Eckelt & Schuh 320 16.21968 Johannserkogel N 1 48.19335 Lainzer Tiergarten 1 1 W holotype 4974395388 1998-01-16 HB H. Brustel Andorra La Massana 1 1 paratype 4974395350 2008-02-25 HB H. Brustel Andorra La Massana 3 3 paratype 4974395409 1965-07-24 CSW Vogl Austria Lainzer Tiergarten 1 1 Wien paratype 4974395321 1996-05-08 CSW E. Holzer Austria Lainzer Tiergarten 1 1 paratype 4974395361 1966-07-02 CSW C. Holzschuh Austria Lainzer Tiergarten 1 1 paratype 4974395356 1995-04-19 TLF M. Kahlen Austria Lainzer Tiergarten 300 Nordseite Johannser Kogel 1 1 paratype 4974395342 1954-08 NMW F. Schubert Austria Lainzer Tiergarten 1 paratype 4974395328 1951-07-29 CHV C. Holzschuh Austria Lainzer Tiergarten 1 paratype 4974395318 1969-09-06 CHV C. Holzschuh Austria Lainzer Tiergarten 1 paratype 4974395331 2007-05-14 CSW W. Hansely Austria Lainzer Tiergarten 1 Niederoesterreich paratype 4974395330 CHV Kubinyi Austria Wienerwald 2 Niederosterreich paratype 4974395429 1966-05-22 CHV C. Holzschuh Austria Mariabrunn Umgebung 1 Wien Umgebung paratype 4974395377 NMW Kaufmann Austria Lunz 2 paratype 4974395373 NMW Haberditz Austria Umgebung 1 Wien paratype 4974395400 NMW Hoffmann Austria Umgebung 1 Wien paratype 4974395411 1947-04-07 NMW Lechner Austria Donau-Auen Klosterneuburg 1 paratype 4974395334 1947-04-08 NMW Lechner Austria Wienerwald Klosterneuburg 1 paratype 4974395329 1948-03-21 NMW Lechner Austria Pressbaum 2 paratype 4974395390 1990-04-15 CSW R. Schuh Austria Bez. Wiener Neustadt 400 Kurassier Bad Fischau 2 1 1 paratype 4974395325 2007-01-07 CSW R. Schuh Austria Feuerwerksanstalt Wiener Neustadt 2 1 1 paratype 4974395370 2005-05-23 CSW W. Hansely Austria Bez. Neunkirchen 800 Hinternasswald Raxgebiet 1 1 paratype 4974395365 1993-04-10 CSW R. Schuh Austria Fohrenwald Wiener Neustadt 1 1 paratype 4974395428 2024-05-11 CSW R. Schuh Austria Bez. Baden 300 Nordseite Helenental 1 1 paratype 4974395351 1980-04-02 CSW A. Dostal Austria Neulengbach 1 1 Burgenland paratype 4974395308 2007-04-08 CSW R. Schuh Austria 450 Gruskogel Westseite Bez. Mattersburg 12 6 6 Burgenland paratype 4974395419 1958-04-28 CHV C. Holzschuh Austria Vorau Bez. Hartberg-Furstenfeld 2 Steiermark paratype 4974395381 2011-07-25 AE A. Eckelt Austria Gams 47.306526 Gamsgraben 1 15.247028 Gams bei Frohnleiten 3 3 paratype 4974395357 1966-04 NMW Austria Gams 2 Karnten paratype 4974395333 1999-03-09 CHV, CSW C. Holzschuh Austria Forchsee Bez. Klagenfurt Land 8 Karnten paratype 4974395437 2010-07-10 CHV C. Holzschuh Austria Bez. Villach Land 1300 Deutschberg Gerlitzen 1 paratype 4974395340 NMW Konschegg Austria Siflitzberg Bez. Spittal an der Drau 3 paratype 4974395359 NMW Holdhaus Austria Villach 2 paratype 4974395355 1964-05-12 CHV C. Holzschuh Austria Hermagor 1 1 paratype 4974395399 1961-02-14 CHV C. Holzschuh Austria Edling Bez. Spittal an der Drau 1 1 paratype 4974395403 1990-03-06 CSW R. Preiss Austria Kreuzbergl Bez. Klagenfurt Land 1 1 paratype 4974395367 1968-06-20 NMW Osttirol Austria Eisenkappel 1 paratype 4974395393 1967-04-02 TLF A. Kofler Austria Lienz Weg nach Bannberg Weg 1 Osttirol paratype 4974395416 1961-07-26 CHV C. Holzschuh Austria Tristacher See Lienz 1 1 Tirol paratype 4974395302 2016-04-10 2016-05-08 2016-04-10 window trap TLF M. Kahlen Austria Karwendel 985 Absam N, Egg SW, Heuberg-Latschen Egg 1 Tirol paratype 4974395374 2015-12-20 TLF M. Kahlen Austria Karwendel 1025 Absam N, Egg SW, Heuberg-Flecke Egg 1 paratype 4974395385 2016-05-08 2016-06-07 2016-05-08 window trap TLF M. Kahlen Austria Karwendel 1036 Absam N, Egg SW, Heuberg-Latschen Egg 1 Oberoesterreich paratype 4974395348 2011-07-07 AE A. Eckelt Austria 1500 47.773335 Brandflache Hagler 18 14.296667 NP Kalkalpen 1 1 Oberosterreich paratype 4974395305 2011-07-07 AE A. Eckelt Austria 700 47.784195 Gamskitzgraben 1 14.37125 NP Kalkalpen 1 1 paratype 4974395339 1920-04-12 NMW Bosnia and Herzegovina Blagaj District Mostar 3 paratype 4974395396 CSW Oberthur Croatia Croatia 1 1 paratype 4974395369 floodplain 2012-04-24 2012-05-16 2012-04-24 CASP S. Vodka & D. Hauck & L. Cizek Czech Republic Dyje Lower 6 1 5 Lower Morava paratype 4974395397 CSW, CHV Borth Czech Republic Beskiden 2 2 paratype 4974395371 1997-02-22 CSW P. Cechovsky Czech Republic Brno 1 1 Moravia paratype 4974395424 2004-05-21 CSW L. Danek Czech Republic Loucen 1 1 central Bohemia paratype 4974395438 2007-04-14 LNEF F. Soldati France Maraye-en-Othe Aube 1 paratype 4974395324 2022-06-20 GP G. Parmain & C. Moliard France Loiret Domaine des Barres Nogent-sur-Vernisson 2 paratype 4974395352 2023-05-03 GP G. Parmain & C. Moliard France Loiret Domaine des Barres Nogent-sur-Vernisson 2 1 1 paratype 4974395378 2014-05-13 AJ A. Jeanneau France FD Berce 1 1 paratype 4974395354 2020-05-27 BM B. Meriguet France Bois du Chateau d'Angervilliers 1 1 paratype 4974395315 2022-04-27 GP C. Moliard France FD Chantilly 3 2 1 paratype 4974395391 2022-05-25 GP, INRAE C. Moliard France FD Chantilly 8 6 2 paratype 4974395410 2004-02-03 FA F. Arnaboldi France FD Rambouillet 2 1 1 paratype 4974395405 2003-03-19 PZ B. Meriguet France Rambouillet 1 1 paratype 4974395344 2006-05-30 2006-06-30 2006-05-30 INRAE C. Bouget France FD Rambouillet 1 1 paratype 4974395420 2006-09-25 INRAE C. Bouget France FD Rambouillet 1 1 paratype 4974395423 2003-07-21 FA F. Arnaboldi France FD Hautil 1 1 paratype 4974395372 1999-02-23 HB H. Brustel France Foret de St Colombe 1 1 paratype 4974395313 2001-05-10 INRAE C. Bouget France Armainvilliers 1 1 paratype 4974395432 2001-05-11 INRAE C. Bouget France Armainvilliers 3 1 2 paratype 4974395386 2001-06-08 INRAE C. Bouget France Armainvilliers 1 1 paratype 4974395349 2017-06-13 INRAE C. Bouget France Belesta 5 2 3 paratype 4974395418 2017-06-13 INRAE C. Bouget France Belvis 3 3 paratype 4974395414 2017-06-13 PZ C. Bouget France Belvis 1 1 paratype 4974395425 1997-07-01 LNEF LNEF staff France Belvis 1 1 paratype 4974395383 2017-06-13 INRAE C. Bouget France Espezel 1 1 paratype 4974395310 2009-06-03 INRAE C. Bouget France FD Karstenwald 1 1 paratype 4974395407 2019-06-06 INRAE INRAE staff France FD Orleans 1 1 paratype 4974395366 2001-05-10 INRAE C. Bouget France Ferrieres-en-brie 2 1 1 paratype 4974395389 2001-05-11 INRAE C. Bouget France Ferrieres-en-brie 1 1 paratype 4974395337 2001-06-08 PZ C. Bouget France Ferrieres-en-brie 1 1 paratype 4974395376 2001-05-10 2001-06-05 2001-05-10 INRAE C. Bouget France Ferrieres 1 1 paratype 4974395412 2017-06-13 INRAE C. Bouget France Fougax-et-Barrineuf 2 1 1 paratype 4974395387 2007-04-24 INRAE C. Bouget France Gambaseuil 12 4 8 paratype 4974395316 2007-04-24 PZ C. Bouget France Gambaseuil 1 1 paratype 4974395314 2013-07-20 INRAE C. Bouget France Gex 3 1 2 paratype 4974395320 2016-05-30 INRAE C. Bouget France Saint-Laurent 1 1 paratype 4974395430 2014-06-23 INRAE P. Janssen France Saint-Laurent-du-Pont 1 1 paratype 4974395353 2016-05-30 INRAE C. Bouget France Vouzeron 8 2 6 paratype 4974395307 2019-05-21 2019-06-04 2019-05-21 LNEF LNEF staff France Bussac 1 1 paratype 4974395415 2003-04-14 2003-04-22 2003-04-14 LNEF LNEF staff France FD Verrieres 1 1 paratype 4974395332 1994-03-08 LNEF LNEF staff France Nebias 1 1 paratype 4974395379 2018-04-29 LNEF S. Etienne France RNN Cerisy 1 1 paratype 4974395402 2018-05-16 LNEF S. Etienne France RNN Cerisy 1 1 paratype 4974395384 2018-05-02 LuF L. Fuchs France Ft. pays des etangs 1 1 paratype 4974395360 2018-05-09 LuF RB Rhinvald & L. Fuchs France Marckolsheim 1 1 paratype 4974395336 2019-06-04 LV L. Velle France FD Campagne 1 1 paratype 4974395426 2021-05-12 LV L. Velle France FD Campagne 1 1 paratype 4974395398 2021-06-09 LV L. Velle France FD Campagne 1 1 paratype 4974395326 2010-06-15 OR O. Rose France Saint-Maurice 1 1 paratype 4974395408 2017-06-14 PZ C. Bouget France Bareilles 1 1 paratype 4974395394 2021-05-25 BM B. Meriguet France Le Val St Germain 1 1 paratype 4974395413 2017-02-22 CVM C. Van Meer Iraty Larrau Larrau 1 1 paratype 4974395406 1998-06-05 CSW H. Brustel France Pyrenees Atlantiques Foret d'Iraty Iraty 1 paratype 4974395338 2017-06-14 INRAE C. Bouget France Ardengost 1 1 paratype 4974395319 2017-06-13 INRAE C. Bouget France Comus 1 1 paratype 4974395322 2017-06-14 INRAE C. Bouget France Heches 1 1 paratype 4974395309 2017-06-13 INRAE C. Bouget France Niort-de-Sault 1 1 paratype 4974395345 2019-05-07 INRAE Canopee team France FD Vierzon-Vouzeron 1 1 paratype 4974395347 2008-05-13 2008-05-15 2008-05-13 LNEF LNEF staff France FD Fontainebleau 2 2 paratype 4974395317 2021-05-22 LNEF LNEF staff France FD St. Antoine 1 1 paratype 4974395312 2021-05-18 LNEF LNEF staff France Combe Lavaux 1 1 paratype 4974395382 2021-05-04 LNEF LNEF staff France ZNIEFF Puits d'Enfer 1 1 paratype 4974395395 2011-04-25 LuF L. Fuchs France La Broque 1 1 paratype 4974395433 2018-05-07 LuF L. Fuchs France RB confluence III-Rhin La Wantzenau 1 1 paratype 4974395421 2018-05-22 LuF L. Fuchs France RB confluence III-Rhin La Wantzenau 1 1 paratype 4974395427 2018-07-16 LuF L. Fuchs France RB confluence III-Rhin La Wantzenau 1 1 paratype 4974395401 2017-05-31 LuF L. Fuchs France Oberbruck FD Vallee Doller 1 1 paratype 4974395368 2017-07-26 LuF L. Fuchs France Oberbruck FD Vallee Doller 1 1 paratype 4974395422 2018-06-01 LuF L. Fuchs France Oberbruck FD Vallee Doller 1 1 paratype 4974395335 2014-05-16 LV L. Velle France FD Vierzon-Vouzeron 1 1 paratype 4974395327 2019-08-13 OC Y. Braud France ile Falcon Saint-Barthelemy-de-Sechilienne 1 1 paratype 4974395392 2019-08-17 OC Y. Braud France ile Falcon Saint-Barthelemy-de-Sechilienne 1 1 paratype 4974395323 2011-05-24 OR O. Rose France Moussey 1 1 paratype 4974395311 2015-04-30 PM P. Millarakis France Sturzelbronn 1 1 paratype 4974395375 2017-05-23 SE S. Etienne France FD de Brotonne 1 1 paratype 4974395363 2017-06-06 SE S. Etienne France FD de Brotonne 1 1 paratype 4974395341 2018-05-29 SE S. Etienne France FD de Brotonne 1 1 paratype 4974395404 2017-06 CBF H. Bussler Germany NSG Rohrbachtobel Scheidegg 1 Bayern paratype 4974395417 2017-05-15 ST S. Thorn Germany Brunnst. Ebrach 1 paratype 4974395435 2016-08-16 ST S. Thorn Germany Rauhenebrach 6 3 3 paratype 4974395380 2016-08-18 ST S. Thorn Germany Rauhenebrach 2 paratype 4974395303 2016-08-25 ST S. Thorn Germany Rauhenebrach 3 paratype 4974395358 2010-05-03 2010-05-04 2010-05-03 NME D. Frenzel Iran Prov. 120 36.609722 Kheiroud Kanar Forest 19 51.569443 Now Shahr 1 Prov. Mazandaran paratype 4974395301 2013-07-22 TLF M. Kahlen Italy Burgraviato 1300 Gampental Bad Grill W 1 Alto Adige paratype 4974395362 2000-04-26 CSW P. Hlavac Slovakia Hronska Dubrava 1 1 paratype 4974395306 1987-10-21 CSW I. Martinu Slovakia Badin Bratislava 1 1 paratype 4974395431 CSW Slovakia & District Nitra Slovakia Neutraer Comitat Hungaria 1 1 paratype 4974395346 2010-05-30 CEW, CSW M. Egger Slovenia Buje - Kozanje 18 paratype 4974395436 NMW Naser Slovenia Gottschee Carniolia 3 Kocevje paratype 4974395364 NMW Ganglbauer Slovenia region Stajerska Untersteiermark: Windisch Landsberg 3 Podcetrtek paratype 4974395304 NMW Paganetti Spain Ponferrada Prov. Leon 1 paratype 4974395434 1962-05 NMW F. Schubert Turkey Yenice-Karabuk N Anatolia 1 Karabuk paratype