Thinobius angusticeps FAuvel, 1889

Makranczy, György, 2014, Synonymies In The Holarctic Thinobius Major And Linearis Species Groups (Coleoptera: Staphylinidae: Oxytelinae), Acta Zoologica Academiae Scientiarum Hungaricae 60 (1), pp. 13-38 : 20-23

Thinobius angusticeps FAuvel, 1889

( Figs 2 , 7 , 14, 23–24 , 27 , 42, 46–47)

Thinobius angusticeps FAuvel, 1889: 83 , 84.

Thinobius (Thinophilus) allocerus Eppelsheim, 1893: 64 ., syn. n.

Thinobiussilvaticus BeRNhAueR, 1899: 436. (newsynonyminSChülKe & MAKRANCZY 2011) Trogophloeus alaskanus FAll, 1926: 146 ., syn. n.

Thinobiuspeezi SCheeRpeltZ, 1957: 483. (newsynonyminSChülKe & MAKRANCZY 2011)

Examinedtypematerial – Thinobiusangusticeps Fauvel – Neotype (f), bypresentdesignation: “Torrent [= mountainstream] deRabuons; HauteTinéeVII-48; [leg.] Fr.[anklin] Pierre \ angusticeps; J.J. [= JeanJarrige] det. IL [= inlitteris] \ Neotypus; Thinobius ; angusticepsFauvel; des. Makranczy, 2010 \ Thinobius ; angusticepsFauvel; det. Makranczy, 2010” (MNHP); Thinobius (Thinophilus) allocerus Eppelsheim – Lectotype (m), bypresentdesigna- tion: “m \ Ost-Sibirien; Quellgebiet; desIrkut.; Leder 1891. \ heterocerus; Epp. \ allocer- us; Epp. Deutsch. ent.; Zeit. 1893. p. 64. \ c. Epplsh.; Steind. d. \ Gezeichnet!; 7.IV.1942; O. Scheerpeltz \ Typus \ Lectotypus; Thinobius ; allocerusEppelsheim; des. Makranczy, 2013 \ Thinobius ; angusticepsFauvel; det. Makranczy, 2013” (NHMW), Paralectotype (1): “m \ Ost-Sibirien.; Quellgebiet; desIrkut.; Leder 1891. \ heterocerus; Epp. \ c. Epplsh.; Steind. d. \ Co-; typus \ Paralectotypus; Thinobius ; allocerusEppelsheim; des. Makranczy, 2013 \ Thinobius ; angusticepsFauvel; det. Makranczy, 2013” (NHMW); Thinobiussilvaticus Bern- hauer – Lectotype (m), bypresentdesignation: “Bachergebg.; Bernhauer \ silvaticusBrh; Waldbach; Reifnig \ Type \ Gezeichnet!; 8.IV.1942; O. Scheerpeltz \ silvaticusBernh.; det. O. Scheerpeltz, 1942 \ ChicagoNHMus; M. Bernhauer; Collection \ Lectotypus; Thinobius ; silvaticusBernhauer; des. Makranczy, 2010 \ Thinobius ; angusticepsFauvel; det. Makranczy, 2010” (FMNH), Paralectotype (1): “Bachergebg.; Bernhauer \ silvaticusBrnh.; Waldbachbei; Reifnig \ Type \ Type [bluecard] \ Gezeichnet!; 2.IV.1942; O. Scheerpeltz \ Typus; Thinobius ; silvaticus; Bernhauer [darkredcard] \ f \ Paralectotypus; Thinobius ; silvaticusBern- hauer; des. Makranczy, 2010 \ Thinobius ; angusticepsFauvel; det. Makranczy, 2010” (1f, NHMW); Trogophloeusalaskanus FAll – Holotype (m): “McKin.[ley] P[ar]k [Station]; Alaska; 7[=VII.]-9-[19]24. \ Type; alaskanus \ M.C.Z.; Type; 24054 \ H.C. Fall; Collection \ Holoty- pus; Trogophloeus ; alaskanusFall; ver. Makranczy, 2000 \ Thinobius ; angusticepsFauvel; det. Makranczy, 2013” (MCZN); Thinobiuspeezi Scheerpeltz – Lectotype (m), bypresentdesig- nation: “m \ Altprags, Östl.; Dolomiten. S. Tirol.; Ital.; EndeVII.49. Peez \ excoll.; Scheerpeltz \ Typus; Thinobius ; (Platyderothinophilus); Peezi; O. Scheerpeltz \ Lectotypus; Thinobius ; peeziScheerpeltz; des. Makranczy, 2000 \ Thinobius ; angusticepsFauvel; det. Makranczy, 2010” (NHMW), Paralectotypes (3): samedataaslectotype (1 m, 2 f, NHMW).

Othermaterial – CANADA: BanffSp [rings], Alberta, VI . [19]11 (1, coll. Hubbard & Schwarz, USNM); YukonTerritory, DempsterHwy., mi55,3300’ 13.VII.1968, leg. J. M. Campbell & A. Smetana (1, CNCI); Yukon Territory, Dempster Hwy., mi32, 2700’ 15.VII.1968, leg. J. M. Campbell & A. Smetana (2 m, CNCI); Yukon Territory, Dempster Hwy., mi35, 2900’ 15.VII.1968, leg. J. M. Campbell & A. Smetana (5 m, 6 f, CNCI); ROMANIA: jud. Hunedoara, P.N. Retezat, 2 kmWLuncaRotunda, LăpuşnicuMare , 45°19.0’N, 22°45.5’E, 1100 m, 29–30. V .2002, leg. Gy. Makranczy, fromstreambanksandandfinegravel, flotation (1 m, 1 f, HNHM); jud. Argeş, P.N. PiatraCraiului (Gr. DâmboviţaGorges), 0.3 kmESERucăr, endof Cheile Dâmboviţei, 45°23’08”N, 25°10’56”E, 740 m, 17.VII.2011, Gy. Makranczy (465), tip of gravelislandinstream, sandygravel, flotation (1, HNHM); RUSSIA: N-Cisbaikalia, Buryatia, BaikalMts. , leftsideofKurkulariv., [Vodopadnyistream,] 55°05’52.0’’N, 108°47’06.5’’E, 981 m, 7–8.VII.2013, leg. I. V . Enushchenko (1 f, 1, coll. Shavrin, 1 m, 1, HNHM) .

Redescription – Measurements (in mm, n = 10): HW = 0.30 (0.27–0.315); TW = 0.30 (0.27–0.32); PW = 0.32 (0.30–0.35); SW = 0.36 (0.32–0.39); AW = 0.41 (0.36–0.45); HL = 0.28 (0.25–0.29); EL = 0.09 (0.08–0.09); TL = 0.10 (0.09–0.10); PL = 0.25 (0.23–0.28); SL = 0.46 (0.41– 0.50); SC = 0.41 (0.37–0.44); FB = 1.02 (0.88–1.09); BL = 1.98 (1.65–2.29). Body ( Fig. 2 ) more orlessunicoloured. Head, pronotumandabdomenblackishdarkbrown, elytrafrequently lighter, darkbrownorreddishwithadarker, blackishspotbehindscutellumextendingto shoulders. Legs, mouthpartsandantennaedarkbrown, onlytarsiandtibiae (especially bothends) somewhatlighter. Allmainbodypartswithveryfinecoriaceousmicrosculptureintermixedwithfineandratherdensepunctation, makingbodymoderatelylustrous. Punctationonhead (especiallymiddleofvertex) stronger, moderatelydeep, pronotum slightlylessstrongandmoredense, elytraevenfineranddenser, onabdomenmorein- distinct; ontergiteVIIbothcoriaceousmicrosculptureandpunctationfadingposteriorly (asalsoonmostlyunexposedtergiteVIII), makingtipofabdomenmuchshinierthanrest. Pubescenceonforebodyratherdepressed, short, fineanddense (onelytrathemostdense), onabdomensomewhatlessdensebutnotlongerhairs, apicesoftergiteswitharowofcon- spicuouslylonghairs, abdominalsidesandapexwithafewdarkerandstrongerbristles. Strongdarkbristleonoutersideofsupraantennaltubercleatanteriorborderofeyeand onposterioredgeofvertexadjacenttotemples, similaronesrightbehindanteriorpronotal cornerandonsideat 3/5 length. Setationonheadmediallydirectedexceptmidlineand posteriorpartofvertexwheremoreanterior. Pronotalsetationmostlyantero-mediallydi- rected, butonposteriorpronotaledgeandveryposteriormiddleofdiscdirectionmorean- terior. Elytraandabdomenwithposteriorlydirectedhairs. Antennae, legsandmouthparts withveryshort, notconspicuoussetation, exceptforthestiff, darkerhairslightlydistal frommiddleofeachtibiaandonesnearapicesoffemora. Sidesofelytrawiththreesuch stiff setae distributed on side, the middle one shifted towards apex from middle.

Headslightlywiderthanlong, templesusuallystraight, sometimeswithagentlecurve ontheside, roundedonposteriorpart. Middleofvertexsomewhatimpressed. Anteriorbor- derofnecknotmarkedwithgroove, onlybychangeofmicrosculpture. Frontoclypealsuture appearingasfine, oftenshiniergrooveanddarkline (visibleonlyifheadlighter) connecting supraantennaltubercles, similarlydarkerspotssituatedatbothsidesonmiddleofvertex. Supraantennaltuberclesmoderatelydeveloped, weaklyseparatedfromvertex. Antennae somewhatelongate ( Fig. 14 ), 6thantennomereappearingaswideasadjacentones.

Pronotumweaklytransverse, 1.30× widerthanlong, justatinybitwiderthanhead, pronotumwithonlytracesofimpressionsatsidesofunmarkedmidlineandposterior margin. Anteriorcornersratherweaklyrounded, posteriorcornersverybroadly, sides gentlyarched. Pronotalmarginalbeadvisibleonposteriormargin, anteriormarginonly gentlyarched (almoststraight) withtracesofamarginalbeadinmiddle. Scutellumlarge, setoseanddull. Elytralong, oneelytronmorethantwiceaslongasbroad, gentlycurved incross-sectionandparallel-sided (verygentlydilatingposteriorly). Shouldersmoderately developed. Alongsutureonlywithtracesofmarginalbead, mostlyatbroadlyroundedsuturalcorners. Legsofmediumlength, tarsallobesthinbutrelativelylong, tibiaefusiform, appearmuchwiderinmiddlethanatends.

Abdomenveryweaklyfusiform, sidesmoreorlessstraightandparallel; widestin themiddle, withjustaboutthesamewidthaselytraatbroadestpoint. Posteriormarginof tergiteVIIwithlightcolouredanddistinctpalisadefringe.

Primaryandsecondarysexualfeatures – Sexesnotappearingdifferentinregulardor- salview, butfromventralaspectthestrongmedio-apicalincisionofsterniteVIIIandthe longitudinalimpressionalongthewholelengthofsterniteVIIandinamuchlesserextent onapexofsterniteVI ( Fig. 7 ) makingthemalerathereasytorecognizeandseparatefrom 22, 0.08 mm for Figs 19, 25 , 0.09 mm for Figs 20–21, 24 , 0.10 mm for Figs 18, 23.

closelyrelatedspecies, e.g. theventralabdominalapexof T. procerus Eppelsheim ( Fig. 9 ). PosteriorcornersoftergiteVIII (similarinbothsexes) gentlypulledout, posterioredgeoth- erwisestraight. MalesterniteVIIIasinFig. 27 , tergiteIXasinFig. 23 , sterniteIXasinFig. 24 . AedeagusasinFig. 42. FemalegenitalappendageasinFig. 46, spermathecaasinFig. 47.

Distribution – ThedistributionofthisspeciesisprobablyoftheSiberiantype (sensu DeLattin) withboreomontanedisjunctarealinEurope. Asopposedtothepreviousspecies itisalsoknownfromtheNearcticregion (missinginthesouthernareas). InCentralEurope itusuallyoccurswherepeaksapproachanelevationof 2000 m, butonthenorthcouldalso bepresentonmoreflatlandscapes.

Remarks – Theoriginaltypelocalityof Thinobiusangusticeps isChamo- nix, FranceandthenamewaspublishedforFowleR’s (1888) suspectedmisuseof T. major Kraatz. ( T. major wasnotknownfromBritainatthattime.) ThedescriptionindicatesmaterialseenfromCharlesBrisoutdeBarneville’s collecting. NospecimensweretracedinFAuvel’ scollection (inISNB) under thisnameandnoteveninBrisout’scollection (inMNHP) (M. Tronquet, pers. comm., Sep. 2009) either. ThearticleclearlystatesthatFauvelhasnotseenma- terialfromBritain. Itwasthereforefeltnecessarytodesignateaspecimenfrom Franceasneotypeof Thinobiusangusticeps. Theonlysuchspecimenavailable wasinJeanJarrige’scollection (inMNHP, Figs 46–47), bearinganidentifica- tionlabel “ angusticeps ” byJeanJarrigehimself (MarcTronquet, pers. comm., Jan. 2010). TheTorrentdeRabuonsrunsfromtheLacdeRabuons, 2494 m, 44°16’10’’N, 6°58’48’’E to the Tinée river, 1120 m, 44°14’37’’N, 6°56’22’’E, France, département 06 (Alpes-Maritimes); thenearesttownisSaint-Étiennede-Tinée. For Thinobiussilvaticus Bernhauer, only 2 genuinetypespecimens werelocated. Oneisapreviouslydissectedmalewithratherdistortedaedea- gus. Theotherisafemalewithdetachedabdominaltip, butotherwiseintact. Theformerspecimenischosenaslectotype.

Figures

Figs 1–6. Forebodies of Thinobius species: 1 = T. major Kraatz, 1857, 2 = T. angusticeps Fauvel, 1889, 3 = T. procerus Eppelsheim, 1893, 4 = T. bicolor Joy, 1911, 5 = T. petzi Bernhauer, 1908, 6 = T. micros Fauvel, 1871. Scales: 0.07 mm for Fig. 6, 0.10 mm for Figs 2, 4–5, 0.14 mm for Figs 1, 3.

Figs 7–12. 7 = Thinobius angusticeps Fauvel, 1889, abdominal apex, ventral view. 8–10 = T. procerus Eppelsheim, 1893, 8 = abdomen, dorsal view, 9 = abdominal apex, ventral view, 10 = right hind leg. 11–12 = T. paramicros sp. n.: 11 = head, 12 = forebody and abdomen. Scales:

Figs 13–26. Antennae of Thinobius species: 13 = T. major Kraatz, 1857, 14 = T. angusticeps Fauvel, 1889, 15 = T. procerus Eppelsheim, 1893, 16 = T. bicolor Joy, 1911, 17 = T. petzi Bernhauer, 1908, 18 = T. micros Fauvel, 1871, 19 = T. paramicros sp. n. 20–22 = T. major Kraatz, 1857, male, 20 = sternite VIII, 21 = tergite IX, 22 = sternite IX. 23–24 = T. angusticeps Fauvel, 1889, male, 23 = tergite IX, 24 = sternite IX. 25–26 = T. procerus Eppelsheim, 1893, male, 25 = tergite IX, 26 = sternite IX. Scales: 0.05 mm for Figs 13, 15, 0.06 mm for Figs 14, 16–17, 26, 0.07 mm for Fig.

Figs 27–33. 27 = T. angusticeps Fauvel, 1889, male sternite VIII. 28 = T. procerus Eppelsheim, 1893, male sternite VIII. 29–31 = T. bicolor Joy, 1911, male, 29 = sternite VIII, 30 = tergite IX, 31 = sternite IX. 32–33 = T. petzi Bernhauer, 1908, male, 32 = tergite IX, 33 = sternite IX. Scales: 0.10 mm for Fig. 33, 0.11 mm for Fig. 32, 0.12 mm for Figs 30–31, 0.135 mm for Fig. 27, 0.15