Thinobius procerus Eppelsheim, 1859

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 : 23-26

Thinobius procerus Eppelsheim, 1859

( Figs 3 , 8–10 , 15, 25–26 , 28 , 43)

Thinobius (Thinophilus) procerus Eppelsheim, 1893: 63 .

Trogophloeus teres FAll, 1926: 146 ., syn. n.

Examinedtypematerial – Thinobius (Thinophilus) procerus Eppelsheim – Holotype (m): “m \ Ost-Sibirien.; Quellgebiet; desIrkut.; Leder 1891. \ procerus; Epp. \ procerus; Epp. Deutsch. ent.; Zeit. 1893. p. 63. \ c. Epplsh.; Steind. d. \ Typus \ Holotypus; Thinobius ; procerusEppelsheim; ver. Makranczy, 2013 \ Thinobius ; procerusEppelsheim; det. Makranczy, 2013” ( NHMW); Trogophloeusteres FAll – Holotype (f): “McKin.[ley] P[ar]k [Station]; Alaska; 7[=VII.]-9-[19]24. \ Type; teres \ M.C.Z.; Type; 24055 \ H.C. Fall; Collection \ Holotypus; Trogophloeus ; teresFall; ver. Makranczy, 2000 \ Thinobius ; procerus Eppelsheim ; det. Makranczy, 2013” ( MCZN) .

Othermaterial – RUSSIA: “m \ Baikal; Bang- Haas \ procerusEpp., vgl. m. Type; determ. Bernh \ Gezeichnet!; 7.IV.1942; O. Scheerpeltz \ procerusEppelsh.; det. O. Scheerpeltz, 1942 \ Dr. M. Bernhauer; 10.XI. donavit 1942 \ excoll.; Scheerpeltz” (2 m, NHMW); N-Cisbaikalia, Buryatia, BaikalMts, Kurkulariv., [Peshekhodnyistream,] 55°05’52.0[46.1]’’N, 108°55’33.9’’E, 725 m, 1–2.VII.2013, leg. I. V . Enushchenko (1 m, coll. Shavrin, 1 f, MHNG); N-Cisbaikalia, Bur- yatia, BaikalMts. , leftsideofKurkulariv., [Vodopadnyistream,] 55°05’52.0’’N, 108°47’06.5’’E, 981 m, 7–8.VII.2013, leg. I. V . Enushchenko (3 m, 1 f, HNHM, 1 f, NHMW); E-Siberia, Khamar- DabanMts, KomarinskiyMts. , middleflowofSlyudyankaRiv., 51.587736°N, 103.630056°E, 14–15.VII.2013, leg. A. V . Shavrin & I. V . Enushchenko (5 m, 2 f, coll. Shavrin, 1 m, MHNG, 4 fHNHM); Transbaikalia, ChitaArea, KyrinskiyDistrict , Bal’dzhaRiv., 49°17’54.4”N, 110°09’20.8”E, 1432 m, 5.VIII.2013, leg. I. V . Enushchenko (2 f, coll. Shavrin, 1 m, HNHM); Siberiaor., Chabarowskijkr., BadshalskijGeb. , Mündg. desOmot-Makit [approx. 50°34’23”N, 134°19’42”E], 850 m, 12.VII.1997, leg. J. Sundukow (S31) (1 m 3 f, coll. Schülke); Primorie, SchutzgebietLazowkijKl. S-j. Log [approx. 43°12’N, 133°47’E], 5. VI .1997, leg. J. Sundukow (S32) (1 f, coll. Schülke); USA / ALASKA: KenaiMts., TernLakeCampground, 700’, 12. VI .1978, leg. A. Smetana & E. C. Becker (1 m, CNCI, 1 m, HNHM); 12mi N mi78 Denali Hwy, Windy Creek, 13.VII.1978, leg. A. Smetana (1 m, CNCI); mi220 George Parks Hwy , 14.VII.1978, leg. A. Sme- tana (2 m, CNCI); Prudhoe Bay Rd. , 9mi N Atigun Pass, 68°14’N, 149°25’W, 3100’, 6.VII.1978, leg. J. M. Campbell & A. Smetana (1 m, 1 f, CNCI) .

Redescription – Measurements (in mm, n = 10): HW = 0.35 (0.33–0.37); TW = 0.35 (0.32–0.37); PW = 0.40 (0.38–0.42); SW = 0.47 (0.43–0.50); AW = 0.51 (0.48–0.55); HL = 0.31 (0.29–0.33); EL = 0.10 (0.10–0.105); TL = 0.10 (0.095 –0.105); PL = 0.31 (0.30–0.33); SL = 0.61 (0.57–0.65); SC = 0.54 (0.51–0.57); FB = 1.26 (1.21–1.30); BL = 2.43 (2.12–2.77). Body ( Fig. 3 ) slightlytobarelybicoloured. Head, pronotumandabdomendarkbrown, occasionally withslightreddishtint, elytrareddishmediumbrownwithadarker, blackishareabehindscutellumextendingtoshoulders. Legs, mouthpartsandantennaeslightlyreddish mediumtodarkbrown, onlytibiaeandtarsisomewhatlighter. Allmainbodypartswith veryfinecoriaceousmicrosculptureintermixedwithveryfineandratherdensepuncta- tion, makingbodymoderatelylustrous. Punctationonhead (especiallymiddleofvertex) stronger, moderatelydeep, pronotumslightlylessstrongandmoredense, elytraevenfiner anddenser, onabdomenmoreindistinct; ontergiteVIIbothcoriaceousmicrosculpture andpunctationfadingposteriorly (asalsoonmostlyunexposedtergiteVIII), makingtipof abdomenmuchshinierthanrest. Pubescenceonforebodyratherdepressed, short, fineand dense (onelytrathemostdense), onabdomensomewhatlessdensebutnotlongerhairs, apicesoftergiteswitharowofconspicuouslylonghairs, abdominalsidesandapexwith afewdarkerandstrongerbristles. Strongdarkbristleonoutersideofsupraantennaltubercleatanteriorborderofeyeandonposterioredgeofvertexadjacenttotemples, similar onesrightbehindanteriorpronotalcornerandonsideat 3/5 length. Directionofsetation onedgesofhead (especiallyatsupraantennaltubercles) postero-lateral, onmostofvertex medialexceptanteriadneckgroovewhererathermixed. Pronotalsetationmostlymedially directed, butonmiddleofdiscturningslightlyantero-medial, posteriorhalfofmiddleof discdisctinctlyantero-medial, posteriorpronotaledgemostlyanterior. Elytraandabdomenwithposteriorlydirectedhairs. Antennae, legsandmouthpartswithveryshort, not conspicuoussetation, exceptforthestiff, darkerhairslightlydistalfrommiddleofeach tibiaandonesnearapicesoffemora. Elytrawiththeregularstifferlateralsetaeinconspicuous, practicallymixedinwithothersetaeonside.

Headslightlywiderthanlong, templesusuallystraight, withagentlecurveonthe side, roundedonposteriorpart. Middleofvertexverygentlyimpressed. Anteriorborder mm for Fig. 29 , 0.20 mm for Fig. 28 .

ofnecknotmarkedwithgroove, onlybychangeofmicrosculpture. Frontoclypealsuture appearingasfine, oftenshiniergrooveanddarkline (visibleonlyifheadlighter) connectingsupraantennaltubercles, similarlydarkerspotssituatedatbothsidesonmiddleofver- tex. Supraantennaltuberclesmoderatelydeveloped, weaklyseparatedfromvertex. Anten- naesomewhatelongate ( Fig. 15 ), 6thantennomereappearingsmallerthanadjacentones.

Pronotumweaklytransverse, 1.30× widerthanlong, justalittlewiderthanhead, pronotumwithonlytracesofimpressionsatsidesofunmarkedmidlineandposteriormar- gin. Anteriorcornersratherweaklyrounded, posteriorcornersverybroadly, sidesgently arched. Pronotalmarginalbeadvisibleonposteriormargin, anteriormarginonlygently arched (almoststraight) withtracesofamarginalbeadinmiddle. Scutellumlarge, setose anddull. Elytraquitelong, oneelytronalittlebitmorethantwiceaslongasbroad, quite flatandparallel-sided (verygentlydilatingposteriorly). Shouldersmoderatelydeveloped. Alongsuturewithfullydevelopedbutthinmarginalbead, mostlyatbroadlyrounded suturalcorners. Legsofmediumlength, tarsallobesbroaderatbasebutthinatapex, tibiae moderatelyfusiform, appearmuchwiderinmiddlethanatends.

Abdomen ( Fig. 8 ) veryweaklyfusiform, sidesmoreorlessstraightandparallel; widestinthemiddle, justveryslightlylesswidethanelytraatbroadestpoint. Posteriormargin oftergiteVIIwithlightcolouredanddistinctpalisadefringe.

Primaryandsecondarysexualfeatures – Malesimmediatelyrecognizablebyavariouslydevelopedbutalwaysconspicuous, posteriorlydirectedtoothonhindfemur ( Fig. 10 ). Sexesnotappearingdifferentinregulardorsalview. PosteriorcornersoftergiteVIII (similarinbothsexes) gentlypulledout, posterioredgeotherwisestraight. Malesternite VIIIasinFig. 28 , tergiteIXasinFig. 25 , sterniteIXasinFig. 26 . AedeagusasinFig. 43.

Distribution – ThespeciesisknownfromthenorthernareasofboththeEasternPa-

laearcticandtheWesternNearcticregions.

Remarks – Thespermathecaeinalltheprecedingtaxaareextremely weaklysclerotized, tosuchanextentthattheyareoftendifficulttoobserve. Theyareofasimpleboomerangshape, roughlyequalbreadthonthewhole length; thisoffersverylittleintermsofdiagnosis, thereforeonlyonespecimenisillustratedhere, theneotypeof Thinobiusangusticeps Fauvel.

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