Thinobius paramicros, Makranczy, 2014

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 : 35-36

Thinobius paramicros sp. n.

( Figs 11–12 , 19 , 38–40 , 45, 51–54)

Typematerial – Holotype (m): [ ALGERIA: Tamanrasset,] Hoggar , AguelmaneIm- errha [Imeghra, 23°26’57’’N, 5°47’06’’E], u. 2000 m [1850m], 23-25.III.1928, [leg. Peyerimhoff, danslesablehumideauborddelapoched’eau] MissionduHoggarFévrier- Mai 1928 ( MNHP) ; Paratypes (5): samedataasholotype (2 MNHP, 1 m, HNHM, 1 f, collBernhauer, FMNH, 1 f, collBernhauerviaScheerpeltz, FMNH) .

Description – Measurements (in mm, n = 6): HW = 0.24 (0.23–0.24); TW = 0.23 (0.225 – 0.235); PW = 0.27 (0.255 –0.275); SW = 0.28 (0.26–0.29); AW = 0.31 (0.29–0.32); HL = 0.20 (0.19– 0.21); EL = 0.07 (0.07–0.08); TL = 0.06 (0.06–0.07); PL = 0.20 (0.19–0.21); SL = 0.35 (0.33–0.36); SC = 0.31 (0.29–0.33); FB = 0.73 (0.61–0.89); BL = 1.31 (1.25–1.37). Body ( Fig. 54 ) very slightly bicoloured. Head, pronotumandabdomenslightlyreddishdarkbrown, elytrareddish mediumbrownwithadarkerareabehindscutellumextendingtoshoulders. Legsand mouthpartsmediumbrown, apicesoffemoraandbothendsoftibiaeoftenlighter, together withtarsi; basalpartofantennamuchlighter (yellowish) thanapicalarticles, latteroften significantlyblackish. Forebodywithveryfinecoriaceousmicroreticulation, ratherdull. Punctationonforebodyratherdenseandsofinethathardlydiscernible. Discsofabdominaltergiteswithaparticulartypeoftransversalmicrosculptureandlongitudinalmicrosetationarrangedintheminutetransversalridgesthatcausesaslightiridescenteffect. Pubescenceonforebodydepressedandveryshort, fineanddense (onelytrathemostdense), onabdomenapicesoftergiteswitharowoflonghairs, andasparsesetationcomposedof similarbutshorterhairs; abdominalsidesandapexwithafewdarkerandstrongerbristles. Strongdarkbristleonoutersideofsupraantennaltubercleatanteriorborderofeye (thosenearouterposterioredgeofvertexweaklydeveloped), similaronesrightbehind anteriorpronotalcornerandonsideat 3/5 length. Setationanteriorlydirectedonheadand pronotum, directionposterioronelytraandabdomen. Antennaewithlonger, darkerhairs onbasalarticles, legsandmouthpartswithveryshort, notconspicuoussetation, exceptfor thestiff, darkermid-tibialhairsondonesnearapicesoffemora. Sidesofelytrawiththree suchstiffsetaeaboutequallydistributedonlengthofside.

Head ( Fig. 11 ) slightlywiderthanlong, templesusuallystraight, withagentlecurve ontheside, roundedonposteriorpart. Middleofvertexwithaslighttransversalimpression. Anteriorborderofneckisstronglymarkedwithashiny, arched, deepgroove. Frontoclypealsutureappearingasindistinctgrooveandadarkline (visibleonlyifhead lighter) connectingsupraantennaltubercles, similarlydarkerspotssituatedatbothsides onmiddleofvertex. Supraantennaltuberclesmoderatelydeveloped, separatedfromver- texbylongitudinalimpression. Antennaemediumlong ( Fig. 19 ), 6thantennomereappear- ingaswideasadjacentones.

Pronotum ( Fig. 12 ) weaklytransverse, 1.35× widerthanlong, justalittlewiderthan head, anteriormiddlepartofdisctransversallyalittleimpressed, averyslightlongitudinalimpressedlinenearanteriorcorners. Anteriorcornersmoderatelyweaklyrounded, posteriorcornersverybroadly, sidesalmostinarchwithposteriormargin. Pronotalmar- ginalbeadvisibleonposteriormargin, anteriormarginslightlypulledaheadinmiddlebut withoutvisiblemarginalbead. Scutellumsmall, ifexposed, shinierthanadjoiningareas. Elytraratherlong, oneelytronabouttwiceaslongasbroad, quiteflatandparallel-sided (verygentlydilatingposteriorly). Shouldersmoderatelydeveloped. Alongsuturewithout eventracesofmarginalbead; suturalcornersbroadlyrounded. Legs ofmediumlength, tarsallobessmallandthin, inconspicuous, tibiaefusiform, appearmuchwiderinmiddle thanatends.

Abdomenveryweaklyfusiform, sidesmoreorlessstraightandparallel; widestat 1/3 length, justveryslightlylesswidethanelytraatbroadestpoint. Posteriormarginoftergite VIIwithpalisadefringeandposteriorcornersbroadlyrounded.

Primaryandsecondarysexualfeatures: Sexesnotappearingdifferentinregulardor- salview. PosterioredgeoftergiteVIII (similarinbothsexes) gentlyconcave, arched. Male sterniteVIIIasinFig. 38 , tergiteIXasinFig. 39 , sterniteIXasinFig. 40 . AedeagusasinFig. 45. FemalegenitalappendageasinFig. 51, spermathecaasinFigs 52–53.

Etymology – Thespecificepithetreferstothecloserelationshiptothesisterspecies,

Thinobius micros .

Distribution – Asopposedto T. micros thatreachesasfarsouthastheNorthernAtlas MountainsinAlgeria, thisspeciesoccursintheSouthernAlgerianHoggarMassiv, andis probablyendemictoit.

Remarks – The members of the T. linearis group can now be divided into threedifferentspeciescomplexes. Onecontains T. heterogaster alone, theother is constituted by the T. micros – T. paramicros pair, while the T. linearis complex containsalltheremainingspecies: T. linearis , T. petzi , T. bicolor , T. brunneipennis , T. holdhausi . Ofcourse, thisissubjecttochangeasmorespeciesbecome knownworldwide.

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Acknowledgements – Theauthorwishestoexpressthankstotechnicians, collection managersandcuratorsofthemuseumsandinstitutionswhererelevanttypesaredeposited, AzadehTaghavianandThierryDeuve (Paris) YvonnickGérardandDidierDrugmand (Brussels), HaroldLabrique (Lyon), MargaretK. ThayerandJamesH. Boone (Chicago, IL), RogerG. BoothandMartinJ. D. Brendell (London), LotharZerche, StephanBlankandLutz Behne (Eberswalde, thenMüncheberg), AlešSmetanaandAnthonyDavies (Ottawa, ON), PhilipD. Perkins (Cambridge, MA) andHaraldSchillhammer (Wien), whoalsoprepared thecolourhabitusphotos. Numerousothercolleagueswereinvolvedindiscussionsover thepastdecadeandprovidedalotofcruciallyimportantinformations, MichaelSchülke (Berlin), MarcTronquet (Molitg- les-bains), AlNewton (Chicago) beingthemostimportant .

Figures

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 34–40. 34 = T. petzi Bernhauer, 1908, male sternite VIII. 35–37 = T. micros Fauvel, 1871, male, 35 = sternite VIII, 36 = tergite IX, 37 = sternite IX. 38–40 = T. paramicros sp. n., male, 38 = sternite VIII, 39 = tergite IX, 40 = sternite IX. Scales: 0.08 mm for Fig. 36, 0.09 mm for Fig.

Figs 54–55. 54 = T. paramicros sp. n., habitus, 55 = T. gurzoeszterae Makranczy, 2009, habitus.