Thinobius micros Fauvel, 1871

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 : 33-34

Thinobius micros Fauvel, 1871

( Figs 6 , 18 , 35–37 , 44, 48–50)

Thinobius micros FAuvel, 1871: 163 [= 1872: 137].

Thinobius algiricus FAuvel, 1898: 94 ., syn. n.

Thinobiusernesti BeRNhAueR, 1908: 332. (newsynonyminSChülKe & MAKRANCZY 2011)

Examinedtypematerial – Thinobiusmicros Fauvel – Lectotype (m), bypresentdesignation: “Fréjus \ micros; Fauv. \ R. I.Sc. N.B. 17.479; Coll. etdet. A. Fauvel \ Syntype \ m \ Lectotypus; Thinobius ; microsFauvel; des. Makranczy, 2001 \ Thinobius ; micros Fauvel ; det. Makranczy, 2010” ( ISNB); Paralectotypes (4): samedataaslectotype (1m, 3f, ISNB); Thinobiusalgiricus FAuvel – Lectotype (f), bypresentdesignation: “[ Algeria: Djebel] Ouarsenis \ confonduavec; longipennis \ algiricus; Fvl. n. sp.; Désiré [underlined] \ Ty- pus \ Collection; Vauloger \ Lectotypus; Thinobius ; algiricusFauvel; des. Makranczy, 2010 \ Thinobius ; microsFauvel; det. Makranczy, 2010” (coll. Peyerimhoff, MNHP); [Forthe type of Thinobius ernesti , see Makranczy & Schülke, 2001: 191.] .

Redescription – Measurements (in mm, n=6): HW = 0.20 (0.19–0.20); TW = 0.19 (0.185– 0.20); PW = 0.21 (0.205–0.22); SW = 0.22 (0.21–0.22); AW = 0.24 (0.23–0.24); HL = 0.18 (0.17– 0.19); EL = 0.07 (0.06–0.07); TL = 0.05 (0.05–0.06); PL = 0.17 (0.16–0.175); SL = 0.28 (0.26–0.29); SC = 0.24 (0.23–0.25); FB = 0.61 (0.59–0.64); BL = 1.10 (1.03–1.19). Body ( Fig. 6 ) very slightly bicoloured. Head, pronotumandabdomenslightlyreddishdarkbrown, elytrareddish mediumbrownwithadarkerareabehindscutellumextendingtoshoulders. Legsand mouthpartsmediumbrown, apicesoffemoraandbothendsoftibiaeoftenlighter, together withtarsi; basalpartofantennamuchlighter (yellowish) thanapicalarticles, latteroften significantlyblackish. Forebodywithveryfinecoriaceousmicroreticulation, ratherdull. Punctationonforebodyratherdenseandsofinethathardlydiscernible. Discsofabdominaltergiteswithaparticulartypeoftransversalmicrosculptureandlongitudinalmicrosetationarrangedintheminutetransversalridgesthatcausesaslightiridescenteffect. Pu- bescenceonforebodydepressedandveryshort, 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.

Headslightlywiderthanlong, templesusuallystraight, withagentlecurveonthe side, roundedonposteriorpart. Middleofvertexverygentlyimpressed. Anteriorborder ofneckisstronglymarkedwithashiny, arched, deepgroove. Frontoclypealsutureappear- ingasweakgrooveandadarkline (visibleonlyifheadlighter) connectingsupraantennal tubercles, similarlydarkerspotssituatedatbothsidesonmiddleofvertex. Supraantennal tuberclesmoderatelydeveloped, separatedfromvertexbylongitudinalimpression. An- tennaemoderatelyshort ( Fig. 18 ), 6thantennomereappearingaswideasadjacentones.

Pronotumweaklytransverse, 1.25× widerthanlong, justatinybitwiderthanhead, withonlytracesofimpressionsinanteriorhalfofmiddleofdiscandnearanteriorcor- ners. Anteriorcornersmoderatelyweaklyrounded, posteriorcornersverybroadly, sides almostinarchwithposteriormargin. Pronotalmarginalbeadvisibleonposteriormargin, anteriormarginslightlypulledaheadinmiddlebutwithoutvisiblemarginalbead. Scutellumsmall, ifexposed, shinierthanadjoiningareas. Elytralong, oneelytronabouttwice aslongasbroad, quiteflatandparallel-sided (verygentlydilatingposteriorly). Shoulders moderatelydeveloped. Alongsuturewithouteventracesofmarginalbead; suturalcorners broadlyrounded. Legsofmediumlength, tarsallobessmallandthin, inconspicuous, tibiae fusiform, appearmuchwiderinmiddlethanatends.

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

Primaryandsecondarysexualfeatures: Sexesnotappearingdifferentinregulardor- salview. PosterioredgeoftergiteVIII (similarinbothsexes) gentlyconcave, arched. Male sterniteVIIIasinFig. 35 , tergiteIXasinFig. 36 , sterniteIXasinFig. 37 . AedeagusasinFig. 44. FemalegenitalappendageasinFig. 48, spermathecaasinFigs 49–50.

Distribution – Obviouslyaveryrareandlocalspecies, possiblyextinctfrommost ofitsformerrange. ThisisindicatedbyitsoldrecordfromAustria, whilenotcollectedin CentralEuropeinthepastcentury. TheNorthernAfricanoccurrencesuggeststhatitoriginallyhadcircum-mediterraneandistribution.

Remarks – Theaedeagusdrawingof “ T. ernesti ” inMAKRANCZYandSChül- Ke (2001) wasmadebasedonitspoorlypreservedholotypewiththeaedeagus ratherdistorted. Theherepresentednewillustrationisbasedonmorespecimens, improved, soshouldsubstitutefortheearlierfigure. Therearestillonly therespectivetypematerials (morethanahundredyearsold) availableforthis species. SincePeYeRimhoff’ s (1931) identification (basedonatypestudy) of “ T. algiricus ” isincorrectandinfactreferstoaverysimilarbutsignificantlylarger, clearlydistinctspecies, thelatterhastobedescribedasnewbelow.

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 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.