Trachytes mahunkai, Kontschán, 2013

Kontschán, J., 2013, Species Of The Genus Trachytes Michael, 1894 (Acari: Uropodina: Trachytidae) Of Romania, Acta Zoologica Academiae Scientiarum Hungaricae 59 (4), pp. 321-336 : 325-330

Trachytes mahunkai sp. n.

(Figs 1–16)

Materialexamined. Holotype. Female ( HNHM), Petroşani, 1.5 kmbeforeLainici, beechforest, 45°16.255’, 23°22.542’, 413 m. a.s.l., leaflitter, 27.X.2007, CsCs- KJ-VVP. Para- types 5 females (3 in HNHM, 2 in NHMG), 5 males (3 in HNHM, 2 in NHMG) locality and datesameasintheholotype. 2 femaleparatypes, Oltenia, PoianaMărnului, pineforest, N45°21.083’, E22°38.284’, 1371 m, leaf litter of pine, 02.XI.2007, CsCs- KJ-VVP.

Description. Female. Lengthofidiosoma 630–640 μm, width 370–440 μm (n = 6). Shapeofidiosomapear-like.

Dorsalidiosoma (Fig. 1). Wideandribbedlateralsectionsonvertexabsent (Fig. 2). Marginalanddorsalshieldsfusedanteriorly, dorsalshield ca 285–290 μmwideatcaudalmargin. Pygidialshieldsmallandrounded (ca 35–37 μmlongand ca 40–41 μmwide, placedbetweenposteriormarginofdorsalshieldandanteriormarginofpostdorsalshield. Postdorsalshield ca 73–76 μmlongand ca 310–320 μmwide. Allsetaeondorsalandpost- dorsalshieldssmooth, needle-likeand ca 39–50 μmlong, setaeoncentralareaofdorsal shieldplacedonsmall, stronglysclerotizedplatelets. Setaeonmarginalshieldneedle-like and ca 26–30 μmlong. Surfaceofdorsalshieldcoveredbydeep, ovalpits (Figs 2–3), other shieldsondorsalbodywithsmoothsurface (Fig. 3).

Ventralidiosoma (Fig. 4). Sternalsetae (St1-St3) shorter (ca 15–23 μm), St4-St5 longer (ca 40–42 μm) smoothandneedle-like. St1 situatednearanteriormarginofsternalshield, St2 atlevelofposteriormarginofcoxaeII, St3 nearanteriormarginofgenitalshield, and theirlength ca 7–9 μm. St4 situatedatlevelofcentralareaofcoxaeIII, St5 onadgenital platelets, St6 placednearbasalmarginofgenitalshield. Surfaceofsternalshieldcovered bysmallovalpits. Sternal, ventralandinguinalshieldsnotfused. Surfaceofventralshield coveredbyovalpits. Inguinalshieldwithonepairlong (ca 45 μm) andneedle-likesetae andcoveredbyirregularpits. Sevenpairsofsetaesituatedonventralshield (Fig. 8) similar inshapeandlengthtosetaeoninguinalshield. Twopairsofsetaeonthemembranouscu- ticle, betweenventralandinguinalshieldspresent, centralpairofsetaeshorter (ca 20 μm) than lateral pair (ca 43 μm) (Fig. 6). One paratype, one of central pair of setae on membranouscuticleplacedonventrianalshield (Fig. 7). Twopairsofadanalsetaeandonepostanal setaneedle-like, short (ca 18–23 μm) andsituatednearanalopening.

Genital shield ca 140–142 μm long and ca 110–112 μm wide, its shape ax-like, with roundedanteriormargin, itssurfacecoveredbyreticulatesculpturalpatternonbasalarea. Adgenitalplateletspresentwithasail-shapedprocessesontheiroutermargins. Genital shieldsituatedbetweencoxaeIIIandIV (Fig. 5). Peritremeslongandstraight, stigmata situatedbetweencoxaeIIandIII. Tritosternum (Fig. 9) withwidebase, tritosternallaciniae dividedintotwolongbranches.

Gnathosoma (Fig. 9). Corniculihorn- like, internalmalaelongerthancorniculiand smooth. Hypostomalsetaeh1 long (ca 70 μm) andsmooth, h2 short (ca 23 μm) andsmooth, h3 similartoh1 inshape, ca 55 μmlong, h4 marginallyserrateand ca 17 μmlong. Cheli- Figs 1–4. Trachytes mahunkai sp. n., female, holotype: 1 = dorsal view of body, 2 = vertex, 3 = caudalareaofdorsalbody, 4 = ventralviewofbody (arrowshowsthesail-shapedprocess ontheoutermarginsofadgenitalshield).

ceraewithlongandsharpenedapicalprocessonfixeddigit, movabledigitshorterthan fixeddigit. Epistomemarginallyserrate. Palpswithtwoserrateventralsetae, othersetae on palp smooth ( Fig. 10 ).

Figs 5–9. Trachytes mahunkai sp. n., female: 5 = intercoxal area, 6 = setation on membranous cuticleinholotype, 7 = setationonmembranouscuticleinaparatype, 8 = setaeandorna-

mentationonventrianalshield, 9 = ventralviewofgnathosomaandtritosternum.

Legs. LegIwithsmallambulacralclaws ( Fig. 11 ) andwithsmoothandneedle-like setae; otherlegsbearingsmoothandserrate, pilosesetae ( Figs 12–14 ).

Male. Lengthofidiosoma 610 μm, width 370 μm (n = 5). Shapeanddorsalaspectof idiosomaasinfemale, exceptthecaudalareaofdorsalidiosoma: pygidialshieldabsent, postdorsalshieldnarrow (ca 44–46 μmlongand ca 300–305 μmwide) andcoveredbyoval pits (Fig. 15), setaeonpostdorsalshieldasinfemale.

Ventralaspectofidiosoma (Fig. 16). Surfaceofsternalshieldwithsomeshallowoval pitsoncentralareaandwithdeepirregularpitsonmarginalareas. Fivepairsofsmooth, short (ca 10–12 μm) andneedle-likesternalsetaepresent. St1 placedneartoanteriormarginofsternalshield, St2 atlevelofposteriormarginofcoxaeII, St3 atlevelofcentralarea ofcoxaeIII, St4 atlevelofanteriormarginofgenitalshield, St5 nearposteriormarginof genitalshield. Inguinalandventrianalshieldsfused. Positionandshapeofventralsetae andornamentationofventralshieldasinfemale. Genitalshieldcircular (ca 60–62 μmlong and ca 55–56 μmwide), withoutsculpturalpatternandwitheuanalsetae. Itsituatedbe- tweencoxaeIV.

Nymphsandlarvaeunknown.

Etymology. Idedicatethenewspeciesinmemoryofmydearteacher, colleagueand friend, theexcellentacarologist, SándorMahunka (1937–2012), whohelpedmyworkinthe fieldsofacarologyandzoology.

Remarks. Currentlythree Trachytes speciesareknownwithsail-shaped processesontheoutermarginsoftheadgenitalplatelets. Theseprocessesare roundedinthespecies T. decui Huţu, 1983 , andpointedinthe T. micropunctata Huţu, 1973 andinthenewone. Thedistinguishingcharactersaresummarized in Table 1.

Figs 15–16. Trachytes mahunkai n. sp., male, paratype: 15 = caudal area of dorsal body, 16 = intercoxalarea.

Ornamentationofdorsalshielddottedcoveredbyovalpits

Ornamentationofinguinalshielddottedcoveredbyirregularpits

Ornamentationofventrianalshielddottedcoveredbyovalpits

Figures

Figs 10–14. Trachytes mahunkai sp. n., female, holotype: 10 = palp, 11 = leg I, 12 = leg II, 13 = leg III, 14 = leg IV (ventral view).