Description of two new species of the genus Micranurida Börner, 1901 (Collembola: Neanuridae, Pseudachorutinae) from Russia, with notes on the genus Lanzhotia Rusek, 1985

2019·3.1 MB·

by  Adrian Smolis

©EntomologicaFennica. 3 October2012
Description of two new species of the genus Micranurida
Borner, 1901 (Collembola: Neanuridae, Pseudachorutinae)
from Russia, with notes on the genus Lanzhotia Rusek, 1985
Adrian Smolis,LouisDeharveng&AnneBedos
Smolis,A.,Deharveng,L. &Bedos,A.2012: Descriptionoftwonewspeciesof
the genus Micranurida Borner, 1901 (Collembola: Neanuridae, Pseudacho-
rutinae) fromRussia, withnotes onthegenusLanzhotia Rusek, 1985.—Ento-
mol. Fennica23: 149—154.
Micranuridarassicasp.n.andMicranaridapotapovisp.n.fromtheRussianFar
Eastarefullyillustratedanddescribed.Bothnewspeciesbelongtoasmallgroup
ofMicranurida speciescharacterizedbythickglobularsensillaonthoraxIIand
abdomenIV.RemarksonLanzhotiabraclzyceraRusek, 1985arealsoincluded.
A. Smolis Department ofEvolutionary Biology and Ecology, University of
Wroclaw, Przybyszewskiego 63/77, 51—148 Wroclaw, Poland; E—mail.‘ adek
@biol.ani.wroc.pl
L. Deharveng &A. Bedos, MuseumNationald’HistoireNatarelle, UMR 7205
France, CNRS/MNHN, CP50, 45rae Baflon, 75005 Paris, France; E—mail.‘
[email protected]
Received28April2011, acceptedI6Jane2012
1. Introduction culum, and highly reduced chaetotaxy on body
and appendages. Morphologically the genus
In 1901 Bomer established the genus Micranu— stronglyrecalls the generaAnarida Laboulbéne,
rida for his new springtail species Micranurida 1865,Lanzhotia Rusek, 1985, Rasekella Dehar—
pygmea from Europe. To date Micranurida in- veng, 1982andStaclzoratesDallai, 1973.Never-
cludes25speciesdistributedmainlyintheNorth- theless, an examination ofthe characters listed
ern Hemisphere, and only M. flaminensis Fer- aboveallowstoeasilyseparateMicranuridafrom
nandes&Mendonca,2004andM.wladimiriNajt them.
& Rubio, 1978 havebeen described from South Two new species belonging to the genus
America. MicranuridawerediscoveredduringtheCollem—
Mostspeciesofthegenushaveabodylength bolan investigations in Russian Far East. Their
ofonly0.3—0.5mmandarethesmallestmembers descriptions and taxonomic affinities are pre-
ofthe family Neanuridae. Micranurida species, sentedbelow.
besidestheiroftenminute size, arecharacterized
by simple and not complicatedpostantennal or-
gan, 0—5 (usually 0—2) eyes, simpleandreduced 2. Material and methods
mouthparts (mandibles rather thin with maxi-
mum5teeth,maxillaelongateandstyliformusu- TypespecimensarepreservedintheMuseumna-
ally without dentate lamellae, absence oflabial tional d’Histoire naturelle in Paris, France
setaL), completereductionoffurculaandretina- (MNHN) and the entomological collection of
150 Smolisetal. ° ENTOMOL. FENNICAVol. 23
WroclawUniversity,Poland(ZIWU). Terminol- setae,prelabrals4. Mandibles andmaxillae as in
ogy essentially follows Smolis and SkarZynski Figs. lfand g. Dorsal chaetotaxy ofhead as in
2004,andthefollowingabbreviationsareusedin Fig. 1a, seta a0 absent, unpaired seta (11 or even
the text: ant. I—IV = antennal segments I—IV, setae (11 present, seta p1 present. Headwith 2+2
AIIIO = antennal III organ, PAO= postantennal setaealongventralline (Fig. 1e).
organ,th. I—III=thoracictergaI—III,abd. I—VI= Dorsal chaetotaxy ofthorax andabdomen as
abdominaltergaI—VI. in Figs. la and i. Body setae short and fine,
smoothandacuminate. ThoraxIwith3+3 setae.
Sensillar formula of body 022/llll1. Lateral
3. Taxonomy sensillaonth.IIandabd.IVglobular(Figs. la,i),
othersensillaslender,thinandlongerthannearby
3.1.Description ofMicranuridarussica ordinary setae. Setae m on th. II—III present.
4
sp. n. (Fig. 1) Setaea3 anda onth. II—IIIpresentora3 sporadi-
4
callyandasymmetricallyabsent, setaea2 absent.
Material examined. Holotype: female on slide: Setaep2presentonth. II—abd. IV, inforwardpo-
Russia,PrimorskyiKray,KhasanArea,Barabash sition. Setae a3 on abd. I—IIIpresent, setaep3 on
[43°11’ N 131°29’E], deciduous forest near old abd. IV andsetae a1 onabd. Vpresent. Thoracic
quarry, soil andlitter, 27.IX.2004, leg. Romuald stemawithoutsetae,ventraltubewith4+4 setae.
Jacek Pomorski, ZIWU. Paratype: juvenile on Unpairedsetaabsenton abd. II sternum, present
slide, samedataasholotype, MNHN. Otherma- on abd. III. Six microsetae on furcula rudimen-
terial: 3 females and 1 juvenile, MNHN and tary (Fig. 1d).
ZIWU. Leg chaetotaxy from I to III as follows:
Diagnosis. The species is well differentiated tibiotarsiwithl7, l7, l6(setaMpresent,setaeA3
by: fusionofsensillaAandBonant. IV, slightly andA absent) andwithout clavate tenenthairs;
6
curved ventral guard sensillum in AIIIO, 1+1 femoraI,II,IIIwith 12, ll, 10. Trochanterswith
eyes, oval PAO, globular sensilla on th. II and 5 each. CoxaeI,II,IIIwith3,6,6; subcoxaeI,II,
abd. IV, presence ofsetae p2 on abd. I—IV and IIIwith l, 2, 2. Clawswithneitherinnernorlat-
tibiotarsalformula: l7, l7, 16. eralteeth. Empodialappendageabsent.
Description. Habitus typical of the genus Etymology. Namedafteritsterratypica,Rus-
(Fig. la). Body length (without antennae) 0.32— s1a.
0.44 mm (holotype: 0.36 mm). Colour of the Discussion. Themorphologicalcharacters of
bodywhite.Granulationrathercoarse,withareas whitebody,thicklateralsensillaonth.IIandabd.
oflargergranules as inFig. li. IV, ventral guard sensillum of ant. III slightly
Antennae slightly shorter than head(Fig. 1). curved, fusionofantennalsensillaAandBplace
Ant. Iwith 7 setae, Ant. IIwith 11 setae. Dorsal Micranurida russica sp. 11. near M. bescidica
andventral chaetotaxy ofant. III—IV as in Figs. Smolis & SkarZynski, 2004, described from the
lb and c. Ant. III and IV fused dorsally. AIIIO Carpathians (centralEurope, Smolis & SkarZyn-
withtwosmallinternalsensillaandtwoequal,cy- ski 2004). The new species differs fromitinthe
lindrical, slightly curved guard sensilla. Ventral presence of1+1 eyes (v. absent), presence of9—
microsensillum on ant. IIIpresent. Ant. IVwith 10 vesicles inFAQ (v. 5—7), antennal sensillaC
erectlargesimpleapicalvesicle,setai,verysmall and D separate (v. fused), presence ofseta i on
subapicalorganite(or),microsensillum(ms) and
6welldifferentiatedsensillaA—F. SensillaC, D,
EandFdrop-like. SensillaAandBhammer-like V Fig. 1.Micranun'darussicasp.n.—a. Dorsalview
andfusedtogetherlinearly. ofhead,thoraxandfirstabdominalsegment.—b.
AntennalsegmentsIll—IV,ventralside.—c.Antennal
Oneunpigmentedandrelativelylargeeyeon
segments Ill—IV, dorsalside.—d.Abdomen,ventral
each side ofheadpresent. 3+3 setae oc present. view.—e. LabiumandsetaeVi.—f. Mandible.—g.
Postantennalorganoval, consistingof9—10 sim- Maxilla.—h. Postantennalorganandoculararea.—i.
plevesicles (Fig. 1h). Buccal cone short, labium Chaetotaxyandgranulationofabdominalterga lll—Vl.
asinFig. 1e,withoutpapillae.Labrumwith4,3,4 Scalebars0.01 mm.
ENTOMOL. FENNICAV01. 23 ° A newPalaearcticSpeciesofMicranurida 151
\xnxL,.xk\‘v‘.a..1J(.tr6a,.aAaIHrarN\ufr,a~P\y.Iw.r\4V....a.r1xa.1Vi1isf,Ia1ryy......aA ~QR(5t:r:r.rraI.5r...r.nrrrrrn ‘ss.n\ax.5 1JII
1I rI.. )\12
\.\U \.
u.\.3.
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\.\v.
\....IU.
....\m,\.n.w|.9\\.,..‘...‘
.\3P\u
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3v...r.D.fl
.4."
rhfirpm
Smolisetal. 0 ENTOMOL. FENNICAV01. 23
w
ENTOMOL. FENNICAVol. 23 ° A newPalaearcticspeciesofMicranurida 153
ant. IV(V. absence), presenceofsetaep2 onabd. 2a, seta a0, eVen setae (11 and setae p1 present.
I—IV(V.absence)andpresenceof17, 17, 16setae Headwith2+2 setaealongVentralline.
ontibiotarsiI—III(V. 14, 14, 14). Dorsal chaetotaxy ofthorax andabdomen as
inFig. 2a. Bodysetaeshortandfine, smoothand
acuminate.ThoraxIwith3+3setae. Sensillarfor-
3.2.Description ofMicranuridapotapovi mulaofbody022/11111.Lateralsensillaonth.II
sp. n. (Fig.2) andabd.IVglobular(Fig.2a),othersensillaslen-
der,thinandslightlylongerthannearbyordinary
Material examined. Holotype: female on slide: setae.Onth.II—IIIsetaem anda2absent,a3anda
4 4
Russia, Primorskyi Kray, Partizansk Region, present. Setaep2presentonth. II—abd. IV. Setae
EkaterinOVka [42°55’ N 133°02’E], Chandalaz a3 onabd. I—IIIanda1 onabd. Vpresent, setaep3
Range, forest soil, Berlese extraction, 26.IX. onabd. IVabsent. Thoracic stemawithoutsetae,
2004, leg. LouisDeharveng&AnneBedos(Ru- Ventraltubewith4+4setae.Unpairedsetaabsent
103), MNHN. on abd. II sternum, present on abd. III. Six
Diagnosis. Thespeciesiseasilyrecognizable microsetaeonfurcularudimentary(Fig. 2j).
due to: 6 drop-like sensilla A—F on ant. IV, Legsetation(Fig.2handi)fromItoIIIasfol-
strongly S—shaped Ventral guard sensillum in lows: tibiotarsi with 12, 12, 11 and without
AIIIO, absenceofeyes, ellipticalPAO, thepres- claVatetenenthairs (all setae T absent; setaeA3,
enceofsetaea3 onabd. I—III, setaep2 onabd. IV A6andMabsent); femoraI,II,IIIwith9—10, 11,
andtibiotarsalformula: 12, 12, 11. 10. Trochanterswith5 each. CoxaeI, II, IIIwith
Description. Habitus typical of the genus 3, 7, 7; subcoxaeIIIwith 1, 2, 2. Clawswithnei-
(Fig.2a).Bodylengthofholotype:0.41mm.Col- therinnernorlateralteeth. Empodial appendage
our ofthe bodywhite. Granulation fine and ho- absent.
mogenous. Etymology. The new species is dedicated to
Antennaeslightlyshorterthanhead(Fig.2a). MikhailPotapOV,anexcellentRussiancollembo-
ChaetotaxyofantennaeasinFigs.2cand(1.Ant.I logistandourfriend.
with7setae,Ant.IIwith 11 setae.Ant.IIIandIV Discussion. Though only one specimen has
fused dorsally. AIIIO with two small internal beencollected,thenewspeciesiswellcharacter-
sensilla, strongly S-shaped Ventral guard ized, itschaetotaxyisperfectlysymmetrical, and
sensillum(sgV) andslightly curveddorsal guard itis anadult: wethereforedecidedto describeit.
sensillum (sgd). Ventral microsensillum on ant. Micranuridapotapovisp.n.ismostsimilartoM.
IIIpresent.Ant.IVwitherectlargesimpleapical sensillata (Gisin, 1953) (westEuropeanspecies)
Vesicle, setai,Verysmallsubapicalorganite(or), in strongly S—shaped Ventral guard sensillum of
microsensillum (ms) and 6 well differentiated AIIIO, ellipticalPAO, fineanduniformgranula-
drop-like sensillaA—F. tion ofbody, ant. IVwith seta i, similar chaeto-
Eyes absent. 3+3 setae ocpresent. PAO 0Val taxy ofth. II—III (setae m absent) and identical
4
consistingof11 simpleVesicles(Fig.2b).Buccal number and arrangement of tibiotarsal setae
coneshortandwide,labiumasinFig.2g,without (tibiotarsi I, II, III with 12, 12, 11 setae respec-
papillae. Labrum with 4, 4 setae, prelabrals 4. tiVely). NeVertheless, they can be easily distin-
MandiblesandmaxillaeasinFigs.2eandf,rela- guishedby the following characters: number of
tiVelystrong.DorsalchaetotaxyofheadasinFig. sensilla on ant. IV (in M. potapovi 6 V. in M.
sensillata 5), localizationoftwo smallsensillain
AIIIO (in M potapovi both between guard
4 Fig.2. Micranuridapotapovisp. n.—a. Habitusand sensilla V. in M sensillata one between guard
dorsalchaetotaxy.—b. Postantennalorgan.—c.An- sensillaandsecondoutside),presence/absenceof
tenna,ventralside.—d.Antenna,dorsalside.—e.
Mandible.—f. Maxilla.—g. Labiumandlabrum.—h. seta aO on head (inMpotapovipresentV. inM
sensillataabsent)anddorsalchaetotaxyofabdo-
Chaetotaxyofcoxa,trochanter,femurandtibiotarsus,
dorsolateralview.—i.Chaetotaxyofcoxa,trochanter, men (in M poiapovi setae a2 on abd. I—III and
femurandtibiotarsus,ventrolateralview.—j.Abdomi- setae p2 on abd. IV present V. in M sensillata
nalsegmentsll—Vl,ventralview.Scalebars0.01 mm. mentionedsetaeabsent).
154 Smolisetal. ° ENTOMOL. FENNICAVol. 23
4. Notes on the genus (inbalta 4/3,2,4V. inbrachycem 2/2,4,4), inthe
Lanzhotia Rusek, 1985 number ofmandibular teeth (in balta 3—4 V. in
brachycera2), inthepresence/absenceofbosses
Arrangement, number and shape ofsensilla on in furcal area (in balta absent V. in brachycera
third and fourth antennal segments are some of present), and in the number ofsetae on Ventral
thebestdiagnosticcharactersinthetaxonomyof tube (in balta 4+4 V. in brachycera 3+3). In the
Micranurida. Morphological modifications and lightoftheseobservationswestatethatthetaxo-
presence/absenceofsomeantennalstructuresare nomical status ofLanzhotia brachycera is un-
common within the genus, connected probably clear, andundoubtedly it needs verification and
with minute size of most members and their furtherstudiesonthebasisofthetypematerialof
deeply edaphic lifestyle. Among Micranurida thespecies. Theinvestigationshouldexplainand
species,M. balta Fjellberg, 1998 (reportedfrom resolvethequestionofthepossiblesynonymyof
Europe: Sweden, DenmarkandPoland) is easily thementionedgenuswithMicranurida.
recognized by its 10 dagger-like sensilla (see
Smolis&SkarZyr'iski2005:Figs.4—6). Thesame Acknowledgments.Wearegreatlyindebtedtoanonymous
conspicuous condition is known by us only in reviewersfortheirvaluableandhelpfiilcomments.
Lanzhotia brachycera Rusek, 1985 (see Rusek
1985: Figs. 2A, B), amember ofthe monotypic References
genusdescribedfromCzechRepublic.Adetailed
studyoftheoriginaldescriptionofL. brachycera Borner, C. 1901: Neue CollembolenformenundzurNo—
and materials of M. balta (including types) menclaturderCollembolaLubb.7ZoologisherAn—
showedthatbothtaxahavemany other similari- zeiger24: 6967712.
ties: absence ofeyes, elongated sensillum B on RuseCke,nJ.tr1a9l8E5u:rLoapnezh(Cotohlilaembrbaoclhay,cPesraeugdeanc.hno.r,ustipd.ane.)f.ro7m
ant. IV, rounded PAO, lanceolate and slightly Actaentomologicabohemoslovaca82: 1757179.
thickenedlateralsensillaonth.IIandabd.IV,ab- Smolis,A. & SkarZynski, D. 2004: Anewspeciesofthe
senceofsetaep2onabd. I—IV;butalsoimportant genusMicranurida Borner, 1901 fromPoland (Col—
differences inthenumberofvesicles inPAO (in lembola:Neanuridae).7Genus 15 (1): 175.
Smolis,A.&SkarZynski,D.2005:NotesonMicranurida
balta 7—9 V. in brachycera 6—7), in the pres- balta Fjellberg, 1998 (Collembola: Neanuridae), a
ence/absenceofcryptopygy(inbaltaabsentV. in springtailspeciesnewforthePolishfauna.7Polskie
brachycerapresent), inthechaetotaxyoflabrum PismoEntomologiczne74: 57760.