Incabates Hammer and Setincabates gen. nov. (Acarida: Cryptostigmata: Haplozetidae) from South Australian soils

9 Pages·1993·3.4 MB·English

frAnsaex(<m ofMr foyu) Society cf& Aust., (1993). 117(2), 77-85
IXCA&iTESHAMMERANDSETINC4RATESGEN. NOV. (ACAREQA: CRYFIOSTIGMATA:
HAPLOZETIDAE) FROM SOUTH AUSTRALIAN SOILS
by D. C. Lee*
Summary
Ltfc,D. C. (1993)IncubatesandSetincabatesgen. oav. (Auirida:Cryptostigmata: Waplozetidae) fromSouth Australiansoils.
Team. * SM- & r*tf* H7(2), 77-85, 4 June, 1993.
IncabatesHammeriscommentedonandanalliedgenua^Setincabatesgen. nov.,established.Threenewspeciesaredescribed
from South Australian soils: I macronudussp. nov.. /. pmctatussp, nov. amiS. hypersetosussp, nov. (type). /. angustus
Hammer,previouslyknownfromNewZealand,isnewly recordedfromAustraliaand/. mediusHammerisnewlyregarded
asitsjuniorsynonym.Akeyisgivenfortheadultsofthesefourspecies.ThisisthefirstrecordofIncabatesfromAustralia.
An African species previously grouped in Incabates is newly combined as Muliercufa longisaccula (Mahunka).
KevWords: Incabates angustus Hammer, incabates macronudus sp. nov., Incabatespunctatus sp. nov., Setincabates
hypersetosus gen. nov.. sp. nov. Haploxetidae, Acarida. soils* South Australia.
f
totreduction 2and 3, withthetotal setaepresent ineach file (e.g.
6Z) indicated by number coming first, whilst a
The genus Incabates Hammer, i%l and a similar particularseta (e.g. Z6) would havethe number last.
unUescribedgenusareexaminedaspartofanongoing The venter and legs have been described only for
studyofsarcoptiformmitessampledfromnineflorally Incabatespunctatusbecauseoftheirunifonnitywithin
diverseSouthAustraliansites, andforwhich Lee(1987) the genus. The abbreviations for zoogeographical
provided an introduction to the relevantwork on the regions follow Lee (1970, Fig. 427). Descriptions of
advanced oribate mites. The relevant mites are from eggsare based onthose stillwithinthe femalesoma.
fitiO and plant Inter or moss, under either savannah All material was examined using a Nomarski
woodland, selerophyll forest, mallee or coastal interferencecontrastdevice. Allmeasurementsare in
vegetation at only four ofthe sites. micrometres (jiui) and were made using an eyepiece-
Incabates is grouped in Maplozetidae Grandjean, micrometer at x250 magnification.
&
1936, which has been discussed by Lee Shepherd
(1990) in considering Magnobates Hammer, 1967. Key toAustralianIncabatesandSetincabatesspecies
Relationships between Incabates, the newgenus and (adults)
someotherhaplozetidgeneraarediscussed. /. angustus I. Thirteenpairsofhysteronotal seta.HysteronotAl foramen
Hammer, 1967isnewlyrecordedfromAustralia,ajtd F$ saceulate without narrow duct
twn new species of Incabates and the new genus Setincabates hypersetosus sp. nov.
together with one new species are described. Ten pairs of hysteronotal seta or alveoli. Hysteronotal
foramen F3 sacculnte with narrow duct incabates,
Material and Methods 2 Hysteronotalsetaerepresentedonlybyalveoli. Tutorium
absent , I makronudus »p. nov.
isNdeepwosmiatteedrimaolsetxlaymiinnetdheliSeoreu,tcholAluescttreadlbiyanthMeuaustehourm, 3. pSAritexsleeanpstotstoenreioprairsnotfalhtystheyrsotneortoanlotsaeltaeseptrae!senpta.i,r.T.u.p,t,ro.e.rs,ieun3mt.
(SAMA), but also in the Natural History Museum, {JS, 76; Z5, Z6; 55, 56). Anterior soma
London (BMNH), the Field Museum, Chicago punctate .,., ,... /. punctatus sp. nov.
(FMNH) andtheNewZealand ArthropodCollection. Oneposterior small hysteronotal setal pair present (76).
Land Care Research, Auckland (NZAC), whilst Anterior soma not punctate. /. angustus Hammer.
previously described material is deposited in the
Zoological Museum, Copenhagen (ZMC). The Systematic*
morphological nouuional system follows Lee (1987),
thesoma! chactotaxyofwhich is summarised inFigs Incabates Hammer
IncabatesHammer, 1961,p. 108(typespeciesbymonotypy:
IncabatesnudusHammer1961V:Coetzer, 1968.p.25;Balogb
* South Australian Museum, North Terrace. Adelaide, S. &Balogh, 1984.p.27-*;Luxtem, 1985,p. 67;Corpuz-Raros.
Ausi. 5000. 1980; 174.
Definition: Haplozctidae. RYSteronnturu with 10 thanafixedpicrouiorpuasinscheloribaadgenera, on
pairs(2/,GZ,X>)ofshortsetae, miciosetaeoralveoli the basis of which, Cnetter (1968) sugge&ted! that
withoutthairsetae. Hysteronotal foraminawithsaccule Incabates should be transfcrnsd to the Haplo/etidae
tag-lite, eithertaperinggraduallytoporeorwithshort Grandje*n, 1936. Because Incubate*alsohas3derived
narrow duct nearpore. Dorsosejugal furrow entire. trochanter IV (the disroventraJ crown with only an
TnmslameUa andprelaniella absent, costareorlineate anteriorlobethatextendsalongentireventerofcaput);
tttorium (between setae /K2) sometimes present. andiftherebalateral proteronotalridgeitisnhttnrruni
RostraJ acta(jl)directly infrontoflamellar seta 61). raihei than a prelamelta ridge, this grouping in the
Ptexoinorph movable, wiih clear Weakly sclerotized Haplozctidae is followed here.
basal line. DisckUuoi triangulate. Tibia I with large ha current classifications of the Gripodoidea. the
solenidium (*<£) on tubercle. Tibia H without HaplozctAidaeare tw*tcloselyalhedtothePtotoribaridae
distodorsal spur. Genu I Had widi two setae (v Balogh Balogh, 1984, because of die importance
absent).Trochanter IVusuallywithdistodocsalprocess given lo the former iarnily having derived sacculate
extended over fcmur IV (exception: hicabares hysieronotal foramina, rather than inultJporosc
cutjtustus), distodtffsal crown with only anterior foramina; out both Incubates and Protonbaies havt:
angulate lobe, broad flange extending along entire derived hinged pteromoTphs. The .significance of
venWofcaput. Pietarsuswith threeclaw?, slimmer particular character states and so the accepted
lateral claws with pointed tip, relationshipsamongst Dripodoidtaw,may wellchange-
GeneralMorptiologyofAustralian xpecies; Soma! considerably. Induspaperil isconsidered that, since
length range for Adults: 239-445 (for all species Incabates shares some character states with most
239-496). Soma! chaetotaxy: $, S& Is; 2./. 6Z, IS; genera of the more primitive Scheloribaudae
31 Iff, 3/ff,3/|5472£, Wfr; 2JZa. iSa. Legchaetotaxy Grandjean. 1933, character states dial are derived in
(sotcnidia"mparentheses); Im- 1,5.2<1>. 4(2),20(2); many membersofthe Hapkizetidae (thedisadium is
fl - 1, 5, 2(1).4a). 16(2); - 2, X 1(1), 3(1), 15; rectangulate, the tutorium \& conspicuously laminate
IV - 1.2.2, 3(1), 12, Alveoliofsoma!seiaebounded andhysteronotal sacculateforaminaoftenhavenarrow
by- refractue ring, canal short and tapering without ductsleadinglotheirpores), Uismoreprimitivethan
internal refractile ring. Pteromorph may he close to Magnobates Hammer. 1967 and the genera closely
&
pleuralsurfaceorbeliftedaway fromit, Sub-bothndiaJ allied to it (Lee Shepherd 1990).
flangepresent ApodemesI, 11, vcntrosejugalandIII Indiairiguisning Incabates fromothergenera, the
preterit, venirosejugal gap not wider than genital following schetoribatid genera must be considered:
orifice. Subpedai andcireurnpedal ridgesmerged into MutiercufaCoetzer, 1968, NanneriiaCocuer, 1968and
single continuous line. Sfit-like pore Saf nearly StyloribatesJacoc, 1934. These three genera can be
longitudinal (leas than 45° from longitudinal a.\is). regardedasderivedwithintheSctelntihoiJdaebecause
Prooumoventralspwon femur1 withoutcaputcollar. ofcharacterstatesoftheproteronotumandtrochanter
Conspicuousventral flanges on femora£1, HI. andIV, IV. lo general, members ofthe ScheloribaUdae fold
on femurD margin curved, not angulate. leg 3 agam*i the soma so that the tarsus noJnM
Distribution. Peru (NTc), Japan I.Fc) Philippines downwardsbehindsetajj,lyingbehind(bepreUroeQa
(Otn), Australia (Aa), NewZealand (Anr), Fiji (Ap) ridge, also trochanter IV is simple, with the crown
AllspeciesfromoutsideSouthAustraliaarefrommoist confinedtothedistal end, Incontrast,baplozettdsand
localities, often in moss, cither in high altitude the three seheloribatid genera listed above, have a
grasslandorin forestor mangroves,andaresometimes tutorium or subtutorium rather than a complete
arboreal, hi South Australia all three species were prel-rmeiln and, when the teg is folded, tarsus Ican
collected from the sclerophyU forestsite, which has pointforwardbetweensetae&jt,whilstontrochanter
the highest tainfall (annual mean in die range of IV,diecrownextendsasabroadflangealongtheentire
1150-1200 mrn, mostly in wknter), but Intubates venterofthecaput. Therefore,thesethree scheioribautl
punctams sp. nov. was also collected from the two genera are only distinguished from the hnplozefid
malleesiteswhicharedry (meanannualrainfallinthe Incabates by having fixed pteromorpfis, which is
range of 350-500 nun). M-.ioftimes adifftciillcharacterstaletoassess. Further
Remarks: Incabates was considered allied to1 studies may re>qulie that these four genera areeither
Pwtoribaus Berlesc. 1908 when it was established- groupedintoanew familyorthatthe Scheloribatldac
More recently it has been allied to Schelotibases and Haplozetidae are merged.
Berlese, 1408 (Corpuz-Raros 1980; Uxton 1985), to The naming ofa species, diatisvery similar to the
which it is similar in having atriangulate diseidium, typespeciesofMufierruki,asllncabateiiottgisaccubss
bysfieronotalsacculateforaminathat gradually taperto illustrates this confusion. It is here combined, as
apore, and, for somespecies, in having no tutorium, Mulierculahngisaccuta(Mahuiifca, 19&4)comb, nov.,
(inspecie*withatutonurn. Itonlycosuite) Incontrast, despite lis lack ofa tutorium and the presence ofa
Incabateshasaderivedcharacterstale, ahingedrather partial prclamellar. Thfcs is partly because these
fflCAttftBtANDSETTNCABiOTS, HAKjOZHTID MITES 79
chancierstales*revariableinJneabates,and [herefore seta 02) longer than distanceJ2 * zl Hysleronotum
the presence of a tutoriurn may not be diagnostic of withonlyonepair(J6)ofnoticeablesmall setae, nine
Mutiencula* but it is mainly because the pteromorph pairs(75,21-6.55and6)of<dveoli>possibly withsmall
isonlypartiallydelineated from (hehysteronotmuby microsctae. Alveolus 55 posterior to 25 (South
aclear furrow a* described for Muliercula, where il Australianspecimens)oranteriortoZ5 (NewZealand
isregarded asfixed,althoughambiguouslydescribed specimens). Foramen F3 conspicuously larger and
by Cuetzer (1968) a* "pteromorphae immovably sometimes sacculus bilubed (South Australian
hinged" Becauseofthe similaritybetween Incaboxex specimens) or slightly larger, not bdobed (New
and Mntiercuta despite their grouping in separate Zealand specimens).
t
families, only themoreextensivewing-likeexpansions Idiostemal setae tine and short, coxiteseta/3, #73
ofthe lamellaeofM. longisaccula and itsoccurrence and/K3 (not illu«traied aspresent by Hammer. 1967*
in Africa support the new grouping. Fig. SJh) longest. Integument smooth except lor
In comparison to other haplozeud genera such as indistinctreticulationsaround veotrosejuga!apodeme
Hapk&m
VVUUnann. t935andMannobatesHammer, and apodeme HI. Discidium height less than CX5x
1967, Incabates is regarded as primitive kn having a heightofpedoteetumIT, coxiteseta/W>i»eardiscidhim
triangulate disctdium, as on oribatuUd and base. Eggs subellipsotdal, eaochorion smooth, mean
scheloriharid adults. Similarly it has only two setae size 15! x 72 (n = 7), length A%% orsornaj lengdi.
on genu I Rod the alveolar canal ofthe soma! setae eggs per female - I (n * 3), or 2 (n = 2).
is short and simple. Legs short (median fermir-tarsus length: 40% of
facabates includes seven species: t angustus soma! Icugthj with stoutgirth (mean maximum tibial
Hammer, 1967 (= I mediusHammer, 1971, syn, nov.) height 50% ofmean length). Trochanter IV anterior
fromAustralia(Aa), NewZealand {An)and Fiji(Ap); margin parallelsposteriormarginoffemurIV caput,
/. macronudussp- nov. from Australia (Aa), /. major angulate distodorsalry but without process extended
Aoki, 1970fromJapan (r\:); L nodus Hammer, 1961 over femur IV.
from Peru (NTc) and Philippines<Om); I pahabatus Male:Similartofemalebut idiosomashorter,mean
Corpus-Rams, 19S0. from Philippines (Otn); /. length, 293 (7,Sclemphyil forest, 283-303)or319(3,
puncsatus sp. nov. from Australia <Aa)>- / xtriatus Savannah woodland)
—
Corpu2-Raros, 1980, From Philippines (Om). Refined material: 12 females (SAMA N1991I
N199II2), seven males (SAMA N199U3 - NI99119),
Intubates angustus Hammer plani litter, sparse moss and .sandy soil, under
sclerophyllous shrub amongst messmate strtngybark
fncabasesau^ustus Hammer 1967. p. 43, 44, Fig. 57, 5fo. {Eucalyptus abiiqua), dry scleropbyll forest, near
fooifeitomediusHammer, 1971,p.42, Fig, 4*k.43a, syn. no» summit of Mt Lofty (34°59fS, U&^S'E), Cleiand
Conservation Park, 9.V.1974.
'f\pr materia!examined I angustus, lectorype Q Onemale(SAMA N199120),grass, nwss, plantlitter
(labelled "type* ui vial of alcohol, three specimens and loamy soil, under raaruia guro trees {Eucalyptus
recorded in original description) examined (ZMC), •dmnatis), savannah woodland, Chambers Gully
liverworts and small ferns, dead tree trunks native (34»58JS, 138WE), Cicland Conservation Park,
forest, WaUakere National fttfk. North Island, New 12.vi.1974.
Zealand, M. Hammer, 1962. / medius, lectnrype Q Remarks:Incubatesangioma-wasoneof(burspecies
(labelled type in veal of alcohol, two specimens that have only a xingle pair ofbysteronortal seta (76),
recorded in original description) examined (ZMC), butoneoftheotherthreespecies, /. mediusfromFiji,
Withered leaves, river bank above mangroves, is here synonymised with it. The other two specie*,
Cocolevu, Vila Levu, FijiIslands, M. Hammer, 1961. /. xtruttut with a striated integumen* and (he stouter
Female: Soma oval, brown. Idiosomaf length /. nodus with a much broader lamella, are easily
(original description from New Zealand; ^abow distinguishable as separate species The slim /.
035 mitf. from Fiji, about GV305 rnnaf), 335 (n * 1, anguxtusand r*. mediusare verysimilar withthenew
New Zealand) or 318 (n * 25. ScleropbyD forest. material from South Australia having intermediate
306-332). Leg lengths (femut-larsus, Sclemphyil character states, /. angustus is 350 (tttl long, has
forest, for 520): 1-142, D-127, IU-I0S. IY-137. TOwal hv^eronotalseta56anteriortoS5anddieinterlamellar
maximumheights(for320): 1-22, 1M7, UM4, IV-14. setafjl) isabout0i75x thelengthofthelamellar seta
Proteronoturn with mediu/u width rostrum, &1). L medius is 305 urn long, has hysteronotal seta
integument smooth. Tutoriurn present, sometimes S6 level with £5 and the interlamellar seta is about
indistinctlevel withlamellarsetat>il. Sensaryseta{&) 0.5x the length ofthe lamellar seta. The spccin>ens
with globular caput longer than exposed stalk. Sub- from South Australiaatesimilarin size to /, n^dius*
HeRbridial flange inconspicuous. r\wtcri©r margin of have seta S6posteriorto 55, and the relative sizes of
bothridiumraisedtoformtooth-likespur. InterlameHar the interlamellarand lamellarsetseajeas/. anguvias.
D. C LEE
Fig. 1. Incubates macronudus sp. nov., female soma, notum.
INCABATES AND SETINCABATES. HAPLOZETID MITES
SI
These differences are here regarded as intraspecific amongstmessmatestringybark(Eucalyptusobliqua),
variationswithinaspeciesdistributedacrossAustralia, dry sclerophyll forest, near summit of Mt Lofty
New Zealand and Fiji, and comparable with (34°59'S, 138°45'E), Cleland Conservation Park,
differences within /. nudus from Peru and the 9.V.1974.
Philippines (Corpus-Raros 1980). Female: Somaoblong, brown. Idiosomal length 446
(n - 1). Leg lengths (femur-tarsus for 446): 1-178,
Incabates macronudus sp. nov. 11-163, 111-142, IV-166. Tibial maximum heights (for
HH4
446): 1-22, 11-17, IV-14.
t
Type material Proteronotum with narrow rostrum. Integument
HoLotype female (SAMA N199121), plant litter, smooth. Sublamella obscured in dorsal aspect by
sparsemossandsandysoil, undersclerophyllousshrub laminar lamella. Tutorium absent. Sensory seta (z2)
3
lOCUim
Figs. 2, 3. Incabatespunctatus sp. nov., female soma. 2, notum; 3, idiosternum
82 D. C. LEE
4
Fig. 4.Incabatespunctatussp. nov., female rightlegsI-IV, femur-pretarsus, alsotrochanterIV, posterioraspect. Onlytwo
setae illustrated (v = ventral).
clavate(caputmayappearglobularifviewedendon), subellipsoidal, exochorion smooth, mean size 166 x
caput subequal in length to exposed stalk. Sub- 70 (n 4), length 42% ofsomal length, four eggs
bothridial flange conspicuous. Posterior margin of in single female.
bothridiumraisedto formtooth-likespur. Interlamellar Legs short (median femur-tarsus length: 36% of
seta (j2)longerthandistancej^-zL Hysteronotumwith somal length) withstout(meanmaximumtibialheight
noobvious setae. Alveoli form clear refractile rings, 39% ofmeanlength). TrochanterIVwithbluntprocess
microsetarecognisedin22, may bepresentelsewhere. on angulatc distodorsal margin which extends over
ExtraalveolusbetweenZ2 and23 on right side only. femur IV.
Foraminawithconspicuouslyrefractilesaccule,F3oval Remarks'. ThenamemacronudusisfromtheGreek
and larger than other saccules. forlarge*andtheLatinfor"naked*andrefersto itsbody
Idiosternal setaefineandshort, setaeB andSal the size and the absence of recognisable setae on the
longest, setae ITJ3 and IV3 not located. Integument hysteronotum. /. macronudusistheonlyspeciesknown
smooth except for indistinct reticulations around inIncabateswithnoeasilyobservablehysteronotalseta
ventrosejugal apodemeandapodemeIE. Genital seta (/. nudushasonepair)andwith/. majorithasasomal
JZgl midway between JZgl and JZgl, rather than lengthgreaterthan440jim. Becausethereisonlyone
closertoJZgl. Discidiumheightlessthan0.5x height specimen, itwasnotdissected,whichmayexplain why
of pedotectum 11, coxite seta IV3 not located. Egg somecoxitesetae(IIB and7K3)havenotbeenlocated.
INC4B4TESAND SETlNCABArtS, HAPLOZETID MITES gj
iacakats punctata* sp- nov. biVtteri).Taraboore Homestead(35*57'& U0°29'£),
or Mt Rescue Conservation ftirk, 4,viL1974.
Type materiui Tnree males (SAMA N199T71 - N199173), soil,
Types: Holalype female (SAMA N19&7645), soil, plant litter and sparse grass under coastal wattle
plantUtterand sparsemossunderridge-fruited mariee tAcacia wpberoe), Ptccanitinie ftinds Conservation
(Ettcalyptus tnerossata) clamps amongst broomhusb Park <38°03'S, 140°S7'E» lvli.1974.
shrub* (Melaleuca uncinata), Ferries-MeDotiald Three females (SAMA N1I99166 - M99K81, two
Conservation Park <35°15'S, I39WE), 20vU974. males (SAMA N199169, N199170). plant litter, sparse
Paratypes,45females(SAMA N19S7646 -N1987654. moss and sandy soil, under sclerophyllnu* shnib
N199122 - N199J42, five - BMNH, five - FMNH, amongstmessmatestringybark {Eucaiyprusobliqua),
fiv* - NZAC) and 55 mates (SAMA N1987655 - dry scleiophyl! forest, near xurmxtii of Mt Lofty
N198T67I, N199143 - N199165, five - QMNH, five (34°59rS, 138^45*E), Cleland Conservation Park.
- FMNH, five - NZAC>, as holotypc. 9v.1974.
Female: Soma ova), brown. Idiosouial length 259 Remarks. Thenamepunctatusi* fromtheLatinfor
(n = 2ft Malletbroombush, 249-267),257 (n = 2, 'dotted*andreferstowhatmaybesmallpitscmanterior
Maitoc heath, 256c 258) or 250 (n = 3, Sclerophyll parts ofthe soma, which ate more extensive than in
forest* 252-267), Leg lengths (fermi-tarsus, Mallee other species. Also ' punctatus isuniquewithin the
bnxanbuih. fix262): 1*113, 11-98,IEI-82. IV-105. Tibial genus mlackingfouranteriorpairsofhysreronotal setae
maximumheights(for262): I-I6.5,IW3> IH1 S>IV43. (mJcrosetae may be present), whilst the posteriorsix
Proteronmum with medium breadth rostrum. pairs have small setae, that are relatively Long for
Integument punctate anrerior to setaJl, Sublamella incabates.IpahabaeusCorpus-Raros. 1980issimilar
mainlyobscured indorsal aspectby laminarlamella. butwithoutsuchacleardifferenceinsizebetweenthe
CosUle tutortum present Sensory seta f.-2) clavate, two groups of aefiae. Also, on /. pahafaieus* the
caput subequal In length to exposed stalk. Sub- tntertamellarsetaearemuchlongerandthebystetorxMal
bothridial flange conspicuous. Posterior margin of slit-shapedporehfiisshortand noras. Inngas seta/&
bothridiiumraisedtoforrosmall singleordoubletooth-
likespur. Inlerlamellarseta(/2) shorterthandistance Getlus Setincabotes gen. nuv.
fl-zl. Hysteranotum witJiout obvious setaeanteriorly
(Zl. Z2»-23,24)butmicroseiaerecognised for21 and Type-species. Serincabates hypersetmus sp. nov,
22. whilst posterior small setae {/5, /6, Z5, 2& 55, Definition: Haplozetidae. Hysteronotum with 13
56) present. Integument punctate anterior to pairs (4J 6Z, 3S) of modium-sizcd setose setae.
t
ptcromorphs. Foraminawith conspicuous])' retractile Hysterunotalfotarninawithsacculebag-like, gradually
saccule, F3 spherical and target thanother saccules. tapering to pore. Dorsosejugal furrow entire.
Idiostcrnal setae fine and short, variable relative TranslameHa, r^lamcUaandmisofUiiJiahsenL Rostral
m
lengths, but/A, IIfl,JZg3alwaysshortest. Integument seta </l) dirocLly front of lamellar seta Ut).
with indistinct reticulate sculpturing and punctate in Pteromorph movable, with clear weakly sderou/ed
cnxistemal region- Genital seta JZg2 closer to JZgl basal line. Discidium triangulate. Tibia I widi large
dtanJZg3. Dtsc'tdiumheight more than 0.5x height solenidiurn (so2) on tubercle. Ttbia tl without
ofpedotecturnil, coxiteseta/V3levelwith, anddo&e disTodorsa! spur. Genu 1 and II with two setae (v
toapex. I*ggsubellipsoidaJ» exochorion smooth, mean absent), Trochanter IV with distadorsal process
siae132 x 64<n = 13). length49% ofsoma! length, extendedoverfemur IV, distodorsal crownwith only
usuallyoneeggperfemale(n - 14), twoeggs msingle anterior angulale lobe, broad flange extending along
female. entire venter of caput. Prciarmus wim three claws,
Legs short (median fenvur-Carsus length: 38% oi slimmer laieral claws with pointed tip.
soma! length) with very stout girth (mean maximum Distribution; Australia(Aa). Otkly rcconJ tramSoutti
tibialheight51% ofmeanlength). TrochanterlV with .Australia, ai *ite which amongstthosesampledhasme
sharp process on anguiate distodorsal margin which highest rainrail,
extends oveT femur JV. Remarks: ThenameSetincabaseshastheprefix S*r»
Male: Similai tofemalebut idiosouialshorter, mean an abbre\iatiou ofthe Latin seta for 'bnstle or hair'.
length, 239(25, Malicebroombush, 226-252),249 (5, and refers to rhe presenceofmorehysteronotai setae
MalJe*heath.238-250).251 (3, Coastal, 25G-253)or onthesingleincluded speciesthanonmembersofthe
247 (3> Scleropbyll fowl, 244-252). similar tncabacs and other baploaerine genera with
Referredmaterial: Threefemales(SAMA N19S7672. short or medium-sized setae. The HaploKetine
NW174, N199175)and five males(SAMA N199176 - FlagetlubatesMahunka, 1973 with long hystctonotal
N199180), sand, plant litter, under Wanksia shrubs setae has 14 pairs ofhysteroootal setae. Some other
{Banktiaomata), amongstothersclerophyllousshrubs subfamilies included in HapIoaretLdae by Batogh &
and sparse brown stnngybatk malice {Eut-ulypiux Balogb <19S4> have similarly numerous hysteronotai
K4 D. C LEE
setae. MembersofthePeloribatinae, allofwhichhave Male: Similartofemalebutidiosomashorter, mean
long hysteronotal setae, have either 14 pairs or, in length, 239 (21, 244-285).
Aeutvzetes Balogh, 1970. 13pairsofhysteronotalsetae Remarks: The name hypersetosus is the Latin for
(possessingsixnotfivesetae in fileJ). Theonly other 'bristly* or 'setose' with the Greek prefix for 'beyond'
haplozetid species with more than 10 pairs of or 'over* and refers to the unusually extensive
hysteronotalsetaearemembersofthePilobatesBalogh, hysteronotalsetationcomparedwithmembersofgenera
1960(Pilobatinae)with 14pairsandsixpairsofgenital similar to Setincabates.
setaeand astraight,transversecompleteventrosejugal
apodemeandonespeciesofRostrozem Sellnick, 1925
(Rostrozetinae) with 14 pairs and a short fissure-like
porehft similarinlengthtothehysteronotal foramina.
The character states ofSetincabates recognised here
as distinguishing it from tncabates are probably
primitive.
Setincabates hypersetoxus sp. nov.
Type material
Types: Holotypc female (SAMA NI99181), plant
litter* sparse mossand sandy soil, undersclerophyllous
shrub amongst messmate stringybark {Eucalyptus
obliqua), dry sclerophyll forest, near summit of Mt
Lofty (34°59'S, D8°45TE), ClelandConservationPark-.
9N.1V0.91917G46.; Ptawroaty-pesBsM2N1Hf,emtalweos -(SFAMMNHN1,991t8w2o -
NZAC)and21 males(SAMN199197 - N199UU,two
BMNH,two - FMNH, two - NZAC),asholotype.
Female: Soma oval, brown. Idiosomal length 264
<22> 254-275). Leg lengths (femur-tarsus for 267):
1-122, IM04, 111-86, IV-110. Tibial maximum heights
(for 267): 1-19, II 13, ffl-13, IV-14.
Proteronolum with broad rostrum. Integument
smooth except for punctuations on gnaihosternum
between postoral setae. Sublamella mainly obscured
in dorsal aspect by laminar lamella. Tutorium not
present, although short ridge present around base of
rostralsetae (/l). Sensory seta (s2)clavate, with long
ellipsoidal caput more than twice length ofexposed
stalk. Sub-bothridial flange conspicuous. Posterior
marginofbothndium roundedwithouttooth-lite spur.
Imerlamellar seta (J2) about x2 distance j2-z\.
Hysteronotumwith 14pairsofsmallsetae(5J, 6Z,35).
Foramina with small oval refractile saccule without
parallel sided duct, all similar in size.
Idiosternal setae fine and short, peripheral setae
longer, UandJZablongest. Integumentwith indistinct
reticulatesculpturingincoxisternalregion. Genital seta
JZglclosertoJZg\ thanJZg3. Discidiumheightless
than€.5 x heightofrjedotectumII, coxiteseta/K3 near,
butposteriortoapex, Eggsubellipsoidal, exochorion
smooth, mean size 132 x 65 (n = 4), length 49%
ofsomal length, one egg per female.
Legs short (median femur-tarsus length: 40% of
socnal length) withvery short girth (mean maximum
tibial height54%ofmeanlength). TrochanterIV with
short sharp process on angulate distodorsal margin Fig. 5. Setincabates hypersetosus gen, A. sp. nov., female
whichjust extends over femurIV. soma, notum.
.
INCABATES AND SETINCARXTES, HAPLOZET1D MITES 85
Acknowledgements
I am indebted to Ms C. M. Birchby for the Dr Henrick Enghoff (Zoological Museum,
illustrationsandtotheAustralianBiologicalResources Copenhagen) formaking types available, andMrsD,
Study for funding her salary. Thanks are also due to Lowery for typing the manuscript.
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