Chitinozoa from the Ordovician conglomerates at Międzygórz in the Holy Cross Mts

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Vol. 24, No. 1

ROMAN CIl'I.J!}BOWSKI & atJBERT SZANIAWSKI

acta leoioglca polonica

Warszawa 1974

Chitinozoa from the Ordovician conglomerates at Mi~dz9g6rz in the Holy Cross Mts

ABST'R.AJCT: The abundan't Cbitinozoa were fOW'lJd in clayey shale fragment-a, one af fue oom·ponents of a Lower Ordoviclan conglomerate, occurring at ·M!I.~y.g6rz

near Opat6w In the Holy Cross Mts. ThIs oOOnglomerate has hitherto been considered as 'fi"emadocian. Here occurring &pec~, Desmochfltioo miflO'l' Eisenack, Lagenochittna d. esthontca EisecaCk: and Rhabdoohitifla maana E1senack, .indicate a younger age, probably :Arenigdan. A. new species Of the Chltlnozoa, ViIrz. C1/athochUina primitiva

Bp. Ill., has also been established.

nrnRODUCTION

An Ordovician profile

with

a conglomeratic series·

in

its bottom part is exposed at

Mi~g6rz,

a locality situated between Opat6w and Sando- mierz in the eastern part of the Holy Cross Mts. The . entire area of this region is overlaid by a thick cover of loess, from below which fragmentary Pa1eozoic deposits are exposed.

in

deeply cut ravines (Fig.

1).

The conglomeratic series under study :bas for many years now been known in literature (Zejszner

_1869;

Siemiradzki

1903, 1922;

Samsonowicz

1916, 1928; Tomczy.~ 1954;

Blaszke

1957;

Turnau-Morawska

_1960;

Bednar- czyk

1964, 1966, 1971).

The ·age of these deposits has recently been deter- mined by W. Bedn' arczyk

(1964, 1966, 1971)

as Upper Tremadocian, since they underlie the Arenigian sandstones.

The present writers have dealt with fragments of clayey shales, one

of

the components of the polymictic conglomerate. These are fragments

(0.5-4.0 cm in size) of black or gray-greenish shales, brittle or somewhat

plastic and with common muscovite flakes. Many Chitinozoa were sepa-

rated from these shales, when dissolved in hydrofluoric acid.

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R0MAN ,CHLl!lBOWlSKI &. HUBERT SZANIAWSKI

Fig. 1

Oootln'en<:e of the O.rdoviclan depos:lta (marked black) in the Holy Cross Mm; sim- pJdJfied from Czamociti (1953) and Tunczyirowa (1968)

SYS'l1mMIA'rnC DmSOBlIP,TION OF QH:ITLN'OZOA (by

H.

Szaniawski)

The Chitinoz<>a represent a group of microfossils occurring in the Ordovician, Silurian and Devonian marine deposits. These fossils have been described in paleontological literature only since 1931 (Eisenack 1931) and their syStematic position remains unknown. According to KOZ'lowski (1963), in all likelihood. these are cysts, eggs or egg capgu!l.es

of

invertebTates. The possibility of an extensive application of the ChiU- nozoa

in

stratigraphy has recently been shown by many

aUthor~ (e.g.

Taugordeau & Jekhovs'ky 1960; Eisenack 1962b, 1968; Jenkins 1967, 1969, 1970; Laufe1d 1967; Umnt}va 1969;

Manni~

1971). For, it turned out that the Chitinozoa were strongly differentiated (more than 500 species are

krwwn at present) and subject to rapidevolumon. Most of the species have

a very extensive geographical distribution and some

.

of them a narrow stratigraphic range. However, their practica'l use in stratigraphy is at present rather

·llinited because of

a relatively few materiai from continuous pofiIes sufficiently documented by index fauna. In Poland, apart of Kozlowski's paper (1983) on biological problems of the Chitinozoa, they were Qnay the sulbject of a graduated paper (MaszOllska 1971).

Except for the la,tter, they have never been described or used for stratigraphic purposes.

The collection under study consisls of over 200 specimens belonging

to four species of four genera. All the specimens

(cf.

PIs 1-2) are more

or less flattened. 'but well-preserved. The collection is housed at the Insti-

tute of Paleozoology of the Polish Acatlemy of Sciences in Warsaw.

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OBDC)'i7IOI.A.N CRl'l'INOZOA FROM THE HOLY CROSS MT8

Genus CY

ATHOCHITINA

Eisenack, 1955

"pe

speci:es: Cyathochitina campanulaejormis (Eisenack, 1931) Cyathochitina primitiva sp; n.

(PI. 1, Figs 1-7, PI. 2, Figs 11-12)

Hmotype: a ~n oompoIIed CIf two connected telltll (Z. Pal. No. Ch. Ill), preaeUed.

In PI. 1, lNg. 11.

Type horizon: Lower OrdDvdc1an.

Type tocultty: Mi&:dzyg6rE In the Holy 0r0IJB Mts.

Derl11aUon of the nome: tLat1n prlmitiuua - orlgl.oa1, 88 it is the earliest species of.

Cyathochttina k.Down 80 fBlr aIId ~ by a very BlUliPle b"m.

~. - Test a-elatl.ve1y wide, cyldndrooani<:al. The length of chamber- equalling about 'two-thirds of the total length of test and the w1dth of 'Chamber equ- al.l.izlg iJts leIlgtlh.. IBa&e dilaIt, .iJ1I! edge :in Ithe .fu1m leAf a ruwrow dm.. iNeck ondy sltlghtlly dffiferen1llla/tJeld !from IIbe cbamber, very 'WIide .and :flatrdlDg. The 'CIiiIameIt.er of apetrlu.re samewbeJt EmafILer li!han 1lbat df' base.

Material.. - A:boot 1150 sJ%lgle tests and tbree composed of two tests each.

Description. - The specimens occur in the form of single 1lests and chains.

ParticUlar tes'hll vary m length from. 2.18

to

359 ... Chamber 0CJ0Ilical to cylindrlical, its length equaIlli.ng 0.6 to 0.7 of the total length cl test. Its maxim·um dd.ameta:,.

mea'Sured at the base, !Squalls 1).8 to 1..2 oQIf its length. Chamber very Wiide over tills- enUre length. Flanks of most specimens tapering Vf'!rY sl.ighltly. Base flat, with con- oe!l1trk .llnes barely discernd.bLe. An a.ttacbment scar (a result of JoInirIg the chain}

in the [ornn of a long~udinaa Iflm'lrOW is visible dn m1l6t specimens. /Basal edge prov:ided w:iJIlh 8> 1l(.U:'.roIW, buIt a:e1abive1y 'hbdIc!k !t'!lm. Neck, &Ug:hitly ddMetrIend;Iatad frkm IfIbe ~, Ii6 IIIboIl't, V'$Y wtie and :fII.atrIirIg, rlI1B widIlb. ~ 0.65 rID 0.76:

of maximum diameter at i;Jm narrowest _paintand 0.77

to

0.93 of maximum diameter at II:!perrture. An impression left by the basal sur.face Of oanother test next in chain.

(Pl. 1, :Fdig. 4bp js pt'e6el'ved IiJn, same speciImens neat' aperture. Tst WaJ1J.

ISmOIO!Iih.

lustrous.

Comparison and remarks. - The new spec:1es differs from all typical repre- senta·tivea of Cyathomitina in a more cyUndmoal cbamber, sllghtly dWerentll9:ted,.

very wide neck and the lack 0If carina proper. lMost likely, those are primittve -cha- racters df the genus. Somewhat sbn.ilar cheraders are displayed by C1IfJthochiti114 r~li Eisenack whiich is IIIllso one Of the stratigraphdcally oldest i([Jower

Llanm-·

man) 'S·pecies of the genus. The new species differs .from it in a mOl'le cyUnddcal chamber and considerablY larger test.

Genus

DESMOCHITINA

Eisenack, 1931 Type species: Desmochitina nodosa Eisenack, 1931

Desmochitina minor Eisenack, 1931 (PI. 2, Figs

~9)

1931. D.esmochitina? m4nor .0. lIP.; EJIIEmBC'k, p. 83, PI. S, FiIgs 9-l!1.

1l1li8. DeamochUt.na _mtnorforma typlxla J!)isenaok; Elsene.ok p. 898, PI. 2, I'i.g. 29.

1963. DesmocMttM minor El8enackj ~, p. _ . ~ 1-4.

1968. Desmoch£tina minor forma typtcu DeIJalClk; EiJlenlllCk, p. 180, Pt 24, Flog. 11..

1988. Desmochtttna synanymy). _mf.norJ!lI8eInaokj Jemk1ns, IP. 20, :N. 6, F4gs 1-18 (here remailned an earll"

19611. Desmoc~a minor tfl'Ploca Elsenadk; Umllova, Pl. 2, Figs 1-.3.

1968. Desmochtttna mtnoT grandtcoUa l!l!senads;; UIIlIDOva. Pt 2, F!gs ~.

19'10. Dtl&mochitf.na mlinor EiIIeIn;a.ok; JeoId.Ds, p. Z'nI, Pt 50. . Figs 10, 111-1'7.

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ROMAN CHLEBOWSKI '" HUBERT BZAl'fIA WBKI

McteriaZ. - F:IIfty~e single tests I8!ld four chains consisting of two to three tests· eadl. On~ of the specimens (pI. 2, Fig. 10), considerably larger (220 p) and mare elongate,· h86 been identified as Desmochttina elf. minor Eisenack.

Renuztrks. - Eight informal intraspeclflc taxons were distinguished within the species Desmochftina m.irnor by Elsenaek (1958, 1962a): The Ordovician specimens from Mi~dzyg6rz rare most cl()Sely related "Ix> Desmochitina minor farma tllpica Eise- .naC'k, 1'1168, ·considered Iby other authors {Laufeld 1967; Jenldns 1969, 1'9'10; and the present writer) as a separate species. The specimens

«001.

Mi~dzyg6rz, considerably larger than so fiar known representatives of this species, ·di!ffer only ·in size. The dimensions Qf five specimens from glauoonite limestones (~) from Estonla, as glven by Eisenaclt 01(68), are as follOWS: length from 84 to 1016 l' and maximum diemeter trom 5'1 to 59 p. The largest spedmens, described by Jenkins (1970) from the Upper OrdoWoian at. Oklahoma au 1120 " long and 86 " wide. On the basis of collections from various Ol"dovician horizons of Poland, x,ozrowski (1963) maintains that typical .specimens are. 1'35 l' m'length rand .120 " in maximum diameter. The' SpeCimEns' from Mi~dzY'g6rz are 125

to

180" long and U5

to

\la5 " J::n maximum diameter. According

to

^EiBenack:rUiM!e), 1he size of D. minoT forma typica is verlaible, larger forms being usually met wti.th in the Lower rather than Upper Ordovician. Since the morpholo- gical details and Size proportiDns of particuiLar elements of the Mi~zyg6rz specimens 9·lmost do not diflfer at all fIrom those od' eithec the !Ileotype 'OCf D. minor (cf.

Eisenack 1lQ5'8, 1962a),

or

most (jf

so

far described representatives of ·this species {BeMU 8tTicto), the present writer believes tha:t the difierences in size here discussed .cannot prov.ide. a basds for excluding the specimens available from the 'Species under study. In reg.a.rd ·to dilnetl8loo6, the spooiments from Mi~z~6l'!l: are conformable with those dlrom glauronite limestones (~) of Estonia, described by Eisenack (:1958) as DeBmOChitma minor forma' gnmdiclO1Za Eisenack, from which they differ, however, in acons.iderably narrower aperture and shorter colarette.

Occwrrence. - This species, very common. in the Ordovician, is usually abun- dantly represented and has an extensive stratigraphic range. According

to

Eisenack (109(8), in the Baltic province it occurs from the Upper Aremgian glauooo.i.te Limestones

(~) to the Upper .A5hgiWan. &According

to

Umnova (J969), in the Moscow Synclise it appeaJrs only in the uppe!rmost pa.r·t of the Kooda stage, that is, in the Lower Llanvirnian (Ba). However, the occurrence of this species in the Upper Are.nigian was alSo found in Belgium {Martin 196'9).

Genus LAGENOCHITIN A Eisenack, 1931 Type species: Lagenochitina baltica EiBenack, '1931

Lagenochitina cf. esthonica Eisenack, 1955 (PI. 2, Fig. 4)

Material. -: Two incomPlete spec:imens.

Remarks. -, The two specimens may be only tentatively identf£ied, since they lack the distal part of neck, which, in the species Lagenochittna. esrth()l1l.ica, has a very charactedstic oolarette. In it'egard to shape, the Mi~dzyg6rz specimens are moot similar to some of those from. the Lower Llanvimian ·of England '(Jenlkins 1967, PI.

74, ~. 4), while

an

size they are COIllformrable with those of the Upper Aren.igiail {B₂₎of Estonia, whieh, acoordingto Eisenaek (1955) are 400 to 660 .... loog. The incomplete epecimen from M:i~zyg6rz, shown :in Pll. 2, Fig. 4, is 400 .... long. Specimens from the lower LlanNirnian of Sweden and England are oonalderably larger, their le.ngth f1.ucluatLng between 650 and 1,360 " (Ei.senack 1955, 1968; Jenldns 1967). The

M!i~dzyg6rz specimens, somewhat similar

to

LaQenochUff14 baltica Eisenack, 1931, dLMer however ina stronge;r· elongation and oo·nsiderably larger dimen1ilons.

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ORDOVICIAN ClllTINOZOA !'ROM 'lIHE HOLY CROSS l\nIS

OCCU1'rence. - The stratigraphic range of the species i'8 .rehlUvely na;rrow. It was descrlbed by Eisenack ,1965, 1968) from glaueooite lim~tones of the Upper Arelligian (~ of J!:sotonia and flrom the ILower IJlanvimian of Sweden. Its OCQUr-

rence was also !f,o\llld by Mannil '(1971) in the Upper .Arenlgian (B₂₎and Lower Llan- vimian 0If Northern Eetom:a and in the Lower IJ.anvirnian of the Moscow Synclise.

Jenkfns (1967) dESCribed this species f;rom the Lower (?) Llanviroian of England.:

Genus RHABDOCHITINA Eisenack, 1931 Type species: Rhabdochitina magna Eisenack, 1931

Rhabdochitina magna Eisenack, 1931 (PI. 3, Figs 1-3)

191i1l. Rhabd0chUtft4 magna Il. lip.; ElIIeaadI:, p. 80, PI. 3, Ftp l&-lB, Te%t-t>lgs 3-5.

i961. RhabdDchUMla tnnICata 11. BP.; Ta\JgoIdeau, p. ID1,"PL B, Figa '18-411.

11N15. lUiabdDchtcina magna Eilatmaak; Eaenack. p. lZ'1. PI. 10. 1'11. 10.

19f1'1. ,RhabdochtHna mai1'n4 El8enaek; Jenldln8. p. _ . 1'1. 'N. rillS 8. g...,}0. 12.

19111. Rhabd.ochU4.na ma/19Ul El8enack; El.senaclt. po'li1'1. PIL-3II;' 'FIg. 1.' 1988. RhabdlochlHna magna Elaenack; UDIfDOVa,. PL 1, Figs 1...l1.

1989. Rhabdochutna gantca~ Taugo.:deau; UImnova. PI. 1.

F.

^~

MateritU. :-Fiv~ specimens. including only one ,complete.

Re'TTKLrkB. - The oroovician specimens from Mi~yg6rz diffe;r from typical representatives of R.magna from' the Baltic province' (Ei8enack 1931, 1962a, 1'965) in a flI1:J:oDger ocm1lrac1li0ll of 1be baaal tpaI11t aIDd com:pI¥ratiw:ly ilairgerwdldibh. mise- nack (1Di62a) mairitains

that

the leng~h O!f, the s'peclmens flrom 'Baltic limestones vades. ~ 6'14 ,to, 1,35() .... and width ifromBO

to

.i13 .... wbile the ooly damplete specknen from Mi~zyg6rz is 11.,126 '" long an,d 146 JIo wi<le. A yet larger width in rela- tion

:to

IIIeilgtb :is ~ by ~ descr.ibed by

JenIOOs

~1967) from the IJLaIl- delHan of England w:h06e leng.th Uilctuates between 750 and 009 .... and width between 110 and .142 JIo. In regard

totbe

oontraction at the base, the M:1Qdzyg6rz specimens are 'Similar

to

.forms Oeaorilbed by Taugu-deau (liI61) under the name, R. truncata.

Acoordlng

to

the last-named author, these forms dilffer !from R. fl'l.aDIRa in a C'Onsl- derably larger elongation. In fact, the dimensions of flhe specimens described by '.Da-ugo;rdeau (1961) and their length-to-width utio are, however, W'ithl.n the range of variability of R. m.aQna, given by ~e!lack (1962a). The species R. magna ·is now

\lllderstood very broadly and it is mostllkely to be divided in the future inoo several subspecieso;r even separate species.

OCCUTrence. - Acotrding

to

Eisenack (3.988), in the Baltie province, typk:al

:b'ms

of ot!Ws spec:I.es occur .in

t1be

lJipper Ordovmiah (Ft eDd F2)

may.

^but

otbei-,

similar forms may be found u early as beginning with the Upper JUenigian glaucon1te lim-tJ!ItoIne (~).'lbe IOiOOUilTErnce

at

R. '1IU1gt'1a Wn 1he UplPE4" h£rog:ian and Uanvimlian of the

Moscow

Synclise was found

by

Umnova (1969). The form, .identified by this author as R. {1QIIiUca. Taugordeau (cf. synonymy) and whicb, in the present writers' opinioo., al1!9 belongs /to R'. ~ OCCllirS in

that

^~egion^t8Sea;r Iy as the I.Pwier Arenigian. This species was also' descri'bed by Jenkins ;from the Llanvirnian and IJandellian of England.

STRATIGR:A:PHIC CONCLUSIONS

The assemblage of the Chitmozoa, occurring

in

the shales of con- glomeratic series at

Mi~zyg6rz,

is composed

of

relatiwly I8rge, smooth- -walled forms

devoi~

of ornamentation and all kinds appendages. Such

16

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ROMA·N CHLEBOWBKI ... HtT.8ERT SZANIAWBKI

forms are typical of the Lower Ordovician. On the basis of

^'80

far known stratigraphic ranges of here occurring species, the age of the clayey sha- les should be estimated most likely as Upper Aremgian or Lower Lian- virnian. The situation of the conglomerates with fragments of shales in the profile overlaid

by

Orthis sandstones of Upper Arenigian age

(cf.

Bed- narczyk 1971) would, therefore, be indicative of the Arenigian age

of

both the clayey shales and conglomerates formed by the reworking of these shales. These conclusions, which are in conformity with those drawn by J. ZnoSko and R. Chlebowski (1974), should, however, be still treated very cautiously, since the Chitinozoa have not so far been studied in detail and the stratigraphic ranges

of

here occurring species may turn out to be more extensive. Although the genera Desmochitina Eisenack, Cyatho.

chitina Eisenack and Rhabdochitina Eisenack are very common in the Ordovician deposits and their occurrence has so far been never recorded below the Upper Arenigian, the fact shou1ld, however, be taken . 'into account that the occurrence of the Chitinozoa

in

the Lower Arenigian and Tremadocian has so far been rather insufficiently recognized because of a very common great clasticity of these deposits

in

Europe .

. Institute G/. Geochemistry, Milneralogy and Petrography of the W~r8a1D Unilversitu

a.nd

ImtitUite of Pa~y

of the Foltsh A,cademll of SCfiences 02-089 Warszawa, Al. Zwirki i Wigury 93

Warsuw, October 1973

BEDNARCZYK W. 1964. The stratlgraphy ana ;rauna of the 'l'remadoclan and Areni- gim, Oelandian,

m

1be Kae1ce rrEgion

Or

the Holy. Cross MoUntains, ~ddle Po- land. - BiUl. Geol. Uni-w" /Warsz.. val. 4.

wai-stLawa.

1966. Lithology of the Lower Ordovician, Oeiandian in the Xielce region

Of'

the Holy Cross Mts. - Ibidem, -rol. 8.

llm.

stl'a·tigraphy and paleogoography of the Oxdovioian

in

the Holy ("'roSs Mts. -1Adia, Geol. ·IPol., 'V'al. 21, no. 4. WQl"S"Z.a,wa.

B11ASZK!E R. 1007. iPebrogl-a.f.ia

utWlOr6w

ordOw1ku p6linaonego skrzydla nieclki mi~

. dzygllrskiej we WBchodniej czQ6ci GOr Swi~t.okrZY8k:ich (gIladua'te paPer, Insti- tute of Geochemisotry, Mineralogy and Petrography, Univ.ei.-si!tY of Wars.aw -

um.publtshed).

EISENIACK A. '1931. Neqe iMiIkroofossillen des baUlschenSf11m1. I - Palliont. Z., Bd.

13, H. 112. Berlin.

195'5. Neue Chi1lionozoen aus dem Sllur des B8!ltikums tmd dem Devon der

met .:....

Sencken~rg:

Leth..,

^Bd.

36;

^{H. 5/6.}

F.rankfurt'. . .

19158.

-Mtio!.ossilien

auS dem QrdoWzi'lim des ·.Baltikums. - .ibidem,Bd; -3G, H.5.16.

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OBDOVICIAN CH.Fl'INOZOA FROM THE -HOLY· CROSS MTB 327

10012a. Neotypen baU.iseher Silur-ChitinoiDen rind neue Arten. -- N. Jb. GeoL 'Palliont. Abb., Bd. U4, H. 3. stuttgart.

1962'b. \MJ:k!ro:fossiUen aUs dem Ordovizium des Baltikums. Vag-inatenkalk bis Ly-cok holmer StUlfe. - Senokenberg. Leth:, Bd. 43, H. 5. Frankfurt. . 1965. Die Wk!rOfauna der Ostseekalke. 1. Chiti.nozoen, HystrichosphiiTen. - N.-Jb. Qeol. PaUlOlllt. Albb., Bd. 123. H. 2. stuttgart.

1'9i68. "Ober Chil7.inoa:oen des lbaI1t.l.schen 'Gelbietes. - Plllaeoo:tOIgraphica, Ailt. -A, Bd. lSl, Lief. 5-6. Stut'tgart.

JENlK.IiNS W. A. M. 1967. Ordcwici'B!!l ChitinorLoa from Shropshire. - Palaeontology, wl. 10, parl. 3. London.

1969. CbitinOZOa from tIhe Ordavkian Vlola and FerlW.ale Limestones of the At.buokle Mountalrul,Okla.b:oma. - iPalaeontologioal

Assoc.,

Spec. Pap. Palae<m.-

~ogy,DO.5.London. - .

19'10. Chitinozoa from the Ordovician Sylvan Shale do the &buckle Mountains, Oklahoma. - F.a-la:eontology, vol. 13, part 2. London. . -

KOZl.OWSKI R. 1'963. Sur l~' nature des cllf.tinozioaires. - Acta Palaeoo:t. Pol, vol 8, no. 4. Warszawa.

LAUFmLD S. 1967. Caradocian Chitinozoa

h"om

Dalaa-na, Sweden. - Geol F&ren.

Stockh. Ftirhandl., vol 89._Stockholm.

MAINNLL R. 197/l. Distrib1.l!tiom

Of

seiected Ordoviclan Ql1tinoz.oan assemlblages _and species in Northern Europe and their stra~phical evaluation. - :M6m.

B..R.G.M., DO. 'rn, colloque _or~viclen-s.ilurieo. BTesl.

MiARTJiN F. 1969. Chitilnozoaia"~ -de l'.AirenJg sup6rieur ...;.. Uanvtlrn inUnieur en Condroz (Belgique). - ~. M:l'CtapaJ.eon.l~

vol.

12,

no.

^2.^Paris.

M.ASZolllSlK!A E.

lum.

Cbd:tmozoa z ordow:iku p6lnocn()..W9ChodnieJ Polsk1 (graduate paper, lIl9ti.tute of Geology, University of W'Ilrsaw - unpubli$hed).

SAIMlSONQWIcz J. 1916. On the Cambrla!!l rockls of the Holy -Cross Mts, Poland (oin POl:tsh). - Spraw. Tow. Neuk. Warn., R. 9, z. 4. WaIl'I!Iza:wB.

10018. Compte-«"elldu des recherches geologiques executees en 119.2"1 pour la feuille Sandomierz, Massif de Ste Croix. - ~.Nauk. PIG (C.-R. Beaalc.

Serv.

Geol.. Pol.),

or

19/20. Wuszawa •

. Sl1EMlIIRAJ)2lKII J. tl903. Geot~ .2lf.am ~, flom I. iUw6w.

- 1'9l22... ~ Ziem iPo1B1OOb, !Wyr!ytne SwIi.~tokIrzy&ka, rtIdm 1-, wyd. iLl, Ir1Cl'lldz. IIH.

[JwOw.

'DAUGORJDE~U 'PH.-1961. Ch1tLnozoaires- du Siluroiert d'Aquitame. - Rev. Mi-cropa~

leant.,

^w!l.^4,^00.

3.

Paris.

& .Jl!lKBOVSKY B. de. 1960. RepalI'1!iJtion

et

descr.i.ptiQn. des chIi:tirnar.iOlail"es

saJ..u-

~iens de quelqu'E!S sondages de ila C.R.E..P.S., de Ja C.F.IP.A. et de iLa SoN.

RilttPAL -au Sahara. - Rev. Inst. Fraru:. Petrole, vol. 115, no. 9. !Par.is.

TOMCZYK H. 19M.. Stretigr-apby of the Gothlandian of the .Mi~dzyg6rz bas.i.n - (Holy Cross Mts) on the basls d. the tau!!la from ga-apjloHtes sbdes. - BiuI.

:Inst. GeoL 93. Warszawa.

TURNAU-MORAIW'SKlA. M. 1960. lA g1auConittc 'COnglomerarte fll"OOl the Lower Ordo- vician in M.i~zY'g6rz, Holy Cross Mountains, Central pruand. - Ada Geol.

Pol, vollO, no. 2. W'III."Szawa

VM~VA-N. I. 1969. Re,parlition des Ch:i~i.nozoa qanB l'Or~vJ.clt!.n de la! ,plate-focme trusse. --!P~aeont. Zh., no. 3.-Mos'kiva.

ZE,TSZN.E:IaL. 1869. Ober die neuenrtdedlrte Silur.tonn~ _voo Kleczan6w - Z.

iDeutsdl. Geol. Gel., Bd. 2'1, H. 2. Berlin.

ZNOSiKOJ._~.C.IiLE'BorwSK.I.R.tl9'14.-R~d &tir-arbiogu:,a,phy ()Jf7the l.Jawer_ 0rQavdclan :In rbbe HQly CrIOIS& MIIs. - iRIom. P. T. GeoO.. (.Ann.. Soc. Geat. <Pol.) (in 'PI"blt).

·Knk6W. -

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228 ROMAN cm.:i!mOWlSKI &: B'UBERT SZANIAWSKI

CmTINOZOA ZE ZLEPIEN'CA MJ]p)ZYGOBSKmGO Z ORDOWlK.U GOB Sw::or,rOKRZYSKICB

(Streszczeni~)

W olm'uchaeh lupk6w Hastych b~llCyeh jednym ze sldadnik6w pOlimiktycmego zlepielloa dolnego ordow1ku z -Mi~zyg6rza kolo Opatowa (fig. 1) stWier.dzono obee-

DoS~ li<:ZDyeh Ohitioozoa (par. pI. l--f.!). Wyst~pujlloe tutaj gatunki: De8:moch~tioo mi- nor EiBenack, La{Jefwchttina cf. esthon.ica E:isenack i' Rhabdochitma fIUlQoo E1senack, WSkazuj, .na ardowicld {po-lIremadockd) 'W'iek tychlUJpk6w. Poo.ieW6li okruchy h.rp- k6w SIl *ladnilkami 7J~eflca, 'W'iek s.amego ~epieDca lDusi by~

rmlocJsoZy

~ doty<lh-

CzaS priejmoW8I!lO (tremadok w,g' Bednuczyka 19711). Najprawdopodobni~j zlepieniec . mi~dzy.g6rs:k?i .reprezenruje a.ren~, i to .n.ienajn:li.sze jego ogniwa (par; :z;nosko & Ohle-

bowski

1974). W!-i'6d bada:nych Chltinozoa opisano jeden ga'tunek nowY, Cyathochitina primitioo sp. n.

lmtvtut GeochemAt, MinertJlogit i Petrograf.i . UMtDeT811tetu WarS'Za1D8kiego

oraz .

Z4klGd Paleo:IJooZogii Pa1.skie; A:kademii Nauk 02-089_WM8:Za'lDllo, At

ztDirki

i ^Wigur1l93

WaN2la<1Da, w~u 1913

RATE 1

Cyothochoitina prtmttiva sp. n.

1 - cbaan Joomposed of Wro incomplete test.I, 2 - &ing,le .

teat

with a aomparatively nanrow

neck,

'3 - sm1il:l

test

witlh a llongitllClioal furrow on the baBe, 4 - deformed

test

(4a ISJtero-baBal view, 4b la!fJero-apedurail Vliew, showing an Xnpl'eBS of the base

or

nelDt

test

in the ehedln), 5 - hollotype: !Chain campased of two ~ined tests, 6 - long, cyll:indricai

test, ., -

big

test

with vtI&'Jble base (Z. Pal. No. Ch. 111-.1) Lower Ordcwician, Mir:dzyg6rz ~lomet'ate

at

iMi~d.z.yg6rz, Holy Cros:s Mts

All lIPIdmenll are completely flattened; taken c. X 108

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ACTA GEOLOGLCA POLONICA, VOL. 24 R. CHLEBOWSKI & H. SZANIA WSKl, PI. 1

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ACTA GEOLOGICA POLONICA, VOL. Z4 R. CHLEBOWSKI & H. SZANJAWSKI. Pl. 2

3

7

9

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PLA:TE 2

1-3 - RhaJb.dO'c<hitJi7U1 magna EisenaJdk; 1 - ,comPlete, slightly defo<rmed spe'cimen, 2 - upper IpaQ·t ^10d'test wiith a well deve,}oped Icolarette, 3 ~ basall part of test (2. Pwl. NO'. Ch. 1/215-218).

4 - Lagenochitina d. €sthonicu Elisena{lk; specimen with di;stal part of neck bro- ken ,~ '(2. Pail. No. Ch. 1/210).

5-9 - Des:rnvch.itina minor Eis,enack; 5 - 'single, comparatively wi,de te,st, 6 - sdn- g,Je test with 'vdsi!ble ,operculum, 7 -ass€miblage cOtmposed o,f two irregu[ar'ly j{)ined tests, 8 - ,chaiJn Icomposed of three tests, 9 - chain composed {)f three

SIIl1a^lll tests {Z. Pal. No. Ch. I/150-154).

10 - Desmochttina a;f,f. minD'r E'i,s,enack; a 'c,ompaTatively10ng test wi,th 'O!pelr'culum {Z. Pal. No. Ch. 1/200).

11-0!2 - CY'llthochitina rprimitiva sp. n.; 11 - "base with a well visi'ble bas,ail edge and ,concentric lines, 12 - compalrtiveily wide test (Z. Pa,L No. Ch. 1/8-9).

Lower Ordovkian, Md~dzyg6r'z rong,loroe.ralte at Mi~dzyg6ir:z, Holy CrOlS;S Mw All spedme'll'S are mOire or less flattened; Figs ~-3 taken c: >( 80, Figs 4--'12 taken c. X 200