Document type
Journal articles
Document subtype
Full paper
Title
A Kralodvorian (upper Katian, Upper Ordovician) benthic association from the Ferradosa Formation (central Portugal) and its significance for the redefinition and subdivision of the Kralodvorian Stage
Participants in the publication
J. Colmenar (Author)
S. Pereira (Author)
M. Pires (Author)
C. Marques da Silva (Author)
Dep. Geologia
IDL
A.A. Sá (Author)
T.P. Young (Author)
Summary
AnewupperKatian(KralodvorianRegionalStage)benthicassociationfromtheRibadeCimaMemberoftheFerradosa Formation,Portugal,isdescribed.Itisdominatedbybryozoansandechinodermsbutbrachiopodsandtrilobitesarealso present.Morethan20speciesofbrachiopods,nineoftrilobitesandeightofechinodermshavebeenidentifiedinthefour studied localities. Among the brachiopods Kjaerina (Villasina) meloui Colmenar, 2016, Dolerorthis abeirensis Mélou, 1990 and Bicuspina cf. armoricana Mélou, 1990 are significant. These species were previously recorded only in the uppermostRosanFormation(ArmoricanMassif,France).PorambonitesdreyfussiHavlí?ek,1981isalsoreportedinthis paperforthefirsttimebesidesitstypehorizonintheupperpartoftheKralodvorianGabianFormation(MontagneNoire, France). Most of the identified trilobite taxa were previously documented only in the Kralodvorian Cystoid Limestone Formation (Iberian Chains, Spain), except Parillaenus? cf. creber Hammann, 1992 and Amphoriops cf. inflatus (Hammann,1992),whosereferredspeciesarealsopresentintheupperBerounian–KralodvorianPortixedduFormation in Sardinia. The record of “Ceraurinus” meridianus (Hammann, 1992), “Bumastus” aff. commodus Apollonov, 1980 andAmphoriopscf.inflatusrepresentthefirstoccurrenceofthesegenera-groupsinPortugal.Theserecordsareimportant additions to the knowledge of the Portuguese Late Ordovician benthic marine communities, providing crucial new data to constrain the biostratigraphy of the Riba de Cima Member and the palaeogeographical setting of this region at thattime.Inaddition,someofthebrachiopodoccurrenceswithmorerestrictedstratigraphicalrangesprovideinvaluable toolsforenablingmoreprecisesubdivisionoftheKralodvorianregionalstage.•Keywords:SouthGondwana,Ribade Cima Member, Buçaco Syncline, upper Katian, Nicolella Fauna.\\\\\\\\n
Date of Submisson/Request
2016-10-28
Date of Acceptance
2017-07-17
Date of Publication
2017-12-18
Institution
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA
Where published
Bulletin of Geosciences
Publication Identifiers
ISSN - 1802-8225
Address
Prague, Czech Republic
Publisher
Czech Geological Survey
Number of pages
21
Starting page
443
Last page
464
Document Identifiers
DOI -
https://doi.org/10.3140/bull.geosci.1643
Rankings
SCIMAGO Q1 (2017) - 0.743 - Earth and Planetary Sciences (miscellaneous)
SCIMAGO Q2 (2017) - 0.743 - Environmental Science (miscellaneous)
SCOPUS Q2 (2017) - 0.743 - General Earth and Planetary Sciences
SCOPUS Q2 (2017) - 0.743 - General Environmental Science