摘要:

A new bivalve, ?Sichuania marwickin. sp., is described from the Early Triassic Smithian or Spathian Substage of New Zealand. The form is a primitive member of the Buchiidae and is believed to be closely related toGlendellaRunnegar from the Glendoo Member of early Middle Permian age (Kungurian) in the Bowen Basin, Queensland. The similarities between the Buchiidae and Eurydesmatidae are discussed.

ISSN:0311-5518    

DOI:10.1080/03115518008558975

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

摘要:

Five new and one previously named species of orthide brachiopods are described from the Early Ordovician Florentine Valley Formation and Karmberg Limestone in the Florentine Valley, 70 km west of Hobart, Tasmania. The forms described areApheoorthis humboldtensissp. nov.,Nanorthis carinatasp. nov.,Archaeorthis subcarinatasp. nov.,Tritoechia lewisiBrown,T. florentinensissp. nov., andT. karmbergensissp. nov. Evidence from isolated graptolite and conodont faunas and from the morphological affinities of the brachiopods themselves indicates that the Florentine Valley Formation extends from the Tremadoc to the early Arenig.

ISSN:0311-5518    

DOI:10.1080/03115518008558976

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

ISSN:0311-5518    

DOI:10.1080/03115518008558977

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

摘要:

Three members of the labyrinthodont Family Capitosauridae are described. Two new species from the Arcadia Formation of the Rewan Group, Queensland, show affinities with more primitive capitosaurs and with pre-capitosaurid groups. A third skull from the Blina Shale of Western Australia is of indeterminate species. These are the first recorded capitosaurs from Queensland and Western Australia and the firstParotosuchusfrom aLystrosaurusZone fauna.

ISSN:0311-5518    

DOI:10.1080/03115518008558978

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

摘要:

Two species of arthropods are described from the earliest Ordovician (Lancefieldian, La 1) Zone east of Lancefield in central Victoria some 60 km north of Melbourne.Corcorania trispinosagen. et sp. nov., with three prominent anterior head spines, seven trunk segments, a short distinctive posterior shield and large spinose appendages, is apparently unrelated to any previously known arthropod, fossil or living, and represents a new family (Corcoraniidae). Similarities between a small specimen ofCorcoraniaandMollisoniafrom the Burgess Shale are noted but no phylogenetic position forCorcoraniais proposed.Caryocaris stewartisp. nov. is described as a new phyllocarid distinguished by the various spines of its carapace and by the shape of its furcal rami.

ISSN:0311-5518    

DOI:10.1080/03115518008558979

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

摘要:

The taxonomy of schizasterid spatangoids is discussed and the term is restricted to include onlySchizaster-like echinoids. Within the genusSchizasterAgassiz the following morphological subgenera are recognized:ParasterPomel,DipneustesArnaud andOvaGray. Seven species are described from Palaeocene to Miocene rocks of Australia. New species areS. (Paraster) carinatus, S. (Paraster) tatei, S. (Schizaster) halliandS. (Dipneustes) fosteri. Schizasterand its various morphotypes are thought to have evolved from aLinthia-like root stock through progressive morphological changes in test shape, form of ambulacra and adoral test morphology. Such changes are interpreted as being adaptations which allowed the sea urchins to occupy various levels of substrate in different sediment types. Morphotypes appear to have evolved iteratively, perhaps due to variation in the onset of sexual maturity.

ISSN:0311-5518    

DOI:10.1080/03115518008558980

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

摘要:

Conodont assemblages identified as representing the Early Devonian zones ofIcriodus woschmidti, Pedavis pesavisandPolygnathus gronbergihave been obtained from limestone horizons within the Cobar Supergroup. These assemblages provide the first accurate correlation for any horizons within the Supergroup. Age determinations of the Rookery Limestone and White Tank Limestone Members of the Meryula Formation suggest the presence of strike faulting not detected by field mapping.Ozarkodina druceananom. nov. (proSpathognathodus philipiDruce 1970) andDelotaxis tenuistriatasp. nov. are discriminated on the basis of their apparatuses of distinctive elements.

ISSN:0311-5518    

DOI:10.1080/03115518008558981

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor