摘要:

The rugosochonetid genusSvalbardiais recorded for the first time from the Western Australian Permian. The new speciesSvalbardia thomasiis described from the Nalbia Greywacke and the Baker Formation of the Carnarvon Basin, Western Australia. The relationship ofSvalbardiato allied genera of the Rugosochonetidae Muir-Wood is discussed. The disjunct distribution of the genus in the Permian is documented.

ISSN:0311-5518    

DOI:10.1080/03115518108565429

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

Four taxa of fossil leaves from Eocene strata at Maslin Bay, South Australia, are described with particular reference to architectural and epidermal features. Comparisons with extant and fossil taxa indicate that the families Podocarpaceae (Decussocarpus maslinensissp. nov.), Proteaceae (Banksieaephyllum incisumsp. nov.,Maslinia grevilleoidesgen. et sp. nov.) and Araliaceae (Parafatsia subpeltatagen. et sp. nov.) are represented. The taxonomic affinities of the fossils support the interpretation of a wet, subtropical climate during the Middle Eocene in the Maslin Bay region.

ISSN:0311-5518    

DOI:10.1080/03115518108565430

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

Notocarpos garrattigen. et sp. nov. is described from the middle Ludlovian Humevale Formation of the Clonbinane district, Victoria. It is compared with similar anomalocystitid carpoids and is found to resemble most closelyAllanicytidium flemingiCaster & Gill 1968 from the Early Devonian Reefton Beds of New Zealand.N. garrattiprovides evidence that anomalocystitids rested with the flattened thecal surface against the sea floor (i.e., an orientation opposite to that proposed by Jefferies, 1968). It is further suggested that the stele was adapted to provide a rearward mode of locomotion.

ISSN:0311-5518    

DOI:10.1080/03115518108565431

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

Dermal denticles of two thelodont agnathans,Australolepis seddonigen. et sp. nov., and a possible nikoliviid gen. et sp. indet. are described from the Gneudna Formation, a marine sequence of interbedded limestone and shale exposed on the eastern edge of the Carnarvon Basin, Western Australia. The age and significance of these new forms are discussed. The Gneudna Formation is Late Devonian, probably early Frasnian, which, if confirmed, makes these the youngest thelodonts known to date.

ISSN:0311-5518    

DOI:10.1080/03115518108565432

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

During the ten years covered by this review, the foci of studies in palaeobotany of plant megafossils and certain non-palynological plant microfossils included Precambrian palaeobotany, early vascular plants, Palaeozoic pteridosperms, conifers, and angiosperms. Botanically orientated investigations displayed an increasing use of the electron microscope. Interpretations of palaeoecology and reproductive biology of fossil plants gained increasing momentum. Biostratigraphic studies underwent some new activation but generally took second place to the amount of morphological work. The number of palaeobotanists who completed or received their training during the decade augurs well for the future; there is still much to be done.

ISSN:0311-5518    

DOI:10.1080/03115518108565433

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

An assemblage of hermatypic scleractinian corals occurring landwards of the Pleistocene sandy Inner Barrier system has been referred to the last interglacial period. It comprises at least 20 species, many of which are in growth position, and is accompanied by a substantial association of molluscans. The richness of the assemblage is indicative of good access of oceanic waters at the time of its formation, so the deposit predates barrier emplacement. The coral occurrences are compared with present-day southern ranges of the scleractinian species (all extant), and the implications for climatic and sea-level conditions in the last interglacial are discussed. A sea-level stand of 4–6 m above that at present obtaining (in accord with Marshall & Thom, 1976) and a climatic shift towards a cooler regime equivalent to a minimum of 2° of latitude are concluded.

ISSN:0311-5518    

DOI:10.1080/03115518108565434

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor