摘要:

A new species of Podocarpaceae is described from the Miocene diatomite in the Foulden Hills, near Dunedin, New Zealand.Podocarpus travisiaesp. nov. is the first record of broad-leavedPodocarpusfrom New Zealand.

ISSN:0311-5518    

DOI:10.1080/03115519308619601

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

The twelve specimens described by Etheridge (1890) and Tate (1892) originate from the first Australian collections of Archaeocyatha. Few of these are suitable for modern studies and most must be considered asnomina dubia. Only two taxa may be determined at species level and one at genus level. The speciesCoscinocyathus tateiEtheridge 1890 as restricted by Tate (1892) is a senior synonym ofVeronicacyathus frondeusDebrenne 1973, and consequently becomes the type species ofVeronicacyathusDebrenne 1973.

ISSN:0311-5518    

DOI:10.1080/03115519308619602

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

Fairly complete postcranial remains collected by Bonaparte in 1963 in Cerro Cacheuta, Mendoza Province (Argentina) are described in detail. The remains are referred to the Superfamily Brachyopoidea on account of the distinctive architecture of the clavicular dorsal process. The presence of longitudinal ridges on the neural spines and presumably the lack of posterior displacement of the neural spines are considered autapomorphies of the species from Mendoza. The presence of well developed pleurocentra and the lack of conspicuous parapophyses, which are also absent in the Jurassic chigutisauridSiderops kehli, characterize the material described.

ISSN:0311-5518    

DOI:10.1080/03115519308619603

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

Partially disarticulated shark vertebrae from the Lower Cretaceous Toolebuc Formation in central Queensland and the Bathurst Island Formation in the Northern Territory provide probable evidence of the Anacoracidae in Australia, and are possibly referable toPseudocorax. Associated with large shark vertebrae from Canary Station, near Boulia, Queensland, are numerous placoid scales of four primary types which indicate a large pelagic shark. The Canary specimen is one of the few Mesozoic sharks known where scales have been found associated with vertebrae. Problems in referring the new shark material to the Anacoracidae andPseudocoraxare discussed. The significance of vertebral structure and scale morphology in Mesozoic shark evolution and ecology is examined. ‘Lamna daviesii’ Etheridge 1888 is considered anomen dubiumas vertebrae of this kind also occur in other genera in the Lamniformes, Orectolobiformes, and Carcharhinidae.

ISSN:0311-5518    

DOI:10.1080/03115519308619604

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

Conodonts from Visean limestones of the Yarrol and Tamworth Belts of Queensland and New South Wales are, in general, sparsely preserved but widespread and about equally divided between endemic and cosmopolitan species.Patrognathus conjunctussp. nov. is the commonest conodont in the early Visean and gave rise toMontognathus semicarinatusgen. et sp. nov. and toM. carinatusgen. et sp. nov., the trio being name-bearers for three zones based on endemic elements. The fourth and highest Visean zone has the mondialGnathodus texanusandGnathodus bilineatusas joint nominate species, the latter being included in the zonal name to emphasise the restricted definition we adopt forG. texanus. Adetognathusalso probably evolved fromPatrognathusto give a lineage of three new endemic species: —A. taphrognathoides, A. cannindahensisandA. subunicornis, all predating the earliest adetognathids of the northern continents.Cavusgnathus altifronssp. nov. is intermediate in platform morphology and time-range between late TournaisianClydagnathusand late Mississippian species ofCavusgnathus; Synprioniodina? thompsonisp. nov., likewise seems to be intermediate betweenS.? pulchraandHindeodus cristula. Other new taxa are:Mestognathus convexus, Vogelgnathus angustus, Gnathodus rugulatusandG. girtyi maxwelli. Described and illustrated but left in open nomenclature areAdetognathus? sp. A,Cudotaxissp. A,Gnathodussp. A, andRhachistognathussp. J.

ISSN:0311-5518    

DOI:10.1080/03115519308619605

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

ISSN:0311-5518    

DOI:10.1080/03115519308619606

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor