摘要:

Two new catillocrinid genera are described from the Permian of eastern Australia.Notiocatillocrinusgen. nov. is erected for two speciesN. oakiensissp. nov. — the type — from late Sakmarian/early Artinskian sediments in northern New South Wales, andN. nerimberae(McKellar) from early Artinskian sediments in Queensland.Taucatillocrinusgen. nov. is erected forT. cephalonussp. nov. — the type — from late Artinskian sediments in southern New South Wales. A second speciesT.?giganteussp. nov. from the same locality as the type is tentatively assigned to the genus. The genera are readily distinguished from those from the Permian of the now comparatively proximal Timor though both exhibit similarities toParacatillocrinusWanner from this island.

ISSN:0311-5518    

DOI:10.1080/03115517808619081

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

Wijdeaspis warrooenissp. nov. is described from the Taemas Limestone near Wee Jasper, N.S.W. Two specimens are referred to the species, an incomplete skull-roof and a spinal plate. The skull fragment shows new details of braincase structure including attachment of the occipital region of the endocranium to the skull-roof over its whole length, and the presence of an endocranial shelf roofing over the cucullaris fossa. These features are regarded as primitive for petalichthyids. A new restoration shows the glenoid processes and foramen magnum to be similarly developed toKujdanowiaspis, but the high position of the lateral line canal and the absence of a preserved anterior dorsolateral plate preclude an adequate functional interpretation of the neck-joint. Two dermal structures support the posterior region of the endocranium — a paired lateral process may correspond to the brachythoracid para-articular process, and paired depressions on the ventral nuchal lamella resemble the articular fossae in brachythoracids.

ISSN:0311-5518    

DOI:10.1080/03115517808619082

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

Late Ordovician formations in central-western New South Wales yield lingulide and acrotretide inarticulate brachiopods occurring in lithologies and faunal assemblages indicative of deeper-water (outer shelf-slope) environments of deposition, associated with volcanic island chains in the Tasman Geosyncline. Two new, monotypic, genera,AnomaloglossaandCasquellaof subfamily Glossellinae, and six new species (Anomaloglossa porca, Casquella bifida, Conotreta? hetera, Elliptoglossa adela, Paterula gigantaandP. malongulliensis) are described and illustrated; two additional forms —Elliptoglossasp.,Paterulasp. — are recognised. Palaeoecology of these Late Ordovician species, with particular emphasis on life orientation and mode of attachment, is deduced from functional morphology and faunal associations.Casquellais a minor component of a high diversity trilobite-strophomenid assemblage occupying an outer shelf habitat. The giganticAnomaloglossaforms part of a graptolite-sponge-trilobite-brachiopod association which accumulated in a deeper-water slope environment.Paterula gigantaoccurs withClimacograptusin siltstones of an inferred deeper, quieter-water origin. Literature on habitat diversity of pedunculate inarticulates is reviewed, and previously recognised deeper-water palaeocommunities are compared with these New South Wales Late Ordovician faunal associations.

ISSN:0311-5518    

DOI:10.1080/03115517808619083

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

ISSN:0311-5518    

DOI:10.1080/03115517808619084

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

A proterosuchian reptile,Tasmaniosaurus triassicusgen. et sp. nov. was found in a pond deposit within the Knocklofty Formation of Early Triassic age near Hobart, southern Tasmania. It is the first evidence of this group in Australia. It shows many similarities withProterosuchusandEuparkeriabut some similarities to other proterosuchians, especially proterochampsids, some phytosaurs and even eosuchians on the one hand and early theropods on the other.

ISSN:0311-5518    

DOI:10.1080/03115517808619085

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

Foraminiferids, radiolarians, ostracods, diatoms, dinoflagellates, acritarchs, spores, and pollen are recorded from the type outcrop section of the Wallumbilla Formation in the Surat Basin, southern Queensland. The microfossils were recovered from calcareous mudstone nodules at two locations in the Doncaster Member. The foraminiferids belong to theBigenerina pitmaniZone; the dinoflagellates to theOdontochitina operculataZone; and the spores and pollen to theOsmundacidites dubiusZone (middle and upper part ofCyclosporites hughesiiSubzone). The microfossils are associated with a predominantly molluscan megafauna typical of theMaccoyella barklyiZone. The fossil association probably inhabited a slightly hyposaline, shallow sea. The microfossils themselves offer no definitive evidence regarding their precise age; they are broadly determined as late Early Cretaceous. Ammonites associated with theMaccoyella barklyiZone, however, indicate that the microfossils are probably oflate Aptian age.

ISSN:0311-5518    

DOI:10.1080/03115517808619086

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor