Geomorphic and tectonic significance of early Cretaceous lavas on the coastal plain, southern New South Wales

1996 ◽  
Vol 43 (6) ◽  
pp. 687-692 ◽  
Author(s):  
M. Orr ◽  
M. C. Brown ◽  
J. Nott ◽  
A. C. Purvis
Keyword(s):  
Early Cretaceous ◽  
Coastal Plain ◽  
New South ◽  
New South Wales ◽  
South Wales ◽  
Tectonic Significance

scholarly journals Ornithopod diversity in the Griman Creek Formation (Cenomanian), New South Wales, Australia

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e6008 ◽  
Author(s):  
Phil R. Bell ◽  
Matthew C. Herne ◽  
Tom Brougham ◽  
Elizabeth T. Smith
Keyword(s):  
Early Cretaceous ◽  
High Latitude ◽  
New South ◽  
New South Wales ◽  
Rift System ◽  
Meeting Point ◽  
The North ◽  
Southeastern Australia ◽  
South Wales

During the Early Cretaceous, dinosaur communities of the Australian-Antarctic rift system (Eumeralla and Wonthaggi formations) cropping out in Victoria were apparently dominated by a diverse small-bodied ‘basal ornithopod’ fauna. Further north, in Queensland (Winton and Mackunda formations), poorly-represented small-bodied ornithopods coexisted with large-bodied iguanodontians. Our understanding of the ornithopod diversity from the region between the Australian-Antarctic rift and Queensland, represented by Lightning Ridge in central-northern New South Wales (Griman Creek Formation), has been superficial. Here, we re-investigate the ornithopod diversity at Lightning Ridge based on new craniodental remains. Our findings indicate a diverse ornithopod fauna consisting of two-to-three small-bodied non-iguanodontian ornithopods (includingWeewarrasaurus pobenigen. et sp. nov.), at least one indeterminate iguanodontian, and a possible ankylopollexian. These results support those of previous studies that favour a general abundance of small-bodied basal ornithopods in Early to mid-Cretaceous high-latitude localities of southeastern Australia. Although these localities are not necessarily time-equivalent, increasing evidence indicates that Lightning Ridge formed a ‘meeting point’ between the basal ornithopod-dominated localities in Victoria and the sauropod-iguanodontian faunas in Queensland to the north.

Distributional relations of two species of Psednura (Orthoptera : Pyrgomorphidae) in the Evans Head area of New South Wales

1972 ◽  
Vol 20 (4) ◽  
pp. 411 ◽  
Author(s):  
KHL Key ◽  
J Balderson
Keyword(s):  
Coastal Plain ◽  
New South ◽  
New South Wales ◽  
Median Line ◽  
Mosaic Pattern ◽  
South Wales ◽  
Mixed Populations ◽  
Mosaic Distribution ◽  
Habitat Feature ◽  
Head Area

The distribution of Psednura pedestris and the northern race of P. musgvavei was studied in relation to habitat in the heathy vegetation of the sandy coastal plain near Evans Head, N.S.W. The density of both species was in general very low, corresponding to an average of only one specimen captured per man-hr; in a few patches it rose to several times that figure. The distribution of the two species was in the main mutually exclusive in a mosaic pattern reflecting the mosaic distribution of the respective preferred habitats, pedestvis occurring on the margins of swamps and musgravei on somewhat better drained sites. However, at three locations mixed populations were found in the ecotone between the two habitats. At one of these, which was studied in detail, the zone of overlap was never wider than 12 m, and the highest density of each species occurred within a 2-m strip on either side of a median line related to a prominent habitat feature. The situation is compared and contrasted with that in parapatric species and races of morabine grasshoppers.

An enigmatic (Synapsid?) tooth from the Early Cretaceous of New South Wales, Australia

2003 ◽  
Vol 23 (1) ◽  
pp. 232-237 ◽  
Author(s):  
William A. Clemens ◽  
Gregory P. Wilson ◽  
Ralph E. Molnar
Keyword(s):  
Early Cretaceous ◽  
New South ◽  
New South Wales ◽  
South Wales

The occurrence of unisexuality and polyploidy in Isotoma fluviatilis

1968 ◽  
Vol 16 (3) ◽  
pp. 525 ◽  
Author(s):  
JA Mccomb
Keyword(s):  
Coastal Plain ◽  
New South ◽  
New South Wales ◽  
South Australia ◽  
Marginal Populations ◽  
The West ◽  
South Wales

In northern New South Wales Isotoma fluviatilis is diploid and hermaphrodite; in southern New South Wales, Victoria, South Australia, and Tasmania it is tetraploid and hermaphrodite; on the coastal plain to the west and north of Sydney it is diploid and dioecious; and near Rylstone (N.S.W.) there occurs one gynodioecious population. The morphology of the different forms is described, and the possibility is discussed that unisexuality and polyploidy in I. Fluviatilis represent alternative mechanisms by which hybridity has been increased in inbreeding marginal populations of diploid hermaphrodites, and that these two mechanisms have been associated with the elaboration of genetic constitutions enabling new territory to be invaded.

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