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Bashkirian rugose corals from the Carboniferous Mattson Formation in the Liard Basin, northwest Canada - stratigraphic and paleobiogeographic implications

100%

Fedorowski J. , Bamber E. W. , Richards B. C.

Acta Palaeontologica Polonica

2019

tom 64

nr 4

Colonies of the rugose corals Nemistium liardense sp. nov. and Heritschioides simplex sp. nov. were collected from limestone in the upper member of the Mattson Formation in the Liard Range in the Northwest Territories and are the only known identifiable coral species from the Mattson Fm. The Mattson Fm., deposited in the Liard Basin west of the syndepositional Bovie reverse fault, comprises sandstone with subordinate shale and carbonates deposited during several delta cycles. The close morphological similarity and identical mode of offsetting in N. liardense colonies from the Mattson Fm. and the allochthonous Stikine Terrane of British Columbia indicate they belong in the same species. This and the morphological similarity between H. simplex and the late Serpukhovian to early Bashkirian H. columbicum allow assignment of the coral-bearing part of the upper Mattson Fm. to Bashkirian Foraminiferal Biozone 20. Widespread occurrence of the genus Nemistium confirms open communication between the Liard Basin region and the western European and northern African seas.

A new eumyarionine cricetid from Pakistan

100%

Lindsay E. H.

tom 39

nr 1

Emsian Chitinozoa from the Buchan area of southeastern Australia

100%

Winchester-Seeto T.

Acta Palaeontologica Polonica

1996

tom 41

nr 2

Emisian chitinozoans from two sections through the Taravale Formation, near Buchan, southeastern Australia are doucmented. The fauna bears little resemblance to those extracted from contemporaneous successions in other parts of the globe. Seven chitinozoan assemblages are recognised with local stratigraphic application. Possible reasons for the unique composition of the fauna include biased preservation, highly developed endemism in the Emsian and an unusual depositional environment. The last suggests a degree of facies dependency in chitinozoans. Fifteen new species: Angochitina chilikalla, A. kurnai, A. warrugang, Bursachitina (Bursachitina) ngarigo, B. (B.) talenti, B. (Amplichitina) bidawal, B. (A.) jaimathang, B. (A.) kurritgo, B. (A.) erasilis, Eisenackitina birubi, E. hebeta, E. subditiva, E. warnangatte, E.? vieta, and E. yaraan are desribed. Two new subgenera are erected, Bursachitina (Bursachitina) and B. (Amplichitina).

The beginning of the age of Murinae [ Mammalia: Rodentia ] in southern France

80%

Aguilar J. P. , Michaux J.

tom 39

nr 1