Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: Upper Lias

Sortuj według:

Ogranicz wyniki do:

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

On a new Galeropygid genus (Echinoidea) from the Jurassic (upper Lias) of Marocco

100%

Jesionek-Szymanska W.

Acta Palaeontologica Polonica

1978

tom 23

nr 2

Considered as holectypoid (Gnathostomata) Pygaster microstoma Lambert, 1933 from the Toarcian of Morocco is actually the most primitive galeropygid (Atelostomata) for which the new genus Eogaleropygus is proposed. Incipient “irregular” position of the periproct and very shallow anal groove are in sharp contrast with much more advanced evolutionary changes such as small size and unnotched peristome (external manifestations of the loss of dental apparatus and gills) as well as dense and unordered tuberculation. The morphology of Eogaleropygus suggests that galeropygids became atelostomate probably long before they became bilateral.

Otozamites falsus (Bennettitales) from the Upper Liassic of the Holy Cross Mts, Poland

100%

Marcinkiewicz T.

Acta Palaeontologica Polonica

1973

tom 18

nr 2

The remains of a leaf of the bennettite Otozamites falsus is here described from the Wyszmontów borehole in the eastern margin of the Holy Cross Mts. The remains come from deposits whose age has been determined, on the basis of megaspores, as Upper Liassic.

Ograniczanie wyników

2 Acta Palaeontologica Polonica

1 Jesionek-Szymanska W.

1 Marcinkiewicz T.

1 1978

1 1973

Wyniki wyszukiwania

On a new Galeropygid genus (Echinoidea) from the Jurassic (upper Lias) of Marocco

Otozamites falsus (Bennettitales) from the Upper Liassic of the Holy Cross Mts, Poland