Wyniki wyszukiwania

1

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Semionotus cf. bergeri Agassiz from the Lias of the Holy Cross Mountains, Poland

100%

Maslankiewiczowa Z.

Acta Palaeontologica Polonica

|

1965

|

tom 10

|

nr 1

A specimen of a fish, described here as Semionotus cf. bergeri Agassiz, has been found in the siderite spherolite concretion from the gray claystones of the main ore-bearing series in horizon Ia of the "Edward" mine at Czarniecka Góra near Staporków. This specimen represents two halves of the exoskeleton from their inner sides. The caudal fin and the endoskeleton are lacking. Sediments, in which this fish has been found, belong to the Lower Lias.

2

On a new pygasterid (Echinoidea) from the Jurassic (Middle Lias) of Nevada, U.S.A.

84%

Jesionek-Szymanska W.

Acta Palaeontologica Polonica

|

1970

|

tom 15

|

nr 4

Plesiechinus hawkinsi n. sp. from the Middle Lias of Nevada, U. S. A., the oldest and most primitive representative of an irregular echinoid family of the Pygasteridae Lambert, 1900, displays a "regular" apical system with genital 5 perforate. Crenulate tubercles in the new species contest earlier opinions on the derivation of pygasterids from echinoids with smooth tubercles.

3

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

67%

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.

4

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

67%

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

4 Acta Palaeontologica Polonica

2 Jesionek-Szymanska W.

1 Marcinkiewicz T.

1 Maslankiewiczowa Z.

1 1978

1 1973

1 1970

1 1965

Semionotus cf. bergeri Agassiz from the Lias of the Holy Cross Mountains, Poland

On a new pygasterid (Echinoidea) from the Jurassic (Middle Lias) of Nevada, U.S.A.

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