Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: zarlacze

Sortuj według:

Ogranicz wyniki do:

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Ichthyoliths and deepening events in the Devonian carbonate platform of the Holy Cross Mountains

100%

Liszkowski J., Racki G.

Acta Palaeontologica Polonica

1992

tom 37

nr 2-4

407-426

Disarticulated fish microremains from the Middle Givetian to early Frasnian of the Holy Cross Mts include representatives of the most groups known from the Devonian: placoderms, elasmobranchs, holocephalians, acanthodians, osteichthyans (mostly osteolepidids) and actinopterygians. Taxonomic identifications are possible usually only in very general terms and only in two cases the generic level has been reached: Phoebodus among euselachians, and Moythomasia among paleoniscids. Many of these groups, regarded traditionally as typical dwellers of lacustrine to resticted marine nearshore biotopes, apparently flourished also in the offshore, open shelf carbonate (peri-reefl settings. The sequential replacement of the fish faunas was primarily influenced by eustatic events, in like manner to invertebrate communities.

Early Jurassic selechians from the Hasle Formation on Bornholm, Denmark

86%

Rees J.

Acta Palaeontologica Polonica

1998

tom 43

nr 3

439-452

A selachian fauna from the early Pliensbachian (Uptonia jamesoni to Prodactylioceras davoei zones) is recorded from the Hasle Formation on the island of Bornholm. Three hybodont sharks, Hybodus reticulatus, H. delabechei and Lissodus hasleensis sp. n., and three neoselachians, Synechodus occultidens, Paraorthacodus sp. and Agaleus dorsetensis, are recognized in the fauna. The enameloid ultrastructure of teeth of A. dorsetensis was examined and found to be comprised of at least two layers, confirming a neoselachian affinty, based on the overall tooth morphology. The palaeogeographical and stratigraphical records of the previously described species are extended. Pliensbachian selachian faunas are not well investigated and the described species in the Hasle fauna are all known from Sinemurian deposits elsewhere.

Ograniczanie wyników

2 Acta Palaeontologica Polonica

1 Liszkowski J.

1 Racki G.

1 Rees J.

1 1998

1 1992

Wyniki wyszukiwania

Ichthyoliths and deepening events in the Devonian carbonate platform of the Holy Cross Mountains

Early Jurassic selechians from the Hasle Formation on Bornholm, Denmark