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Devonian phoebodont shark teeth

100%

Ginter M., Ivanov A.

Acta Palaeontologica Polonica

1992

tom 37

nr 1

55-75

Shark teeth of the phoebodont type are the most common and diverse group of Upper Devonian ichthyoliths in the pelagic facies of the Holy Cross Mountains (Poland), South Urals and Timan (Russia). They were also found in the Givetian of Kuznetsk Basin (western Siberia). The morphology and function of tooth apparatus of Phoebodus was possibly similar to that of the recent shark Chlamydoselachus anguineus. A significant loss of diversity and relative productivity has been observed among the phoebodonts in the earliest Famennian. A new genus, Omalodus gen. n., and three new species of Phoebodus, Ph. bifurcatus sp. n., Ph. fastigatus sp. n. and Ph. turnerae sp. n. are proposed.

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

88%

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.

Ograniczanie wyników

2 Acta Palaeontologica Polonica

1 Ginter M.

1 Ivanov A.

1 Liszkowski J.

1 Racki G.

2 1992

Wyniki wyszukiwania

Devonian phoebodont shark teeth

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