Palaeoecological implications of neoselachian shark teeth from the Bathonian (Middle Jurassic) ore-bearing clays at Gnaszyn, Kraków-Silesia Homocline, Poland

• Autorzy: Rees J.
• Języki publikacji: EN

Abstrakty

EN

Systematic sampling through the Middle and Upper Bathonian strata at Gnaszyn has resulted in the discovery of 13 neoselachian teeth. Systematically, the teeth represent five taxa including Sphenodus sp., Protospinax sp. 1, Protospinax sp. 2, Palaeobrachaelurus sp. and another, indeterminate orectolobiform. The presence of two species of the flattened and bottom-dwelling Protospinax and two different orectolobiforms that are likely to have lived near the bottom, is a strong indication of oxygenated bottom conditions at the time of deposition. The dietary preferences of these taxa included a wide variety of benthic invertebrates. The synechodontiform Sphenodus may have been the first pelagic predatory neoselachian in the Jurassic, equipped with high and slender piercing teeth that formed a tearing-type dentition. The diet of Sphenodus probably included bony fish, smaller sharks and cephalopods.

Słowa kluczowe

EN

Bathonian; Gnaszyn; Jurassic; Kraków-Silesia Homocline; Neoselachii; palaeoecology; Poland

PL

baton; Gnaszyn; jura; monoklina śląsko-krakowska; paleoekologia; Polska

• Wydawca: Faculty of Geology of the University of Warsaw ; Komitet Nauk Geologicznych PAN
• Czasopismo: Acta Geologica Polonica
• Rocznik: 2012
• Tom: Vol. 62, no. 3
• Strony: 397--402
• Opis fizyczny: Bibliogr. 17 poz.,

Twórcy

autor

Rees J.

• Soldattorpet 48, SE-653 50 Karlstad, Sweden

Bibliografia

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