A new cephalopod collection from the Campanian-Maastrichtian boundary interval of NE Mexico, consisting of 1076 individuals assigned to 29 species and 22 genera is presented. This collection is a mix of ammonoids, one coleoid and one nautilid, which originate from at least three ammonoid biozones: The upper Campanian Exiteloceras jenneyi and Nostoceras (Nostoceras) hyatti zones, and the lower Maastrichtian Pachydiscus (Pachydiscus) neubergicus Zone. The age of the collection is thus middle late Campanian to late early Maastrichtian, and it closes a stratigraphic gap between faunas described formerly from this region. The specimens are nuclei collected from the desert pavement. The abundance of specimens allows for a comparison to other Campanian-Maastrichtian ammonoid records from Mexico, North America and Europe.
2
Dostęp do pełnego tekstu na zewnętrznej witrynie WWW
The ammonoid Beneckeia tenuis (Seebach) is recorded from the Rhaetian (Lower Anisian) of the Holy Cross Mountains. Three specimens were collected from a single rock layer that is typical of epicontinental sea deposition of the time.
PL
Opisano amonity Beneckeia tenuis (Seebach) z retu (dolny anizyk) Gór Świętokrzyskich. Charakteryzowana fauna obejmuje trzy okazy typowo epikontynentalnej formy Beneckeia tenuis, które pochodzą z jednej warstwy skalnej.
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.