- Tytuł:
- A new Metapolygnathus platform conodont species and its implications for Upper Carnian global correlations
- Autorzy:
-
Mazza, M.
Rigo, M.
Nicora, A. - Powiązania:
- https://bibliotekanauki.pl/articles/22935.pdf
- Data publikacji:
- 2011
- Wydawca:
- Polska Akademia Nauk. Instytut Paleobiologii PAN
- Tematy:
-
Carnian
Conodonta
Late Triassic
Metapolygnathus
Metapolygnathus praecommunisti
stratigraphy
Triassic
conodont
geological setting
new species
paleontology
phylogenesis
systematics
holotype
Paragondolella noah
gondolellid conodont - Opis:
- A rich conodont fauna from two Neotethyan sections, Pizzo Mondello (western Sicily, Italy) and Pignola 2 sections (southern Apennines, Italy) includes conodonts described herein as a new species. Metapolygnathus praecommunisti sp. nov. is transitional between Paragondolella noah and Metapolygnathus communisti. The genus Metapolygnathus (including M. praecommunisti) is now characterised by posterior prolongation of the keel termination, associated with a centrally located pit and with a weak ornamentation confined to the anterior part of the platform margins. The establishment of M. praecommunisti addresses the problems related to the origin and the peculiar, probably facies−controlled, distribution of its descendant species M. communisti. Since M. praecommunisti occurs in the entire Tethys and in North America, we propose the species as a good guide fossil for global correlations, characterised by a short temporal range limited to the uppermost Tuvalian (upper Carnian). The stratigraphic occurrence of the genus Metapolygnathus is restricted to the Tuvalian–Lacian (upper Carnian–lower Norian), excluding its presence in the Julian substage (lower Carnian).
- Źródło:
-
Acta Palaeontologica Polonica; 2011, 56, 1
0567-7920 - Pojawia się w:
- Acta Palaeontologica Polonica
- Dostawca treści:
- Biblioteka Nauki
Artykuł