- Tytuł:
- Macrofossil evidence for pleuromeialean lycophytes from the Triassic of Antarctica
- Autorzy:
-
Bomfleur, B.
Krings, M.
Taylor, E.
Taylor, T. - Powiązania:
- https://bibliotekanauki.pl/articles/21746.pdf
- Data publikacji:
- 2011
- Wydawca:
- Polska Akademia Nauk. Instytut Paleobiologii PAN
- Tematy:
-
paleontology
macrofossil
Triassic
pleuromeialean lycophyte
lycophyte
Pleuromeia
Mesenteriophyllum
phytogeography
paleoecology
air chamber
Transantarctic Mountains
Antarctic - Opis:
- Triassic microfloras from Antarctica contain abundant lycophyte spores. However, macrofossils of this group of plants are missing, and thus the precise affinities of the spore producers remain unknown. Macrofossil remains of a pleuromeialean lycophyte, including an incomplete strobilus, isolated sporophylls and sporangia, as well as abundant megaspores, occur on a single rock sample from the central Transantarctic Mountains. Also occurring on the same surface is Mesenteriophyllum serratum, a strap−shaped leaf morphotype of uncertain affinity previously known only from the Kyrgyz Republic and the Taimyr Peninsula. The leaves display alternating transverse ridges and depressions that are similar to structures seen in compressed leaves of various isoetalean lycophytes. Leaf morphology and anatomy, together with the close association of the other lycophyte remains, suggest that M. serratum represents a pleuromeialean lycophyte leaf, which was part of the same plant that produced the sporophylls and sporangia. Sedimentological data indicate that this lycophyte inhabited a swampy, probably coal−forming overbank environment, which contrasts with the assumed xeroto halophytic habit of many other pleuromeialean lycophytes.
- Źródło:
-
Acta Palaeontologica Polonica; 2011, 56, 1
0567-7920 - Pojawia się w:
- Acta Palaeontologica Polonica
- Dostawca treści:
- Biblioteka Nauki
Artykuł