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Wyszukujesz frazę "Roniewicz, E." wg kryterium: Autor


Wyświetlanie 1-2 z 2
Tytuł:
The Middle Triassic scleractinia-like coral Furcophyllia from the Pamir Mountains
Autorzy:
Melnikova, G K
Roniewicz, E.
Powiązania:
https://bibliotekanauki.pl/articles/22926.pdf
Data publikacji:
2007
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
scleractinia-like coral
Italy
Alps Mountains
Pamir Plateau
Middle Triassic
Tajikistan
Furcophyllia shaitanica
distribution
paleontology
Opis:
Furcophyllia is an unusual coral with septa regularly splitting into branching sets called septal brooms. This pattern of septal apparatus is so alien to scleractinians, that, despite a trabecular microstructure of septa resembling that of the Scleractinia, the genus was originally ascribed to a rare group of corals informally referred to as sleractiniamorphs, previously known from the Ordovician and Permian. Genus Furcophyllia emerged together with corals of several groups, after the post−Permian crisis diversification of skeletonized anthozoans, some of them markedly differing in their skeletal features from typical Scleractinia. So far, the genus was represented by middle Carnian Furcophyllia septafindens from the Dolomites, in the Southern Alps. Here, we report Furcophyllia shaitanica sp. nov. from limestone boulders found in the volcano−clastic deposits of the upper Ladinian Šajtan suite of the South Eastern Pamirs. A new species of Furcophyllia signifies that the genus was a faunal element widely distributed in the Tethys.
Źródło:
Acta Palaeontologica Polonica; 2007, 52, 2
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A model for furcate septal increase in a Triassic scleractiniamorph
Autorzy:
Stolarski, J
Roniewicz, E.
Grycuk, T.
Powiązania:
https://bibliotekanauki.pl/articles/23100.pdf
Data publikacji:
2004
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Triassic
Italy
Scleractinia
computer model
septal growth
paleontology
Opis:
Triassic corals with septa that branch repeatedly and centripetally are here assigned to a new genus Furcophyllia. Septa of F. septafindens (Volz, 1896), re−described from the Italian Dolomites, are composed of 3–10 blades (“septal brooms”). Distances between adjacent septa and their branches are equal, and the thickness of all blades is approximately the same throughout ontogeny. However, none of the septal brooms show the same branching pattern. Proposed herein is a simple computer model that reproduces septal pattern, similar to that of Furcophyllia, based on a minimal set of rules: (i) uniform coverage of intra−calicular space; (ii) regular bifurcations following some probability; (iii) keeping some minimal distance between septal branches. The elaborate septal pattern of Furcophyllia suggests a distinct organization of the polyp’s soft tissue, especially mesenteries whose appearance in modern corals is associated with insertion of sclerosepta. Hypothesis 1 suggests that mesenterial pairs flanked only “septal brooms” and that septal branches functionally corresponded with septal microarchitecture. Hypothesis 2 suggests that mesenterial pairs developed between all septal branches that functionally correspond with conventional septa. Delicate menianae, which developed on Furcophyllia septal faces (and many other Triassic corals) resemble similar septal microarchitecture of the Recent agariciid Leptoseris fragilis and may be closely related to the suspension feeding strategy of this coral. The furcate septal arrangement in Furcophyllia is unique among Triassic corals, and generally, among Mesozoic and Cenozoic corals. The only analogous corals are Cretaceous aulastraeoporids (e.g., Preverastrea, Paronastraea), Trochoidomeandra, and some Jurassic rhipidogyrids having secondary (apophysal) septal branches. In some Recent caryophylliids (Trochocyathus rhombocolumna, Phacelocyathus flos) primary septa may also split dichotomously and centripetally.
Źródło:
Acta Palaeontologica Polonica; 2004, 49, 4
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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