Wszystkie pola: Rustan, J.J. - Katalog OPAC zbiorów

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Tytuł:: Lamellorthoceratid cephalopods in the cold waters of southwestern Gondwana: Evidences from the Lower Devonian of Argentina
Autorzy:: Cichowolski, M.
Rustan, J.J.
Powiązania:: https://bibliotekanauki.pl/articles/2082150.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:: Cephalopoda
Lamellorthoceratidae
Arthrophyllum
Palaeozoic
Talacasto Formation
Malvinokaffric
Realm
Precordillera Basin
Argentina
Opis:: Based on three specimens assigned to Arthrophyllum sp., the family Lamellorthoceratidae is reported from the Lower Devonian Talacasto Formation in the Precordillera Basin, central western Argentina. These Devonian cephalopods have been known only from low to mid palaeolatitudes and its presence in the cold water settings of southwestern Gondwana is notable. A nektonic mode of life, not strictly demersal but eventually pelagic, with a horizontal orientation of the conch is proposed for adults lamellorthoceratids, whereas a planktonic habit is suggested for juvenile individuals. These features would had allow their arrival to this southern basin, explaining their unusual presence in the Malvinokaffric Realm, and reinforcing the need of re-evaluate the distribution pattern of several groups of cephalopods.
Źródło:: Acta Palaeontologica Polonica; 2020, 65, 2; 305-312
0567-7920
Pojawia się w:: Acta Palaeontologica Polonica
Dostawca treści:: Biblioteka Nauki

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Tytuł:: A new Mississippian hexactinellid sponge from the western Gondwana: Taxonomic and paleobiogeographic implications
Autorzy:: Carrera, M.G.
Rustan, J.J.
Vaccari, N.E.
Ezpeleta, M.
Powiązania:: https://bibliotekanauki.pl/articles/22545.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Instytut Paleobiologii PAN
Opis:: A Mississippian hexactinellid sponge from the western Argentina improves the extremely poor late Paleozoic sponge records from Gondwana. The sponge is included in the subfamily Thysanodictyinae of family Dictyospongiidae. The new genus and species Minitaspongia parvis is erected, and its well-preserved spicular structure is described in detail representing the first approximation of the spicule assemblage in Thysanodictyinae. The skeleton is clathrate, three-dimensional with at least two ranks of rectangular openings. This first report of this subfamily outside North America represents the best-known hexactinellid and the first dictyosponge record from the Carboniferous of Gondwana. Unlike the occurrences of Thysanodictyinae in North America, with thick skeletons linked to high-energy shallow water settings, Minitaspongia occurs in low-energy water siliciclastic settings related to a cold climate and glacimarine deposits. Accordingly, the complex wall structure of this sponge should not be invoked as a necessary adaptation to high energy and shallow water settings.
Źródło:: Acta Palaeontologica Polonica; 2018, 63, 1
0567-7920
Pojawia się w:: Acta Palaeontologica Polonica
Dostawca treści:: Biblioteka Nauki

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