Wszystkie pola: Feist, R. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Trilobites from the latest Frasnian Kellwasser crisis in North Africa [Mrirt, Central Moroccan Meseta]
Autorzy:: Feist, R
Powiązania:: https://bibliotekanauki.pl/articles/20541.pdf
Data publikacji:: 2002
Wydawca:: Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:: trilobite
fauna
Frasnian
Trilobita
location
Kellwasser crisis
biogeography
Africa
Morocco
paleontology
Opis:: Latest Frasnian trilobites are recorded for the first time from North Africa. They occur in oxygenated limestones between the Lower and Upper Kellwasser horizons at Bou Ounabdou near Mrirt, central Moroccan Meseta. The faunas are very close to the contemporaneous associations in European sections both by their taxonomic composition and by patterns of evolutionary behavior towards eye reduction. Two new taxa are described: Gondwanaspis mrirtensis gen. et sp. nov., which is the last known representative of the Odontopleuridae before its extinction at the base of the Upper Kellwasser horizon, and Pteroparia ziegleri maroccanica subsp. nov., a geographical variant of the nominal subspecies from Sessacker in the Rhenish Slate Mountains.
Źródło:: Acta Palaeontologica Polonica; 2002, 47, 2
0567-7920
Pojawia się w:: Acta Palaeontologica Polonica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Ontogeny of a new cyrtosymboline trilobite from the Famennian of Morocco
Autorzy:: Loresey-Aubril, R
Feist, R.
Powiązania:: https://bibliotekanauki.pl/articles/20463.pdf
Data publikacji:: 2005
Wydawca:: Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:: trilobite
cyrtosymboline trilobite
Famennian
Trilobita
ontogenesis
Proetoidea
Cyrtosymbolinae
protaspis
remains
Morocco
paleontology
Opis:: Abundant trilobite remains were recovered from late mid−Famennian marlstones from various sites in Eastern Tafilalet, southeast Morocco. All belong to a single taxon previously identified as Cyrtosymbole (Waribole) prima. This taxon is designated the type species of Osmolskabole gen. nov. A redefinition of this species, including the description of newly discovered, disarticulated exuviae both in limestone and silicified state of preservation, is given. In particular, silicified sclerites of various sizes allow the first complete growth series of a cyrtosymboline proetid to be presented. The close morphological resemblance of its protaspid stages to known proetoid larvae emphasizes the homogeneity of the early ontogeny in this superfamily. The Famennian proetoid anaprotaspis is also of comparable size to that of other Devonian proetoid larvae. However, their size−range is much less than that observed in Carboniferous larvae. This suggests that the survival of proetoid trilobites at the Frasnian−Famennian Kellwasser crisis did not result from a modification of the developmental strategy, as it might have been the case at the terminal Devonian extinction event. Moreover, O. prima possesses a plectrum from the metaprotaspid to the mid meraspid periods. This implies that the natant hypostomal condition is not steadily acquired early in the ontogeny of the Proetida. Thus we preclude the use of this character in the diagnosis of this order.
Źródło:: Acta Palaeontologica Polonica; 2005, 50, 3
0567-7920
Pojawia się w:: Acta Palaeontologica Polonica
Dostawca treści:: Biblioteka Nauki

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