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| Levy, A. |
| In the sedimentary areas surrounding the Florida Keys, Soritidae and Peneroplidae are very well represented. These benthic foraminifera are generally attached to seagrasses or algae and more rarely to carbonate deposits. The colouring of their protoplasm results from the nature of endosymbiotic algae. The principal species represented are: Androsina lucasi (never recorded before in Florida) which lives only in the margino-littoral biotopes where the salinity is highly variable; Archaias angulatus and Amphisorus hemprichii which live in the biotopes of the littoral platform but also in those of the interior margin of the bay where the variations of salinity are weak; Cyclorbiculina compressa and Peneroplis proteus which live for the main part in the... |
| Tipo: Text |
Palavras-chave: ATLANTIC; FLORIDA-KEYS; FORAMINIFERA; ECOLOGY. |
| Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/00103/21379/18979.pdf |
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| Levy, A; Mathieu, R; Poignant, A; Fernandezgonzalez, M. |
| The origin of Foraminifera found in continental deposits and endoreic sheets of water poses a problem. This paper presents an inventory of the Foraminifera observed in ancient and recent continental deposits throughout the world. The ecological study of these Foraminifera leads to the differentiation of three groups related to different environments. The first group is indicative of a transitional environment between the margino-littoral area and the continental waters; the second is strictly bound to the margino-littoral biotope; and the third is marine, with a few species capable of tolerating a variable salinity. The presence of some Foraminifera of the last group in the endoreic environments is discussed and leads to the hypothesis that their setting... |
| Tipo: Text |
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| Ano: 1995 |
URL: http://archimer.ifremer.fr/doc/00097/20856/18517.pdf |
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| Levy, A. |
| Archaias angulatus is a soritid species found in abundance on littoral intertropical carbonate platforms. In the margino-littoral euryhaline biotopes, wedged in the neighbouring littoral marine environment, lives a distinct but similar form: Androsina lucasi. As the latter cannot migrate by sea or be transported by birds or fish, it cannot have been derived phylogenetically from an ancestral species before colonizing this wedged habitat in space and time. Only the idea of a reiterated phenomenon of speciation induced by the environment from another littoral species (Archaias angulatus) can explain its noticeable ubiquity in margino-littoral biotopes isolated from one another but each in contact with the biotopes favoured by Archaias angulatus. This... |
| Tipo: Text |
Palavras-chave: PROTOZOA; LARGER FORAMINIFERA; SPECIATION; ECOLOGY; PHYLOGENY. |
| Ano: 1994 |
URL: http://archimer.ifremer.fr/doc/00098/20895/18509.pdf |
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