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Marseille, France

Crocetta F.,Stazione Zoologica Anton Dohrn | Bitar G.,Lebanese University | Zibrowius H.,Le Corbusier 644 | Oliverio M.,University of Rome La Sapienza
Aquatic Biology | Year: 2013

Lebanon (eastern Mediterranean Sea) is an area of particular biogeographic signifi-cance for studying the structure of eastern Mediterranean marine biodiversity and its recent changes. Based on literature records and original samples, we review here the knowledge of the Lebanese marine bivalve biota, tracing its changes during the last 170 yr. The updated checklist of bivalves of Lebanon yielded a total of 114 species (96 native and 18 alien taxa), accounting for ca. 26.5% of the known Mediterranean Bivalvia and thus representing a particularly poor fauna. Analysis of the 21 taxa historically described on Lebanese material only yielded 2 available names. Records of 24 species are new for the Lebanese fauna, and Lioberus ligneus is also a new record for the Mediterranean Sea. Comparisons between molluscan records by past (before 1950) and modern (after 1950) authors revealed temporal variations and qualitative modifications of the Lebanese bivalve fauna, mostly affected by the introduction of Erythraean species. The rate of recording of new alien species (evaluated in decades) revealed later first local arrivals (after 1900) than those observed for other eastern Mediterranean shores, while the peak in records in conjunc-tion with our samplings (1991 to 2010) emphasizes the need for increased field work to monitor their arrival and establishment. Finally, the scarce presence (or total absence) in the most recent samples of some once common habitat-forming species, as well as of some other native taxa, con-firmed their recent rarefaction (or local extinction), possibly related to their replacement by the aliens Brachidontes pharaonis, Spondylus spinosus and Chama pacifica. © Inter-Research 2013. Source


Lindner A.,Federal University of Santa Catarina | Cairns S.D.,Smithsonian Institution | Zibrowius H.,Le Corbusier 644
Zootaxa | Year: 2014

Leptohelia flexibilis gen. nov. et sp. nov., the first stylasterid with a combined calcified and non-calcified skeleton, is described from seamounts and the slope off the islands of New Caledonia, in the southwestern Pacific. The new species is distinguished from all other species of the family Stylasteridae by having a non-calcified organic axis, internal to the basal portion of the calcified corallum. The internal axis is flexible and enclosed by a series of up to 10 calcified annuli, allowing passive lateral bending of the colony. Molecular phylogenetic analyses confirm that Leptohelia flexibilis is a stylasterid coral and reveal that the species is closely related to Leptohelia microstylus comb. nov., a southwestern Pacific stylasterid that lacks an internal axis. Copyright © 2014 Magnolia Press. Source


Crocetta F.,Stazione Zoologica Anton Dohrn | Zibrowius H.,Le Corbusier 644 | Bitar G.,Lebanese University | Templado J.,CSIC - National Museum of Natural Sciences | Oliverio M.,University of Rome La Sapienza
Mediterranean Marine Science | Year: 2013

A review of opisthobranch species from Lebanon (eastern Mediterranean Sea), based on literature records (scattered throughout various papers published over a period of more than 150 years) and recently collected material (1999-2002 within the CEDRE framework and other samples), is presented, yielding a total number of 35 taxa identified to species level. Special emphasis has been placed on alien species, for which scattered notes are also given. The known opisthobranch biota is composed of 22 native (~ 63%), 12 alien (~ 34%) and one cryptogenic (~ 3%) taxa. Eleven of these (Berthella aurantiaca, Berthella ocellata, Aplysia fasciata, Felimare picta, Felimida britoi, Felimida luteorosea, Felimida purpurea, Phyllidia flava, Dendrodoris grandiflora, Dendrodoris limbata and Aeolidiella alderi) constitute new records for the Lebanese fauna, whilst the examined material of a further seven species (Elysia grandifolia, Pleurobranchus forskalii, Aplysia dactylomela, Bursatella leachii, Syphonota geographica, Goniobranchus annulatus, Flabellina rubrolineata), anecdotally cited from Lebanon on the basis of the samples studied here, is explained for the first time. One additional taxon belonging to the genus Haminoea has been identified to genus level only. Source


Crocetta F.,Stazione Zoologica Anton Dohrn | Bitar G.,Lebanese University | Zibrowius H.,Le Corbusier 644 | Capua D.,Vicolo delle Guglie 7 | And 2 more authors.
Spixiana | Year: 2014

The Mediterranean molluscan fauna is widely studied, and is largely considered as the best known in the world. However, mostly due to a severe bias in the geographical samplings, a difference is observed between the knowledge on the central and the western areas and that available for the Levantine Sea. Based on literature reports (spanning over a period of more than 150 years) and extensive fieldwork (altogether covering more than 20 years), a first updated check-list of polyplacophorans, scaphopods and cephalopods from Lebanon (eastern Mediterranean Sea) is provided here. Leptochiton bedullii Dell’Angelo & Palazzi, 1986, Parachiton africanus (Nierstrasz, 1906), Chiton phaseolinus Monterosato, 1879, Lepidochitona caprearum (Scacchi, 1836), Lepidochitona monterosatoi Kaas & Van Belle, 1981 and specimens ascribed to the Sepioteuthis lessoniana Férussac in Lesson, 1831 complex are new records for Lebanon. The occurrence of Alloteuthis subulata (Lamarck, 1798) and Acanthochitona discrepans (Brown, 1827) is excluded as the species records are based on a possible misidentification and a misreading, respectively. For each treated species we present a detailed Lebanese record list, a brief morphological description and its known geographic distribution. Finally, updated Mediterranean check-lists of the three classes are provided. © 2014, Verlag dr Friedrich Pfeil. All rights reserved. Source


Morhange C.,Aix - Marseille University | Marriner N.,University of Franche Comte | Excoffon P.,Service Du Patrimoine Of La Ville Of Frejus And Center Camille Jullian Amu | Bonnet S.,Direction archeologique de la ville dAix en Provence | And 5 more authors.
Geoarchaeology | Year: 2013

Fish tanks become fashionable throughout the Mediterranean area between the 1st century B.C. and the 1st century A.D. Because of this narrow chronological window, and their link to former sea level, they constitute precious archives to investigate relative sea level (RSL) since the Roman period, especially when combined with fossilized marine benthos found attached to the fish tank walls. Here, we present new results from an integrated analysis of a fish tank located in the Roman colony of Fréjus, Southeastern France. The well-preserved biological remains on the fish tank wall allow us to estimate an RSL rise of 40 ± 10 cm at Fréjus since Roman times, consistent with a recently published range of -32 to -58 ± 5 cm for the Northwestern Mediterranean for the same time. By contrast, the findings contradict the ~150 cm of RSL change since Roman times reported for the Northwestern Mediterranean by some authors. © 2013 Wiley Periodicals, Inc. Source

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