Compared to their fossil counterparts, living brachiopods are investigated far less often, due occurrence in remote environments such as dark caves or deep environments. Due the scarcity of studies targeting situ brachiopods’ populations, large-scale information on distribution and ecological preferences is still lacking, especially hardgrounds. The extensive employment remotely operated vehicl...

Daos le secteur nord-oriental du Maroc, les dép6ts littoraux Miocene Supérieur présentent quatre pirncipaux types de biofacies a bryozoaires, en relation étroite avec la nature lithologique sédiment: conglomérats, sables biodétritiques, mames organo-détritiques et calcaires Corallinacées. Une analyse paléoécologique es...

The phylogenetic relationships of the biflagellate protist group Apusomonadidae have been unclear despite the availability of some molecular data. We analyzed sequences from 6 nuclear encoded genes-small-subunit rRNA, large-subunit rRNA, alpha-tubulin, beta-tubulin, actin, and heat shock protein 90-to infer the phylogenetic position of Apusomonas proboscidea Aléxéieff 1924. To increase the taxo...

This paper synthesizes the trophic dynamics of a Canadian arctic marine ecosystem in so far as it is known, using new data on primary production, zooFlankton, the bivalve Mya truncata, and arctic cod (Boreogadus saida), as well as literature values for marine mammals and seabirds. The 98 000 km reglon has a high rate of primary production relative to other parts of arctic Canada. About 60 g Cm-...

BACKGROUND Classification of eukaryotes provides a fundamental phylogenetic framework for ecological, medical, and industrial research. In recent years eukaryotes have been classified into six major supergroups: Amoebozoa, Archaeplastida, Chromalveolata, Excavata, Opisthokonta, and Rhizaria. According to this supergroup classification, Archaeplastida and Chromalveolata each arose from a single ...