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Is the Species Flock Concept Operational? The Antarctic Shelf Case
TLDR
The present study contradicts the paradigm that marine species flocks are rare and proposes a new protocol which includes an iterative fine-tuning of the monophyly and endemicity criteria in order to discover unsuspected flocks. Expand
Comprehensive sampling reveals circumpolarity and sympatry in seven mitochondrial lineages of the Southern Ocean crinoid species Promachocrinus kerguelensis (Echinodermata)
TLDR
The phylogeny of Promachocrinus phylogroups reveals two principal clades that may represent two different cryptic species with contrasting demographic histories, suggesting multiple glacial refugia in the Southern Ocean. Expand
Crinoid phylogeny: a preliminary analysis (Echinodermata: Crinoidea)
TLDR
The overall direction of evolution in the gene trees remains uncertain: an asteroid outgroup places the root on the branch adjacent to the slowly evolving isocrinids (consistent with palaeontological order of first appearances), but maximum likelihood analysis with a molecular clock places it elsewhere. Expand
Antarctic Ascidians (Tunicata) of the French-Australian survey CEAMARC in Terre Adélie
TLDR
A large collection of ascidians was made during the CEAMARC Aurora Australis V3 cruise off Terre Adelie and George V Land a region rarely investigated before at these depths, and three of the 33 ascidian species identified are new and belong to the Stolidobranchia. Expand
Artificial Keys to the Genera of Living Stalked Crinoids (Echinodermata)
TLDR
This is the first compilation of such data for all living stalked crinoids since Carpenter (1884) recognized 27 species in six genera in his monograph based on the H.M.S. CHALLENGER Expedition collection. Expand
Biodiversity and historical biogeography of stalked crinoids (Echinodermata) in the deep sea
TLDR
About 95 species of stalked crinoids are now described from 60m to hadal depths, but the knowledge remains far from complete, and it is necessary to have a homogeneous concept for taxonomic units. Expand
Geometric morphometrics of carapace of Macrobrachium australe (Crustacea: Palaemonidae) from Reunion Island
TLDR
The morphometric analysis revealed the occurrence of two morphotypes corresponding to two different types of habitats, suggesting an adaptation to lotic disturbances and is tentatively interpreted as adaptive phenotypic plasticity in amphidromous organisms regressing to freshwaters after a marine larval phase. Expand
DNA barcoding and molecular systematics of the benthic and demersal organisms of the CEAMARC survey.
TLDR
The Dumont d'Urville Sea (East Antarctic region) has been less investigated for DNA barcoding and molecular taxonomy than other parts of the Southern Ocean, such as the Ross Sea and the Antarctic Peninsula, but samples from the Collaborative East Antarctic MARine Census provide new material for phylogeographic and phylogenetic studies in cephalopods, pycnogonids, teleost fish, crinoids and sea urchins. Expand
Environmental control versus phylogenic fingerprint in ontogeny: The example of the development of the stalk in the genus Guillecrinus (stalked crinoids, Echinodermata)
TLDR
A detailed ontogenetic analysis of the stalk of the two species of this Indo‐Pacific genus reveals that the external stalk morphology of Guillecrinus goes from a pronounced xenomorphic type in juveniles, to a dominant homeomorph type in adults, characterized by columnal articulations which allow little or no movement. Expand
When morphology meets molecular data in crinoid phylogeny: a challenge
TLDR
Nous proposons une profonde reinterpretation des relations entre les taxons actuels et fossiles a l'aide d'une methode s'appuyant sur le concept d'ontophylogenese qui refuse la separation classique entre ontogenese and phylogenese and considere that the selection naturelle intervient a chaque palier d'integration of l'organisme depuis l'ADN. Expand
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