Fiche participant :
Nom : Eléaume
Prénom : Marc
Liste des participations aux campagnes accessibles [+] [-]
- CEAMARC-AA
- Campagne scientifique (Sun Dec 16 00:00:00 CET 2007 - Sun Jan 27 00:00:00 CET 2008)
- Sun Dec 16 00:00:00 CET 2007 - Sun Jan 27 00:00:00 CET 2008 Participant (Benthologue, Muséum national d'Histoire naturelle)
- Post campagne
- EVHOE
- Evohe 2009 (Thu Oct 15 15:33:29 CEST 2009 - Sun Nov 29 15:33:36 CET 2009)
- Evohe 2010 (Wed Oct 20 15:33:29 CEST 2010 - Tue Nov 30 15:33:36 CET 2010)
- Wed Oct 20 16:11:57 CEST 2010 - Wed Nov 30 16:11:54 CET 2011 Participant (Benthologue, Muséum national d'Histoire naturelle)
- POKER-4
- Traitement post campagne
- Bentologue, direction scientifique benthos (Benthologue, Muséum national d'Histoire naturelle)
- REVOLTA I
- Chef de mission ( Muséum national d'Histoire naturelle)
- REVOLTA I - hivernage
- Chef de mission ( Muséum national d'Histoire naturelle)
Contributions taxonomiques [+] [-]
Bibliographie (8) [+] [-]
Exporter les bibliographies
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Améziane N., Eléaume M. & Roux M. 2021. Ontogeny of non-muscular brachial articulations in Balanocrininae (Echinodermata, Crinoidea): iterative trajectories or phylogenetic significance?. Zoomorphology 140(1): 47-67. DOI:10.1007/s00435-020-00508-y
Résumé [+] [-]Ontogeny of non-muscular brachial articulations in extant species of Balanocrininae, i.e., Neocrinus decorus, Neocrinus blakei and Hypalocrinus naresianus (Crinoidea, Isocrinida), is described using SEM observations. All three species share embayed synarthries and symplexies (previously only known in crinoid stalks) showing a radiating crenularium pattern in their proximal arms but differ in several important ways. Neocrinus decorus has a shallow simple symmorphy affecting symplexies, and embayed synarthries. During the latest ontogeny of embayed synarthries, irregular syzygial ridges appear on the aboral segment of the fulcral ridge. Neocrinus blakei and H. naresianus share a peculiar sharp deep symmorphy superimposed on symplexies, and synarthries with a more complete single fulcral ridge that only appears late in ontogeny. Comparison with other crinoid taxa that have more advanced arm axial synarthries shows that this ontogenetic trajectory is restricted to paedomorphic stages in extant balanocrinins. An embayed synarthry seems to be derived from the earliest developmental stage of the radiating symplexial crenularium via hypermorphosis of a single crenula. An embayed synarthry is, therefore, a symplesiomorphy based on paedomorphic stage of development; it thus lacks phylogenetic significance, and should be abandoned as a major character in the classification of Isocrinida. The most advanced brachial synarthries shared by distant crinoid taxa mainly represent a homoplasy under morphofunctional constraints. However, they could result from different ontogenetic trajectories, which have only rarely been investigated. Another distinctive articulation feature, the peculiar sharp deep symmorphy observed in extant balanocrinins is a derived character known in a few fossil isocrinids beginning in the Middle Jurassic. We question its phylogenetic significance and suggest that it has developed repeatedly via iterative evolution in Isocrinida. Therefore, because these three extant balanocrinin species share the same ontogenetic trajectories of arm and stalk ligamentary articulations, and differ only in various states of heterochronic development of a few characters, we treat them as belonging to the same genus. We, therefore, consider Hypalocrinus as a junior synonym of the genus Neocrinus.
Campagnes accessibles citées (6) [+] [-]
Codes des collections associés: IE (Échinodermes) -
Dettai A., Adamowizc S.J., Allcock L., Arango C.P., Barnes D.K., Barratt I., Chenuil A., Couloux A., Cruaud C., David B., Denis F., Denys G., Díaz A., Eléaume M., Féral J.P., Froger A., Gallut C., Grant R., Griffiths H.J., Held C., Hemery L.G., Hosie G., Kuklinski P., Lecointre G., Linse K., Lozouet P., Mah C., Monniot f., Norman M.D., O’hara T., Ozouf-costaz C., Piedallu C., Pierrat B., Poulin E., Puillandre N., Riddle M., Samadi S., Saucède T., Schubart C., Smith P.J., Stevens D.W., Steinke D., Strugnell J.M., Tarnowska K., Wadley V. & Ameziane N. 2011. DNA barcoding and molecular systematics of the benthic and demersal organisms of the CEAMARC survey. Polar Science 5(2): 298-312. DOI:10.1016/j.polar.2011.02.002
Campagnes accessibles citées (1) [+] [-] -
Eléaume M., Améziane N. & Chao S.M. 2007. First records of the stalked crinoid fauna (Echinodermata: Crinoidea) of Taiwan. Systematics and Biodiversity 5(4): 435-453. DOI:10.1017/S147720000600226X
Campagnes accessibles citées (1) [+] [-]
Codes des collections associés: IE (Échinodermes) -
Mah C., Neill K., Eléaume M. & Foltz D. 2014. New species and global revision of Hippasteria (Hippasterinae: Goniasteridae; Asteroidea; Echinodermata): Hippasteria revision. Zoological Journal of the Linnean Society 171(2): 422-456. DOI:10.1111/zoj.12131
Résumé [+] [-]A molecular phylogenetic analysis of the genus Hippasteria, rooted against Evoplosoma, has provided the basis for taxonomic revisions and provided insight into the biogeography of a widely occurring, cold-water group of corallivorous asteroids. Herein, we describe three new species, Hippasteria mcknighti sp. nov., Hippasteria muscipula sp. nov., and Hippasteria tiburoni sp. nov., from deep-water settings. Additionally, in light of taxonomic changes, we further elaborate on distribution data for multiple species. Range extensions for Hippasteria phrygiana and Hippasteria californica are included. Discussions about biogeography, cladogenic events, and morphology are also presented.(c) 2014 The Linnean Society of London
Campagnes accessibles citées (6) [+] [-]
Codes des collections associés: IE (Échinodermes) -
Messing C.G., Améziane N. & Eléaume M. 2000. Echinidermata Crinoidea: Comatulid Crinoids of the KARUBAR Expedition to Indonesia. The families Comasteridae, Asterometridae, Calometridae and Thalassometridae, in Crosnier A.(Ed.), Résultats des campagnes MUSORSTOM 21. Mémoires du Muséum national d'Histoire naturelle 184:627-702, ISBN:2-85653-526-7
Résumé [+] [-]Fifteen species of comatulid crinoids in eleven genera and four families collected in 180-800 m by the joint French-Indonesian KARUBAR Expedition to the Kai and Tanimbar Islands, Indonesia (October 1991), are described in detail. The specimens represent the most important collection of bathyal comatulids from the East Indies in the second half of the twentieth century. The material described herein comprises four species of Comasteridae, one Asterometridae, two Calometridae and eight Thalassometridae. One species of calometrid (Neometra xenocladia sp. nov.) is described as new. FiveTpecies are recorded for the first dme since they were originally collected. Four thalassometrids (Aglaometra valida, Oceanometra annandalei, Cosmiometra philippinensis and Stenometra cristata) together account for 75% of identified specimens, reflecting this family's importance to the outer shelf-upper bathyal comatulid fauna of the tropical Indo-Western Pacific. The substantial amount of material of several species, notably A. valida and O. annandalei, permits a better understanding of morphological variability than previously. Statistical analyses of several sipposedly diagnostic characteristics including aspects of calyx form and number of cirri, reveal substantial variation. We place several taxa in sinonymy as a result. SIM studies of different ossicles have been made for the first time for A. valida and O. annandalei. The preliminary results show that great morphological differences exist within the family. Three species (Stiremetra breviradia, Palaeocomatella hiwia and Cosmonuetra iole) are recorded from Indonesian waters for the first time. Moreover, most of the KARUBAR comatulids represent geographical and bathymetrical range extensions.
Campagnes accessibles citées (2) [+] [-]
Codes des collections associés: IE (Échinodermes) -
Roux M., Eléaume M., Hemery L.G. & Améziane N. 2013. When morphology meets molecular data in crinoid phylogeny: a challenge. Cahiers de Biologie marine 54: 541-548
Résumé [+] [-]The extant crinoid fauna results from more than 485 Myr of evolution (from Early Ordovician). Detailed morphological studies on extant crinoids document large intraspecific variations, strong changes through ontogeny with various mosaics of heterochronic development, and adaptive characters which depend on environment, mainly hydrodynamics and food supply. The importance of paedomorphy and morphological convergences (homoplasies) in crinoid evolution is confirmed by studies using DNA markers, and makes difficult the use of cladistic methods of phylogenetic reconstructions. Many clades of extant crinoids based on external skeleton morphology are polyphyletic. Using the hyocrinids and a recent extensive molecular phylogeny of the extant crinoids, we show that the molecular approach, when coupled with detailed ontogenetic analyses on a large sample of specimens and taxa, may help understand the evolutionnary trends within a given group of organisms. Purely molecular or phenotypic analyses produce contrasting results because these analyses work at scales that are separated by a strong gap. We propose a deep reappraisal of the relationships between extant and fossil taxa using the concept of onto phylogeny which rejects the classical separation between ontogeny and phylogeny and argues that natural selection acts at every level of integration of the organism from DNA, cells, tissues, to the individuals and populations.
Campagnes accessibles citées (9) [+] [-]ATIMO VATAE, BIOPAPUA, BORDAU 2, MIRIKY, NORFOLK 1, PANGLAO 2005, SALOMON 1, SALOMON 2, SALOMONBOA 3
Codes des collections associés: IE (Échinodermes) -
Roux M., Eléaume M. & Améziane N. 2019. A revision of the genus Conocrinus d’Orbigny, 1850 (Echinodermata, Crinoidea, Rhizocrinidae) and its place among extant and fossil crinoids with a xenomorphic stalk. Zootaxa 4560(1): 51. DOI:10.11646/zootaxa.4560.1.3
Résumé [+] [-]Tormocrinus, have yielded arguments for a revision of the taxonomy and interrelationships of extant and fossil taxa in the family Bourgueticrinidae. Conocrinus (= Tormocrinus), as here interpreted, includes six Eocene species: C. thorenti, C. archiaci, C. cahuzaci n. sp., C. duperrieri, C. cf. suessi and C. veronensis. Numerous extinct species previously attributed to Conocrinus or Democrinus are here transferred to two new genera which first occur in the lower Paleocene: Paraconocrinus n. gen. (type species: P. pyriformis) and Pseudoconocrinus n. gen. (type species: P. doncieuxi). Aboral cups from the “Rocher du Goulet” (Biarritz) are here assigned to Paraconocrinus pellati n. gen., n. sp., while the Danian species Democrinus maximus is transferred to Pseudoconocrinus n. gen. A new genus, Cherbonniericrinus, is created to accommodate a single extant species, Ch. cherbonnieri, previously attributed to Conocrinus, while the extant genus Rhizocrinus, closely related to Democrinus, is resurrected. Conocrinus and closely related genera are derived from a bourgueticrinine lineage the first record of which is from the lower Campanian, with the new genus Carstenicrinus. These are all attributed to the family Rhizocrinidae which is here considered distinct from the family Bourgueticrinidae. Rhizocrinids rapidly diversified immediately after the Cretaceous-Paleogene (K/Pg) event. Cretaceous taxa previously placed within the family Bourgueticrinidae now appear to be polyphyletic. Some of them do not belong to Bourgueticrinina, such as those of the Dunnicrinus lineage. Interrelationships of Rhizocrinidae and other post-Palaeozoic families having a xenomorphic stalk are discussed.
Campagnes accessibles citées (2) [+] [-]
Codes des collections associés: IE (Échinodermes) -
Tunnicliffe V., Roux M., Eléaume M. & Schornagel D. 2016. The stalked crinoid fauna (Echinodermata) of the Molucca and Celebes Seas, Indonesia: taxonomic diversity and observations from remotely operated vehicle imagery. Marine Biodiversity 46(2): 365-388. DOI:10.1007/s12526-015-0369-x
Campagnes accessibles citées (1) [+] [-]
Codes des collections associés: IE (Échinodermes)