A5010407518- Echinoderm biology and ecology
- Marine and coastal plant biology
- Marine Biology and Ecology Research
- Paleontology and Stratigraphy of Fossils
- Paleontology and Evolutionary Biology
- Ocean Acidification Effects and Responses
- Methane Hydrates and Related Phenomena
- Evolution and Paleontology Studies
- Geological and Geophysical Studies
- Ichthyology and Marine Biology
- Coral and Marine Ecosystems Studies
- Spacecraft and Cryogenic Technologies
- Geology and Paleoclimatology Research
- Marine Bivalve and Aquaculture Studies
- Geological formations and processes
- Biomedical Text Mining and Ontologies
- Inorganic Fluorides and Related Compounds
- Genomics and Phylogenetic Studies
- Plant Diversity and Evolution
- Maritime and Coastal Archaeology
- Cephalopods and Marine Biology
- Marine and environmental studies
- Fossil Insects in Amber
- Offshore Engineering and Technologies
- Geological Studies and Exploration
Musée National d'Histoire Naturelle
2015-2024
Gobierno del Principado de Asturias
2023
Taizhou University
2020
University of Göttingen
2010-2018
American Museum of Natural History
2014
University of Tübingen
2008
A new marine fossil assemblage from the Early Triassic shows unexpected phyletic diversity and functional complexity.
Ophiuroid systematics is currently in a state of upheaval, with recent molecular estimates fundamentally clashing traditional, morphology-based classifications. Here, we attempt long overdue recast morphological phylogeny estimate the Ophiuroidea taking into account latest insights on microstructural features arm skeleton. Our final based total 45 ingroup taxa, including 41 species covering full range extant ophiuroid higher taxon diversity and 4 fossil known from exceptionally preserved...
A new classification of Ophiuroidea, considering family rank and above, is presented. The superfamily taxa in O’Hara et al. (2017) were proposed to ensure a better readability the phylogeny but are unavailable under provisions ICZN. Here, morphological diagnoses all 33 families five superfamilies provided. Ten families, Ophiosphalmidae fam. nov., Ophiomusaidae Ophiocamacidae Ophiopteridae Clarkcomidae Ophiopezidae Ophiernidae Amphilimnidae Ophiothamnidae nov. Ophiopholidae described....
Lateral arm plates, the spine-bearing plates of ophiuroid skeleton, have long been assumed to display sufficient morphological diversity be used for species identifications in micropalaeontology. As a consequence, many new brittle-star described on basis isolated fossil lateral plates. A substantial lack information variability respect taxon concepts, however, has led increasing confusion over limits and excessive extensions stratigraphic ranges. In this study, we therefore performed...
Hypotheses on the age and possible antiquity of modern deep-sea fauna put forward to date almost all agree assumption that is largely result colonisation from shallow-water environments. Here, fossil record Ophiacanthidae, a brittle star family with extensive occurrences at shelf depths, systematically traced against calibrated phylogeny. Several lines evidence suggest Ophiacanthidae originated greatly diversified in deep sea, most extant clades having diverged by end Triassic latest. During...
The Late Jurassic–Early Cretaceous Slottsmøya Member of the Agardhfjellet Formation in central Spitsbergen has yielded two new species asteroids and ophiuroids, one which is described as new. Polarasterias janusensis Rousseau & Gale gen. et sp. nov. a forcipulatid neoasteroid with elongated arms, small disc very broad ambulacral grooves narrow adambulacrals. Savignaster septemtrionalis pterasterid well-developed interradial chevrons. specimens are first articulated material reveal...
Identifiable remains of large deep-sea invertebrates are exceedingly rare in the fossil record. Thus, every new discovery adds to a better understanding ancient environments based on direct evidence. Here we describe collection dissociated skeletal parts ophiuroids (brittle stars) from latest Pliocene earliest Pleistocene Sicily, Italy, preserved as microfossils sediments deposited at shallow bathyal depths. The material belongs previously unknown species ophiacanthid brittle star,...
The origin and possible antiquity of the spectacularly diverse modern deep-sea fauna has been debated since beginning research in mid-nineteenth century. Recent hypotheses, based on biogeographic patterns molecular clock estimates, support a latest Mesozoic or early Cenozoic date for key groups present (echinoids, octopods). This relatively young age is consistent with hypotheses that argue extensive extinction during Jurassic Cretaceous Oceanic Anoxic Events (OAEs) mid-Cenozoic cooling...
Teleosauroids were a clade of semi-marine crocodylomorphs that attained near-global distribution during the Jurassic Period. They particularly common Toarcian (Early Jurassic) and are well documented throughout UK Germany. However, teleosauroids discovered in Luxembourg have been little studied rarely discussed scientific literature. Here we present comprehensive catalogue thalattosuchian specimens, including nine (all from Toarcian) five Thalattosuchia indeterminate (four one Bajocian),...
Owing to the assumed lack of deep-sea macrofossils older than Late Cretaceous, very little is known about geological history communities, and most inference-based hypotheses argue for repeated recolonizations deep sea from shelf habitats following major palaeoceanographic perturbations. We present a fossil assemblage echinoderms, gastropods, brachiopods ostracods, Early Jurassic Glasenbach Gorge, Austria, which includes oldest representatives number extant groups, thus implies that in situ...
The Lower Triassic fossil record of brittle stars is relatively rich, yet most records published to date are based on poorly preserved or insufficiently known fossils. This hampers exhaustive morphological analyses, comparison with recent relatives inclusion Early ophiuroid taxa in phylogenetic estimates. Here, we describe a new from the Nevada, as phosphatized skeletal parts and assigned taxon Ophiosuperstes praeparvus gen. et sp. nov Maxwell, V. Pruss. S.B. unusual preservation fossils...
Even though a handful of long-lived reptilian clades dominated Mesozoic marine ecosystems, several biotic turnovers drastically changed the taxonomic composition these communities. A seemingly slow paced, within-geological period turnover took place across Early–Middle Jurassic transition. This saw demise early neoichthyosaurians, rhomaleosaurid plesiosaurians and plesiosauroids in favour ophthalmosaurid ichthyosaurians cryptoclidid pliosaurid plesiosaurians, that will dominate Late and, for...
Abstract Pivotal anatomical innovations often seem to appear by chance when viewed through the lens of fossil record. As a consequence, specific driving forces behind origination major organismal clades generally remain speculative. Here, we present rare exception this axiom constraining appearance diverse animal group (the living Ophiuroidea) single speciation event rather than hypothetical ancestors. Fossils belonging new pair temporally consecutive species brittle stars ( Ophiopetagno...
The emergence of gigantic pliosaurid plesiosaurs reshaped the trophic structure Mesozoic marine ecosystems, and established an ~ 80 million-year (Ma) dynasty macropredatory reptiles. However, timescale their 'defining' trait evolution is incompletely understood because fossil record pliosaurids scarce prior to late-Middle Jurassic (Callovian), 165.3 Ma. Here, we pinpoint appearance large body size robust dentitions early-Middle (Bajocian) from northeastern France Switzerland. These specimens...
Abstract The evolutionary history of the cephalopod order Vampyromorpha with its only recent representative, Vampyroteuthis infernalis , deep-sea vampire squid, is still obscure and a new specimen from Early Jurassic Luxembourg, provides information on vampyromorph morphology at this period. taxon Simoniteuthis michaelyi . gen. n. sp., which based nearly complete gladius associated head–arm complex, morphologically intermediate between families Loligosepiidae Geopeltidae. Interestingly, arm...
Echinoderms are among the marine invertebrates that underwent most severe losses at end-Permian extinction. The prevailing paradigm claims an extreme bottleneck with only very few, if not single, holdovers ("hangovers" herein) sparking post-Paleozoic radiation. Here we identify previously overlooked Triassic echinoids, ophiuroids, and asteroids as unambiguous members of Paleozoic stem groups. These echinoderm hangovers occurred almost worldwide had spread into a wide range paleoenvironments...
Euryalids, which include the spectacular basket stars, form a morphologically aberrant group of brittle stars. Surprisingly, most recent molecular work found them to be sister ophiurid thus challenging traditional dichotomy between euryalids and non-euryalids, leaving an enormous ghost lineage more than 100 million years oldest unambiguous euryalid fossils their predicted divergence from ophiurids during Triassic. Here we examine both previously known newly collected explore evolutionary...
The present paper deals with the systematic description of belemnite assemblages from Lower Jurassic, collected at Roche Blain quarry, Fresney-le-Puceux. In spite reduced thickness succession Fresney-le-Puceux, 13 successive ammonite chronozones could be documented in this rather unique outcrop situation mainland Europe. Twelve genera and 26 species belemnites belonging to Passaloteuthididae, Hastitidae, Megateuthididae, Salpingoteuthididae, family incertae sedis are described illustrated...
Abstract: Two new genera and species of ophiuroid, Inexpectacantha acrobatica gen. et sp. Eirenura papillata gen sp., are described on the basis 39 articulated specimens several hundreds arm fragments isolated skeletal parts. The material was extracted from a lumachellic bed in late early Pliensbachian succession argillites at Sedan, French Ardennes. is unusually well preserved with even finest structures skeleton discernible. Despite exceptionally detailed morphological data extractable...