Jean-David Moreau

Jean-David Moreau
University of Burgundy | UB · Laboratoire Biogéosciences

PhD

About

69
Publications
20,389
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319
Citations
Citations since 2017
40 Research Items
265 Citations
20172018201920202021202220230102030405060
20172018201920202021202220230102030405060
20172018201920202021202220230102030405060
20172018201920202021202220230102030405060

Publications

Publications (69)
Article
We report a new palaeontological assemblage from the Sakmarian (Early Permian) of Moulin de Latour in the Saint-Affrique Basin (southern France). Pelitic beds show the co-occurrence of arthropod (Diplopodichnus biformis) and tetrapod (Batrachichnus salamandroides and Dromopus lacertoides) tracks with jellyfishes (Medusina atava). Ichnofossils also...
Article
The tetrapod tracksite from Le Bousquet (Permian, Red Sandstone Group from the Rodez Basin, southern France) was discovered during the second half of the 20th century. At this time, the tracksite was only weakly prospected and underestimated. Deposits exposed near Le Bousquet were recently re-investigated. New prospections led to: 1) enlargement of...
Article
The Hirmeriellaceae are an extinct family of Mesozoic conifers. Their foliage has been described in the genera Brachyphyllum , Frenelopsis , Pseudofrenelopsis , etc., while their pollen corresponds to the genus Classopollis , the male cones to e.g. Classostrobus or Tomaxellia and the female scales were named Hirmeriella and Paraucaria , for example...
Article
Taphonomy and mineralization of carbonated wood from the Purbeckian facies of l’Usine, Cherves-Richemont (Charente).
Article
Plants and insects are the two dominant groups in terrestrial ecosystems, and insect damage on fossil plants is the only direct evidence documenting the past ecological history between these two, hyperdiverse groups. We describe, analyze, and interpret plant–insect interactions of a lower Cenomanian paleoforest from western France – the Puy-Puy Qua...
Article
During the 20th century, the first dinosaur tracks of the Causses Basin were identified at Saint-Laurent-de-Trèves, in the Parc National des Cévennes (southern France). A recent excavation reveals a new theropod tracksite in the Hettangian deposits from Le Mazel, 2 km from the historical tracksite at Saint-Laurent-de-Trèves. The tracks are here des...
Article
Since the 1980s, the Upper Jurassic lithographic limestone of the Causse Méjean (southern France) has been known by local naturalists to yield fossils. However, until the beginning of the 21st century, this plattenkalk remained largely undersampled and scientifically underestimated. Here, we present the results of two decades of prospection and sam...
Article
Premise: The conifer Geinitzia reichenbachii was a common member of the Cretaceous Laurasian floras. However, the histology of G. reichenbachii leafy axes was never described in detail, and our knowledge of its paleoecology remains very limited. Using new and exquisitely preserved silicified material from the Upper Cretaceous of western France, we...
Article
Depuis 1999, des découvertes fortuites ainsi que des campagnes de prospections menées en Lozère ont livré plusieurs sites à empreintes de pas de dinosaures d’âge jurassique moyen. Le nombre, la diversité et la remarquable préservation de ces traces constituent un patrimoine paléontologique exceptionnel. Les sites principaux sont localisés dans les...
Article
We report the first Hettangian theropod tracksite (~200 Ma) yielding a rich accumulation of plant remains from the Bleymard Strait (southern France). It constitutes an excellent opportunity to reconstruct lowermost Jurassic ecosystems hosting dinosaurs and which are still poorly documented in this area. Two morphotypes of tridactyl tracks are disti...
Article
In 2013, Andra (French National Radioactive Waste Management Agency) drilled boreholes to the south-east of the Paris Basin, to characterise Aptian and Albian clayey formations, including the ‘Argiles à Plicatules’ Formation dated as early Aptian. One of these boreholes intersected this formation with an excellent recovery allowing detailed biostra...
Article
A recent excavation yielded 118 large tridactyl footprints in the Lower Jurassic Dolomitic Formation of the Causses Basin, at Mongisty in southern France. Most of the tracks are ascribed to Eubrontes giganteus Hitchcock, 1845. They are preserved on a surface of 53 m ² and form parallel rows with a preferential orientation towards the north. Such an...
Article
Full-text available
A new Cenomanian amber-and plant-bearing deposit has been discovered at Neau, in the Mayenne department (France). The Cenomanian fossiliferous lignites are located in karst filling in a substratum of Cambrian limestones. The amber corresponds mainly to tiny millimetric grains, devoid of arthropod inclusions, but rich in microorganisms, especially t...
Article
Coarse-grained sediments deposited in high-energy environments are usually considered unfavorable to the preservation of fossil tracks. Here we report dinosaur footprints showing good physical preservation, despite being found in coarse-grained sandstones of alluvial origin from the Upper Triassic of Ardèche, southeastern France. The ichnoassemblag...
Article
Full-text available
A new ichnofauna from the Permian of Morocco is described in details: it is the first Palaeozoic ichnofauna from the Zat Valley in Marrakech High Atlas. The new tracksite was found in the Tighdouine region, in the middle-upper Permian of the Cham-el-Houa Siltstone Formation. An abundant and diverse ichnoassemblage composed of both protostomian (pro...
Article
The Puy-Puy quarry at Tonnay-Charente (Charente-Maritime, SW France) is a sand quarry exposing a 9-m-thick series of latest Albian–earliest Cenomanian (mid-Cretaceous) age. The uppermost Albian deposits consist of lignitic clay containing fossiliferous amber. The lowermost Cenomanian sand deposits alternate with clay intercalations containing plant...
Article
Full-text available
Fossil inclusions of arthropods and microorganisms are abundant in the Cretaceous amber from western France, but plant meso- or macroremains are scarce. Preserved remains are mostly tiny, very fragmented, and indeterminable. Only one amber locality in the Charente department has already provided conifer remains. Here, we report the first plant meso...
Article
Although the deep galleries of natural underground cavities are difficult to access and are sometimes dangerous, they have the potential to preserve trace fossils. Here, we report on the first occurrence of sauropod dinosaur tracks inside a karstic cave. Three trackways are preserved on the roof of the Castelbouc cave 500 m under the surface of the...
Article
Ants exhibit a plethora of ecological interactions with terrestrial plants. These interactions are broadly surveyed in modern ecosystems, but are much more difficult to unveil in the fossil record. Here, we report a unique ant–conifer association preserved in an opaque piece of 100‐million‐year‐old amber from Charentes in Western France, revealed b...
Article
Fragments of filled wood‐borings were recently discovered from the Eocene–Oligocene Conglomerate and Sandstone Formation of the Malzieu Basin (Lozère, southern France). Propagation phase‐contrast X‐ray synchrotron microtomography (PPC‐SRμCT) was used to characterize their hidden inner structures. Virtual 2D sections and 3D reconstructions show that...
Article
The Late Pennsylvanian deposits of the Graissessac Basin (southern France) are well known for their abundant and diversified plant remains. Here we report on seven trackways of giant millipede-like arthropods recently discovered from two surfaces. These traces are ascribed to Diplichnites cuithensis. The trackways are up to 200 cm long, up to 36 cm...
Article
Full-text available
A new vertebrate ichnological assemblage is described from the Hettangian Dolomitic Formation of the Causses Basin, at Le Serre (Lozère, southern France). We report tracks that complement the poor fossil record of lowermost Jurassic crocodylomorphs in Europe. Tetradactyl pes and pentadactyl manus imprints form a unique trackway. Traces are ascribed...
Article
Full-text available
Au cours du XXe siècle, la majorité des sites à plantes fossiles (Hettangien–Sinémurien) de la ville de Mende ont disparu à cause d’une importante urbanisation ou bien sont tombés dans l’oubli. Cet article présente une synthèse des gisements à végétaux fossiles, depuis leur découverte au XIXe siècle jusqu’aux campagnes de prospection récentes. De n...
Article
Full-text available
A sandstone slab bearing plant macro-remains was rediscovered during recent investigations led in the buildings of the old Musée Ignon-Fabre (Mende) which were closed in 1995 and emptied in 2003. The study of the slab clearly allows it to be identified as the holotype of Weltrichia fabrei Saporta, 1891 which has been considered destroyed since the...
Article
Full-text available
Three new localities yielding fossiliferous flints are reported from the Châtellerault area (Vienne, western France). They include one archaeological site (La Grande Vallée) and two zones with alterite deposits (L'Aunas and Les Bariollières). Broken surfaces of flint nodules show co-occurrence of marine invertebrates such as bryozoans, echinoids (M...
Article
Résumé Deux sites à traces de pas tridactyles II–IV de théropodes et de « probables » sauropodes des Grands Causses, sommairement décrits en 2006, sont ici réétudiés. Il s’agit des sites du Capelan (commune de Meyrueis, Lozère) et de la Garène (commune de La Roque-Sainte-Marguerite, Aveyron), tous deux d’âge Bathonien. En 2012, l’un d’entre eux (Le...
Article
Full-text available
Although underground dinosaur tracksites inside anthropic cavities such as mines or tunnels are well-known throughout the world, footprints inside natural karstic caves remain extremely rare. The Malaval Cave (Lozère, southern France) is well-known by speleologists for the abundance and the exceptional quality of acicular and helictite aragonite sp...
Article
Full-text available
Over recent decades, diverse structures ascribed to angiosperms, bennettitaleans, conifers, cycads, ginkgophytes and pteridosperms have been reported from the Cretaceous deposits of the Aquitaine Basin (southwestern France). However, Albian macrofloras remain uncommon in Aquitania as well as in France. The clay from the Archingeay-Les Nouillers qua...
Article
A Cenomanian clay lens in Hucheloup Quarry (Maine-et-Loire, north-western France) has yielded 82 foliar compressions and impressions, of which 62 were identified at several taxonomic levels. The plants are ascribed to diverse Pinales (27%), ferns (27%), Ginkgoales (26%), angiosperms (19%) and Cycadales (1%). The most abundant species in the assembl...
Book
Full-text available
Disparus il y a près de 65 millions d'années, les dinosaures fascinent petits et grands, amateurs et scientifiques. Cependant, ces « terribles lézards » suscitent encore aujourd'hui beaucoup d'interrogations. C'est notamment le cas des dinosaures qui peuplaient l'Aveyron et la Lozère il y a 200 millions d'années, au Jurassique inférieur. Les osseme...
Article
A new dinosaur tracksite was recently discovered in the Upper Jurassic deposits from the Oléron Island (Atlantic Ocean, western France). Tracks are located along the coastline in the tidal area of La Morelière near “Pointe de Chassiron”. They were observed in situ in an evaporitic interval from the “Purbeck beds” Unit. Sediments consist of calcite...
Article
Depuis la fin du XXe siècle, le site paléontologique d’Archingeay-Les Nouillers (Charente-Maritime, Ouest de la France) continue de livrer des méso- et macrorestes végétaux d’âge Albien-Cénomanien (environ 93–113 millions d’années). Les campagnes de fouilles successives ont fourni de très nombreux spécimens utiles à la reconstitution des écosystème...
Article
Background and Aims. Terrestrial plant remains in fossilized tree resin are relatively common. However, histology and preservation of plants entombed in Cretaceous ambers remain poorly known. We report an exquisitely preserved conifer leafy axis from 100-million-year-old opaque amber of western France that is assignable to Glenrosa carentonensis Mo...
Article
Full-text available
Tufas bearing plant macroremains are uncommon in the Causses Basin (southern France). Here, we report a new fossiliferous tufa deposits at Mende, in Lozère. This palaeontological site is the first Quaternary tufa from the northern part of the Causses Basin that yields such an abundance of plant macroremains. The radiocarbon dating shows that these...
Article
Spherical flower heads have often been reported from the late Early and Late Cretaceous of Asia and North America, but are rare in Europe. Palaeobotanists have included them in Altingiaceae and Hamamelidaceae (Saxifragales, basal core eudicots), and Platanaceae (Proteales, basal eudicots). We report newly collected flower heads from the Cenomanian...
Article
Des accumulations de silex particulièrement fossilifères ont été découvertes en gisements de surface sur la commune de Claix, en Charente (SO France). Ces silicifications proviennent, d’une part, d’altérites ou de calcaires à silex, d’autre part, de stations paléolithiques et néolithiques. Une partie de ces silex, de teinte beige à brune, est riche...
Article
Inflorescences of Mauldinia (Lauraceae) are described from the middle Cenomanian Pauletian facies of Gard, Languedoc-Roussillon, south-eastern France. This is the first record of the genus from this part of Europe. Mauldinia sp. is described based on peduncles and lateral units. Isolated, slender peduncles show spirally arranged scars or rarely att...
Article
Full-text available
A new Late Jurassic flora was discovered in the fossiliferous lithographic limestone of the Causse Méjean, Lozère (southern France). It consists of the first Kimmeridgian/Tithonian plants from this area. Fossil plants are represented by megaremains preserved as impressions. This flora shows a co-occurrence of terrestrial plants and marine algae. Th...
Article
Full-text available
Des accumulations de silex particulièrement fossilifères ont été découvertes en gisements de surface sur la commune de Claix, en Charente (SO France). Ces silicifications proviennent, d’une part, d’altérites ou de calcaires à silex, d’autre part, de stations paléolithiques et néolithiques. Une partie de ces silex, de teinte beige à brune, est riche...
Book
Full-text available
Hammatoceras, Harpoceras, Hildoceras, Lytoceras, Phylloceras… autant de noms d’ammonites qui vous paraissent peut-être étrangers ? Grace à ce manuel, apprenez à les reconnaître, afin d’apprécier la diversité de ces animaux qui peuplaient les fonds marins du Jurassique, il y a 180 millions d’années. Avec 29 genres et 80 espèces représentés, ainsi q...
Article
Full-text available
We report exceptionally well-preserved plant remains ascribed to the extinct conifer Glenrosa J. Watson et H.L. Fisher emend. V. Srinivasan inside silica-rich nodules from the Cenomanian of the Font-de-Benon quarry, Charente-Maritime, western France. Remains are preserved in three dimensions and mainly consist of fragmented leafy axes. Pollen cones...
Conference Paper
La présence de silex à plantes à Arc-en-Barrois (Fig. 1) a été évoquée initialement dans la première moitié du XXème siècle par E. Bruet dans sa thèse (1932) et deux de ses articles ultérieurs (1933a, 1933b). Faute de moyens techniques, l’étude de la flore en était restée à une liste sommaire jamais révisée (Bertrand in Bruet, 1932). Néanmoins, ell...
Thesis
Full-text available
La transition Crétacé inférieur-Crétacé supérieur (environ 100 millions d’années) marque une période cruciale pour l’évolution de certaines plantes à graines. Elle correspond à la rapide radiation des plantes à fleurs et à la réorganisation écologique des Angiospermes et des conifères. Cependant, notre connaissance des plantes à graines durant le C...
Article
Full-text available
Recent ichnological studies revealed two new localities showing dinosaur footprints in the Hettangian Dolomitic Formation from the Causses Basin, southern France. The traces are reported from the northern part of the basin, in Lozère, an area where Lower Jurassic dinosaur ichnites were poorly documented. The surfaces bearing footprints are characte...
Article
Deposits containing silica-rich nodules were recently collected from the Font-de-Benon quarry, between Archingeay and Les Nouillers, Charente-Maritime, western France. Nodules contain diverse fossil inclusions such as conifers, urchins, foraminifers and sponge spicules. Cenomanian deposits were transformed during the Eocene-Oligocene by a delayed s...
Article
Des dépôts contenant des nodules siliceux ont récemment été mis au jour dans la carrière de Font-de-Benon, entre Archingeay et Les Nouillers, Charente-Maritime, Ouest de la France. Ces silex contiennent diverses inclusions fossiles, telles que des conifères, des oursins, des foraminifères et des spicules d’éponges. Les dépôts d’âge Cénomanien ont é...
Article
Here, we report flint nodules bearing fossil plant inclusions from the early Cenomanian of the Font-de-Benon sand quarry, between the villages of Archingeay and Les Nouillers, Charente-Maritime, western France. The broken-open surfaces of these dense siliceous rocks only partly show the whole diversity, which is established using a non-destructive,...
Article
Full-text available
A multiscale approach combining phase-contrast X-ray micro- and nanotomography is applied for imaging a Cretaceous fossil inflorescence in the resolution range from 0.75 μm to 50 nm. The wide range of scale views provides three-dimensional reconstructions from the external gross morphology of the inflorescence fragment to the finest exine sculpture...
Article
Full-text available
A multiscale approach combining phase-contrast X-ray micro-and nanotomography is applied for imaging a Cretaceous fossil inflorescence in the resolution range from 0.75 mm to 50 nm. The wide range of scale views provides three-dimensional reconstructions from the external gross morphology of the inflorescence fragment to the finest exine sculptures...
Conference Paper
Full-text available
During the last years, the propagation phase-contrast X-ray microtomography (PPC-SRµCT) was demonstrated as a non-destructive and powerful technique in the investigation of fossils, particularly in palaeoanthropology, palaeoentomology and palaeohistology. However, this technique was poorly experimented in palaeobotany. We study experimentally the m...
Article
Along the southern crystalline border of the Rouergue, the detrital Sandstones-variegated Mudstones Formation and the Dolomitic Formation yields numerous dinosaur footprints from the Earliest Hettangian. Among the 25 sites distributed along the 40 km-long transect between Marcillac-Vallon and Saint-Geniez-d'Olt, two of them, Puech de Castres and Le...
Article
Full-text available
A new locality with Bathonian dinosaur footprints (Middle Jurassic) was discovered in the gorges of the Jonte river (Lozère, France). Two trackways and two isolated traces are described. Preliminary morphologic and biometric studies seem to show that Gayrand's footprints are different from the other ichnites present in the Hettangian/ Sinemurian of...

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Projects (3)
Project
Investigation of Albian-Cenomanian amber deposits from the Charentes region, southwestern France: characterization of the plant source, amber taphonomy, systematics of organismal inclusions, paleoenvironment.
Project
This research project focused on the reconstruction of Jurassic coastal ecosystems from the Causses Basin (southern France) using sedimentology, plant remains (cuticles, wood, pollen) as well as vertebrate/invertebrate trackways (e.g. dinosaur/crocodylomorph tracks).