Search results for "Conch"
showing 9 items of 19 documents
Le conchiglie di Lamarck come beni culturali
2012
Con questo contributo si è voluto ricordare che nella turbolenta Francia nel 1793 per la prima volta i beni naturali vengono ufficialmente riconosciuti anche come beni culturali facenti parte del patrimonio di un popolo, che li deve custodire e tutelare. Il tutto era scaturito dalla necessità di salvare dalla distruzione due acquasantiere costituite da 2 valve di tridacna, una conchiglia esotica, presenti nella Chiesa di S. Sulpice a Parigi. A questo importante evento partecipò attivamente anche Jean Baptiste Lamarck, Professore di Zoologia degli Insetti e dei Vermi presso il Museo Nazionale di Storia Naturale di Parigi. Proprio dallo studio delle conchiglie attuali, comparate con quelle fo…
El uso de conchas marinas como soporte de útiles pulimentados: una pieza recuperada en Costamar (Castellón)
2013
[EN] The uniqueness of a polished tool discovered from the Neolithic levels of the prehistoric site of Costamar (Castellón, Spain) raised a detailed analysis both the nature of the support, which has been identified as a sea shell concerning the species Spondylus gaederopus, as well as traces of use preserved at the edge that allows us to define the tool as an adze.
Dažādu diagnostikas metožu salīdzinājums pacientiem ar strukturālu deguna obstrukciju pirms operācijas un astoņas nedēļas pēc operācijas
2016
Mana diplomdarba mērķis ir salīdzināt četras dažādas deguna izmeklēšanas metodes, kas tiek lietotas deguna obstrukcijas novērtēšanai pacientiem ar strukturālu deguna obstrukciju pirms operācijas un astoņas nedēļas pēc operācijas. Pacienti tika sadalīti divās grupās: ar deguna starpsienas deviāciju un apakšējās deguna gliemežnīcas hipertrofiju, un ar deguna starpsienas deviāciju un vidējās deguna ejas nosprostojumu bullozas deguna gliemežnīcas dēļ. Darba mērķi: Noskaidrot, kura no pētījumā izmantotajām metodēm ir klīniskajā praksē lietojama un visinformatīvākā, kā arī vai pastāv saistība starp pētījumā izmantotajām diagnostikas metodēm kopumā. Materiālu un metodes: Pētījumā piedalījās 20 dal…
Embryonic Ammonoid Shell Features: Intraspecific Variation Revisited
2001
Two samples of ammonoids belonging to the Oppeliidae, Sublunuloceras virguloidesHecticoceras (Brightii) canaliculatum, are analyzed to estimate the intraspecific variability of embryonic shell features. The study of embryonic shell characters reveals two main shapes of protoconch, flattened and round. Prosiphons may be straight or slightly curved. New parameters for area are added to the linear parameters commonly found in the literature. Prosiphon length and caecum area vary greatly whereas protoconch and ammonitella diameter vary only slightly, and the ammonitella angle is almost constant. The protoconch-to-ammonitella size ratio behaves differently in each species, suggesting different p…
KYLLINIA PARENTALIS (NEOGASTROPODA: TURRIDAE), NEW GENUS AND SPECIES FROM THE PLIO–PLEISTOCENE OF THE CENTRAL MEDITERRANEAN AREA
2007
Abstract A new genus and species of turrid neogastropod, Kyllinia parentalis, is described based on three shells from the Pliocene (North Italy) and the Pleistocene (northwestern Peloponnesus) of the central Mediterranean area. The new taxon is compared to the buccinid (sensu lato) genus Metula H. and A. Adams, 1853 with which it shows a few superficial similarities mainly limited to the latticed sculptural pattern of the teleoconch. Kyllinia parentalis is placed in the turrid subfamily Mangeliinae on the basis of teleoconch characters (double sinuosity of the outer lip and the short, forward curved anterior canal) and protoconch (a characteristic pattern formed by narrow axial riblets givi…
An unusual conchorhynch from the upper Maastrichtian of the southeast Netherlands and the distinction between nautiloid and ammonoid conchorhynchs (M…
2022
Abstract A single, atypical conchorhynch (calcitic tip of a cephalopod lower jaw), recovered from the uppermost Meerssen Member (Maastricht Formation, upper Maastrichtian) at the former ENCI-HeidelbergCement Group quarry, south of Maastricht, is described as a new parataxon, Conchorhynchus illustris sp. nov. The specimen can be differentiated from all previous conchorhynch records on account of its large size, elongated shape and, in particular, of the structure of its apical part which is smooth and forwardly elongated. During the Late Cretaceous, conchorhynchs formed part of the jaw apparatus of nautilids and of two ammonoid suborders, Phylloceratina and Lytoceratina. Since conchorhynchs …
Une autre collection de mulettes de Drouët à l'université de Bourgogne : la collection "Henri Miot".
2014
4 pages; National audience
The playa environments of the Lodève Permian basin (Languedoc-France).
2008
28 pages; International audience; The Lodève Permian synrift sequence is represented by thick stacked climate-controled playa cycles which have been constrained by structural, sedimentological, geochemical and paleontological processes. The present paper merges the different results in order to better constrain the dynamics and palaeoecologycal evolution of the playa system from Late Cisuralian to Early Lopingian time. In this depositional environment, thining upwards sheet-flood sequences represent flooding events; they are relayed by ephemeral ponding, suspension settling and limited carbonate precipitation accompanied by large amounts of shallow to subaerial sedimentary structures (curre…
Concheros del sur de Iberia en el límite Pleistoceno-Holoceno
2013
El núcleo de yacimientos costeros pleistocenos de la costa de Málaga permite valorar los cambios técnicos y económicos ocurridos en el tránsito Pleistoceno-Holoceno, lo que actualiza una discusión abierta por F. J. Fortea: la relación entre el Magdaleniense y el Epipaleolítico en la región mediterránea ibérica. Estos yacimientos constituyen una documentación decisiva para el conocimiento del uso de los recursos marinos durante el Paleolítico europeo. The concentration of coastal Pleistocene sites along Malaga’s coast allows us to study the technical and economical changes which occurred during the Pleistocene-Holocene transition and thereby to update an open discussion begun by…