Les crustaces decapodes du Cenomanien de Navarra (Espagne):Premiers resultats de l'etude des Galatheidae

Preceded by a short report on the fauna associated with Decapods in the Cenomanian from Orobe and by historical references, this note is an account on the results obtained after elaborate study of 187 specimens of Anomura belonging to Galatheidae family. Those results allow the systematic delimitation of two genera: ParagalatheaPATRULIUS, 1960 and Eomunidopsis n. gen., which produce the revision of 5 species belonging to those two genera. A provisional determination of the rest of the material (14 Brachyurans), still under consideration, is proposed.     

Isoenzymes de l'anhydrase carbonique d'un poisson euryhalin: Variations en relation avec l'osmoregulation

A chemical study of carbonic anhydrase (EC 4.2.1.1) from the red blood cells and the gills of an euryhaline fish (Anguilla anguilla) is presented. Animals adapted to fresh water were compared to those adapted to sea water.The physicochemical constants of the various molecular forms isolated by chromatograhy and isoelectric focusing were determined; isoeleletric pH, molecular weight, and the K_m and V/E of the enzyme dehydration activity were compared.In both red cells and gills of fish adapted in either media various forms were isolated, characterized by different enzymatic kinetics (high- and low-activity forms) but having the same molecular weight (27 250). Some isoenzymes isolated from the gills differed significantly from those isolated from the red cells.Adaptation to fresh water or sea water is accompanied by modifications in the distribution of yhe isoenzymes in both red cells and gills: adaptation to sea water is characterized by a shift of the molecular forms towards an isoelectric pH higher than pH = 6.The role of these enzymes is discussed under both a physiological and biochemical point of view in relation to the electrolyte exchange across fish gill. The origin of the different molecular forms of the carbonic anhydrase is discussed in relation to the prevailing theories on this subject.     

Du probleme de l'origine des Dinosauriens d'apres les donneesde l'ichnologie du Trias

With the data of the osteological paleontology and these of the ichnology, the authors attempt to restore the biotopes where lived the trackmakers, biotopes which have favoured in the Triassic the evolution and the expansion of the Archosaurs, the specialized Reptiles in the easy and rapid locomotion. They pointed out that the chirotheroid footprints cannot be attributed at all events to the Pseudosuchians and they come to the conclusion that Dinosaurs and Pseudosuchians, as separated groups, are appeared as early as the lower Triassic.     

Sur les conditions de gisement de l'ichthyofaune oligocene d'Aix-en-Provence (Bouches-du-Rhone): Essai de definition d'un modele paleoecologique et paleogeographique

The study of the fossil fishes preserved in 19 successive fossiliferous beds sampled while excavating in the city ofAix-en-Provence permits the elaboration of a sedimentary model for the Oligocene gypsiferous marls. These seem to have been deposited on a coastal plain, in continental waters characterized by a fluctuating, very low, salt-content.     

Kerfornella nov. gen., Trilobite Homalonotidae de l'Ordovicien armoricain et iberique

In the Massif Armoricain, Kerfornella nov. gen. includes several trilobites from the Llanvirn and the Llandeilo:K. brevicaudata (DESLONGCHAMPS) and K. cf. brevicaudata in Normandie, K. miloni nov. sp. and K. nov. sp. aff. miloni in the Synclinorium median. All these species, previously attributed to Plaesiacomia ? brevicaudata (DESLONGCHAMPS), would belong to two distinct phyletic lines. The stratigraphical interest of K. brevicaudata, which occurs in the Lower Grès de May and in the “quartzites Botella” from eastern Sierra Morena, is confirmed.     

Palynoflores dans la coupe de l'Albien de Foz do Folcao (Portugal)

In the area of Lisbon (Portugal) near Foz do Folcao and along the sea-shore, the transgressive facies of the marly 0611 Albian may be seen sesting on the “Upper continental sandstones of Almargem”. On the basis of the variety and of the relative frequencies of reticulate pollen grains in particular, the following age assessment can be made. The topmost part of the “Upper sandstones of Almargem” as well as the lowermost transgressive facies, just underlaying the albian levels with associated faunas, are suggested to be middle Albian.     

Decouverte de restes de Cyprinidae (Poissons teleosteens)dans l'Oligocene moyen de Marseille (Bouches-du-Rhone)

Cyprinid Fish-remain (an articulated skeleton of Varhostichthys sp. and isolated pharyngeal teeth) have been found in the Upper part of the “argiles de Saint-Henri”, a Middle oligocene formation of Marseilles basin. The finding of these Fish-remains confirms that these deposits have been sedimented under fresh-water conditions.     

Les occupations gravettiennes de Buran-Kaya III (Crimée) : contexte archéologique

Buran-Kaya III (Crimea, Ukraine) is a unique site, with a stratigraphy from Middle to Final Palaeolithic. The Gravettian layers 5-2, 6-1 and 6-2 of this site yielded numerous lithic and bone industries, ornaments from marine and freshwater shells, mammal teeth and mammoth ivory, human fossils and abundant faunal remains. Аccording to the stylistic indications of the lithic and bone inventories, the settlements of layers 5-2, 6-1 and 6-2 of Buran-Kaya III represent local variants of the Gravettian in Crimea and in mainland Ukraine and, therefore, the existence of separately social communities. Conversely, ornament objects and human remains (with specific mortuary practices) of Buran-Kaya III may suggest extensive social contacts of its Gravettian inhabitants with other human populations from mainland Ukraine. These hypotheses make necessary future investigations about the social organisation of the Epigravettian societies in Eastern Europe.     

Approche de l'evolution thermique au Neogene a partir des invertebres marins mesogeens

Considering only the significant groups, it is possible, in a first approximation, to recognize three steps in thethermic evolution during the Neogen period. In the lower Miocen, a climate mediterranean-warm to intertropical; a temperature getting lower and lower, but not regularly, during the rest of Miocen period; in the Pliocen, a climate hardly warmer than ours nowadays.     

Nouvelles observations de cannelures horizontalessur les berges vaseuses de l'estuaire de la Gambie et leur interpretation comme traces de broutage de poissons

Localisation, morphology and scratches wich characterise fluting features observed in the Gambia estuary are due 0610 to the feeding activity of fishes (as have suggested Schwarz et alii, 1975) and not due to the effects of biodestruction as proposed by F. Teissier (1957).     

Note preliminaire concernant la decouverte d'une faune et d'une flore du niveau de Ronzon dans l'Oligocene inferieur du Bassin d'Aquitaine

The new locality of Ruch (Gironde), from a lateral facies of the “Calcaire de Castillon” formation has yielded an important flora and fauna. From the biostratigraphic point of view the mammalian fauna allows to show that Ruch is contemporaneous of the reference locality of Ronzon (Auvergne).