The allopolyploid origin ofSedum rupestre subsp.rupestre (Crassulaceae)

InSedum rupestre L. a polyploid series (x = 16) occurs in which aneuploid chromosome numbers and odd levels of ploidy prevail. The most common and widely distributed cytotype,S. rupestre subsp.rupestre, is 2n = 112. Plants resemblingS. rupestre subsp.rupestre can be obtained by hybridizing the tetraploid cytotypes ofS. forsterianum Sm. (2n = 48) andS. rupestre subsp.erectum 't Hart (2n = 64). Comparison of these artificial hybrids with their parents and a large number of plants ofS. rupestre subsp.rupestre (2n = 112) from nature showed thatS. rupestre subsp.rupestre and the artificial hybrids are morphologically indistinguishable, and intermediate betweenS. forsterianum andS. rupestre subsp.erectum. MorphologicallyS. rupestre subsp.rupestre is closer to subsp.erectum than toS. forsterianum. Chloroplast DNA restriction patterns ofS. rupestre subsp.rupestre, however, resembleS. forsterianum more closely. The combined results of the hybridization experiments, the analysis of the cpDNA restriction patterns, and the morphological variation indicate the allopolyploid origin ofS. rupestre subsp.rupestre. Natural hybrids inSedum (Crassulaceae) 4.     

Revisión del género Diacodexis (Artiodactyla, Mammalia) en el Eoceno inferior del Noreste de España

Most of the material review in this paper was included in the work of Sudre et al. (1983), some other provides from new sites. Two new species of primitive artiodactyls are described here: Diacodexis corsaensis n. sp. and Eygalayodon isavenaensis n. sp., which is considered the most plesiomorphic form of the subfamily Eurodexeinae and probable derived from Diacodexis corsaensis n. sp. It is for the first time that a representative of the Eurodexeinae is found in the Iberian Peninsula, where they might originate.     

Coliboaia,art rupestre aurignacien en Roumanie

Dating at the same time as Chauvet in the very West, the Coliboaia rock arts in Romania are obvious proofs for traditional mythologies and arts unities, extended all across the continent during the Aurignacian expansion from the East of Europe. These traits are to be added to the ethnicity (modern people), technologies (antlers weapons) and behavior (fast animals riding).     

Nouvelles découvertes d'art rupestre au Mato Grosso (Cidade de Pedra, Rondonópolis, Brésil)

Since 1983, Professor Agueda Vilhena-Vialou is conducting in Mato Grosso (Brazil) the French-brasilian archeological mission Fossil men and their paleo-environments in the Paraná basin. Its goal is the study of the first prehistoric settlements of Latin America's heart, in their economic, social, cultural and symbolic dimensions. Thanks to the complementary and comparative analysis of the habitats, the regional settlements and the rock art, our research targets a more precise definition of territories and cultures proper of the prehistoric human groups from the South of the actual Mato Grosso state. The study of rock art, the most revealing aspect of symbolic behaviours, is one of the strongest programs inside our multidisciplinary team. Today, thanks to systematic prospections led along the Rio Vermelho (between Pantanal swamp at West and Rondonópolis city at East), a hundred rock art sites (walls, shelters and caves), decorated with signs, animals and humans, have been discovered, and, for the most of them, studied. These figures are painted, engraved and more rarely sculpted. Along those pages, the author is presenting the preliminary analysis of ten new rock art sites, recently identified in a cliff on the right bank of the Vermelho River. He starts a comparative study with the sites of the Cidade de Pedra and of close micro basin, from the left bank of the River. This research is showing the symbolic identities, both common and specific, proper to different territories of this major rock art region of Brazil, which is divided in several areas and micro territories, shared but autonomous.