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Copyright of Boletin de Geologia is the property of Universidad Industrial de Santander and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Boletin de Geologia is the property of Universidad Industrial de Santander and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In layers of phosphorites and gray calcareous mudstones of the Loma Gorda Formation, in the vicinity of the municipal seat of Yaguará in Huila department, Colombia, were found fossils teeth of chondrichthyes, these were extracted from the rocks by mechanical means, to be compared with the species in the bibliography in order to indentify them. The species were: Ptychodus mortoni (order Hybodontiformes), were found, Squalicorax falcatus and Cretodus crassidens (order Lamniformes). This finding constitutes the first record of these species in the Colombian territory; which allows to extend its paleogeographic distribution to the northern region of South America, which until now was limited to Africa, Europe, Asia and North America, except for the Ptychodus mortoni that has been described before in Venezuela. [ABSTRACT FROM AUTHOR]

Ten species of fossil echinoids are herein described from different outcrops of the Austin Formation (Upper Cretaceous) in the El Freno and El Tecolote streams, located within the municipality of Jiménez, northern Coahuila. The assignment of the studied sections to the lower Campanian is based on the presence of the ammonites Scaphites hippocrepis and Delawarella delawarensis. Some of the taxa reported here, such as Cidaris texanus Clark, Salenia mexicana Schluter, Holectypus sp., Heteraster texanus Röemer, and Diplodetus sp, have also been reported at other localities in Mexico. In addition, in this paper Cidaris splendens Morton, Diplopodia hilli Clark, Orthopsis casanovai Cooke, Micraster uddeni Cooke, Mecaster batnensis (Coquand), and Diplodetus sp. are reported for the first time from Mexico, extending the paleogeographic distribution of these taxa into the western part of the proto-Atlantic Ocean. On the other hand, the presence of the species Cidaris texanus, Cidaris splendens, Selenia mexicana and Heraster texanus in the Austin Formation extends the temporal distribution of such species within the lower Campanian in Mexico and contributes to future biostratigraphic interpretations for the Cretaceous system based on echinoids. [ABSTRACT FROM AUTHOR]

Copyright of Boletin de Geologia is the property of Universidad Industrial de Santander and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Boletin de Geologia is the property of Universidad Industrial de Santander and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Abstract: Theropod teeth from the Bajo Barreal Formation (Upper Cretaceous: Cenomanian–Turonian) at the “estancia Ocho Hermanos”, Chubut Province are described. Most of them show features of Abelisauroidea, a clade already represented in the Bajo Barreal Formation by Xenotarsosaurus bonapartei and other isolated remains including a left maxilla. Dromaeosauridae and Carcharodontosauridae represent the first record of these taxa for the Bajo Barreal Formation. Besides this, at least three theropod clades (Abelisauroidea, Carcharodontosauridae, and Dromaeosauridae) coexisted in central Patagonia during the Cenomanian–Turonian along with other theropods as Aniksosaurus darwini and Megaraptor sp. [Copyright &y& Elsevier]

Abstract: We describe a new titanosaurian braincase (MML-194), from the Upper Cretaceous (middle Campanian–lower Maastrichtian) of Río Negro Province, Argentina. Among titanosaurs, this specimen resembles Bonatitan reigi, more than any other member of the clade; the similarity is based on the supraoccipital protuberance bearing a median groove (also present in Saltasaurus and Rapetosaurus), the prominent basal tubera, the exit for the nerve VII located on the prootic crest, the occipital condyle and the foramen magnum almost of the same width. This material allows to observe some internal structures that are not appreciable in other titanosaurs, such as the pituitary cavity, the dorsum sellae and the foramen for the passage of the internal carotids, among other characters. The specimen MML-194 and Bonatitan were exhumed of same geological unit, the Allen Formation, from which have also been collected fossil eggs assignable to sauropods (megalooliths), for what is not unlikely that some of these taxa has been responsible of the laying of those eggs. [Copyright &y& Elsevier]