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This paper describes the presence of insect traces that appear in large quantities at the Pliocene - lower Pleistocene dune formations in Mallorca. We discuss two hypotheses about possible producers. It also reveals the mystery about the origin of these fossil traces that had been previously attributed to enigmatic organisms, faecal pellets or coprolites of Myotragus sp., are really insect trace fossils, attributable to the beetles pupation cameras. The presence of these fossil traces has a clear palaeoclimatic meaning which can be derived stratigraphic dating.

Pons G.X.,University of the Balearic Islands | Vadell M.,Museu Balear de Ciencies Naturals
Monografies de la Societat d'Historia Natural de les Balears | Year: 2011

In the caves of the Balearic Islands over 300 species of invertebrates (including terrestrial and aquatic species) are known until today. Of these, approximately 50 can be considered genuinely troglobiontic species. Over half of these are endemic species unique to the Islands, a percentage large enough in evolutionary terms to give an idea of its great heritage value and interest in its preservation. The cave organisms constitute a very important part of the catalog of endemic fauna in the Balearic Islands. Since Racovitza described Typhlocirolana moraguesi in 1905, the first step in the new science of biospeleology, have been many scientists who have penetrated to the caves in search of new and enigmatic species. The Balearics were also the birthplace of the discipline with the interest and constant presence of local researchers in national and international scientific publications. Since 1905 there have been many papers published on the ongoing findings of cave species. For the preparation of this article have been selected terrestrial cave species that are new to the catalogs of taxa published since 1995 (publication date of the monograph Endins 20) or those species that are important regarding biogeography, particularly the endemisms.

Mas G.,Museu Balear de Ciencies Naturals | Obrador A.,Autonomous University of Barcelona | Fernandez M.,Cami Vell de Sant Climent | Quintana J.,Autonomous University of Barcelona
Bolleti de la Societat d'Historia Natural de les Balears | Year: 2010

The presence of the longirostrine crocodilian Tomistoma cf. lusitanica (Vianna & Moraes, 1945) in the Lower Tortonian of Menorca (Baleares Islands, Spain) is recorded. This is a stenotherm, tropical form whose palaeoecologic contribution to characterize deltaic-torrential environments is discussed. The presence of these Miocene crocodilians is an excellent biological indicator of the tropical and/or subtropical conditions that prevailed during Lower Tortonian in Menorca. Also it provides a review and collection of reptile fossils dating from the Balearic Islands.

Gornals G.M.,Museu Balear de Ciencies Naturals | Diaz F.E.,Sant Antoni Maria Claret 52 | Cardona J.Q.,Autonomous University of Barcelona
Batalleria | Year: 2013

A unique tooth of Delphinidae from the Lower Tortonian (Upper Miocene) of the bioturbated packstones (inner ramp) located in Torre d'en Penjat (Es Castell, south eastern end of the island of Menorca) is described. This was the first discovery of a Delphinidae in the Balearic Neogene. The length of the tooth is in accordance with the variation range of Etruridelphis giulii Lawley, 1876 (=Steno bellardii Portis, 1886) from the Italian Pliocene. However, the maximum diameter of the root in this specimen is swiftly thickness. Despite the Upper Miocene chronology, the possibility that the tooth belonged to a species described in the Italian or Iberian Peninsula Pliocene cannot be discarded, given that some of the Upper Miocene marine species appeared in Pliocene sediments, once the Messinian regressive episode finished.

FORNoS J.J.,University of the Balearic Islands | GRaCIA F.,Grup Nord Mallorca | Mas G.,Museu Balear de Ciencies Naturals | Vicens D.,Societat dHistoria Natural de les Balears
Bolleti de la Societat d'Historia Natural de les Balears | Year: 2015

Recent speleological survey in the flooded passages of Cova des Dolç (Colònia de Sant Jordi, Mallorca) had permitted the description of the sedimentary Pliocene-Quaternary transition in the southeastern sector of the Campos basin. It corresponds to a regressive sequence characterized by the transition from shallow marine bioturbated facies, brackish waters environments and aeolian deposition. The cave is sculptured on the bioclastic calcarenites than form the aeolianites, being this the more characteristic and differential trend with the other coastal caves which develop on Late Miocene reefal limestones in the llevant and migjorn areas of Mallorca.

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