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Catalunya viu un declivi progressiu i generalitzat de la seva biodiversitat, segons es desprèn de l’informe ‘Estat de la Natura a Catalunya 2020’, la primera avaluació de la biodiversitat basada en la millor evidència científica disponible. El document posa en evidència que les poblacions de vertebrats (peixos, rèptils, amfibis, ocells i mamífers) i d’invertebrats (papallones) sobre les que es tenen dades de seguiment a llarg termini han perdut, de mitjana, un de cada quatre individus (un 25%) els darrers 18 anys. Leer más.

 

A new species of the Liolaemus capillitas clade is described. Liolaemus galactostictos sp. nov. differs from other members of its group by a combination of morphological and molecular traits, in particular its black dorsal coloration pattern not found in any other Liolaemus species. Liolaemus galactostictos sp. nov. is only known from its type locality. This new species is found in rocky fields surrounded by grasslands on the top of the Velasco Mountains, a ¨sky island environment¨, in northwestern Argentina. As well as other members of its clade this species seems to be strictly saxicolous, viviparous and feeds on insects. Leer más.

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Bayesian, maximum likelihood and network-based phylogenetic analyses of up to 4,905 ddRADseq-loci (294,300 nucleotides of sequence) supported the distinctiveness of all currently recognised species (Salamandra algira, S. atra, S. corsica, S. infraimmaculata, S. lanzai, and S. salamandra), and all five species for which we have multiple exemplars were confirmed as monophyletic. Within S. salamandra, two main clades can be distinguished: one clade with the Apenninic subspecies S. s. gigliolii nested within the Iberian S. s. bernardezi/fastuosa; the second clade comprising all other Iberian, Central and East European subspecies. Our analyses revealed that some of the currently recognized subspecies of S. salamandra are paraphyletic and may require taxonomic revision, with the Central- and Eastern-European subspecies all being poorly differentiated in the analysed genomic markers. Salamandra s. longirostris – sometimes considered a separate species – was nested within S. salamandra, consistent with its subspecies status. Leer más.

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