The European research team in collaboration with scientists in Spain has described two new species of beetles the size of two millimeters in length. Coleoptera beetles were found in the waters flowing along the chains of the Pyrenees and prepireneyskih mountains (from Gipuzkoa to Girona) and in the Sierra de la Demanda (Burgos). Experts previously thought that they belong to another European species.
"This species, which is characterized by a limited series of insects, has been confused with another European species more common - vodobrodkami - which belong to the family Hydraena. So their independent evolutionary history still remains unknown" - said Ignacio Ribera (Ignacio Ribera), one of the authors of the analysis and a researcher at the Institute of Evolutionary Biology (CSIC-UPF) in Barcelona agency SINC.
Hydraena diazi, one of two new species of beetles have been found in the Montseny Nature Reserve in Barcelona. Insect the size of between 2.2 and 2.4 millimeters in length and inhabits the Pyrenees and prepireneyskie hills of Gipuzkoa to Girona.
The analysis, which was published recently in the journal "Zootaxa", also confirms the existence of another new species, Hydraena fosterorum, found in other mountain ranges, the Sierra de la Demanda (Burgos).
Individuals of this species, which have also been found in the northern part of the Iberian System mountains (Sierra del Moncayo), have size, fluctuating between 2.15-2.30 millimeters. According to information from the Ribera, two species are "only in well-preserved areas" and are similar to those of insects in the Pyrenees.
A characteristic feature of these insects - male sexual organs and their molecular data, and the fact that they are endemic (characteristic only of this region) in the Iberian Peninsula. "The most likely is that the roots of their origin belong to the same geographical area where they were discovered recently, meaning that we can use them to restore their history and biogeorafiyu" - explained the expert.
In order to classify the species, the experts used a combination of morphological and genetic studies. The results suggest that small genetic changes between the new view and the proximity of their geographical distribution coincides with the model put forward by the researcher Ribera.
The study also assumes that all kind of a big family Hydraena, including two new species, is the result of division of the common ancestor, spread throughout the Iberian Peninsula north of half a million years ago. Today, the insects remain in their original habitat areas.
Original: Physorg Translation: M. Potter