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Two new crustacean discovered in the Iberian Peninsula paleobotanical


Two new crustacean discovered in the Iberian Peninsula. A team of scientists has described two cladoceran crustaceans, which may be endemic to the Peninsula Ibérica, which were discovered in two lagoons, one in the lower basin of the Guadalquivir River, and the other in the plains of Extremadura. Both of these arthropods may now inhabit the areas in the Mediterranean region.

"These two new crustaceans (Leydigia) are a kind of living fossil and are very powerful indicators bio-geographical and historical," said Miguel Alonso, one of the authors of the study and researcher at the Department of Ecology at the University of Barcelona (UB).

The first of the species discovered in the Iberian Peninsula, Leydigia had been previously described with the name of acanthocercoides Leydigia. The crustacean was found in the lagoon Longuilla in the lower basin of the river Guadalquivir.

"Acanthocercoides Leydigia always been cited as originating in the Iberian Peninsula, and is very likely that many crustaceans that have been identified with this name belongs to one of the new species discovered. However, acanthocercoides Leydigia may not even exist in the Peninsula, "said Alonso.

The second type, Leydigia korovchinskyi, was discovered in Lake Chaparral, a cattle trough in the pastures of Extremadura. These crustaceans are cladocerous an inch long and live in fresh water bodies often dried.

The research, which was recently published in the journal Zootaxa, shows that ancient arthropods - from the Permian (250 million years ago), and have a very slow rate of morphological changes. "So we think that divides a long time," adds the researcher.

The Mediterranean region a breeding species. The two crustaceans appear to be endemic to the Iberian Peninsula. However, the study shows it may be distributed over a larger area of \u200b\u200bthe length of the Mediterranean region. All these areas are "a focus of endemism for cladoceran crustaceans, as is also the case of Japan and eastern Russia, "says Alonso.

In Spain, these endemic species are some of the faunal remains from before the Pleistocene fauna, more than 1.8 million years, due to the "marginal" nature of its habitat during the glaciations. Crustaceans do not colonize new territories until the ice had melted.


Source: ecologismo.com

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