Their diversity is essential for their conservation”, explains the MNCN researcher Violeta López. Taxonomy of ‘Asterina’ In addition to the discovery of the two new species, the work has confirmed the assignment to the genus Asterina of the three previously known star species, morphologically characterized with traditional methods. Through genetic analysis of various samples, scientists have shown that they are Asterina gibbosa, Asterina pancerii and Asterina phylactica. In the case of the last two, they have analyzed the material that served as the basis for their original descriptions, managing to sequence DNA from samples preserved or dried between the 50s and 70s of the last century, from the Museo Civico di Storia Naturale Giacomo Doria (Italy) and the Natural History Museum (UK). “All this information has made it possible to clarify the taxonomy of this
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group of small starfish and to differentiate Trinidad and Tobago Email List the different species within the genus Asterina”, points out Iván Acevedo, also a scientist at the MNCN. Knowledge of the species that make up this genus of starfish, some of which are seriously threatened, is essential to guarantee their conservation, as the researchers point out. An international team explains why specimens of an alpine flower that reproduce without fertilization are more widely distributed than their sexual counterparts It measures between 5 and 20 centimeters, its flower is white and it is the alpine version of the popular Mediterranean “buttercups”, which are yellow. The Ranunculus kuepferi, despite its apparent fragility, is one of the plant species that has best adapted to life in extreme conditions, such as the high mountain climate. It has been adorning the valleys of the highest mountains in Europe for thousands of years,
where more than 30,000 wild species coexist. Knowing how it has achieved this can contribute to a better understanding of how living beings respond to the changes that occur on Earth. In the case of the alpine “buttercups”, the key seems to be in the way they reproduce, This team has spent several years collecting information, comparing different databases of the location and distribution of the species, which, crossed with climatic references (humidity, sun exposure or temperature, among others) have served to explain why Ranunculus kuepferise extends from different way through the Alps. According to phylogenetic studies, the buttons survived during the last ice ages (c. 21,000 years) in the westernmost part of the Alps and began their extension towards the East about 10,000 years ago. However, only a part of them has managed to reach the eastern area of the mountain range.