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Poznaliśmy nowego trylobita

Znaleziona w Ribatejo skamieniałość trylobita przedstawia dotychczas nieznany gatunek tych wymarłych już zwierząt. Odkryta przez portugalskich geologów pozostałość jest pięciokrotnie większa niż znalezione wcześniej okazy.
Dotychczas portugalscy uczeni z uniwersytetu UTAD w Vila Real uważali, że odkryta w pobliżu wsi Chao de Lopes Pequeno, pod Santarem, skamielina reprezentuje okaz tzw. trylobita małego. Jednak po dokładnej analizie wyglądu skamieniałego zwierzęcia i porównaniu go z podobnymi okazami z innych części świata okazało się, że trylobit pochodzi z nieznanego wcześniej nauce gatunku. - Nasze podejrzenia, że natrafiliśmy na zupełnie nowy gatunek trylobita, pojawiły się po dokonaniu pomiarów znalezionej skamieniałości. Odkryty przez nas okaz jest aż pięciokrotnie większy od znalezionych dotychczas na świecie pozostałości tego stworzenia. Nasze znalezisko, o długości 5 cm, jest przełomowe dla wiedzy o tych prastarych zwierzętach - przekonywał Artur Sa z Wydziału Geologii na uniwersytecie w Vila Real.

Największa skamieniałość trylobita, o długości aż 86 cm, znaleziona została przed laty również w Portugalii. - Region Ribatejo, szczególnie dystrykt Macao, jest niezwykle bogaty w bardzo dobrze zachowane skamieniałości zwierząt z gromady trylobitów. 450 mln lat temu w miejscu tym istniało głębokie morze wypełnione tymi stworzeniami - tłumaczył Artur Sa.

Trylobity to gromada wymarłych morskich stawonogów, charakteryzujących się owalnym i spłaszczonym ciałem. Pokryte wapiennym pancerzem zwierzęta pojawiły się w okresie kambru, a wyginęły z końcem permu. Żyły na grząskich dnach mórz.

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