LIFE IN A DROP OF WATER

Acroperus harpae (Baird, 1834), Phylum Arthropoda, Subphylum Crustacea, Order Cladocerans Plankton (from greek πλαγκτόν, that vagabond) is the category that includes the ecological complex of aquatic floating organisms, not being able to actively directing their movement (at least in the horizontal direction), are passively transported by currents and wave action.…

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TRILOBITES

Trilobites are a group of marine arthropods of small and medium-sized, lived during the Paleozoic Era disappeared completely at the end of the Permian, about 230 million years ago, although their mass extinction occurred at the end of the Devonian.     Trilobites are found in marine deposits of a…

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