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Ark clams are distinct from other clams in having red blood pigments that facilitate the transport of oxygen to their tissues and enable them to inhabit more hypoxic environments. [1] Ark clams reach reproductive maturity when they are about twelve months old and about 20 mm long. The spawning cycle typically begins in the rainy season.
Deinotherium is an extinct genus of large, elephant-like proboscideans that lived from about the middle-Miocene until the early Pleistocene.Although its appearance is reminiscent of modern elephants, Deinotherium possessed a notably more flexible neck, with limbs adapted to a more cursorial lifestyle, as well as tusks which grew down and curved back from the mandible, as opposed to the forward ...