Heavy pigtoe, Judge tait's mussel
Pleurobema taitianum, the heavy pigtoe or Judge Tait's mussel, was a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels.
This species was endemic to the United States.
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Congregatory animals tend to gather in large numbers in specific areas as breeding colonies, for feeding, or for resting.
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Social animals are those animals that interact highly with other animals, usually of their own species (conspecifics), to the point of having a rec...
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Social animals are those animals that interact highly with other animals, usually of their own species (conspecifics), to the point of having a rec...