Several extinct species have been postulated, but owing to a lack of evidence they can only be regarded as hypothetical extinct species. They have caused confusion, as they may have been a separate species, a subspecies, or an introduced species.
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Famous quotes containing the words extinct and/or species:
“One realises, with horror, that the race of men is almost extinct in Europe. Only Christ-like heroes and woman-worshipping Don Juans, and rabid equality-mongrels. The old, hardy, indomitable male is gone.”
—D.H. (David Herbert)
“Nature seemed to have adorned herself for our departure with a profusion of fringes and curls, mingled with the bright tints of flowers, reflected in the water. But we missed the white water-lily, which is the queen of river flowers, its reign being over for this season.... Many of this species inhabit our Concord water.”
—Henry David Thoreau (1817–1862)