An appendage that is similar to a tail in location and gross appearance but which lacks some of the features of a true tail.
2002, Jay M. Savage, The Amphibians and Reptiles of Costa Rica, A number of species, however, have a pseudotail consisting of a few postcloacal vertebrae, but annulation is incomplete and a terminal shield is consistently present.
2012, Issues in Life Sciences: Zoology, The spermatozoon of Saduria entomon is long and bent, resembling a whip. It consists of a very long pseudotail (1.86 mm long), which lacks an axoneme, and an extended head (112 pm long) that hangs down at an acute angle,†scientists in Poznan, Poland report.
2014, Lawrence F. Eichenfield, ‎Ilona J. Frieden, & ‎Andrea Zaenglein, Neonatal and Infant Dermatology, A true human tail (persistent vestigial tail) is rare and is differentiated from a pseudotail and an acrochordon by the presence of a central core of mature fatty tissue, small blood vessels, bundles of muscle fibers, and nerve fibers.
