HISTORY OF ONYCHOPHOROLOGY, 1826-2020

Abstract

Velvet worms, or onychophorans, are animals of extraordinary importance in the study of evolution. This is the first history of their study. They were described by Lansdown Guilding (1797-1831). This paper identifies the landmarks of their study, in a worldwide level, for almost 200 years. The beginning, 1826-1879, was based on describing their anatomy with light miscroscopy, mostly by famous French naturalists such as Milne-Edwards and Blanchard. In 1880-1929 peiord, work concentrated in anatomy, physiology, behavior, biogeography and ecology, but the most important work was Bouvier`s mammoth monograph. The next period, 1930-1979, was important for the discovery of Cambrian species; Vachons explanation of how ancient distribution defined the existence of two families; Pioneer DNA and electron microscopy from Brazil; and primitive attempts at systematics using embryology or isolated anatomical characteristics. Finally, the 1980-2020 period, with research centered in Australia, Brazil, Costa Rica and Germany, is marked by an evolutionary approach to everything, from body and behavior to distribution; for the solution of the old problem of how they form their adhesive net and how the glue works; the reconstruction of Cambrian onychophoran communities, the first experimental taphonomy; the first countrywide map of conservation status (from Costa Rica); the first model of why they survive in cities; the discovery of new phenomena like food hiding, parental feeding investment and ontogenetic diet shift; and for the birth of a new research branh, Onychophoran Etnobiology, founded in 2015,