Glossary of terminology, part I A hypothetical hindleg in a three-dimensional coordinate system defined by the anteroposterior, dorsoventral, and basoapical directional axes B apicalmost tarsomere and pretarsus in ventroapical view, with the retracted arolium highlighted in orange C probasitarsus and protibial apex in posterior view, with the comb of strigil highlighted in orange. Abbreviations: ar, arolium; bt, basitarsus; ca, calcar of strigil; cx, coxa; cw, claw; fm, femur; ma, manubrium; sgc, comb of strigil; tb, tibia; t1–5, tarsi; tch, trochanter. Illustrations by FA Esteves.