This　paper　describes　a　class　of　third-order　explicit　autonomous　differential　equations,　called　jerk　equations,　with　quadratic　nonlinearities　that　can　generate　a　catalog　of　nine　elementary　dissipative　chaotic　flows　with　the　unusual　feature　of　having　a　single　non-hyperbolic　equilibrium.　They　represent　an　interesting　subclass　of　dynamical　systems　that　can　exhibit　many　major　features　of　regular　and　chaotic　motion.　The　proposed　systems　are　investigated　through　numerical　simulations　and　theoretical　analysis.　For　these　jerk　dynamical　systems,　a　certain　amount　of　nonlinearity　is　sufficient　to　produce　chaos　through　a　sequence　of　period-doubling　bifurcations.　(C)　2015　Elsevier　B.V.　All　rights　reserved.