The Antennopoda (or Arthropoda s.l.) are a proposed clade consisting of the Euarthropoda and the Onychophora, as sister of the Tardigrada, together forming the Panarthropoda. Stanleycaris appears to be a basal euarthropod.

PanarthropodaTardigrada (Water bears) Antennopoda Onychophora (Velvet worms) Euarthropoda Stanleycaris hirpex Crown Euarthropoda
Tardigrada (Water bears)
AntennopodaOnychophora (Velvet worms) Euarthropoda Stanleycaris hirpex Crown Euarthropoda
Onychophora (Velvet worms)
EuarthropodaStanleycaris hirpex Crown Euarthropoda
Stanleycaris hirpex
Crown Euarthropoda

Antennopoda was defined by De Haro, where Tardigrada was not included in his tree. In a subsequent article, his use of Antennopoda was inconsistent with the current usage. Especially the position of the Tardigrada is disputed, the alternative hypothesis of Tactopoda includes tardigrades and arthropods as the sister group to velvet worms.