Oxea

Definition

In D.; a monaxon (diactinal); usually a symmetrical spicule pointed at both ends (e.g., genus Xestospongia); o. may be acantho‐, iso-, aniso-, tricho‐, angulate, asymmetrical, centrotylote, curved, flexuous, fusiform, or polytylote; the tips can be acerate, asymmetrical, blunt, conical, hastate, mucronate stepped, or symmetrical.

Synonyms

Rarely called amphioxea

Photos