Actiniaria with elongate, vermiform body usually divisible into two or more regions: between the long scapus provided with periderm and the short capitulum may be a short scapulus that lacks periderm and ectodermal specializations. Aboral end rounded, without basilar muscles, may be differentiated into a physa. Weak ventral siphonoglyph. No sphincter or acontia. Mesenteries divisible into macro- and micro- cnemes; always eight perfect macrocnemes and at least four microcnemes. Macrocnemes comprise two pairs of directives and four lateral mesenteries, two on each side, whose retractors face the ventral directives. Retractors diffuse to strongly restricted; parietal muscles always distinct.
No one has provided updates yet.