Forcipulatida


The Forcipulatida are an order of sea stars, containing three families and 49 genera.

Description

Forcipulatids share with the brisingid sea stars distinctive pedicellariae, consisting of a short stalk with three skeletal ossicles. Unlike that group, however, the forcipulatids tend to have more robust bodies. The order includes some well-known species, such as the common starfish, Asterias rubens. This order can be commonly found from North Carolina in the United States all the way to Santos in Brazil.

Phylogeny

The order is divided into three families:
World Register of Marine Species gives another taxonomy, with 7 families and 64 genera:
A 2020 study involving phylogenetic analysis and scanning electron microscopy of the skeleton and ossicles of taxa from the superorder Forcipulatacea recovered Asteriidae, Stichasteridae, Zoroasteridae, and Brisingida as monophyletic.
The extinct family Terminasteridae has also been placed in this order.