Ophiurida Muller & Troschel 1840
- Dataset
- Morphological diagnoses of higher taxa in Ophiuroidea (Echinodermata) in support of a new classification
- Rank
- ORDER
Classification
- kingdom
- Animalia
- phylum
- Echinodermata
- class
- Ophiuroidea
- order
- Ophiurida
diagnosis
Diagnosis Arms never branching. Spine articulation with muscle opening generally surrounded by ridges and / or knobs and separated from nerve opening by vertical ridge, lateral arm plates generally with external ornamentation (tubercles, striation, spurs). Strong influence of paedomorphosis (Stöhr & Martynov 2016).