From mytilus + -form.
mytiliform (comparative more mytiliform, superlative most mytiliform)
- Shaped like the shell of a mussel.
2015 July 17, Rafael Araujo, Yde de Jong, “Fauna Europaea: Mollusca – Bivalvia”, in Biodiversity Data Journal[1], →DOI:Species on this family can be identified by its mytiliform form, sometimes quadrate, with the hinge edentulous and the umbos anterior or terminal.