Order BIPHRAGMOPHORA Cassanova, 1985
Introduction
With ventral transverse muscle bands (phragma) that appear whitish in living animals.
Comprises five families: Spadellidae, Eukrohniidae, Bathyspadellidae, Krohnitellidae and Krohnittidae.
With ventral transverse muscle bands (phragma) that appear whitish in living animals.
Comprises five families: Spadellidae, Eukrohniidae, Bathyspadellidae, Krohnitellidae and Krohnittidae.