Phragmatopoma Mörch, 1863

Type species. Phragmatopoma caudata Krøyer in Mörch, 1867; by monotypy.

Diagnosis (modified from Chávez-López 2020). Opercular lobes completely fused. Opercular crown with three rows of paleae, middle paleae covering inner paleae. Outer paleae geniculate with flat blades, distal denticles, often with medial plume. Middle and inner paleae strongly geniculate directed inwards with convex blades. Nuchal hooks and spines absent. Multiple compound tentacular filaments. Median ridge with eyespots. Median organ absent. Three parathoracic segments.