Flaccisagitta, Tokioka, 1965 a

Choo, Seohwi, Jeong, Man-Ki & Soh, Ho Young, 2022, Taxonomic reassessment of chaetognaths (Chaetognatha, Sagittoidea, Aphragmophora) from Korean waters, ZooKeys 1106, pp. 165-211 : 165

Order Aphragmophora Tokioka, 1965a

Diagnosis.

Ventral transverse musculature absent, less glandular structures on body surface. Grasping spines gently or abruptly curved ( Tokioka 1965a). Collarette absent, present or small that is almost absent. Intestinal diverticula absent or present. One or two rows of teeth, teeth-rows arranged in comb or fan shape. One paired or two paired lateral fins with or without rayless zone ( Alvariño 1967).