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Steinhaus, 1896

Description
Hooks: 8-11; anterior teeth: 6-9; posterior teeth: 10-14.
Maximum adult body length: 37 mm; tail: 19-21 %.
Body large and firm, opaque; transversal musculature absent; head wide; hooks not serrated. Fin bridge present. Anterior fins long, reaching middle of ventral ganglion, partially rayed, angular; posterior fins long, partially rayed, angular. Collarette long; gut diverticula present. Small eyes with T-shaped pigment spot. Seminal vesicles; position of seminal vesicles: touching posterior fins. Ovaries very long, reaching neck region, broad; ova fairly small. Adhesive papillae and adhesive organs absent; apical glands absent.

Distribution: shallow-mesopelagic; cosmopolitan circumglobal between 40°N and 40°S.

Remarks:

Type locality: tropical Atlantic.

Sagitta planctonis