Zooplankton of the South Atlantic Ocean
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Zooplankton of the South Atlantic Ocean
Key: Step 399. Polychaeta: Family Typhloscolecidae
Polychaeta: Family Typhloscolecidae

Prostomium with large transverse ciliated lobes dorsally and ventrally. PRosette glandstomium blunt and bearing a small asymmetrical palpode. Ciliated lobes almost as broad as the head, the dorsal one with a pair of small rounded nuchal lappets at the sides.

Typhloscolex mulleri

Prostomium with nuchal organs as curved ridges without freely projecting lobes. No projecting caruncle. PRosette glandstomium with a small palpode. Head with a pair of semicircular nuchal ridges on dorsal region but no free nuchal lobes.

Sagitella kowalewskii

Prostomium with nuchal organs extended backward as free processes. A caruncle usually present.

Step 400
Decision path