Zooplankton of the South Atlantic Ocean
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Zooplankton of the South Atlantic Ocean
Key: Step 883. Copepoda: Genus Hetrostylites males
Copepoda: Genus Hetrostylites males

Left P5 Exp3 with 2 unequal terminal spines, longest about 3 times length of shorter, and 1 shorter subterminal spine:

Heterostylites longicornis

Heterostylites longicornis

Left P5 Exp3 with 2 very unequal terminal spines, longest 14 times longer than shortest, and 1 longer subterminal spine:

Heterostylites major

Heterostylites major
Decision path