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Family Geryoniidae
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Order
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Class
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Hydrozoa
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No. of Genera in Ref.
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No. of Species in Ref.
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Environment
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Fresh : No |
Brackish : No |
Marine : Yes
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Aquarium
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First Fossil Record
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Remark
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Carapace hexagonal; dorsal surface relatively smooth to granular; frontal margin with 4 teeth; anterolateral margins distinctly convex, each with 3 to 5 low, sometimes indistinct teeth. Dactylus of walking legs T-shaped in cross-section. Male abdominal segments 3 to 5 fused, functional immovable, but sutures still visible (Ref. 343).
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Etymology
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Division
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Reproductive guild
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Typical activity level
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Main Ref.
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Coordinator
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