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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