| Ulmaridae (), subfamily: Poraliinae |
| 25 cm WD (male/unsexed) |
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pelagic; marine; depth range 550 - 2522 m |
| Cosmopolitan. |
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Up to 25 cm wide; margin wavy, with 16 deep clefts for the rhopalia; the ring canal gives rise to one or two blindly-ending diverticula in each of the inter-rhopalar spaces; about 40 simple radial canals; gonads an almost continuous ring around the periphery of the stomach. |
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Not Evaluated (N.E.) Ref. 123251)
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