Oweniidae

Oweniidae is a family of marine polychaete worms in the suborder Sabellida. The worms live in tubes made of sand and are selective filter feeders,[1] detritivores and grazers.[2]

Oweniidae
Owenia fusiformis
Scientific classification
Kingdom:
Animalia
Phylum:
Annelida
Class:
Polychaeta
Order:
Canalipalpata
Suborder:
Sabellida
Family:
Oweniidae

Rioja, 1917
Genera
See text

Characteristics

Members of this family live in tubes made of sand and shell fragments. The head of the worm does not bear a proboscis but has the mouth at the tip rimmed by some very short tentacles. The body segments lack parapodium|parapodia and are smooth elongated cylinders. There are a large number of hooked chaetae or bristles on a small pad on the ventral side of each segment. These chaetae have two parallel teeth resembling claws which is a feature that distinguishes members of this family from other polychaetes. The posterior tip bears different appendages in different genera. Family members are unique in having a bell-shaped larval stage known as a mitraria larva. At one time the family was classified as the Ammocharidae.[1]

Genera
  • Galathowenia Kirkegaard, 1959
  • Myriochele Malmgren, 1867
  • Myriowenia Hartman, 1960
  • Owenia Delle Chiaje, 1844[2]


gollark: It's not "raised to" anything. For this the degree is just the maximum power it contains.
gollark: With reals it's n or less which is bad and nobody likes it.
gollark: It means that for a polynomial P(x) with degree n, P(x) = 0 has exactly n solutions.
gollark: … no.
gollark: Oh, and I should mention that the fundamental theorem of algebra is only for polynomials with a single variable in them, not stuff like x³y² which contain several.

References
  1. NIWA Guide to Polychaeta
  2. World Register of Marine Species
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