Orbiniida

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Orbiniida
The orbiniid worm Phylo felix.
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Annelida
Clade: Pleistoannelida
Clade: Sedentaria
Order: Orbiniida
Fauchald 1977[1] sensu Struck et al. 2015[2]
Families[2][3]

Orbiniida is an order of small

sand grains.[2]

Classification

First mentioned in 1977, Orbiniida was an order of the

parapodia with simple chaetae.[1]

However, through

Diurodrilidae, and Apharyngtus, and possibly Dinophilidae too.[3]

Evolutionary history

larval or juvenile stages of a larger pleistoannelid ancestor temporarily inhabiting the interstitium stopped their somatic growth, became sexually mature and stayed in the interstitium permanently.[2]

Pleistoannelida
Errantia

Aciculata

Protodriliformia

Sedentaria
Orbiniida

other Sedentaria

'Archiannelids'

Although Dinophilidae possibly belongs to Orbiniida,[3] a more recent analysis recovered several times the clade Dinophiliformia, containing the genera in Dinophilidae, as sister group to Sedentaria+Errantia. This would imply a third separate lineage of interstitial, miniaturized worms.[5]

References

  1. ^ a b Fauchald, Kristian (3 February 1977), The polychaete worms, definitions and keys to the orders, families and genera (PDF), Science Series, vol. 28, Natural History Museum of Los Angeles County: Los Angeles, CA (USA), pp. 1โ€“188
  2. ^
    PMID 26212885
    .
  3. ^
    hdl:10852/93589
    .
  4. doi:10.1007/s13127-016-0265-7
    .
  5. hdl:10230/46083
    .
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