Magelona sp., from here.

Belongs within: Annelida.
Contains: Spionidae.

The Spionida are a group of polychaete worms characterised by the presence of a pair of grooved peristomial feeding palps, associated with posteriorly-projecting nuchal organs.

| i. s.: UncispionidaeRF98
|--Apistobranchus [Apistobranchidae]PE16
| `--A. typicus (Webster & Benedict 1887)RP07
| `--Magelona [Magelonidae]PE16
| |--M. dakiniPG98
| |--M. mirabilisZHT01
| |--M. papillicornisHS01
| |--M. pitelkaiSRT18
| `--M. sachalinensisKBC03
`--+--Trochochaeta [Trochochaetidae]PE16

*Type species of generic name indicated


[HS01] Hayward, B. W., A. B. Stephenson, M. S. Morley, W. M. Blom, H. R. Grenfell, F. J. Brook, J. L. Riley, F. Thompson & J. J. Hayward. 2001. Marine biota of Parengarenga Harbour, Northland, New Zealand. Records of the Auckland Museum 37: 45–80.

[KBC03] Kashin, I. A., E. V. Bagaveeva & S. F. Chaplygina. 2003. Fouling communities of hydrotechnical constructions in Nakhodka Bay (Sea of Japan). Russian Journal of Marine Biology 29: 267–283.

[PE16] Parry, L. A., G. D. Edgecombe, D. Eibye-Jacobsen & J. Vinther. 2016. The impact of fossil data on annelid phylogeny inferred from discrete morphological characters. Proceedings of the Royal Society of London Series B—Biological Sciences 283: 20161378.

[PG98] Probert, P. K., & S. L. Grove. 1998. Macrobenthic assemblages of the continental shelf and upper slope off the west coast of South Island, New Zealand. Journal of the Royal Society of New Zealand 28: 259–280.

[RF98] Rouse, G. W., & K. Fauchald. 1998. Recent views on the status, delineation and classification of the Annelida. American Zoologist 38: 953–964.

[RP07] Rousset, V., F. Pleijel, G. W. Rouse, C. Erséus & M. E. Siddall. 2007. A molecular phylogeny of annelids. Cladistics 23: 41–63.

[SRT18] Schiffer, P. H., H. E. Robertson & M. J. Telford. 2018. Orthonectids are highly degenerate annelid worms. Current Biology 28: 1970–1974.

[ZHT01] Zrzavý, J., V. Hypša & D. F. Tietz. 2001. Myzostomida are not annelids: molecular and morphological support for a clade of animals with anterior sperm flagella. Cladistics 17: 170–198.

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