Cladosyllis

Cladosyllis
Scientific classification
Kingdom:	Animalia
Phylum:	Annelida
Clade:	Pleistoannelida
Subclass:	Errantia
Order:	Phyllodocida
Family:	Syllidae
Genus:	Cladosyllis; Aguado, Ponz-Segrelles, Schulze, Jimi, Tilic, Helm, van der Sprong, de Voogd, 2006
Species:	C. ramosa
Binomial name
	Cladosyllis ramosa; (McIntosh, 1879)

Cladosyllis is a monotypic genus of polychaete worm belonging to the family Syllidae. Cladosyllis is closely related to Ramisyllis, together with which it displays a branching body plan with a single head and multiple posterior ends.

The genus contains only the species Cladosyllis ramosa, formerly known as Syllis ramosa, the first species of branching syllid discovered, and is thought to include more species that are yet to be described.

Distribution and ecology

Worms belonging to the genus Cladosyllis inhabit hexactinellid sponges of the genus Crateromorpha at depths between 165 and 1000m. They have been recorded in several Indo-Pacific regions including the Philippines, Tayandu Islands in the Arafura Sea, Okinawa, Sagami, Suruga Bay and Fukutoku seamount (Japan) and in the Tasman Sea.

Description

Branching segments in Cladosyllis emerge from the side of the segment, at the usual placement of a parapodium, unlike in Ramisyllis where branching regions emerge from the region between segments. A member of the "Ribbon-Clade" (flattened Syllidae including also genera Trypanobia and Trypanosyllis), the anterior region and some branches have a flattened shape in Cladosyllis.

References

1 2 3 4 5 6 Aguado, MT; Ponz-Segrelles, G; Schulze, T; Jimi, N; Tilic, E; Helm, C; van der Sprong, J; de Voogd, N (2026). "Many branches, one lineage: museomic insights into the diversity and evolution of branching syllid worms". Zoological Journal of the Linnean Society. 208 (1). doi:10.1093/zoolinnean/zlag120.
↑ McIntosh, WC (1879). "On a remarkably branched Syllis dredged by H.M.S. Challenger". Journal of the Linnean Society, Zoology. 14: 720–724.
↑ Aguado, MT; Ponz-Segrelles, G; Glasby, C; Ribeiro, RP; Nakamura, M; Oguchi, K; Omori, A; Kohtsuka, H; Fischer, C; Ise, Y; Jimi, N; Miura, T (2022). "Ramisyllis kingghidorahi n. sp., a new branching annelid from Japan". Organisms Diversity and Evolution. 22: 307–405.

[Aguado2026-1] 1 2 3 4 5 6 Aguado, MT; Ponz-Segrelles, G; Schulze, T; Jimi, N; Tilic, E; Helm, C; van der Sprong, J; de Voogd, N (2026). "Many branches, one lineage: museomic insights into the diversity and evolution of branching syllid worms". Zoological Journal of the Linnean Society. 208 (1). doi:10.1093/zoolinnean/zlag120.

[2] McIntosh, WC (1879). "On a remarkably branched Syllis dredged by H.M.S. Challenger". Journal of the Linnean Society, Zoology. 14: 720–724.

[Aguado2022-3] Aguado, MT; Ponz-Segrelles, G; Glasby, C; Ribeiro, RP; Nakamura, M; Oguchi, K; Omori, A; Kohtsuka, H; Fischer, C; Ise, Y; Jimi, N; Miura, T (2022). "Ramisyllis kingghidorahi n. sp., a new branching annelid from Japan". Organisms Diversity and Evolution. 22: 307–405.