Dear Roger,
it seems that Geoff's remark comes close: Zibrowius (1973) deals with
the difficulty in distinguishing Salmacina and Filograna being mainly
based on the presence/absence of an operculum. He placed both within
Filograna Berkeley, 1835. Ten Hove (1994) regards Filograna/Salmacina
as a species complex in need of a detailed review. For an account of the
problems involved you might want to check Ben-Eliahu & Fiege (1996).
Cheers, Dieter
References:
Zibrowius, H. (1973): Serpulidae (Annelida Polychaeta) des côtes ouest de l'Afrique et des archipels voisins.
Mus. Roy. Afrique centrale - Tervuren, Belgique Ann., ser IN-8°, (207): 1-93.
Hove, H.A. ten (1994): Serpulidae (Annelida: Polychaeta) from the Seychelles and Amirante Islands. In: J. van
der Land (ed.) Oceanic Reefs of the Seychelles: Report on a cruise with RV Tyro to the Seychelles in 1992
and 1993. Cruise Rep. Netherl. Indian Ocean Progr. II. Nat. Mus. Leiden: 1-9.
Ben-Eliahu, M.N. & Fiege, D. (1996): Serpulid tube-worms (Annelida: Polychaeta) of the central and eastern
mediterranean with particular attention to the Levant Basin. Senckenbergiana maritima 28(1-3): 1-51.
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