Dear Dr Kirk Schnorr,
38 years ago, when I was a Nordic research fellow at the Marine
Biological Laboratory in Helsingør, I had the opportunity to study the
polychaetes of the Øresund,.
The Danish pectinariidae are: Pectinaria belgica, Pectinaria auricoma,
Pectinaria koreni, and Petta pusilla. (disregarding subgenera of Pectinaria)
The tubes of these spp are different and can in most cases be identified..
See descriptions in my book Polychata Terebellomorpha,, Marine
Invertebrates of Scandinavia vol 7 (1986).
The tubes in your photograph loook like those of P.koreni..
Irregular tubes from Danish waters may . be maldanids, but also i.a.
terebellids, ampharetids, or oweniids. Several of these are species
specific, but some might be possible to confuse.
regards and good luck with your work
Torleif Holthe
professor emeritus
NTNU
Trondheim, Norway.
