3 September 1997
Re Dutra's and Kristian Fauchald's messages:
Kristian wrote:
>I would be very interested in seeing if anybody has any real
>documentation of chaetae in the depth of cores; I have seen them in
>surface sediments, but since I rarely go into cores (only under duress) I
>do not have any personal observations from that source.
I have studied animal remains in marine sediment cores. Jaws of nereids
were commom, and very well preserved. The length of the core was 210 cm.
The bottom part was deposited 500 BC, but jaws were also present in deeper
layers not yet dated. The results were published by P.Kristensen, S.
Heier-Nielsen and J. Hylleberg (1995) Late-Holocene salinity fluctuations
in Bjornsholm Bay, Limfjorden, Denmark, as deduced from micro- and
macrofosil analysis. The Holocene, 5,3 (1995) pp. 313-322.
In the core, I noticed numerous acicular setae of Nereis, maybe Nephtys (it
is hard to say), and occasionally setae of Aphrodite (unpublished). Tubes
of Pectinaria were very well preserved. Otherwise only calcareous tubes of
Pomatoceros, Spirorbis etc. were extracted. I used 50 x magnification, so
I dare not say if fine setae can be found if a more powerful lens is used.
Best regards
Jorgen Hylleberg
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E-mail: hylle at pop.bio.aau.dk
Jorgen Hylleberg, Dept.of Biological Sciences, Marine Ecology, Finlandsgade
14, 8200 Arhus N, Denmark.
Fax, office: +45 8942 4387
Telephone, office direct: +45 8942 4382. Telephone, home: +45 8628 3630
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