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[Annelida] a new Sphaerodorum ?

Ole Gorm Norden Andersen via annelida%40net.bio.net (by oa from bios.au.dk)
Fri Jan 26 05:36:53 EST 2018


Dear fellow polychaetologists,

Does the following description fit a known species?
A 6mm long Sphaerodorum, identical to the Sphaerodorum gracilis  figured and described by Hartmann-Schröder 1996 pp. 238-9 (as S. flavum) except there are no eyes, first segment after the prostomium has a parapodium with no setae and no dorsal cirrus (the size of the papilla next to the dorsal cirrus on the following segments), much like in Sphaerodoropsis philippi shown on her page 237, and the dorsal micropapillae are not scattered but arranged in transverse rows of which there are 4 per segment, each made up of 8-10 papillae. The larger papilla next to the dorsal cirrus is not part of a row. The setae are mostly simple needlelike and a few are like in Hartmann-Schröders fig. 107 b and c.
Can anyone help me out?

Kind regards,

Ole Gorm Norden Andersen, scientific assistant, marine biologist
Aarhus University, Bioscience
Frederiksborgvej 399
DK 4000 Roskilde
Denmark
e-mail: oa from bios.au.dk<mailto:oa from bios.au.dk>





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