Category Archives: Publications

Evolutionary relationship of Sphaerodoridae

Small grown species with spherical protrusions, called macrotubercles, on their back are the most characteristic features of the polychaete family Sphaerodoridae. A small group of polychaetes with about 110 species in 10 genera. With an overall aim to study evolutionary relationships of the group, we first started to study relationships within the family, but also its position within the polychaete group Phyllodocida. Continue reading Evolutionary relationship of Sphaerodoridae

Sphaerodorid polychaetes from Australia

SEM photo of Sphaerodoropsis exmouthensis . Source Capa & Bakken 2015.
SEM photo of Sphaerodoropsis exmouthensis. Source Capa & Bakken 2015.

Sphaerodoridae is a group of small polychaetes that rarely exceeds 5 mm long. They have often been overlooked in samples when samples are sieved, they simply go through the sieve mesh. In Australia this group has been poorly known. In order to shed more light on the group we examined available museum material representing samples from around the Australian coast. Four new species was described, and three species formally re-described. After our revision the diversity of Sphaerodoridae in Australian waters are 10 species. Continue reading Sphaerodorid polychaetes from Australia

A new polychaete from the Norwegian Sea

Pseudoscalibregma parvum. Photo: Katrine Kongshavn/University Museum of Bergen.
Pseudoscalibregma parvum. Photo: Katrine Kongshavn/University Museum of Bergen.

Knowledge of the biological diversity in the Norwegian Sea is limited. As a result new knowledge on distribution and abundance of benthic species are revealed as more studies are done. We have described a new species of polychaete, Scalibregma hanseni, based on newly available material. In addition a redescription of Pseudoscalibregma parvum is provided, as well as new knowledge on distribution of known scalibregmatids in the Nordic Seas. Continue reading A new polychaete from the Norwegian Sea

New nudibranchs to Norway – more knowledge on diversity of sea slugs

Five new species of sea slugs (nudibranchs) have been found in Norwegian coastal waters for the first time. Intensive field work over the last few years have provided new knowledge on distribution and abundance on several species not often observed. These results are a part of our long-going project on diversity of Norwegian nudibranchs we have had running since 1997. Continue reading New nudibranchs to Norway – more knowledge on diversity of sea slugs