Phylogeny of nereidids (Polychaeta, Nereididae) with paragnaths
The most parsimonious trees could not be rooted such that the selected ingroup, ‘Nereididae with paragnaths’, was monophyletic, causing the monophyly of the Nereidinae as currently defined to be rejected.
Polyphyly of the traditional family Flabellinidae affects a major group of Nudibranchia: aeolidacean taxonomic reassessment with descriptions of several new families, genera, and species (Mollusca,…
It was found that the current family Flabellinidae is polyphyletic and its phylogeny and taxonomic patterns cannot be understood without considering members from all the Aeolidacean families and, based on a robust phylogenetic hypothesis, morpho-anatomical evolution of aeolids is more complex than suspected in earlier works and requires reclassification of the taxon.
A review of paragnath morphology in Nereididae (Polychaeta)
This work provides the first comprehensive overview of these important morphological characters, with the aim of encouraging more consistent observation and use of a standardized terminology in future studies.
External diversity is restrained by internal conservatism: New nudibranch mollusc contributes to the cryptic species problem
The present study discovered notable multilevel character diversity within the common Dendronotus “frondosus” species complex, which implies the highest degree of variation of external characters with parallel colour patterns among different species and significantly constrained conservatism of internal characters.
The fauna of hydrothermal vents on the Mohn Ridge (North Atlantic)
Calcareous sponges comprised an unusually high portion of the sponge species found and they constitute one of the first pioneers among the sessile invertebrates settling on these vents.
Polychaetous annelids in the deep Nordic Seas: Strong bathymetric gradients, low diversity and underdeveloped taxonomy
Rediscovery of Tenellia adspersa (Nudibranchia) from the Finnish archipelago
The nudibranch species Tenellia adspersa is recorded from the Finnish archipelago for the first time in more than 100 years, and the new data presented here suggest that this species is abundant in the northern part of the Baltic proper.
Benthic polychaetes from the northern Mid-Atlantic Ridge between the Azores and the Reykjanes Ridge
Abstract The polychaete macrofauna of the northern Mid-Atlantic Ridge between the Azores (42°N) and the southern tip of the Reykjanes Ridge (54°N) was studied based on the material obtained during…
Occurrence and distribution of Pseudoscalibregma and Scalibregma (Annelida, Scalibregmatidae) in the deep Nordic Seas, with the description of Scalibregma hanseni n. sp.
Until recent years, only a few scalibregmatid species have been known from the Nordic Seas, largely from shelf and coastal waters. Access to a large collection from deep areas has made it possible to…
A catalogue of the type specimens of protozoans, invertebrates and fish in the Museum of Natural History and Archaeology, NTNU
- T. Bakken
The zoological type material deposited in the Museum of Natural History and Archaeology, Norwegian University of Science and Technology, consists of marine organisms except for two species of Hymenoptera (Insecta).