Browsing NTNU Open by Author "Nygren, Arne"
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A mega-cryptic species complex hidden among one of the most common annelids in the North East Atlantic
Nygren, Arne; Parapar, Julio; Meissner, Karin; Pons, Joan; Bakken, Torkild; Kongsrud, Jon Anders; Gaeva, Daria; Oug, Eivind; Sirkoski, Andrey; Johansen, Robert Andre; Hutchings, Pat; Lavasque, Nicolas; Capa Corrales, Maria (Journal article; Peer reviewed, 2018)We investigate mitochondrial (COI, 16S rDNA) and nuclear (ITS2, 28S rDNA) genetic structure of North East Atlantic lineages of Terebellides, a genus of sedentary annelids mainly inhabiting continental shelf and slope ... -
The curious and intricate case of the European Hediste diversicolor (Annelida, Nereididae) species complex, with description of two new species
Teixeira, Marcos A. L.; Bakken, Torkild; Vieira, Pedro E.; Langeneck, Joachim; Sampieri, Bruno R.; Kasapidis, Panagiotis; Ravara, AscensÃO; Nygren, Arne; Costa, Filipe O. (Peer reviewed; Journal article, 2022)Past molecular studies using mtDNA sequences and alloenzymes signalled the existence of at least two cryptic species within the Hediste diversicolor morphotype, in European coasts. However, to this day, no new species ... -
Reappraisal of the hyperdiverse Platynereis dumerilii (Annelida: Nereididae) species complex in the Northern Atlantic, with the description of two new species
Teixeira, Marcos A. L; Langeneck, Joachim; Vieira, Pedro E.; Hernández, José Carlos; Sampieri, Bruno R.; Kasapidis, Panagiotis; Mucciolo, Serena; Bakken, Torkild; Ravara, Ascensão; Nygren, Arne; Costa, Felipe (Peer reviewed; Journal article, 2022)Morphologically similar species are often overlooked but molecular techniques have been effective in signalling potential hidden diversity, boosting the documentation of unique evolutionary lineages and ecological diversity. ... -
Species delimitation analyses of NE Atlantic Chaetozone (Annelida, Cirratulidae) reveals hidden diversity among a common and abundant marine annelid
Grosse, Maël Ariel; Bakken, Torkild; Nygren, Arne; Kongsrud, Jon Anders; Capa, Maria (Peer reviewed; Journal article, 2020)The polychaetes of the family Cirratulidae (Annelida) are common inhabitants in continental shelf benthic environments and considered an important group of organisms in environmental monitoring surveys. The family represents ... -
Species delimitation in Amblyosyllis (Annelida, Syllidae)
Aguado, M.T.; Capa, Maria; Lago-Barcia, D; Gil, João; Pleijel, F; Nygren, Arne (Journal article; Peer reviewed, 2019)Amblyosyllis is a worldwide distributed group of annelids mainly found in coastal environments. It is well known among the polychaete specialists mostly because of its notable beauty, showing bright colourful patterns and ... -
Systematic re-structure and new species of Sphaerodoridae (Annelida) after morphological revision and molecular phylogenetic analyses of the North East Atlantic fauna
Capa, Maria; Nygren, Arne; Parapar, Julio; Bakken, Torkild; Meissner, Karin; Moreira, Juan (Journal article; Peer reviewed, 2019)Detailed morphological study of more than 2600 North East Atlantic (NEA) sphaerodorids (Sphaerodoridae Annelida) and phylogenetic analyses of DNA sequences of representatives of several identified morphospecies enforced ... -
Three, two, one! Revision of the long-bodied sphaerodorids (Sphaerodoridae, Annelida) and synonymization of Ephesiella, Ephesiopsis and Sphaerodorum
Capa, Maria; Bakken, Torkild; Meissner, Karin; Nygren, Arne (Journal article; Peer reviewed, 2018)Background Long-bodied sphaerodorids (Annelida, Sphaerodoridae) is the common name for members of the three closely and morphologically homogenous currently accepted genera of benthic marine bristle worms: Ephesiella, ...