Similar Ones Are Not Related and Vice Versa—New Dendronotus Taxa (Nudibranchia: Dendronotidae) from the North Atlantic Ocean Provide a Platform for Discussion of Global Marine Biodiversity Patterns

One new species of the genus Dendronotus (Nudibranchia: Dendronotidae) is described from Norway and Northern Ireland, as well as from the adjacent North Sea, and one new subspecies of Dendronotus arcticus is described from Norway by applying a combination of fine-scale morphological and molecular ph...

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Bibliographic Details
Published in:Diversity (Basel) 2023-04, Vol.15 (4), p.504
Main Authors: Korshunova, Tatiana, Grøtan, Viktor V., Johnson, Kjetil B., Bakken, Torkild, Picton, Bernard E., Martynov, Alexander
Format: Article
Language:English
Subjects:
Biodiversity
Climate change
Datasets
Dendronotidae
Dendronotus
Digital cameras
Jaw
molecular phylogeny
Morphology
multilevel organismal diversity
Museums
New species
New subspecies
Nudibranchia
Phylogenetics
Phylogeny
phylogeography
species delimitation
Sympatric populations
Taxa
taxonomy
Teeth
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Summary:One new species of the genus Dendronotus (Nudibranchia: Dendronotidae) is described from Norway and Northern Ireland, as well as from the adjacent North Sea, and one new subspecies of Dendronotus arcticus is described from Norway by applying a combination of fine-scale morphological and molecular phylogenetic data. The present case demonstrates multilevel morphological and molecular similarities and differences considering on the one hand a grouping of three similar looking sympatric taxa (D. yrjargul, D. arcticus gartensis n. subsp. and D. keatleyae n. sp.), and on the other hand two different looking apparently allopatric subspecies (D. arcticus arcticus and D. arcticus gartensis n. subsp.). The type species of the genus, D. frondosus, which is the commonest dendronotid in Norway and the United Kingdom, consistently demonstrates substantial molecular and fine-scale morphological differences from D. keatleyae n. sp. The present study, apart from providing purely taxonomic information, also provides new data for a broad discussion of global biodiversity patterns.
ISSN:1424-2818
1424-2818
DOI:10.3390/d15040504