Diversity of Orbiniella (Orbiniidae, Annelida) in the North Atlantic and the Arctic

By

Meca, Miguel Angel
Kongsrud, Jon Anders
Kongshavn, Katrine
Alvestad, Tom
Meißner, Karin
Budaeva, Natalii︠a︡

Type

Article

Date of Publication

2024

Original Publication

ZooKeys

Volume

1205

Pages

51--88

Subjects

Greenland-Iceland-Scotland Ridge , integrative taxonomy , molecular marker , new species , Nordic seas , SEM , species complex , species delimitation

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers

Identifiers

DOI: https://doi.org/10.3897/zookeys.1205.120300

 

Abstract

In this work, the diversity of the genus Orbiniella in the Nordic Seas and the North Atlantic waters south of Iceland is studied based on the analyses of molecular markers (mitochondrial COI, 16S rDNA and nuclear ITS2) and morphological characters. Our results showed the presence of at least five genetic lineages in the studied material which could also be morphologically identified by their segmental annulation patterns, the number and the shape of acicular spines, and the length and the shape of pygidial lobes. The species name Orbiniella petersenae is assigned to one of the lineages restricting its geographical and vertical distribution to the deep-sea areas north of Iceland and Jan Mayen, and three lineages are described as new species (i.e., Orbiniella griegi Meca & Budaeva, sp. nov., Orbiniella mayhemi Meca & Budaeva, sp. nov., and Orbiniella parapari Meca & Budaeva, sp. nov.) elevating the number of known species in the genus to 25. Three deep-sea species of Orbiniella in our study are reported only north of the Greenland-Iceland-Scotland Ridge, one deep-sea species found south of the ridge. A single shallow-water species is distributed along the ridge and on the Norwegian shelf.