A new species of Anobothrus (Polychaeta, Ampharetidae) from the Weddell Sea (Antarctica), with notes on habitat characteristics and an updated key to the genus

Benthic samples were collected during two expeditions near the Antarctic Peninsula and in the South-Eastern Weddell Sea. During these studies, a new species of Ampharetidae Malmgren, 1867, Anobothrus konstantini Säring & Bick sp. nov., was found. Here we present a detailed description of this sp...

Full description

Bibliographic Details
Published in:European Journal of Taxonomy
Main Authors: Friederike Säring, Andreas Bick, Heike Link
Format: Article in Journal/Newspaper
Language:English
Published: Consortium of European Natural History Museums 2022
Subjects:
Anobothrus konstantini Säring & Bick sp. nov
Antarctic Peninsula
ecology
Filchner Trough
micro-CT analysis
SEM
Zoology
QL1-991
Botany
QK1-989
Antarctic
Malmgren
The Antarctic
Weddell
Weddell Sea
Antarc*
Antarctica
Online Access:https://doi.org/10.5852/ejt.2022.789.1637
https://doaj.org/article/dcfb498edb0740b8ab93c1d7e2688e8c
Description
Summary:Benthic samples were collected during two expeditions near the Antarctic Peninsula and in the South-Eastern Weddell Sea. During these studies, a new species of Ampharetidae Malmgren, 1867, Anobothrus konstantini Säring & Bick sp. nov., was found. Here we present a detailed description of this species. We used the traditional light microscope and scanning electron microscope (SEM) to identify and describe the diagnostic characters: a circular glandular band on segment 6; an elongate ridge between the notopodia on segment 12 and modified notochaetae on this segment; 16 thoracic, two intermediate and ten abdominal segments. For the first time, micro-computed tomography (micro-CT) was used for a species description of Anobothrus. Micro-CT provided information on the shape of the prostomium (Ampharete-type) and the arrangement of branchiae (four pairs in two rows, without a gap). In addition, we provide quantitative information on the environmental niche based on sediment parameters (chlorophyll a content, organic matter content, chloroplast equivalent, grain size) for the new Anobothrus species, relevant for, e.g., species distribution modelling. Finally, an identification key for all Anobothrus species is provided.

Similar Items