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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.
The tribe Amarotypini (Coleoptera: Carabidae: Migadopinae) is revised for New Zealand. Three genera and fourteen species are recognized.
Two genera and thirteen species are described as new: Amarophilus Larochelle and Larivière new genus, Amarophilus lomondensis Larochelle and Larivière new species, Amarophilus otagoensis Larochelle and Larivière new species, Amarophilus rotundicollis Larochelle and Larivière new species, Amarophilus wanakensis Larochelle and Larivière new species, Amarotypus fiordlandensis Larochelle and Larivière new species, Amarotypus glasgowensis Larochelle and Larivière new species, Amarotypus murchisonorum Larochelle and Larivière new species, Amarotypus simoninensis Larochelle and Larivière new species, Amarotypus takaheensis Larochelle and Larivière new species, Amaroxenus Larochelle and Larivière new genus, Amaroxenus arnaudensis Larochelle and Larivière new species, Amaroxenus glacialis Larochelle and Larivière new species, Amaroxenus huttensis Larochelle and Larivière new species, Amaroxenus kahurangiensis Larochelle and Larivière new species.
A revision of all taxa is provided. Descriptions, identification keys, illustrations of male genitalia, habitus photos, distributional data and maps are given. Information on ecology, biology, dispersal power, and collecting techniques is included for each species.
ZooBank registration. urn:lsid:zoobank.org:pub:6BBC7A99-0736-44D1-BAD1-3C719F9A69C2