<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>Several species new to the area were collected while monitoring Dutch marine waters using a dredge. The varunid crab <italic>Asthenognathus atlanticus</italic> <xref ref-type="bibr" rid="j_oandhs-2021-0030_ref_020">Monod, 1933</xref> was recorded for the first time in the North Sea. Until 2008, this relatively rare crab was known from the west coast of Africa and the western Mediterranean to northern Brittany in the north. In recent years, its distribution range has expanded, as indicated by records from the Bay of the Seine and the area around Dieppe-Le Tréport. Our finding from Brown Bank (southern North Sea) indicates a further, northward expansion of its distribution range. We list the hosts with which the crab is associated. Earlier arguments for climate change as an explanation for the northward range expansion are supported.</p>
</abstract>

Several species new to the area were collected while monitoring Dutch marine waters using a dredge. The varunid crab Asthenognathus atlanticus Monod, 1933 was recorded for the first time in the North Sea. Until 2008, this relatively rare crab was known from the west coast of Africa and the western Mediterranean to northern Brittany in the north. In recent years, its distribution range has expanded, as indicated by records from the Bay of the Seine and the area around Dieppe-Le Tréport. Our finding from Brown Bank (southern North Sea) indicates a further, northward expansion of its distribution range. We list the hosts with which the crab is associated. Earlier arguments for climate change as an explanation for the northward range expansion are supported.

First record of the rare crab <italic>Asthenognathus atlanticus</italic> <xref ref-type="bibr" rid="j_oandhs-2021-0030_ref_020">Monod, 1933</xref> (Crustacea: Brachyura: Varunidae) in the North Sea

Oceanological and Hydrobiological Studies

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

First record of the rare crab   (Crustacea: Brachyura: Varunidae) in the North Sea

Several species new to the area were collected while monitoring Dutch marine waters using a dredge. The varunid crab Asthenognathus atlanticus Monod, 1933 was...

region	period	depth (m)	sediment	number	associates	source
Gold Coast (= Ghana) to Roscoff, including W Mediterranean Sea	1932–1977	0–200	mud, muddy sand, sandy mud	1–40	Cerianthus membranaceus (Gmelin, 1791), Sipunculus nudus Linnaeus, 1766, Oestergrenia digitata (Montagu, 1815)	Glémarec & Hily (1979), partly cited from earlier sources
Bay of the Seine	2008–2011	10–25	mud, muddy sand, sand	30	Terebellides stroemi Sars, 1835, Lanice conchilega Pallas, 1766, Upogebia deltaura (Leach, 1816)	Jourde et al. (2012)
Dieppe–Le Tréport	2015–2018	12–25	including coarse sand		Chaetopterus variopedatus (Renier, 1804), Cerianthus lloydii Gosse, 1859	Pezy & Dauvin (2016)
southern North Sea	2019	32	sand with shell grit	1	Callianassa subterranea and/or Gilvossius tyrrhenus, Echinocardium cordatum	this paper

First record of the rare crab Asthenognathus atlanticus Monod, 1933 (Crustacea: Brachyura: Varunidae) in the North Sea

Article Category: Short communication

Data publikacji: 02 wrz 2021

Zakres stron: 352 - 358

Otrzymano: 07 gru 2020

Przyjęty: 26 mar 2021

DOI: https://doi.org/10.2478/oandhs-2021-0030

Słowa kluczowe
range expansion, climate change, new record, commensalism

© 2021 Marco Faasse et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1

Figure 2

Figure 3

Figure 4

Chronological distribution data and ecological data from the literature and our sampling

First record of the rare crab Asthenognathus atlanticus Monod, 1933 (Crustacea: Brachyura: Varunidae) in the North Sea

Article Category: Short communication

Data publikacji: 02 wrz 2021

Zakres stron: 352 - 358

Otrzymano: 07 gru 2020

Przyjęty: 26 mar 2021

DOI: https://doi.org/10.2478/oandhs-2021-0030

Słowa kluczowerange expansion, climate change, new record, commensalism

© 2021 Marco Faasse et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1

Figure 2

Figure 3

Figure 4

Chronological distribution data and ecological data from the literature and our sampling

Słowa kluczowe
range expansion, climate change, new record, commensalism