New records of Ericthonius didymus Krapp-Schickel, 2013 (Crustacea: Amphipoda: Ischyroceridae) in European waters with a focus in Arcachon Bay, France and key to Ericthonius species. (8th May 2020)

• Record Type: Journal Article
• Authors: Gouillieux, Benoit; Ariyama, Hiroyuki; Costa, Ana Cristina; Daffe, Guillemine; Marchini, Agnese; Micael, Joana; Ulman, Aylin
• Is Part Of: Journal of the Marine Biological Association of the United Kingdom. Volume 100:Number 3(2020)
• Page Start: 401
• Page End: 412
• Publication Date: 2020-05-08
• Subjects: Amphipoda, -- Atlantic Ocean, -- Ericthonius didymus, -- European waters, -- identification key, -- new records; Biology -- Periodicals; Marine biology -- Periodicals; 578.77
• DOI: 10.1017/S0025315420000247
• Languages: English
• ISSNs: 0025-3154

Abstract

Abstract: The amphipod Ericthonius didymus Krapp-Schickel, 2013 is reported for the first time outside its type locality in European waters, from the French Atlantic coast and from the Azores, Portugal. In particular, a large population was recorded in Arcachon, France. Molecular analyses were made to confirm the validity of three closely related Ericthonius species: E. didymus, E. convexus and E. pugnax . An identification key is provided, distinguishing Ericthonius species into three groups, based on the presence or absence of stridulating ridges on coxa 2 and posterodistal lobe on basis of male pereopod 5.