A new species of Sunamphitoe Bate, 1857 (Crustacea: Amphipoda: Ampithoidae) from Hokkaido, Japan. (20th February 2020)

• Record Type: Journal Article
• Authors: Kodama, Masafumi; Onitsuka, Toshihiro; Kawamura, Tomohiko
• Is Part Of: Journal of the Marine Biological Association of the United Kingdom. Volume 100:Number 1(2020)
• Page Start: 63
• Page End: 72
• Publication Date: 2020-02-20
• Subjects: COI, -- DNA barcoding, -- ontogenetic morphological changes, -- Sunamphitoe gigantean; Biology -- Periodicals; Marine biology -- Periodicals; 578.77
• DOI: 10.1017/S002531541900105X
• Languages: English
• ISSNs: 0025-3154

Abstract

Abstract: A new species of ampithoid amphipod, Sunamphitoe gigantea sp. nov., is described from Katsurakoi, Hokkaido, Japan. The new species most closely resembles S. eoa, but can be distinguished from it by the shorter flagellum of antenna 1, the maxilla 1 inner plate that bears two slender setae, the short dactylus of male gnathopod 2, and the presence of a group of long setae on anterior margins of pereopods 3 and 4 bases. Nucleotide sequences of mitochondrial cytochrome c oxidase subunit I obtained from the type specimens also differentiated this new species from the congeners. Ontogenetic morphological changes of the male gnathopod 2 are briefly discussed.