Journal Article
Metabetaeus lapillicola, a new species of alpheid shrimp (Decapoda: Caridea) from Japan, inhabiting unusual pebble beaches
Yamashita, R., Komai, T. and Kon, K.
Record Number:
6135
Year:
2023
Journal:
Zootaxa
Pages:
317-330
Volume:
5258
Abstract:
The alpheid shrimp genus Metabetaeus Borradaile, 1899 was previously known from two species associated with anchialine
pools and caves, M. minutus (Whitelegge, 1897) and M. lohena Banner & Banner, 1960, and one species inhabiting
in coral reef, M. mcphersonae Anker, 2010. In this study, a new species of the genus is described based on fourteen
specimens collected from Shizuoka and Mie Prefectures, Honshu, central Japan. Metabetaeus lapillicola n. sp. inhabits
interstitial spaces among small pebbles deposited in lower intertidal to upper subtidal zone, representing rather unusual
habitat not only for Metabetaeus, but even for carideans. It is distinguished from three congeneric species by the presence
of a pterygostomial spine on the carapace, greatly unequal chelipeds with the major one being substantially elongate,
and the lack of a distinct distolateral spine on the uropodal endopod. Phylogenetic analyses using the mitochondrial 16S
rRNA and COI genes support the recognition of the new species. The generic diagnosis of Metabetaeus is emended to
accommodate the new species.
Key words: COI gene, interstitial, Metabetaeus lapillicola, 16S rRNA gene
Times Cited:
1
Relevent Species: