著者

Hiroki Nakajima Ryuta Yoshida Tohru Naruse

出版者

The Plankton Society of Japan, The Japanese Association of Benthology

雑誌

Plankton and Benthos Research (ISSN:18808247)

巻号頁・発行日

vol.17, no.1, pp.34-44, 2022-02-22 (Released:2022-02-23)

参考文献数

30

被引用文献数

2

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Four mantis shrimp species are recorded from the Ryukyu and Ogasawara islands, southern Japan: Gonodactylaceus ternatensis (De Man, 1902) (Gonodactylidae); Lysiosquilloides siamensis (Naiyanetr, 1980) (Lysiosquillidae); Alimopsoides tuberculatus Moosa, 1991 (Squillidae); and Busquilla plantei Manning, 1978 (Squillidae). This is the first specimen-based record of G. ternatensis and the first distributional records of the latter three species from Japan. The genus Lysiosquilloides Manning, 1977 is recorded for the first time from Japanese waters, and the genus Alimopsoides Moosa, 1991 is newly found from the northern hemisphere. Diagnoses, taxonomic remarks, ecological notes and new standard Japanese names are provided.

著者

Shinri Tomioka Ryuta Yoshida Hiroshi Kajihara

出版者

The Japanese Society of Systematic Zoology

雑誌

Species Diversity (ISSN:13421670)

巻号頁・発行日

vol.22, no.2, pp.127-132, 2017-11-25 (Released:2017-12-05)

参考文献数

11

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We describe a new capitellid species, Mastobranchus uru sp. nov., from a tidal flat on Iriomote Island, Okinawa, southern Japan. This species differs from its three congeners in having capillary chaetae only on the notopodia in chaetiger 1 and in the number and arrangement of teeth on hooks. We also provide for this new species a barcode nucleotide sequence from the mitochondrial 16S rRNA gene.

著者

Jun Kitaura Ryuta Yoshida Noboru Nunomura

出版者

Carcinological Society of Japan

雑誌

Crustacean Research (ISSN:02873478)

巻号頁・発行日

vol.47, pp.111-123, 2018-12-05 (Released:2018-12-05)

参考文献数

30

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DNA sequences from a portion of the mitochondrial 16S rRNA gene were used to examine genetic differentiation among the local coastal populations of the Japanese wood-boring isopod Sphaeroma wadai Nunomura, 1994. Of the 15 haplotypes identified, only 3 were shared among the sampled localities. The most dominant haplotype was shared by all populations from the Japanese mainland. All haplotypes identified from Okinawa Island and Iriomote Island were endemic to each island. For the Japanese mainland group, the haplotype network showed a star-like shape, with rare haplotypes radiating from the central most common haplotype by only one or two mutation steps. Haplotypes identified from Iriomote Island were separated by many steps from those identified from all other sampled localities, and haplotypes identified from Okinawa Island were separated by several steps from those identified from the Japanese mainland. Phylogenetic analyses revealed the existence of two lineages: one comprising specimens from Iriomote Island and the other comprising specimens from the Japanese mainland and Okinawa Island. These two lineages diverged at an uncorrected p-distance of 9.1%–10.3%, probably representing a different species. There were no clear morphological differences between the two lineages except for the propodus length of the seventh pereopod of male individuals.