New species of bone-eating worm Osedax from the abyssal South Atlantic Ocean (Annelida, Siboglinidae)

A new species of bone-eating annelid, Osedax braziliensis sp. n., found in a sunken whale carcass at a depth of 4,204 m at the base of the São Paulo Ridge in the South Atlantic Ocean off the Brazilian coast is described. The organism was retrieved using the human-occupied vehicle Shinkai 6500 during the QUELLE 2013 expedition. This is the 26th species of the genus and the first discovery from the South Atlantic Ocean, representing the deepest record of Osedax worldwide to date. This species morphologically resembles Osedax frankpressi but is distinguished by the presence of a yellow bump or patch behind the prostomium and its trunk length. Molecular phylogenetic analysis using three genetic markers (COI, 16S, and 18S) showed that O. braziliensis sp. n. is distinct from all other Osedax worms reported and is a sister species of O. frankpressi

A new species of the rare, deep-sea polychaete genus Benthoscolex from the Sea of Kumano, Japan (Annelida, Amphinomidae)

A new species of amphinomid polychaete, Benthoscolex seisuiae sp. n., is described from the Sea of Kumano, Japan, from depths of 487-596 m. The species is distinguishable from its congeners by the following features: i) palps 1.8 times as long as lateral antennae; ii) branchiae do not reach to the tip of the notochaetae. This is the first record of Benthoscolex from Japan. A partial mitochondrial cytochrome c oxidase subunit I gene sequence from the holotype of B. seisuiae sp. n. is provided for reliable species identification in the future

New record of the hydrothermal vent-endemic polychaete Archinome jasoni Borda et al., 2013 (Annelida, Amphinomidae) from the Northwest Pacific

The hydrothermal vent-endemic polychaete Archinome jasoni Borda et al., 2013 is known from the Atlantic, Indian, and Southwest Pacific oceans. In this study, we report A. jasoni from Okinawa Trough, Japan, which represents the first record of this species and the genus from the Northwest Pacific. We determined 16S and 28S rRNA gene sequences from 1 of the 7 specimens collected. We compared our Northwest Pacific specimens to specimens from the Southwest Pacific, Atlantic, and Indian oceans, and our specimen was genetically most closely related to individuals from the Southwest Pacific

Two new species of Branchinotogluma (Polynoidae: Annelida) from chemosynthesis-based ecosystems in Japan

Jimi, Naoto, Chen, Chong, Fujiwara, Yoshihiro (2022): Two new species of Branchinotogluma (Polynoidae: Annelida) from chemosynthesis-based ecosystems in Japan. Zootaxa 5138 (1): 17-30, DOI: https://doi.org/10.11646/zootaxa.5138.1.

New annelid species from the deepest known whale-fall environment: Bathykermadeca thanatos sp. nov. (Annelida: Polynoidae)

Jimi, Naoto, Fujiwara, Yoshihiro, Kajihara, Hiroshi (2018): New annelid species from the deepest known whale-fall environment: Bathykermadeca thanatos sp. nov. (Annelida: Polynoidae). Zootaxa 4450 (5): 575-580, DOI: https://doi.org/10.11646/zootaxa.4450.5.

Description of Pericelis flavomarginata sp. nov. (Polycladida: Cotylea) and its predatory behavior on a scaleworm

Tsuyuki, Aoi, Oya, Yuki, Jimi, Naoto, Kajihara, Hiroshi (2020): Description of Pericelis flavomarginata sp. nov. (Polycladida: Cotylea) and its predatory behavior on a scaleworm. Zootaxa 4894 (3): 403-412, DOI: https://doi.org/10.11646/zootaxa.4894.3.

Fig. 1 in A New Species of Polyodontes (Annelida: Acoetidae) from Western Japan

Fig. 1. Polyodontes kuroshio sp. nov., NMST-Pol H-764 (holotype), live specimen. A, dorsal view; B, ventral view.Published as part of Jimi, Naoto, Tomioka, Shinri, Orita, Ryo & Kajihara, Hiroshi, 2019, A New Species of Polyodontes (Annelida: Acoetidae) from Western Japan, pp. 275-279 in Species Diversity 24 (2) on page 276, DOI: 10.12782/specdiv.24.275, http://zenodo.org/record/717529