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Lacydoniidae (Annelida) Off the Coast of North-eastern Japan : A Description of Lacydonia japonica sp. nov.

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Title: Lacydoniidae (Annelida) Off the Coast of North-eastern Japan : A Description of Lacydonia japonica sp. nov.
Authors: Hookabe, Natsumi Browse this author
Jimi, Naoto Browse this author
Tsuchida, Shinji Browse this author
Fujiwara, Yoshihiro Browse this author
Kajihara, Hiroshi Browse this author →KAKEN DB
Keywords: Benthos
Deep sea
Marine invertebrates
Issue Date: 10-Jul-2020
Publisher: Institute of Zoology, Academia Sinica
Journal Title: Zoological Studies
Volume: 59
Start Page: 28
Publisher DOI: 10.6620/ZS.2020.59-28
Abstract: Lacydonia japonica sp. nov. (Annelida, Lacydoniidae) is described based on material found in sediments collected off the Pacific coast of northern Honshu, Japan, at depths of 262 m and 407 m. The sediments were obtained by a remotely operated vehicle equipped with a suction sampler during a Tohoku Ecosystem-Associated Marine Sciences (TEAMS) project in 2019. Lacydonia japonica sp. nov. belongs to the eyeless group of lacydoniids and is discriminated from the morphologically most similar congener, Lacydonia papillata Uschakov, 1958 by its reddish pigments on both the dorsal and ventral parapodial cirri and four pigment spots on the pygidium. To assess the phylogenetic position of the new species among other lacydoniids for which sequence data are available in public databases, analyses were performed using the mitochondrial cytochrome c oxidase subunit I (COI) and 16S rRNA, as well as the nuclear 18S rRNA and 28S rRNA genes. We additionally obtained some lacydoniids by sledging off western Japan, but these were severely fragmented and broken during collection. Using the paucity of morphological data, they were left unidentified as Lacydonia sp. but included in the molecular analyses. Genetic distances between Lacydonia eliasoni Hartmann-Schroder, 1996, Lacydonia japonica, and Lacydonia sp. off western Japan were 10.4-17.1% uncorrected p-distance (11.3-18.6% K2P) in terms of 658-bp COI sequences.
Type: article
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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