Ampharetidae (Annelida: Polychaeta) from Japanese waters. Part IV. Miscellaneous genera

Abstract

In the fourth paper about Ampharetidae from Japan, we describe 12 species in seven genera. The genus Orochi gen. nov. and the eight species Amage ehlersi sp. nov., A. longitorus sp. nov., Glyphanostomum hesslei sp. nov., Lysippe nipponica sp. nov., Melinnopsis augeneri sp. nov., M. mcintoshi sp. nov., Orochi palacephalus gen. et sp. nov., and Samytha annenkovae sp. nov. are newly described. Orochi gen. nov. is characterized by the shovel-like prostomium, the high membrane, from which all four pairs of branchiae emerge and the presence of neuropodia of the abdominal type in the last thoracic unciniger. In the discussions of the remaining genera, we comment on the taxonomic changes suggested by Jirkov (2011). Furthermore, we provide a list of all Ampharetidae species that have been recorded from Japan.

Amage imajimai sp. nov., a new species of Ampharetidae (Annelida: Polychaeta) from Japanese waters

“…Therefore, Japan's polychaete fauna includes Arctic and sub-Arctic species as well as tropical and subtropical species. In the recent series on Ampharetidae from Japan (Imajima et al 2012(Imajima et al , 2013Reuscher et al 2015aReuscher et al , 2015b, 60% of the examined species were new to science and the number of species known from Japan more than doubled. This shows that the current knowledge of species diversity of ampharetid polychaetes from Japan is far from exhaustive and more sampling effort is needed to complete the picture.…”

“…In a recent study on Ampharetidae from Japan many new species and new records were discovered (Imajima et al 2012(Imajima et al , 2013Reuscher et al 2015aReuscher et al , 2015b. In the last publication of the series (Reuscher et al 2015b), a list of all 58 ampharetid species recorded from Japan was provided.…”

“…In the last publication of the series (Reuscher et al 2015b), a list of all 58 ampharetid species recorded from Japan was provided. six of these species known to occur in Japanese waters belong to the genus Amage Malmgren, 1866: A. cf.…”

Contribution to the taxonomic knowledge of Ampharetidae (Annelida) from Antarctica with the description of Amage giacomobovei sp. nov.

“…1B. Hilbig (2000) and Reuscher et al (2015) included in generic diagnosis of Amage the presence of smooth buccal tentacles. In the case of the new species herein described, BT are obviously not smooth but, at the same time, this species is beyond any doubt an Amage.…”

“…Jirkov (2011) proposed Egamella Fauchald, 1972, Mexamage Fauchald, 1972, Paramage Caullery, 1944and Phyllampharete Hartman & Fauchald, 1971 as junior synonyms of Amage. Reuscher et al (2015) accepted synonymy of the first three genera but rejected the synonymy of Phyllampharete. We agree with Reuscher et al (2015) and hence Phyllampharete is not included in the list of Amage synonyms here either.…”