Vol. 57, 2018 (update: 2018.02.05; 02.14) Description of Elisesione imajimai sp. nov. From Japan (Annelida: Hesionidae) and A Redescription of E. problematica (Wesenberg-Lund, 1950) and Its Confirmation Within HesioniniNaoto Jimi1,*, Danny Eibye-Jacobsen2, and Sergio I. Salazar-Vallejo3 doi:10.6620/ZS.2018.57-08
1Department
of Natural History Sciences, Graduate School of Science, Hokkaido
University, N10 W8, Sapporo 060-0810, Japan (Received 8 July 2017; Accepted 27 January
2018; Communicated by James D. Reimer) Naoto
Jimi, Danny Eibye-Jacobsen, and Sergio I. Salazar-Vallejo (2018)
Elisesione imajimai
sp. nov. is newly described based on specimens collected in Sagami Bay,
Japan, at a depth of 150-250 m. This new species resembles E. problematica (Wesenberg-Lund,
1950) from Iceland, but differs because in E. imajimai
sp. nov. the ventral cirri surpass the tips of the neurochaetal lobes,
reaching to the medial part of the neurochaetal bundle; the palps are
1/2-4/5 as long as the antennae; the aciculae are pale brownish; and
the dorsal integument shows 9-10 transverse wrinkles per segment,
whereas in E. problematica
the ventral cirri hardly reach the tips of the neurochaetal lobes; the
palps are as long as the antennae; the aciculae are black; and there
are 15 transverse wrinkles per segment. A morphological redescription
of E. problematica
based on its type material and a revised key to identify species in the
genus are also provided. A phylogenetic analysis based upon four genes
(COI, 16S, 18S, 28S) confirms its position within Hesionini. Key words: Hesionella, Wesenbergia, Hesionini, Polychaeta,
Sagami Bay. *Correspondence: E-mail: beniimo7010@gmail.com Supplementary Material: Table S1 |