2026-09-23 カナダ・ブリティッシュコロンビア大学（UBC）
Callipallene pilosuspedes, a species of sea spider newly discovered in the Salish Sea by UBC researchers. Photo credit: Cormac Toler-Scott.
＜関連情報＞
- https://news.ubc.ca/2026/09/new-sea-spiders-discovered-salish-sea/
- https://link.springer.com/article/10.1007/s13127-026-00707-3
セイリッシュ海のウミグモ：沿岸に生息する7種の形態学的比較と分子系統解析（節足動物門、ウミグモ目） Sea spiders of the Salish Sea: Comparative morphology and molecular phylogenetic analysis of seven coastal species (Arthropoda, Pycnogonida)
Cormac Toler-Scott, Eunji Park, Heather Gordon & Brian S. Leander
Organisms Diversity & Evolution Published:26 August 2026
DOI:https://doi.org/10.1007/s13127-026-00707-3
Abstract
Pycnogonids, or sea spiders, form a clade of strictly marine arthropods with a global distribution and a predominantly benthic lifestyle. In the Salish Sea of North America, sea spider diversity is poorly characterized, and morphological and molecular data for many species are lacking, limiting our understanding of this group. Using scanning electron microscopy and molecular data, we present morphological and molecular phylogenetic analyses of seven species of coastal sea spider from the Salish Sea ecoregion, representing the first comprehensive scientific study of pycnogonids in this area. We redescribe Achelia alaskensis (Cole, 1904), Achelia gracilipes (Cole, 1904), Anoplodactylus erectus (Cole, 1904), Anoplodactylus viridintestinalis (Cole, 1904), and Phoxichilidium quadradentatum (Hilton, 1942a, 1942b). Additionally, we describe two new species of sea spider, Tanystylum kiixin sp. nov., which closely associates with the hydroid Plumularia setacea (Linnaeus, 1758), and Callipallene pilosuspedes sp. nov. Finally, to help minimize ambiguities regarding the identification of the species herein, we provide a dichotomous key for pycnogonids living in the Salish Sea and along the west coast of Vancouver Island.
