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ECB-ART-54135
Zoolog Sci 2025 Jun 01;423:335-341. doi: 10.2108/zs250004.
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First Record of the Deep-Sea Sea Spider Bathypallenopsis californica (Arthropoda: Pycnogonida) from the Northwestern Pacific, with a Note on an Attached Crinoid.

Sekiguchi S , Kohtsuka H , Kakui K .


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We report the first record of the pallenopsid pycnogonid species Bathypallenopsis californica (Schimkewitsch, 1893) from the northwestern Pacific. Based on one male specimen collected from 1987-2007 m depth off the southeastern coast of Hokkaido, Japan, we redescribe the species and present its cytochrome c oxidase subunit I (COI) sequence for use in future DNA barcoding. We found a cystidean-stage crinoid on the leg-1 femur of the sea spider, representing the first record of a cystidean found on a sea spider. BLAST searches for COI and 28S sequences revealed that the crinoid was Florometra asperrima (Clark, 1907).

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