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Article History

Received: 8 December 2020

Revised: 28 May 2021

Accepted: 21 July 2021

First Online: 6 September 2021

Declarations

:

: The authors declare no conflict of interest.

: No animal testing was performed during this study.

: The study does not contain sampling material or data from field studies.

: All data for <i>Graneledone pacifica</i> are available at <b> (</b>Voight and Kurth ).

: Voight initiated the project, provided photographs of <i>Grraneledone pacifica</i> and drafted the text; Sirenko provided the photograph of <i>Graneledone boreopacifica</i>, collected the necessary data and revised and approved the text.