Not stated by the author. [details]
Original diagnosis by Baird (1864: 8): "Corpus pyramidatum, maculatum, dorso et ventre canaliculatum. Segmenta ... [details]
Atlantic Ocean: English Channel. [details]
Not explicitly stated by the author. The specfic epithet signata is a Latin participle meaning 'marked', ... [details]
Muddy bottom. [details]
Epitokous specimen. Deposited in the Natural History Museum, London, UK (NHMUK 1863.4.7.13). [details]
Polperro, Cornwall, England, English Channel, Atlantic Ocean (gazetteer estimate 50.329°, -4.514°). [details]