Abstract
A unique pedunculate barnacle, Arcoscalpellum spinum, new species, was discovered on the East Pacific Rise (18?S) during the 1993 Naudur cruise of the French submersible Nautile. We propose Vertebroscalpellum, new subgenus, to include this and a related species, A. brevecarinatum (Hoek), from the south Atlantic. Although basically 8 plates comprise each whorl of the peduncular armament in scalpellomorphs, the number in derived forms is subject to variation. The number of vertical tiers of peduncular plates generally relates to the number of capitular plates and/or the sutures between them. One trend is toward the multiplication of plates, the other a reduction. The latter is manifest in Vertebroscalpellum by the separation of 5-plated whorls into an imbricating 2/3 plated pattern that is unique among scalpellomorphs. Numerous barnacles were collected during the pioneering voyage of H.M.S. Challenger. Among them there were several specimens of a scalpellomorph dredged from 2,514-2,926 m at 46?S, 45?E, west of Crozet Island in the south Atlantic, and described by Hoek (1883) as Scalpellum brevecarinatum, a species subsequently assigned to the genus Arcoscalpellum Hoek, 1907. The Russian research vessel Ob purportedly dredged this species from 4,540 m at 59?S, 97?E, off the eastern coast
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
