Pseudostichopus tuberosus, O'Loughlin & Ahearn, 2005

O'Loughlin, P. Mark & Ahearn, Cynthia, 2005, A review of pygal-furrowed Synallactidae (Echinodermata: Holothuroidea), with new species from the Antarctic, Atlantic and Pacific oceans, Memoirs of Museum Victoria 62 (2), pp. 147-179 : 176-177

publication ID

https://doi.org/ 10.24199/j.mmv.2005.62.5

persistent identifier

https://treatment.plazi.org/id/116087F5-FFB5-FFFE-FCA9-7D8FFF0A1CCF

treatment provided by

Felipe

scientific name

Pseudostichopus tuberosus
status

sp. nov.

Pseudostichopus tuberosus View in CoL sp. nov.

Figures 9b, f View Figure 9 , 10i View Figure 10 , 11g, h View Figure 11 , 12i–l View Figure 12

Material examined. Holotype. North Pacific Ocean, off Oregon, 45°43'N, 125°13'W, 1920 m, Commando , 28 May 1964, USNM E16721 About USNM . GoogleMaps

Paratypes. Holotype locality and date, USNM 1008333 About USNM (1); NMV F101864 About NMV (1) .

Other material. North Pacific Ocean , off southern California, 32°33'N, 118°04'W, 1937 m, USNM E17015 About USNM GoogleMaps (1).

Description. Up to 140 mm long; body wall leathery, thin, firm; body flat ventrally, convex dorsally; prominent single series of ventrolateral protuberances (“warts”), irregularly rounded, typically 2.0 mm wide, domed, soft and thin-walled, or firm and flat, not surmounted by papillae, ventral to series of ventrolateral papillae; body transversely creased and wrinkled ventrally, sometimes dorsally, abundant grit attachments, ventrolateral margin with indentations and lobes created by transverse creases; irregular double rows of tapering papillae on both paired radii, up to 2.0 mm long; minute tube feet all over body, up to 0.2 mm long; ossicles in tentacles and gonad; tentacle ossicles abundant, predominantly small thick to thin curved rods, bluntly to finely spinous or smooth, swelling mid-rod sometimes, rare short branches, rods up to 340 µm long; gonad ossicles abundant, small unbranched rods, tapering to pointed ends, slightly spinous to smooth, typically with central swelling, up to 140 µm long.

Colour. Body, tube feet and protuberances off-white.

Etymology. From the Latin tuberosus (“full of lumps or protuberances”), referring to the distinct large protuberances along each ventrolateral margin.

Distribution. North-eastern Pacific Ocean, off Oregon and southern California, 1920–1937 m.

Remarks. The ventrolateral protuberances are wart-like ("fungiform papillae"), and resemble similar features in Bathyplotes moseleyi . Amongst Pseudostichopus species the distinguishing characters of P. tuberosus are: ventrolateral series of wart-like protuberances; presence of small unbranched tapered rods in the gonad.

USNM

Smithsonian Institution, National Museum of Natural History

NMV

Museum Victoria

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