Prototrochus linseae, O’Loughlin & VandenSpiegel, 2010

O’Loughlin, P. Mark & VandenSpiegel, Didier, 2010, A revision of Antarctic and some Indo-Pacific apodid sea cucumbers (Echinodermata: Holothuroidea: Apodida), Memoirs of Museum Victoria 67, pp. 61-95 : 73

publication ID

https://doi.org/ 10.24199/j.mmv.2010.67.06

publication LSID

lsid:zoobank.org:pub:5A8C650E-A34A-4072-A797-0A75D218DD7C

DOI

https://doi.org/10.5281/zenodo.12212324

persistent identifier

https://treatment.plazi.org/id/365B627F-FF81-FFDB-FF7B-5E7DFB565BB2

treatment provided by

Felipe

scientific name

Prototrochus linseae
status

sp. nov.

Prototrochus linseae View in CoL sp. nov.

Figures 1a View Figure 1 , 7 View Figure 7 ; table 2

Material examined. Holotype. Antarctica, Scotia Sea , South Shetland Is, 62.53°S 61.83°W, 192 m, BAS stn LI–EBS–4, 4 Mar 2006, NMV F168631 About NMV . GoogleMaps

Paratypes. Type locality and date, NHM 2010.50 (1) ; RBINS IG 31 About RBINS 459 (2, SEM).

Other material. South Shetland Is, 61.61°S 55.22°W, 1544 m, BAS GoogleMaps stn EI–EBS–1, 12 Mar 2006, NHM 2010.53 (1).

Diagnosis. Myriotrochid species up to 7 mm long; 10 tentacles; lacking tentacle rods; scattered myriotrochid wheels only in body wall; wheel ossicle diameters 125–137 µ m, spokes 10–11, teeth 22–24, spokes/teeth % 45, hub diameters 30–34 µ m, hub diameter/wheel diameter % 24.0–24.7, teeth length/wheel diameter % 12.9–13.0.

Colour (preserved). Body pale yellow-brown to off-white, translucent; tentacles yellow.

Distribution. Antarctica, Scotia Sea, South Shetland Is, 192– 1544 m.

Etymology. Named for Katrin Linse (British Antarctic Survey), in appreciation of her role in the BAS BIOPEARL expeditions and the collection of specimens studied here, and with gratitude for her gracious collaboration in making BAS specimens available for this study and providing relevant data.

Remarks. Most of the 12 species referred to their new genus Prototrochus by Belyaev and Mironov (1982) lack tentacle ossicles, as does Prototrochus linseae sp. nov. Most of the species lacking tentacle ossicles are from the deep trenches (6450–10700 m in Belyaev and Mironov 1882). Only Prototrochus bipartitodentatus ( Belyaev and Mironov, 1978) has been recorded from the Antarctic (South Sandwich Trench, 7700–8100 m). It has external teeth around the rim of the wheels that Prototrochus linseae does not. Belyaev and Mironov (1982) list three shallower species (540–3000 m), two from the Mediterranean Sea and Prototrochus australis (Belyaev and Mironov, 1981) from the Tasman Sea. O’Loughlin and VandenSpiegel (2007) list three additional species from the Tasman Sea: Prototrochus burni O’Loughlin, 2007 *, Prototrochus staplesi O’Loughlin, 2007 * and Prototrochus taniae O’Loughlin, 2007 * (*all in O’Loughlin and VandenSpiegel 2007). As demonstrated by reference to Table 1 and Figure 10 in O’Loughlin and VandenSpiegel (2007), Prototrochus linseae is distinguished from the four Tasman Sea Prototrochus species by the form of the wheels: smallest wheels; largest teeth; widest uniformly broad spokes, with sharp constriction at the hub; largest hub.

BAS

Bulgarian Academy of Science

NMV

Museum Victoria

RBINS

Royal Belgian Institute of Natural Sciences

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