Pseudostichopus occultatus Marenzeller, 1893

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 : 173-174

publication ID

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

persistent identifier

https://treatment.plazi.org/id/116087F5-FFB2-FFFB-FC91-7CB9FE6E1DBC

treatment provided by

Felipe

scientific name

Pseudostichopus occultatus Marenzeller, 1893
status

 

Pseudostichopus occultatus Marenzeller, 1893 View in CoL

Pseudostichopus occultatus Marenzeller, 1893 a: 15–17 View in CoL , pl. 4 fig. 9.— Marenzeller, 1893b: 10, pl. 2 fig. 3a–c.— Perrier, 1902: 337–338.— Mortensen, 1918: 81.— Mortensen, 1927: 387–388.— Deichmann, 1930: 89–90.

Molpadiodemas occultatus .— Heding, 1940: 353–359.

Meseres occultatus View in CoL .— O’Loughlin, 1998: 497.— O’Loughlin, 2002: 307, tables 1, 3.

Material examined. Syntypes. Mediterranean Sea, Crete, 35°4'N, 24°17'E, 1445 m, 31 Aug 1891, MNHN GoogleMaps EcHh 3658 (2); USNM 18294 About USNM (2).

Description. Up to 40 mm long; encrusted with shell, sand, sponge spicule attachments; body dorsoventrally depressed, flat ventrally, low convex dorsally, acute ventrolateral margin or thin brim; body wall parchment-like, wrinkled with low reticulate ridges; appendages most evident as papillae dorsolaterally and in ventrolateral band, typically 1 mm long; ossicles in tentacles, pygal lobes, tube feet, respiratory trees; tentacle ossicles thick to thin irregular rods, some with central swellings, rare short branches, rare blunt spines, lacking mesh developments, up to 280 µm long; pygal lobe ossicles irregular perforated plates, partly double-layered, up to 400 µm long; tube foot ossicles smooth tapered rods with central swelling, typically 80 µm long, “endplates” clusters of very irregular twisted branched rods or irregular perforated plates, typically 80 µm wide; respiratory tree ossicles abundant thin, smooth, symmetrically branched, pointed rods, typically 80 Μm long.

Colour. Body surface appearance brown, body wall texture grey.

Distribution. Mediterranean Sea, 415–1445 m ( Marenzeller, 1893 a); North Atlantic, Spain, off Cape Finisterre, 363–510 m ( Marenzeller, 1893b).

Remarks. P. occultatus has the diagnostic characters of Pseudostichopus , and is returned to its original combination. O’Loughlin (2002) described thin, tubular appendages covering the whole body. These are considered here to be epibiotes. Amongst Pseudostichopus species, the distinguishing characters of P. occultatus are: short, thin, smooth, distally pointed, symmetrically branched, respiratory tree ossicles; “endplate” ossicles; irregular, partly double-layered, perforated plate ossicles in the pygal lobes.

MNHN

Museum National d'Histoire Naturelle

Kingdom

Animalia

Phylum

Echinodermata

Class

Holothuroidea

Order

Persiculida

Family

Pseudostichopodidae

Genus

Pseudostichopus

Loc

Pseudostichopus occultatus Marenzeller, 1893

O'Loughlin, P. Mark & Ahearn, Cynthia 2005
2005
Loc

Meseres occultatus

O'Loughlin, P. M. 2002: 307
O'Loughlin, P. M. 1998: 497
1998
Loc

Molpadiodemas occultatus

Heding, S. G. 1940: 353
1940
Loc

Pseudostichopus occultatus

Deichmann, E. 1930: 89
Mortensen, T. 1927: 387
Mortensen, T. 1918: 81
Perrier, R. 1902: 337
Marenzeller 1893: 10
1893
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