Molpadiodemas crinitus, 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 : 157-158

publication ID

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

persistent identifier

https://treatment.plazi.org/id/116087F5-FFA2-FFEB-FC91-7F10FEE5187D

treatment provided by

Felipe

scientific name

Molpadiodemas crinitus
status

sp. nov.

Molpadiodemas crinitus View in CoL sp. nov.

Figures 1h View Figure 1 , 3f, g View Figure 3 , 4e–h View Figure 4 , 7h View Figure 7

Pseudostichopus sp. MoV 2033.— O’Loughlin et al., 1994:

253–254.

Meseres villosus .— O’Loughlin, 2002: 313, figs 3a, b, tables 1, 2

(non Pseudostichopus villosus Théel, 1886 ).

Material examined. Holotype. Eastern Antarctica, Ross Sea, 72°57'S, 171°35'E, 573–576 m, USARP, Eltanin stn 1878, USNM 1023615 About USNM . GoogleMaps

Paratypes. Type locality and date, USNM E48644 About USNM (8) ; NMV F101872 About NMV (3).

Other material. Eastern Antarctica, Prydz Bay , 66°46'– 68°50'S, 72°14'– 77°19'E, 333–765 m GoogleMaps , NMV F68152 About NMV (9); F68158 (1); F68162 (5); F72534 (2); F76583 (2); F76597 (1); F76606 (1); F81816– F81817 (3); Ross Sea , 67°24'– 78°23'S, 166°15'E – 163°02'W, 223–923 m GoogleMaps , USNM E48578 About USNM E48580 About USNM (8); E48597 (4); E48621, E48623 (4); E48642 (6); E48646 (9); NMV F101874 About NMV (3); USNM E48662 About USNM , E48663 About USNM (32); NMV F101873 About NMV (4); E49244– E49245 (12); E49270 (1); E49283 (1); E49286 (2); E49299– E49300 (3); E49368 (1); 1005125 (1); 1005129 (2); New Zealand, Antipodes Is , Campbell Plateau, 2010–2100 m , E48655 (2); W of Antipodes Is , 103 m , E49357 (4).

Description. Up to 150 mm long; body rounded in transverse section, lacking brim and distinctive ventrolateral margin, sometimes transverse grooves, frequently tubercles and pygal sublobes posteriorly; body wall firm, thick to thin; lacking significant globigerine or sponge spicule attachments; body covered with thick, cylindrical tube feet, typically extended, longest and often matted pygally and in a conspicuous lateral to ventrolateral band, feet typically 2.0 mm long, 0.4 mm diameter, up to 3.0 mm long, smaller and more spaced dorsally and ventrally; multiple-branching gonad tubules; ossicles in tentacles only, abundant to sparse to absent, thick irregular non-spinous rods, frequently short thick rods with bluntly rounded ends, some with swelling mid-rod, some as irregular tuberous lumps, some with short branching, some with blunt spines, some ends branched, some branches intertwined to create perforations, lace-like mesh development on rods rare, rods up to 270 Μm long.

Colour. Body and tube feet similar in colour, dark to pale brown, contracted tube feet rare and sometimes with dark discs.

Etymology. From the Latin crinitus (long-haired, fringed), referring to the lateral band of long, fringing tube feet.

Distribution. Eastern Antarctica, Prydz Bay, 333–765 m ( O'Loughlin, 2002, as Meseres villosus ); Ross Sea, 223–923 m; Antipodes Is, 103–2100 m (this paper).

Remarks. O’Loughlin (2002) considered Antarctic material to be Pseudostichopus villosus , and although it is similar in form it is not conspecific with any of the syntypes assigned to P. villosus by Théel (1886). Amongst Molpadiodemas species the distinguishing characters of M. crinitus are: wide ventrolateral band of thick, cylindrical, extended, sometimes matted tube feet, similar in colour to the body wall, typically 2.0 mm, long, 0.4 mm diameter; tentacle ossicles usually abundant, frequently short thick rods rounded distally; absence of gonad ossicles.

USNM

Smithsonian Institution, National Museum of Natural History

NMV

Museum Victoria

Kingdom

Animalia

Phylum

Echinodermata

Class

Holothuroidea

Order

Persiculida

Family

Molpadiodemidae

Genus

Molpadiodemas

Loc

Molpadiodemas crinitus

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

Meseres villosus

O'Loughlin, P. M. 2002: 313
2002
Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF