Thyone imperfecta ( Cherbonnier, 1970 )

Thandar, Ahmed S., 2008, Additions to the holothuroid fauna of the southern African temperate faunistic provinces, with descriptions of new species, Zootaxa 1697 (1), pp. 1-57 : 7

publication ID

https://doi.org/ 10.11646/zootaxa.1697.1.1

DOI

https://doi.org/10.5281/zenodo.5107095

persistent identifier

https://treatment.plazi.org/id/DE2087C7-F526-8741-A0AD-F07990AB5E22

treatment provided by

Felipe

scientific name

Thyone imperfecta ( Cherbonnier, 1970 )
status

 

Thyone imperfecta ( Cherbonnier, 1970)

Figure 3 View FIGURE 3

Havelockia imperfecta Cherbonnier, 1970: 284 , fig. 3 A–T.

Thyone imperfecta Thandar, 1990: 215 , fig. 6.

Type MNHNP, EcHh 1486 .

Type locality False Bay , 34 o 18.8' S, 18 o 32.8' E, 60 m. GoogleMaps

Material examined

SAM-A27980, UCT Ecol. Survey, False Bay , St. FAL 451 , 34 o 17.4' S, 18 o 39.2' E, 22.v. 1961, 67 m, 1 spec. plus fragment GoogleMaps .

Distribution False Bay, WCP, 60– 67 m.

Remarks

This species is well described by Cherbonnier (1970) except that the introvert spicules were not examined. Thandar (1990) transferred the species from Havelockia to Thyone on the basis of its calcareous ring. Since then, several specimens, also from the UCT Ecological Surveys at False Bay, were referred to this species by Ahearn, but these records were not published. These records were verified by the writer and the body wall, tentacle and introvert spicules are here illustrated from specimen A27761 View Materials ( FAL 592W) from that material. The body wall table discs ( Figure 3A View FIGURE 3 ) are large (56-82 µm, mean 76 µm), of various shapes and perforated by 10-12 holes; the podial tables ( Figure 3B View FIGURE 3 ) are stout with a curved disc (63-100 µm, mean 77 µm) and a twopillared spire ending in 1-2 points; end-plates are absent. The tentacle spicules ( Figure 3D View FIGURE 3 ) comprise scarce rosettes and numerous plates and rods, whereas the introvert is supported by rosette-like plates and true rosettes ( Figure 3C View FIGURE 3 ). The single 60 mm specimen in the current material corresponds well with the type and the False Bay material here illustrated, except that no tentacle rosettes were detected. This species is well characterized by its large multilocular table discs in combination with 1-2-toothed spires of the podial tables, rosettes in the introvert and the absence of end-plates in the podia.

MNHNP

Museo Nacional de Historia Natural del Paraguay

Kingdom

Animalia

Phylum

Echinodermata

Class

Holothuroidea

Order

Dendrochirotida

Family

Phyllophoridae

Genus

Thyone

Loc

Thyone imperfecta ( Cherbonnier, 1970 )

Thandar, Ahmed S. 2008
2008
Loc

Thyone imperfecta

Thandar, A. S. 1990: 215
1990
Loc

Havelockia imperfecta

Cherbonnier, G. 1970: 284
1970