Hemiocnus insolens ( Théel, 1886 )

Thandar, Ahmed S., 2018, On some miscellaneous sea cucumbers (Echinodermata: Holothuroidea) in the collections of the South African Museum with three new species, Zootaxa 4532 (1), pp. 57-85 : 58-59

publication ID	https://doi.org/10.11646/zootaxa.4532.1.3
publication LSID	lsid:zoobank.org:pub:A6128B92-0B20-4D4D-AE8B-483D39BB2C04
DOI	https://doi.org/10.5281/zenodo.3512106
persistent identifier	https://treatment.plazi.org/id/2A0887A5-991E-5E20-BCF8-F947FCD2F899
treatment provided by	Plazi (2019-03-28 15:41:47, last updated 2024-11-26 05:56:32)
scientific name	Hemiocnus insolens ( Théel, 1886 )
status

Treatment

Hemiocnus insolens ( Théel, 1886) View in CoL

( Figure 1 View FIGURE 1 )

Cucumaria insolens Théel, 1886: 70 View in CoL , pl. 4, fig. 5; Cherbonnier, 1952: 480, pl. 39, figs. 1–23.

Pseudocnella insolens Thandar, 1987:289 View in CoL , figs. 1a, 2, 5a–c; 1991: 129, fig. 1D; 1992 (synonymy before 1992); 2008:22; Thandar & Rambaran 2015:58 View Cited Treatment , fig. 10.

Hemiocnus insolens Mjobo & Thandar 2016:157 View in CoL .

Diagnosis (see Théel 1886, Cherbonnier 1952).

Material examined. A23068 View Materials -0821054,AFR-SAMC-A 090907, South Coast Demersal Trawl , 89 m, 12 IV 2004, 34° 04’, 23° 51’, 60 spec; SAM-A 090908 , AFR-A24725-0933455, South Coast Demersal Trawl , 100 m, 34° 41.7’, 22° 9.17’, 28 IV 2005, 12 spec; SAMC-A 090909 , AFR-7147-063-036, Port Elizabeth , Algoa Bay, 38 m, 18 V 1988, 2 spec; SAMC-A 090910 , Kalk Bay, VII 1912, K. H. Barnard, 1 spec .

Distribution (after Thandar 2008) Luderitz ( Namibia) to Port Elizabeth, 0– 110 m.

Remarks. This well-known southern African south and west coast species was transferred from the genus Pseudocnella Thandar, 1987 to Hemiocnus by Mjobo & Thandar (2016), erected to accommodate the type species Pseudocnella syracusanus ( Grube 1840) from the Mediterranean and a new Mediterranean species, H. rubrobrunneus from Tunisia. Some pertinent features of H. insolens were discussed by Thandar (2008), who commented on several morphs separated by Natasen Moodley (2000) on the basis of anal ossicles. These morphs have yet to be confirmed by gene sequencing as the species appears to be highly polymorphorphic with several colour morphs which defy separation by morphology alone.

References

Cherbonnier, G. (1952) Contribution a la connaisance des holothuries de 1 ' Afrique du sud. Transactions of the Royal Society of South Africa, 33: 469 - 509, 16 pls. https: // doi. org / 10.1080 / 00359195109519895

Grube, A. E. (1840) Aktinien Echinodermen und Wurmer des Adriatischen und Mittelmeers. Konigsberg, pp. 92, 1 pl. https: // doi. org / 10.5962 / bhl. title. 10133

Mjobo, S. & Thandar, A. S. (2016) A new genus and a new species in the sea cucumber subfamily Colochirinae (Echinodermata: Holothuroidea: Dendrochirotida: Cucumariidae) in the Mediterranean Sea. Zootaxa, 4189 (1), 156 - 164. https: // doi. org / 10.11646 / zootaxa. 4189.1.8

Natasen Moodley, M. (2000) A taxonomic study of Some holothuroid echinoderms taken from southern African waters, west of Port Elizabeth, in the collections of the South African Museum . MSc dissertation, unpublished, University of Durban- Westville, South Africa, 164 pp.

Thandar, A. S. (1987) The status of some southern African nominal species of Cucumaria (s. e.) referable to a new genus and their ecological isolation. South African Journal of Zoology, 22, 287 - 296. https: // doi. org / 10.1080 / 02541858.1987.11448059

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

Thandar, A. S. & Rambaran, R. (2015) On some sea cucumbers (Echinodermata: Holothuroidea) from off the south and west coasts of South Africa collected by the South African Environmental and Observation Network (SAEON). Zootaxa. 3999 (1), 41 - 61. https: // doi. org / 10.11646 / zootaxa. 3999.1.3

Theel, H. (1886) Holothuroidea. Part II. Report on the Scientific Results of the HMS ' Challenger' during the years 1873 - 1876. Zoology, 4 (39), 1 - 290, 16 pls.

Figures

FIGURE 1. Hemiocnus insolens (Théel, 1886). AFR-SAMC-A090907. A. Specimen (entire); B. Rods from tentacles; C. Anal surface ossicles; D. Introvert ossicles; E. Plates from body wall; F. Buttons from body wall; G. Baskets from body wall; H. Rods from body wall.