Biodiversity Literature Repository
Published August 9, 2023 | Version v1
Taxonomic treatment Open

Stenosemus simplicissimus

Creators

Description

Stenosemus simplicissimus (Thiele, 1906)

(Figures 23C, D, 27–32)

Ischnochiton (Chondropleura) simplicissimus Thiele, 1906: 335, pl. 29, figs. 21–25; 1908: 21; 1909: 112; E.A. Smith, 1910: 211; Barnard, 1963: 6.

Ischnochiton simplicissimus; Day, 1963: 6.

Ischnochiton (Stenosemus) simplicissimus; Kaas & Van Belle 1990: 67, fig. 27, map 1.

Stenosemus simplicissimus; Sirenko 1994: 164; Schwabe 2008: 71 (bibliography and description).

Type material. Holotype (ZMB Moll 59908).

Type locality. South Africa, Cape of Good Hope, 318 m.

Material examined. Holotype, Southern Ocean, Heard Island, 52.3889°S, 72. 6272°E, Locality HIMI-Western Platean, 302 m, cruise SC 26, Haul N 161 B, 2 spms, BL 20.0 mm, (TMAG, E 26179), 01.05.2003. 52.5969°S, 71. 9952°E, Locality HIMI-Aurora Bank, 310 m, cruise SC 26, Mol 37, benthic sled, 6 spms, BL 10.0– 14.5 mm, (TMAG, E 26178), 30.04.2003.

Distribution. Stenosemus simplicissimus is wide distributed species in the South Ocean. It was found near South America (Shag Rocks near South Georgia Island), near Antarctica (eastern Weddell Sea), near South Africa (Cape off Good Hope) and Heard Island. The latest find has greatly expanded the range of this species. The species inhabits depth from 284 to 1064 m (Schwabe 2008).

Remarks. Holotype (RMNH.MOLL.K.5155) has a somewhat glossy tegmentum, dorsal corpuscles with short longitudinal riblets in the upper part and with granules on the top. The studied specimens (BL 7.0 mm and 20.0 mm) from Heard Island have 9–10 longitudinal riblets on all dorsal surface of the corpuscles and have no granules on the top of the corpuscles. The larger specimen has 23 gills per side arranged from valve III to valve VII. The radula of the smaller specimen is 3.4 mm long and has 28 transverse rows of mature teeth.

Notes

Published as part of Sirenko, Boris, 2023, A small collection of rare and new chitons (Mollusca: Polyplacophora) from the Tasmanian Museum and Art Gallery, pp. 359-392 in Zootaxa 5325 (3) on page 381, DOI: 10.11646/zootaxa.5325.3.3, http://zenodo.org/record/8247001

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Linked records

Additional details

Identifiers

URL
http://treatment.plazi.org/id/03CD7E00684D696A44FE660AFBDDE8D3

Cites
Figure: 10.5281/zenodo.8247078 (DOI)
Figure: 10.5281/zenodo.8247094 (DOI)
Figure: 10.5281/zenodo.8247096 (DOI)
Figure: 10.5281/zenodo.8247098 (DOI)
Figure: 10.5281/zenodo.8247100 (DOI)
Figure: 10.5281/zenodo.8247102 (DOI)
Figure: 10.5281/zenodo.8247104 (DOI)
Is part of
Journal article: 10.11646/zootaxa.5325.3.3 (DOI)
Journal article: http://zenodo.org/record/8247001 (URL)
Journal article: http://publication.plazi.org/id/FFF40678685B697C44696269FFC2EF4A (URL)
Journal article: http://zoobank.org/A1FD8DA8-A72C-41B9-8FD7-E0DCE2A1D3BD (URL)
Is source of
https://biodiversitypmc.sibils.org/collections/plazi/03CD7E00684D696A44FE660AFBDDE8D3 (URL)
https://www.gbif.org/species/212429387 (URL)
https://www.checklistbank.org/dataset/54294/taxon/03CD7E00684D696A44FE660AFBDDE8D3.taxon (URL)

Biodiversity

Collection code
BL, TMAG , ZMB
Event date
2003-01-05
Family
Ischnochitonidae
Genus
Stenosemus
Kingdom
Animalia
Material sample ID
E 26179, E 26178
Order
Chitonida
Phylum
Mollusca
Scientific name authorship
Thiele
Species
simplicissimus
Taxon rank
species
Type status
holotype
Verbatim event date
2003-01-05/04-30
Taxonomic concept label
Stenosemus simplicissimus (Thiele, 1906) sec. Sirenko, 2023

References

  • Thiele, J. (1906) Uber die Chitonen der deutschen Tiefsee-Expedition. Wissenschaftliche Ergebnisse der Deutschen Tiefsee-Expedition, 9 (2), 327 - 334, pl. 29.
  • Smith, E. A. (1910) On South African marine Mollusca, with descriptions of new species. Annals of the Natal Museum, 2, 175 - 220, pls. 7 - 8.
  • Barnard, K. H. (1963) Contributions to the knowledge of South African marine Mollusca. IV, Gastropoda: Prosobranchiata: Rhipidoglossa, Docoglossa, Tectibranchiata, Polyplacophora, Solenogastres, Scapho-poda. Annals of the South African Museum, 47, 201 - 360, figs. 1 - 30.
  • Day, J. H. (1963) A key to South African chitons. The Conchological Society of South Africa. Special publications, 3, 1 - 8.
  • Kaas, P. & Van Belle, R. A. (1990) Monograph of living chitons (Mollusca: Polyplacophora). Vol. 4 Suborder Ischnochitonina: Ischnochitonidae: Ischnochitoninae (continued). Additions to Vols. 1 - 3. E. J. Brill, Leiden, 298 pp. https: // doi. org / 10.1163 / 9789004431706
  • Sirenko, B. I. (1994) Chitons (Polyplacophora) of the continental slope of the Kurile Islands with a brief review of deep water species of the Russian seas. In: Sirenko, B. I. & Vassilenko, S. V. (Eds.), The fauna of the continental slope of the Kurile Islands, Exploration of the fauna of the seas, 46 (54), pp. 158 - 174.
  • Schwabe, E. (2008) A summary of reports of abyssal and hadal Monoplacophora and Polyplacophora (Mollusca). In: Martinez Arbizu, P. & Brix, S. (Eds.), Bringing light into deep-sea biodiversity. Zootaxa, 1866 (1), pp. 205 - 222. https: // doi. org / 10.11646 / zootaxa. 1866.1.10