Leptaxinus minutus Verrill & Bush 1898
Description
Leptaxinus minutus Verrill & Bush, 1898
(Fig. 30)
Material examined. All from Gulf of Cadiz; two live-collected specimens, MSM01-03, stn 242 GKG13, Mercator mud volcano, 35º17.870'N, 06º38.810'W, 350 m, 6 May 2006 (DBUA 00835.01); one live-collected specimen, TTR16, stn AT608Gr, Darwin mud volcano, 35º 23.531N, 07º 11.475W, 1115 m, 30 May 2006 (DBUA 00836.01); two live-collected specimens, TTR16, stn AT604Gr, Yuma mud volcano, 35º 25.820N, 07º 06.330W, 1030 m, 29 May 2006 (DBUA 00836.02).
PLATE 4. Figures 24–25: Thyasira (Parathyasira) granulosa (Monterosato, 1874), Fig. 24 stn 321 GKG22, Meknès mud volcano, 732 m (DBUA 00828.03), Fig. 25 stn 242 GKG13, Mercator mud volcano, 350 m (DBUA 00828.02); Fig. 26 Thyasira obsoleta (Verrill & Bush, 1898) stn 190 MUC8, Captain Arutyunov mud volcano, 1322 m, (DBUA 00831.02); Fig. 27 Thyasira tortuosa (Jeffreys, 1881) AT 622Gr, Porto mud volcano, 3902 m (DBUA 00830.01); Fig. 28 Axinulus croulinensis (Jeffreys, 1847) stn 242 GKG13, Mercator mud volcano, 350 m (DBUA 00832.02); Fig. 29 Mendicula ferruginosa (Forbes, 1844) stn AT575B, Mercator mud volcano, 355 m (DBUA 000834.01); Fig. 30 Leptaxinus minutus Verrill & Bush, 1898, stn AT608Gr, Darwin mud volcano, 1115 m (DBUA 00836.01).
Remarks. Leptaxinus minutus is rather tumid with a distinctly angular posterior outline but lacking a posterior sinus. The hinge is well developed with weak lateral folds and a tubercular cardinal. It was described from the northwest Atlantic and has been recorded from Norway and Iceland (Ockelmann in Oliver & Killeen 2002). The Gulf of Cadiz specimens agree well with the shell figured by Oliver and Killeen (2002, Pl.25 C, D) but comes from a much greater depth. Dufour (2005) did not examine this species but the Gulf of Cadiz specimens have a Type 2 gill with a single demibranch and according to similar forms described by this author, it will doubtfully be symbiotic.
Other
Published as part of Rodrigues, Clara F., Oliver, Graham & Cunha, Marina R., 2008, Thyasiroidea (Mollusca: Bivalvia) from the mud volcanoes of the Gulf of Cadiz (NE Atlantic), pp. 41-56 in Zootaxa 1752 on pages 50-52, DOI: 10.5281/zenodo.274249Files
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Linked records
Additional details
Identifiers
Related works
- Is part of
- Journal article: 10.5281/zenodo.274249 (DOI)
- Journal article: http://publication.plazi.org/id/0A7A644CF71BE577FFB0FFF362018C6D (URL)
- Is source of
- https://sibils.text-analytics.ch/search/collections/plazi/F6431C34F712E57CFF27F96C63EA8DCF (URL)
Biodiversity
- Family
- Thyasiridae
- Genus
- Leptaxinus
- Kingdom
- Animalia
- Order
- Lucinoida
- Phylum
- Mollusca
- Scientific name authorship
- Verrill & Bush
- Species
- minutus
- Taxon rank
- species
- Taxonomic concept label
- Leptaxinus minutus Verrill, 1898 sec. Rodrigues, Oliver & Cunha, 2008
References
- Verrill, A. E. & Bush K. J. (1898) Revision of the deep-water Mollusca of the Atlantic coast of North America, with descriptions of new genera and species. Proceedings of the United States National Museum, 20, 775 - 901.
- Monterosato, T. A. (1874) Recherches conchyliologiques, effectuees au Cap Santo Vito, en Sicile. (Traduz. dall'italiano di H. Crosse). Journal de Conchyliologie, 22 (3), 243 - 282.
- Jeffreys, J. G. (1881) On the Mollusca procured during the H. M. S. " Lightning " and " Porcupine " expedition (Part 3). Proceedings of the Zoological Society of London (1881), 693 - 724.
- Jeffreys, J. G. (1847) Additional notices on British shells. Annals and Magazine of Natural History, 20, 16 - 19.
- Forbes, E. (1844) Report on the Mollusca and Radiata of the Aegean sea, and on their distribution, considered as bearing on geology. Reports of the British Association for the Advancement of Science (1843), 130 - 193.
- Oliver, P. G. & Killeen, I. J. (2002) The Thyasiridae (Mollusca: Bivalvia) of the British Continental Shelf and North Sea Oilfields. An Identification Manual. Studies in Marine Biodiversity and Systematics from the National Museum of Wales, BIOMOR Reports, 3, 1 - 73.
- Dufour, S. (2005) Gill anatomy and the evolution of symbiosis in the bivalve family Thyasiridae. Biological Bulletin, 208, 200 - 212.