Australian Biological Resources Study

Australian Faunal Directory


Regional Maps

Species Isognomon legumen (Gmelin, 1791)

Irregular Toothed Oyster

Compiler and date details

December 2010 - Peter U. Middelfart, Winston F. Ponder & Des Beechey, Australian Museum, Sydney, NSW, Australia


Generic Combinations

  • Isognomon (Isognomon) legumen (Gmelin, 1791).
  • Isognomon (Isognomon) vulsella (Lamarck, 1819).



In addition to the synonyms given above, Huber (2010, CD-ROM lines 4677-4688) gives the following synonyms, apparently not based on Australian types:

Perna torva Gould, 1850 - Hawaii
Perna lentiginosa Reeve, 1858 - Philippines
Perna maillardi Deshayes in Maillard, 1863 - Reunion
Perna spengleri "Chemnitz" Lynge, 1909 - South China Sea




Northern Territory, Queensland, Western Australia

Extra Distribution Information

Tropical Indo-West Pacific

IBRA and IMCRA regions (map not available)


Cocos (Keeling) Island Province (22), Northern Shelf Province (25), Northwest Shelf Transition (26), Northwest Shelf Province (27), Central Eastern Shelf Province (38), Central Eastern Shelf Transition (39), Northeast Shelf Province (40), Northeast Shelf Transition (41)

Distribution References

Ecological Descriptors

Continental shelf, coral reef, intertidal, marine, rock bottom–marine, sublittoral.


General References

Harper, E. & Morton, B. 1994. The biology of Isognomon legumen at Cape D'Aguilar, Hong Kong, with special reference to predation by muricids. pp. 405-426 in Morton, B. The malacofauna of Hong Kong and southern China III. Hong Kong : Hong Kong University Press pp. 1-504.

Hedley, C. 1918. A checklist of the marine fauna of New South Wales. Part 1. Journal and Proceedings of the Royal Society of New South Wales 51: M1–M120 [M7]

Huber, M. 2010. Compendium of Bivalves. A full-color guide to 3,300 of the world's marine bivalves. A status on Bivalvia after 250 years of research. Hackenheim, Germany : ConchBooks 901 pp., 1 CD-ROM.

Kay, E.A. 1979. Hawaiian marine shells. Reef and shore fauna of Hawaii. Section 4 : Mollusca. Honolulu, Hawaii : Bishop Museum Press Bernice P. Bishop Museum Special Publication Vol. 64(4) 653 pp. [520, fig. 167G, H]

Kilburn, R.N. 2002. Mollusca Database for South Africa.

Kilburn, R.N. & Rippey, E. 1982. Seashells of Southern Africa. Johannesburg : MacMillan South Africa Publishers 249 pp. [162, pl. 37, fig. 5, textfig. 123]

Koch, H.J. 1953. A new species of the Lamellibranch genus Isognomon from South Africa. Proceedings of the Malacological Society of London 30: 22 [22]

Lamprell, K. & Healy, J. 1998. Bivalves of Australia. Leiden : Backhuys Publishers Vol. 2 288 pp. [108, fig. 260]

Lynge, H. 1909. Marine Lamellibranchiata. The Danish Expedition to Siam 1899-1900. Kongelige Danske Videnskabernes. Selskabs Skrifter. Kjøbenhavn 7(5): 1-299 [146]

Maes, V.O. 1967. The littoral marine mollusks of Cocos-Keeling Islands (Indian Ocean). Proceedings of the Academy of Natural Sciences, Philadelphia 119: 93–217 [155]

Odhner, N.H. 1917. Results of Dr E. Mjöbergs Swedish scientific expeditions to Australia. 1910–1913, pt XVII, Mollusca. Kongliga Svenska Vetenskaps-Academiens Nya Handlingar, Stockholm 52(16): 1–115 pls 1–3 [Date published 19 Sept. 1917] [17, pl. 1, figs 9, 10] (for Isognomon (Isognomon) vulsella (Lamarck, 1819))

Oliver, P.G. 1992. Bivalved Seashells of the Red Sea. Wiesbaden : Verlage Christa Hemmen 330 pp. [68, pl. 10] (in subgenus Anisoperna)

Steyn, D.G. & Lussi, M. 1998. Marine Shells of South Africa. Hartebeespoort, South Africa : Ekogilde Publishers 264 pp. [204, fig. 832]

Zhenrui, W. 1980. Studies on Chinese species of Isognomonidae (Mollusca). Studia Marina Sinica 16: 131-141 [141]


History of changes

Note that this list may be incomplete for dates prior to September 2013.
Published As part of group Action Date Action Type Compiler(s)
22-Aug-2023 BIVALVIA 22-Aug-2023 MOVED Mr Des Beechey Ingo Burghardt Ms Anouk Mututantri (AM)
13-Sep-2022 BIVALVIA 13-Sep-2022 MOVED Mr Des Beechey Ingo Burghardt Ms Anouk Mututantri (AM)
11-Aug-2014 11-Aug-2014 MOVED
11-Aug-2014 PTERIOIDEA 13-Sep-2013 MODIFIED Dr Winston Ponder (AM) Mr Des Beechey (AM) Dr Peter Middelfart (AM)
11-Aug-2014 17-Nov-2010 ADDED
17-Nov-2010 MODIFIED