Specimen of Galeomma photographed in Guam, from here.

Belongs within: Lasaeidae.

The Galeommatidae are a family of small bivalves in which the shell may be completely enclosed by the expanded mantle. The shell itself is often reduced with the valves transverse, irregular and/or gaping. A number of galeommatids live as commensals in the burrows of invertebrates such as echinoderms or crustaceans.

    |--Pseudogaleomma japonica (Adams 1868) TW07
    |--Passya SB93
    |--Chlamydoconcha [Chlamydoconchidae, Chlamydoconchoidea] M96
    |    `--C. orcutti Dall 1884 M12
    |--Scintilla Deshayes 1855 P61
    |    |--*S. philippinensis P61
    |    |--S. clarkeana Aldrich 1897 SB93
    |    `--S. stevensoni Powell 1932 P61
    |--Galeomma GW02
    |    |--G. denticulata Deshayes 1863 H09
    |    |--G. takii GR98
    |    `--G. turtoni GW02
    |--Divariscintilla Powell 1932 P61
    |    |--*D. maoria Powell 1932 P61
    |    |--D. troglodytes GW02
    |    `--D. yoyo GW02
    |--Scintillona Finlay 1927 P61
    |    |--*S. zelandicus (Odhner 1924) [=Spaniorinus zelandicus] P61
    |    |--S. benthicola Dell 1956 P61
    |    |--S. cryptozoica (Hedley 1917) M12
    |    `--S. daviei Morton 2008 M12
    `--Solecardia F27
         |--S. alberti (Smith 1884) [=Scintilla alberti] H09
         |--S. aurantiaca (Deshayes 1856) [=Scintilla aurantiaca] H09
         |--S. cuvieri (Deshayes 1856) [=Scintilla cuvieri] H09
         |--S. hyalina (Deshayes 1856) [=Scintilla hyalina] H09
         |--S. purpurascens (Sowerby 1874) [=Scintilla purpurascens] H09
         |--S. strangei (Deshayes 1856) [=Scintilla strangei] H09
         `--S. turgescens (Deshayes 1856) [=Scintilla turgescens] H09

*Type species of generic name indicated


[F27] Finlay, H. J. 1927. A further commentary on New Zealand molluscan systematics. Transactions and Proceedings of the New Zealand Institute 57: 320–485.

[GR98] Giribet, G., & C. Ribera. 1998. The position of arthropods in the animal kingdom: a search for a reliable outgroup for internal arthropod phylogeny. Molecular Phylogenetics and Evolution 9: 481–488.

[GW02] Giribet, G., & W. Wheeler. 2002. On bivalve phylogeny: a high-level analysis of the Bivalvia (Mollusca) based on combined morphology and DNA sequence data. Invertebrate Biology 121 (4): 271–324.

[H09] Hedley, C. 1909. The Marine Fauna of Queensland: Address by the President of Section D. Australasian Association for the Advancement of Science: Brisbane.

[M96] Morton, B. 1996. The evolutionary history of the Bivalvia. In: Taylor, J. D. (ed.) Origin and Evolutionary Radiation of the Mollusca pp. 337–359. Oxford University Press: Oxford.

[M12] Morton, B. 2012. The biology and functional morphology of Nucula pusilla (Bivalvia: Protobranchia: Nuculidae) from Western Australia, Australia: primitive or miniature simplicity? Records of the Western Australian Museum 27 (2): 85–100.

[P61] Powell, A. W. B. 1961. Shells of New Zealand: An illustrated handbook 4th ed. Whitcombe and Tombs Limited: Christchurch.

[SB93] Skelton, P. W., & M. J. Benton. 1993. Mollusca: Rostroconchia, Scaphopoda and Bivalvia. In: Benton, M. J. (ed.) The Fossil Record 2 pp. 237–263. Chapman & Hall: London.

[TW07] Taylor, J. D., S. T. Williams, E. A. Glover & P. Dyal. 2007. A molecular phylogeny of heterodont bivalves (Mollusca: Bivalvia: Heterodonta): new analyses of 18S and 28S rRNA genes. Zoologica Scripta 36 (6): 587–606.

Last updated: 26 October 2021.

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