Specimen of Galeomma photographed in Guam, from here.

Belongs within: Heterodonta.

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

Characters (from Cox et al. 1969): Shell slightly convex or flattened, commonly transverse, irregular or gaping. Resilium ill-defined, accompanied by marginal ligament. Hinge irregular, with small to quite minute, tuberculiform cardinals, hooking or projecting at termination of flexuous somewhat obscure laterals, and crossing themselves from one valve to another around resilium, in more or less cyclodont disposition.

    |--Marikellia Iredlae 1936 MG-H11, P61
    |    |--*M. solida [=Kellia solida] P61
    |    `--M. rotunda (Deshayes 1855) P61
    |--Scintilla Deshayes 1855 P61
    |    |--*S. philippinensis P61
    |    `--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 F27
    |    |--*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


Cox, L. R., N. D. Newell et al. 1969. Treatise on Invertebrate Paleontology pt N. Bivalvia vol. 2. The Geological Society of America, Inc. and The University of Kansas.

[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.

[MG-H11] McEnnulty, F. R., K. L. Gowlett-Holmes, A. Williams, F. Althaus, J. Fromont, G. C. B. Poore, T. D. O’Hara, L. Marsh, P. Kott, S. Slack-Smith, P. Alderslade & M. V. Kitahara. 2011. The deepwater megabenthic invertebrates on the western continental margin of Australia (100–1100 m depths): composition, distribution and novelty. Records of the Western Australian Museum Supplement 80: 1–191.

[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.

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