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A 5000‐YEAR FOSSIL RECORD OF LARVAL SHELL MORPHOLOGY OF SUBMARINE CAVE MICROSHELLS
Author(s) -
Ubukata Takao,
Kitamura Akihisa,
Hiramoto Mayumi,
Kase Tomoki
Publication year - 2009
Publication title -
evolution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.84
H-Index - 199
eISSN - 1558-5646
pISSN - 0014-3820
DOI - 10.1111/j.1558-5646.2008.00546.x
Subject(s) - cave , biology , larva , fossil record , morphology (biology) , shell (structure) , submarine , ecology , paleontology , zoology , oceanography , geology , materials science , composite material
A 5000‐year fossil series of minute submarine cave bivalves was studied using morphometric and evolutionary analyses. The obtained results indicate that the shapes of larval shells of studied species were labile, whereas the size of the larval shell was stable in each species studied. This result is different than that previously reported in most other studies in which size change is more common than shape change. This unique evolutionary pattern of these bivalves might be attributed to their refugial lifestyle.