To re-evaluate the relationships of the major bivalve lineages, we amassed detailed morpho-
anatomical, ultrastructural and molecular sequence data for a targeted selection of exemplar …

Bivalve classification has suffered in the past from the crossed‐purpose discussions among
paleontologists and neontologists, and many have based their proposals on single …

Sperm competition theory predicts that males should produce many, similar sperm.
However, in some species of animals and plants, males exhibit a heteromorphism that …

Nine families of bivalve molluscs have undergone successful radiations in freshwater
habitats, including three heterodont taxa: the Sphaeriidae, Corbiculidae, and Dreissenidae …

Recent molecular analyses have demonstrated that the traditional Lucinoidea, comprising
the extant families Lucinidae, Thyasiridae, Ungulinidae, Fimbriidae, and Cyrenoididae, is …

The reproductive biology of bivalves and echinoderms, mostly of economic importance, is
described in this book. Sections on the cytoskeleton of gametes and reproduction in the …

Publisher Summary This chapter emphasizes on the results of recent studies of scallop
structure and function. Scallop is used to designate members of the superfamily Pectinoidea …

A comparative ultrastructural study of spermatogenesis was performed in the bivalve
molluscs Pitar rudis and Chamelea gallina (Veneridae) from Turkey. Sertoli cells appeared …

Using transmission and scanning electron microscopy, the mature spermatozoa of four
bivalves of the family Veneridae–Gafrarium tumidum and Circe scripta (Circinae), Pitar …

In contrast to “primitive” uniflagellate spermatozoa of marine and freshwater bivalves,
spermatozoa of the freshwater clam, Corbicula leana (Prime) have two flagella. One …