Marine invertebrates belonging to a broad range of taxa disperse aquatic spermatozoa to
fertilize eggs that are retained rather than spawned. We outline the occurrence of this …

Sperm polymorphism, a phenomenon in which more than one type of sperm is produced
within a species, occurs widely in animals from invertebrates to vertebrates. Sperm in this …

The type species of the genera Mysella, Rochefortia, Rochefortula and Altenaeum are
illustrated and discussed. A new genus Kurtiella is introduced for 'Mysella'bidentata and …

Abstract The bivalve Pseudopythina macrophthalmensis (Galeommatoidea) is a commensal
with the crab Macrophthalmus convexus (Ocypodidae) in Okinawa Prefecture, Japan. It is a …

Abstract The intertidal Bivalvia Barrimysia siphonosomae (Montacutidae) and
Pseudopythina ochetostomae (Kelliidae) live commensally with Siphonosoma cumanense …

For the first time, bacterial symbiosis is recognized in the bivalve family Montacutidae of the
superfamily Galeommatoidea. The ctenidial filaments of Syssitomya pourtalesiana Oliver …

Analysis of standard (60 frames/s) and high-speed (200 frames/s) video records revealed
that unencapsulated sperm aggregates (spermatozeugmata) of the gymnolaemate bryozoan …

Calyptogena gallardoi is a vesicomyid bivalve inhabiting a methane seep area located at a
depth of 740–870 m off the Bay of Concepción, Chile. Vesicomyids host chemoautotrophic …

Three species of galeommatoidean bivalves live commensally with Brissus latecarinatus
(Echinoidea, Spatangoidea) near Phuket Marine Biological Center, Thailand. Scintillona …

The ultrastructure of the sperm of the common bivalve species Mercenaria stimpsoni and
Mactra chinensis from Peter the Great Bay is described. The sperm structure is typical for …