In the life history of Nereis
a free-swimming ciliated
The small, free-swimming, ciliated aquatic
Sexual reproduction produces a free-swimming, ciliated larva called a planula. ....
The prototroch and prototroch nerve in trochophores of two Phyllodoce species are described at the ultrastructural level and interpreted with reference to the ...
May 7, 2016
When these larvae hatch, each is a microscopic swimmer known as a
They share a distant common ancestor with the annelid worms, an evolutionary
heritage suggested by their larval form, called a