Fig. 3

Some stages of development of the scallop Azumapecten farreri. Light microscopy images. a trochophore, b early veliger, c middle veliger, d late veliger, e pediveliger stage. Abbreviations: ad—anterior adductor, at—apical tuf, ep—episphere, eso—esophagus, hp—hyposphere, int—intestine, m—mouth, pmo—presumptive mouth opening, pt—prototroch, sg—shell gland, sh—shell, st—stomach, v—velum. The orientation a—anterior, d—dorsal, p—posterior, v—ventral. Scale bars = 20 μm