Copulation in Bulinus is similar to that of Radix , shown above, except that Bulinus is sinistral while Radix is dextral.
Here the albino snail red colored because of its red, hemoglobin-containing, blood will first act as male and the black pigmented snail will act as female. Note the large bubble of air in the lung of the albino snail. After completion, the mating partners with change positions, and copulate once more, with the pigmented snail acting as male and the albino as female.
Animals with bilateral symmetry have dorsal and ventral sides, as well as anterior and posterior ends. Synapomorphy of the Bilateria.
The molluscan family Planorbidae
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Glossary bilateral symmetry having body symmetry such that the animal can be divided in one plane into two mirror-image halves. Read more Connect with us Help us improve the site by taking our survey. Facebook Twitter Pinterest.
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The molluscan family Planorbidae - Frank Collins Baker, Harley Jones Van Cleave - Google книги
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