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In some families of pulmonate land snails, one unusual feature of the reproductive system and reproductive behavior is the creation and utilization of love darts, the throwing of which has been identified as a form of sexual selection. [1] Gastropods reproductive systems vary significantly from one taxonomic group to another.
The mating of gastropods is a vast and varied topic, because the taxonomic class Gastropoda is very large and diverse, a group comprising sea snails and sea slugs, freshwater snails and land snails and slugs. Gastropods are second only to the class Insecta in terms of total number of species.
Paropeas achatinaceum is a small snail with an oblong shell. The reproductive system of Paropeas achatinaceum was described by Naggs (1994) [5] and by Azuma (1995). [6]
Again, in some land snails, an unusual feature of the reproductive system of gastropods is the presence and utilization of love darts. In many marine gastropods other than the opisthobranchs, there are separate sexes (dioecious/gonochoric); most land gastropods, however, are hermaphrodites.
Cathaica fasciola is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Camaenidae, which is similar to Cathaica pyrrhozona on shell morphology. [ 2 ] Taxonomy
Haeckel (left), 1866 Sea snail shells, Kunstformen der Natur, 1904. Ernst Heinrich Philipp August Haeckel (February 16, 1834 – August 9, 1919), also written von Haeckel, was an eminent German biologist, naturalist, philosopher, physician, professor and artist who discovered, described and named thousands of new species, mapped a genealogical tree relating all life forms, and coined many ...
[5] [10] Female snails are larger than males. In the male, the penis has a long glandular strip on the terminal lobe, a long penial gland, and three shorter dorsal glandular strips. [5] [10] A detailed description of the reproductive system of this snail species was provided by Hershler in 1994. [9]
The reproductive system has some unusual features. The gonads of adult snails are not inside the shell; they are in the head-foot region on the right side of the body. [5] There are no gonads present in juveniles with shell length of 2.2 mm. [24] Adults possess both testis and ovary in different levels of development. [5]