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The jaw is opposite to the radula and reinforces part of the foregut. [2] The more purely carnivorous the diet, the more the jaw is reduced. [2] There are often pieces of food in the gut corresponding to the shape of the jaw. [2] The jaw structure can be ribbed or smooth:
The central tooth is saddle-shaped, with long basal limbs, each bearing a cusp-like spur upon its face. Their eyes are based at the base of their filiform tentacles. The foot is short and thick. Fertilization is internal. The female snail lays her eggs enclosed in a jelly-like matrix that she sometimes broods with her foot.
The Socorro springsnail, scientific name Pyrgulopsis neomexicana, is an endangered species of minute freshwater snail with a gill and an operculum, an aquatic gastropod mollusk or micromollusk in the family Hydrobiidae, the mud snails. This tiny snail previously inhabited a small group of thermal springs in the State of New Mexico, USA. Its ...
The anatomy of a common air-breathing land snail: much of this anatomy does not apply to gastropods in other clades or groups. Snails are distinguished by an anatomical process known as torsion, where the visceral mass of the animal rotates 180° to one side during development, such that the anus is situated more or less above the head. This ...
Each female bears eggs (up to 30 and at all stages of development) with a size of 3 to 7 mm in diameter and up to the full development of the embryo. At the time of their expulsion, the young are about 7 mm and their shell is already marked with the characteristic stripes of the river snails. After producing all its young, the female dies.
Image credits: historycoolkids The History Cool Kids Instagram account has amassed an impressive 1.5 million followers since its creation in 2016. But the page’s success will come as no surprise ...
Aliger gigas is gonochoristic, which means each individual snail is either distinctly male or distinctly female. [32] Females are usually larger than males in natural populations, with both sexes existing in similar proportion. [52] After internal fertilization, [39] the females lay eggs in gelatinous strings, which can be as long as 75 feet ...
Polymita picta, also known as the Cuban painted snail, or the oriente tree snail, is a species of large, air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Helminthoglyptidae. [2] It is the type species of the genus Polymita, and is endemic to Eastern Cuba.