Search results
Results from the WOW.Com Content Network
Cornu aspersum in warm regions commonly emerges in moist weather in winter. Sinistral form (exceptional) and dextral form (common) The adult bears a hard, thin calcareous shell 25–40 millimetres (1– 1 + 5 ⁄ 8 in) in diameter and 25–35 millimetres (1– 1 + 3 ⁄ 8 in) high, with four or five whorls.
Download as PDF; Printable version; ... an unusual feature of the reproductive system of gastropods is the presence and utilization of love darts. ... (Cornu aspersum
Cornu aspersum (O. F. Müller, 1774) Cornu cephalaeditana (Giannuzzi-Savelli, Sparacio & Oliva, 1986) Cornu cretense Hausdorf, Bamberger & Walther, 2020 Cornu insolida (Monterosato, 1892) Cornu mazzullii (De Cristofori & Jan, 1832) Synonyms [1] Cornu (Cornu) Born, 1778 Cornu (Erctella) Monterosato, 1894 Cryptomphalus Charpentier, 1837 Erctella ...
In advanced groups of insects, the male uses its aedeagus, a structure formed from the terminal segments of the abdomen, to deposit sperm directly (though sometimes in a capsule called a "spermatophore") into the female's reproductive tract. Other animals reproduce sexually with external fertilization, including many basal vertebrates.
Respiratory system of gastropods. ctenidium (mollusc) cerata. cnidosac; pneumostome; siphon (mollusc) circulatory system of gastropods; excretory system of gastropods. pseudofeces; reproductive system of gastropods. apophallation; Love dart; number of other genital structures: reproductive system of gastropods#Genital structures
A drawing of an abnormal scalarid form of the shell of the garden snail, Cornu aspersum. The terminology used to describe the shells of gastropods includes: Aperture: the opening of the shell; Lip: peristome: the margin of the aperture; Apex: the smallest few whorls of the shell
The ovotestis of the freshwater snail Biomphalaria glabrata.The area around the ovotestis is the hepatopancreas. (10× magnification) An ovotestis or hermaphroditic gland (Latin: glandula hermaphroditica), [7] is found as normal anatomical feature in the reproductive system of some gastropods including such species as the land snail Cornu aspersum.
When an individual of a species with external sperm transfer lacks a penis, it can still reproduce uniparenterally, such as by self-fertilisation, provided it possesses the other components of a normal reproductive system. [25] Uniparental reproduction has been observed in the marsh slug (Deroceras laeve).