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Mating Cornu aspersum garden snails The terrestrial slug Arion vulgaris, a mating pair with intertwined, everted penises, carrying out external sperm exchange The nudibranch sea slug Nembrotha rutilans, a mating pair. The mating of gastropods is a vast and varied topic, because the taxonomic class Gastropoda is very large and diverse, a group ...
VD = vas deferens Head of a mating Helix pomatia showing the everted penis (P), and the dart sac (S) in the process of shooting a love dart (D). Head of Helix pomatia after mating with everted vagina (V) and penis (P). Pulmonate land gastropods are simultaneous hermaphrodites and their reproductive system is complex. It is all completely ...
18 April 2011 - Research on the mating of Chelidonura sandrana contradicts the traditional theory about mating in simultaneous hermaphrodites. 29 March 2011 - New family Horaiclavidae and families within Conoidea redefined; 8 February 2011 - A BBC crew filmed how the spider Olios coenobitus lifts a land gastropod shell into its web to use as a ...
Gastropods have the greatest numbers of named mollusk species. However, estimates of the total number of gastropod species vary widely, depending on cited sources. The number of gastropod species can be ascertained from estimates of the number of described species of Mollusca with accepted names: about 85,000 (minimum 50,000, maximum 120,000). [9]
Helix is a genus of large, air-breathing land snails native to the western Palaearctic and characterized by a globular shell. [1] [2]It is the type genus of the family Helicidae, and one of the animal genera described by Carl Linnaeus [3] at the dawn of the zoological nomenclature.
The taxonomy of the Gastropoda as it was revised in 2005 by Philippe Bouchet and Jean-Pierre Rocroi is a system for the scientific classification of gastropod mollusks (Gastropods are a taxonomic class of animals which consists of snails and slugs of every kind, from the land, from freshwater, and from saltwater).
When animal sexual behaviour is reproductively motivated, it is often termed mating or copulation; for most non-human mammals, mating and copulation occur at oestrus (the most fertile period in the mammalian female's reproductive cycle), which increases the chances of successful impregnation.
Before mating and copulation, the male spider spins a small web and ejaculates on to it. He then stores the sperm in reservoirs on his large pedipalps, from which he transfers sperm to the female's genitals. The females can store sperm indefinitely. [7] Butterflies mating