Gastropoda - Wikipedia
The class Gastropoda is a diverse and highly successful class of mollusks within the phylum Mollusca. It contains a vast total of named species, second only to the insects in overall number. The fossil history of this class goes back to the Late Cambrian.
Gastropod | Definition, Examples, & Facts | Britannica
2024年10月14日 · Gastropod, any member of more than 65,000 animal species belonging to the class Gastropoda, the largest group in the phylum Mollusca. The class is made up of the snails, which have a shell into which the animal can withdraw, and the slugs, which are snails whose shells have been reduced to an internal fragment or lost.
ADW: Gastropoda: INFORMATION
Gastropoda. The Class Gastropoda includes the snails and slugs. Most gastropods have a single, usually spirally coiled shell into which the body can be withdrawn, but the shell is lost or reduced some important groups.
Class Gastropoda - Digital Atlas of Ancient Life
2021年9月16日 · Gastropods are the second largest class of animals (after the Insecta)—with 40,000–90,000 living species and at least 13,000 extant and fossil genera (Ponder and Lindberg, 2020)—and are also one of the most evolutionarily successful groups in the variety of ecosystems and habitats that they occupy.
Gastropod Fast Facts - ThoughtCo
2019年7月12日 · Scientific Name: Gastropoda. Common Name (s): Snails, slugs, limpets, and sea hares. Basic Animal Group: Invertebrate. Size: From .04–8 inches. Lifespan: 20–50 years. Diet: Carnivore or Herbivore. Population: Unknown. Habitat: Oceans, waterways and terrestrial environments of all sorts worldwide.
The Animal Encyclopedia: Gastropods - ThoughtCo
2018年1月19日 · Gastropods (Gastropoda) are a highly diverse group of mollusks that include between 60,000 and 80,000 living species. Gastropods account for nearly 80 percent of all living mollusks.
Phylogeny and Classification of Extant Gastropoda
Caenogastropoda is the most diverse clade of gastropods, including about 157 extant families, 190 extinct families (Bouchet et al., 2017), and 60% of living snail species (>23,000; WoRMS). They are incredibly varied in morphology, ecology, and behavior. Most are marine, but others live in freshwater and on land.
Gastropod - Shell Structure, Anatomy, Diversity | Britannica
2024年10月14日 · Frequently, the shell is altered into a nonspiral cap or a cup-shaped limpet form as an adaptation to life in swift currents (the freshwater family Ancylidae) or amid pounding waves on rocks (the marine families Acmaeidae, Patellidae, Fissurellidae, and Calyptraeidae).
Gastropods - Snails, Sea Slugs, Sea Hares, Nudibranchs - ThoughtCo
2017年5月21日 · Gastropods are animals in the Class Gastropoda - the group of organisms that includes snails, slugs, limpets and sea hares. There are over 40,000 species in this class. Envision a sea shell, and you're thinking about a gastropod, although this class contains many shell-less animals as well.
Gastropod - New World Encyclopedia
A gastropod is any member of Gastropoda, the largest and most diverse class of the phylum Mollusca, with about 75,000 known living species. Gastropods are also referred to as univalves since most have a single shell, or valve, which is characteristically coiled or spiraled, as in snails, limpets, abalones, cowries, whelks, and conches.