### animal | mollusc:

Gastropod
* All gastropods are asymmetrical
  - display some degree of ganglial concentration
* Many gastropods have a shell
  - one shell in which the animal can withdraw
* Most gastropods are herbivores and feed by scraping algae off of rocks using the radula
  - herbivores, carnivores or scavengers
  - hermaphrodites
  - marine, although some are pulmonates
  - very mobile and active
  - found on land have both the male and female reproductive organs in the same animal
  - grow shells
  - has-part organs
* Most gastropods have a single spiral shell, but many are shell-less
  - single, spiraled shell whereas slugs lack or have a reduced shell
  - spiral shell into which the animal can retract
  - an asymmetrical, spiral shell with a single aperture
  - coil shells
  - large aperture through which the organism comes out
  - lungs
  - senses
  - shells, generally in the shape of a spiral with numerous turns
  - possess organs
  - show a courtship behavior before copulation
* Some gastropods are hermaphroditic, that is, they have both male and female parts
  - unisexual
  - conserve water
* Some gastropods feed on clams
  - mollusks
  - other mollusks
  - suctorially and have lost the radula
  - get their oxygen by means of gills
  - have bases
* Some gastropods have female organs
  - holes
  - separate sexes, others are hermaphroditic
  - lack shells completely
  - live in sea
  - possess lids
  - show diversity
  - use penises
* also have a head equipped with antennae, eyes, and mouth, and a large foot.
* are a class of mollusk that includes snails, conchs and whelks
  - among the more economically im- portant animals
  - animals that live on land or water
  - by far the largest group of molluscs
  - dioecious, and some forms are hermaphroditic
  - economically valuable as food for many animals, including humans
* are found in a variety of habitats across Australia but favour moist environments
  - both fresh and salt water, and on land
  - worldwide
  - known to play an important role in plant, especially periphyton, production
  - marine, fresh water, and terrestrial
  - one of the most diverse groups of animals, both in form, habit, and habitat
  - primarily marine, but freshwater and terrestrial forms occur
* are relatively tough to distinguish due to their mode of preservation
  - uncommon, and no cephalopods or trilobites are represented
  - second only to the insects in terms of varieties
  - single coiled shells
* are snails and slugs
  - which have a single shell
* are the largest division of the mollusks, based on numbers of species
  - family of mollusks and live almost everywhere
* are the most common members of a group of animals called mollusks
  - diverse of the mollusk groups
  - univalves which means they have one shell
  - very successful in marine, freshwater and terrestrial habitats
* come in a wide variety of colors, shapes and sizes.
* exhibit it - their shells are coiled around a center point at the apex
  - the least change from the ancestral molluscan plan of all the molluscs
  - virtually every type of feeding possible
* feed on very small things.
* form the second largest class in the animal kingdom, the largest being the insects.
* have a complex nervous system with ganglia
  - feeding organ called a radula
  - muscular foot used for creeping in most species
  - shell, although some have lost their shells through evolution
  - single shell, unlike bivalves
  - small teeth which are called radula
* include herbivores.
  - cell membranes
  - faces
  - plasma membranes
  - sections
* lay eggs.
* live in every conceivable habitat on Earth
  - just about everywhere on Earth - salt water, fresh water, and on land
* make up the family of animals that include snails, slugs, limpets and sea hares.
* move using a muscular foot.
* possess a distinct head, foot, and mantle cavity
* range in size from less than inch to over a foot.
* rasp their food.
* represent one such taxon.
* serve as excellent sources of proxy environmental data.
* show tremendous variation in the de- gree of development of the shell.
* use a broad, muscular foot to move and have a distinct head region.
* usually have a one piece shell.