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(Other) Invertebrates

An invertebrate is an animal without a backbone. The group includes 95% of all animal species– all animals except those in the chordate subphylum Vertebrata (fish, amphibians, reptiles, birds, and mammals). Source: Wikipedia


Cnidaria - Jellyfish
Cnidaria
(pronounced /naɪˈdɛəriə/ with a silent c) is a phylum containing over 9,000 species of animals found exclusively in aquatic and mostly marine environments. Their distinguishing feature is cnidocytes, specialized cells that they use mainly for capturing prey. Their bodies consist of mesoglea, a non-living jelly-like substance, sandwiched between two layers of epithelium that are mostly one cell thick. They have two basic body forms: swimming medusae and sessile polyps, both of which are radially symmetrical with mouths surrounded by tentacles that bear cnidocytes. Source: Wikipedia

Cnidaria in Zambia:

Platyhelminths -  Flatworms
Platyhelminths (flatworms), known in scientific literature as Platyhelminthes or Plathelminthes (from the Greek πλατύ, platy, meaning "flat" and ἕλμινς (root: ἑλμινθ-), helminth-, meaning worm) are a phylum of relatively simple bilaterian, unsegmented, soft-bodied invertebrate animals. Unlike other bilaterians, they have no body cavity, and no specialized circulatory and respiratory organs, which restricts them to flattened shapes that allow oxygen and nutrients to pass through their bodies by diffusion.
Source: Wikipedia


Flatworms in Zambia: tapeworms, leeches, Schistosoma

Annelida (ringed worms)
The Annelids (also called "ringed worms"), formally called Annelida (from French annelÚs "ringed ones", ultimately from Latin anellus "little ring"[2]), are a large phylum of segmented worms, with over 17,000 modern species including ragworms, earthworms and leeches. They are found in marine environments from tidal zones to hydrothermal vents, in freshwater, and in moist terrestrial environments.
Source: Wikipedia

Ringed worms in Zambia:

Mollusca
The Mollusca, common name molluscs or mollusks, is a large phylum of invertebrate animals.
There are around 85,000 recognized extant species of molluscs. This is the largest marine phylum, comprising about 23% of all the named marine organisms. Numerous molluscs also live in freshwater and terrestrial habitats. Molluscs are highly diverse, not only in size and in anatomical structure, but also in behaviour and in habitat. Source: Wikipedia

Mollusca in Zambia:






Achatina fulica
Achatina fulica

Achatina immaculata
Achatina immaculata

Snail
Snail

planarian
planarian

 Updated: 14 April 2014
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