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heliozoan. proteomyxid. rhizopod. sarcodine, any protozoan of the superclass (sometimes class or subphylum) Sarcodina. These organisms have streaming cytoplasm and use temporary cytoplasmic extensions called pseudopodia in locomotion (called amoeboid movement) and feeding. Sarcodines include the genus Amoeba ( see amoeba) and pathogenic species ...
- The Editors of Encyclopaedia Britannica
- Overview
- Classification
- Lobosa
- Acarpomyxea
- Eumycetozoea
- Plasmodiophorea
- Morphology, Life Cycle, and Habitat
- Morphology and Habitat
- Phylum Sarcodina: Characteristics of The Superclass Actinopoda
- Radiolarians
Classified as a subphylum or superclass in some literature, phylum Sarcodina consists of amoeboid protozoa that move and feed by means of cytoplasmic streaming. The majority of species can be found in aquatic environments where they exist as free-living organisms. However, a few species are parasitic and cause harm. Phylum Sarcodina is divided into...
Kingdom: Protista Subkingdom: Protozoa Phylum:Sarcodina Superclass:Rhizopoda - Classes Lobosa, Acarpomyxea, Eumycetozoea, Granuloreticulosea, Filosea, and Plasmodiophorea Superclass:Actinopoda - Classes Radiolaria, Heliozoea, and Phaeodarea. *Phylum Sarcodina is estimated to consist of over 12,000 species.
Morphology - The class Lobosa consists of testate and naked amoeba. Arcella and Difflugia species are examples of shelled amoeba in this group. Arcella species are characterized by an umbrella-shaped shell of varying sizes depending on the species. These shells are organic in nature and may contain pores. As the amoeba grows, the shells accumulate ...
Morphology- Members of the class Acarpomyxea are generally small in size. Some have been shown to exist as unicellular plasmodia while the majority is branched amoebae. The pseudopods move and feed by means of the cytoplasmic extensions (pseudopodia) which also consists of microfilaments. Habitat - The majority of species can be found in moist soil...
Morphology- Eumycetozoea species are unique from some of the other Sarcodina in that they form filiform subpseudopodia. Compared to other pseudopodia, filiform subpseudopodia are shaped like filament and are thus described as thread-like. Some of the species have also been shown to produce flagella for locomotion (swimming). In some of the species,...
Plasmodiophorea consists of genera like Spongospora, Woronina, Ligniera, and Plasmodophora, etc. While their species are classified under the group Rhizopoda, they are known considered true protozoa. Morphology and life cycle- Members of this group are collectively known as plasmodiophorids and exhibit significant variation in morphology when compa...
The genus Nuclearia is one of the best-studied groups within the class Filosia. Although they do not necessarily produce cysts, their life cycle consists of a cyst-like stage characterized by short pseudopodia that originate from one end of the cell body. The trophic forms, on the other hand, tend to be spherical in shape and range between 22 and 5...
The majority of species in the class Granuloreticulosea are characterized by mineralized shells. These shells may have one or more apertures. Some of the species do not have a shell and produce branched rhizopodia. The cell body contains multiple nuclei, granular cytoplasm, food vacuoles, mitochondria, and Golgi bodies, etc. A few of the species pr...
The majority of species in the Superclass Actinopoda in phylum Sarcodina are free-floating organisms found in aquatic habitats. They include:
The term Radiolaria is used to refer to large marine Actinopoda that float and trap their food (plankton) using rhizopodial networks.
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Dec 13, 2023 · 3. Sarcodina. Sarcodina, a type of protozoa, is a unicellular organism without a definite shape. Its cell membrane is so flexible that it changes its shape constantly. It moves about by extending fingerlike projections called pseudopodia at the side of the cell towards the direction in which it is going. Pseudopodia means false feet.
May 11, 2018 · Sarcodina (phylum Protozoa, subphylum Sarcomastigophora) A superclass of protozoa which form pseudopodia for feeding and locomotion. There are three classes, and many orders. The majority of species live in marine aquatic environments but some occur in fresh water (and are important members of the soil fauna) and some are parasitic in the ...
May 28, 2022 · In Phylum Protozoa, Subphylum Sarcomastigophora Superclass Sarcodina. Class Rhizopodea; Class Piroplasmea; Class Actinopodea; Jahn & Bovee (1965), Bovee & Jahn (1965, 1966) [edit] Jahn, T.L. & Bovee, E.C. 1965. Mechanisms of movement in taxonomy of Sarcodina. I. As a basis for a new major dichotomy into two classes, Autotractea and Hydraulea ...
Amoebas are the most well-known Sarcodina organisms. These evolved a two-part life cycle, which particularly helps the pathogenic E. histolytica during infection. In the first stage, the amoeba is a cyst, or an inactive form capable of withstanding very harsh conditions – such as the acidic environment of the human digestive tract.
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