Protists I: "Animal-Like" Protists

Descriptions

Example(s)

Common name of phylum:  Amoeba

Scientific name for Phylum:  Rhizopoda or Sarcodina

Morphology:  Unicellular, no definite shape

Mode of Locomotion:  Pseudopodia

Mode(s) of Reproduction:  Asexual

Habitats:  Freshwater, marine, parasitic

Amoeba proteus from pond water, x 100

Entamoeba histolytica in fecal smear, x 1000

Common name of phylum:  Foraminifera

Scientific name for Phylum:  Foraminifera

Morphology:  Unicellular, with shells & cytoplasmic projections

Mode of Locomotion:  Cytoplasmic projections

Mode(s) of Reproduction:  Asexual

Habitats:  Marine

From: 
http://www.ucl.ac.uk/GeolSci/micropal/foram.html

“Foraminifera are found in all marine environments, they may be planktic or benthic in mode of life. …this nomenclature tells us that foraminifera are testate (that is possessing a shell), protozoa, (single celled organisms characterised by the absence of tissues and organs), which possess granuloreticulose pseudopodia (these are thread-like extensions of the ectoplasm often including grains or tiny particles of various materials). Bi-directional cytoplasmic flow along these pseudopodia carries granules which may consist of symbiotic dinoflagellates, digestive vacuoles, mitochondria and vacuoles containing waste products; these processes are still not fully understood.”

 

Common name of phylum:  Actinopods

Scientific name of phylum:  Actinopoda

Morphology:  Unicellular

Mode of locomotion:  cytoplasmic extensions

Mode(s) of reproduction:  Asexual, but some produce flagellated reproductive cells

Habitats:   Freshwater

 Actinopod in pond water, x 40

Common name of phylum:  Zooflagellates

Scientific name of phylum:  Zoomastigina or Mastigophora

Morphology:  Unicellular, some colonial

Mode of locomotion:  One to many flagella; some amoeboid

Mode of reproduction:  Asexual

Habitats:  Freshwater, marine, parasitic

Trypanosoma spp. in blood smear, x 1000

Giardia lamblia in fecal smear, x 1000

Trichomonas vaginalis x 1000.

Common name of phylum:  Ciliates

Scientific name of phylum:  Ciliophora

Morphology:  Unicellular

Mode of locomotion:  Cilia

Mode(s) of reproduction:  Asexual & conjugation

Habitats:  Freshwater, marine, parasitic

Paramecium spp., in pond water, x 400

Balantidium coli, from fecal smear:  Nomarksi optics, x 1000

Common name of phylum:  Apicomplexans

Scientific name of phylum:  Apicomplexa

Morphology:  Unicellular

Mode of locomotion:  Pseudopodia & some move by flexing

Mode(s) of reproduction:  Asexual and sexual phases of life cycles for each species

Habitats:  Entirely parasitic

Plasmodium vivax ring stage in blood smear, x1000.

Toxoplasma gondii pseudocyst in mouse brain, x1000.