Algal
List
Monday
11/1/99 and Wednesday 11/3/99
Phylum (Division) Chlorophyta;
Greens
Sub-phyllum Chlorophyceae -
Order Volvocales
Family
Chlamydomonadaceae
Chlamydomonas sp. - a
single celled, biflagellate algae; note thin glycoprotein wall surrounding
the cell, other algae have cellulose walls; has one large cup-shaped chloroplast;
the two flagella are in a V shape and are located in the notch seen in
this picture; has a pyrenoid (protein region inside chloroplasts that accumulates
carbohydrates) and an eyespot. Typically
reproduction is via cell division (asexual
reproduction)
Picture Source: Ohio University Algal
Home Page; Dr. Morgan Vis
Family
Volvocaceae
Pandorina sp. - Click
here for another image colonial cells, in groups of 4; up to
32 cells per colony, reproduction by cell division (asexual reproduction)
in which an entire new colony is formed or by isogamy
(sexual reproduction)
NOTE ORGANISIM IS STAINED RED.
Picture Source: Botany 331 Home Page:Dr. Sam
Rushforth / Dr.Jack Donaldson
Brigham Young University
Sub-phyllum Chlorophyceae -
Order Zygnematales (Conjugales)
Family Desmidiaceae
Cosmarium sp. - a
desmid, has a sharp constriction in the middle which creates semi-cells,
nucleus in the center, look for pyrenoids (protein region inside chloroplasts
that accumulates carbohydrates), asexual reproduction by cell division,
sexual reproduction by conjugation.
Picture Source: Ohio University Algal
Home Page; Dr. Morgan Vis
Phylum (Division) Euglenophyta;
Euglenoid
Order Euglenales
Family Euglenaceae
Euglena sp. -
a
single celled algae with one flagellum,
numerous small chloroplasts, and one to several paramylon
(carbohydrate) granules; look for red eyespot
which senses light sources and signals the flagella to move towards it.
Pellicle is not often visible.
Picture Source: Ohio University Algal
Home Page; Dr. Morgan Vis
Phylum (Division) Pyrrhophyta
- Dinoflagellates
Order Dinokontae
Family Peridiniaceae
Peridinium sp. - biflagellated
single cell, a dinokont (one flagella that
circles the middle of the cell and one that is in the anterior; have plates
underneath the cell wall known as a theca,
also have vesicles called trichocysts; these trichocysts can discharge
crystalline rods as a defense. Dinoflagellates can be associated
with water discoloration in estuaries and along the coasts. Although
some red tides give a beautiful luminescence to the waters, others release
deadly toxins which can kill fish and poison humans who eat shellfish from
these waters.
Picture Source: Ohio University Algal
Home Page; Dr. Morgan Vis
Phylum (Division) Cyanophyta;
Blue-greens
Order Nostocales
Family Nostocaceae
Nostoc sp. -
found in gelatinous lichens, fixes
nitrogen at the heterocysts, also may have
thickened cells in resting state know as akinetes,
frequently form large, mucilaginous balls (upper left picture), different
from Anabaena sp. because of thick
mucilage covering the filaments.
Picture Source: Ohio University Algal Home Page; Dr.
Morgan Vis
Family Scytonemataceae
Scytonema
sp. - also found in gelatinous
lichens, fixes nitrogen at the intercalary
heterocysts, classic example of false branching,
see how trichomes meet and "appear" to branch without cells actually being
connected.
Picture Source: Ohio University Algal Home Page; Dr.
Morgan Vis
STUDENT SAMPLES
Phylum (Division) Chrysophyta;
Golden Algae
Order Centrales
Family Coscinodiscaceae
Stephanodiscus sp.
Picture Source: Bowling Green State University - Center
for Algal Microscopy and Image Digitization
Order Pennales
Family Fragilariaceae
Asterionella sp.
Picture Source: Bowling Green State University - Center
for Algal Microscopy and Image Digitization
Fragilaria sp.
Picture Source: Bowling Green State University - Center
for Algal Microscopy and Image Digitization
Habitat
Descriptions/List Plant
Lists Plant Glossary
Announcements
Grasses/Sedges/RushesAlgal
Glossary Algal Lists
Back to
Home Page