Algal
List
Monday
11/8/99 and Wednesday 11/10/99
Phylum (Division) Chlorophyta;
Greens
Sub-phyllum Chlorophyceae
Order Oedogoniales
Family Coleochaetaceae
Coleochaete sp. -
filamentous algae with differentiation in growing patterns (heterotrichy),
grows on the surface of plants (an epiphyte), filaments often form a disc
click
here for picture, cells are irregularly branched, sexual reproduction
is oogamous.
Picture Source: Botany 331 Home Page:Dr. Sam Rushforth
/ Dr.Jack Donaldson
Brigham Young University
Sub-phyllum Chlorophyceae
Order Oedogoniales
Family Oedogoniaceae
Bulbochaete sp. - branched,
filamentous algae; each branch has hairs or setae; the setae are
distinctive becuase of its swollen base that narrows to a sharp tip (see
figure below); oogamous
reproduction via a nannadrous
condition (see Oedogonium)
Picture Source: Ohio University Algal Home Page; Dr.
Morgan Vis
Oedogonium sp. - unbranched,
filamentous algae; branches may be anchored by a holdfast (anchoring) cell;
distinctive for its complex reproduction; in asexual reproduction
rings (called cell caps or thickenings see picture below) develop beneath
the vegetative cell prior to the cell breaking off. In sexual oogamous
reproduction, there the development of a thickened cell that becomes
the oogonium (macrandrous condition); additionally a small side appendage
may also develop next to the oogonium that is the male filament (nannandrous
condition). Small sproes are released by the male filaments that
are attracted to the oogonium.
Picture Source: Ohio University Algal Home Page; Dr.
Morgan Vis
Sub-phyllum Chlorophyceae
Order Volvocales
Family
Volvocaceae
Eudorina sp. - colonial
cells in a mucilage, with a tiered arrangements, cells in a colony range
from 16 to 64, cells in the colony are the same size (compare to
Volvox),
sexual reproduction is anisogamous.
Note image below has been stained red. Click
here for another image
Picture Source: Botany 331 Home Page:Dr. Sam Rushforth
/ Dr.Jack Donaldson
Brigham Young University
Sub-phyllum Chlorophyceae
Order Zygnematales (Conjugales)
Family Zygnemataceae
Spirogyra sp. - a
filamentous algae that can sexually reproduce by conjugation,
tubes are formed between adjacent filaments allowing for movement of cells,
this gives Spirogyra a ladder-like appearance, chloroplasts are
in spirals, pyrenoids are along the protoplasts.
Picture Source: Ohio University Algal Home Page; Dr.
Morgan Vis
Phylum (Division) Euglenophyta;
Euglenoid
Order Euglenales
Family Euglenaceae
Phacus sp. - a
single celled algae with one flagellum,
numerous small chloroplasts, and several ring-shaped paramylon
(carbohydrate) granules; cells narrows sharply at the anterior end; compare
to Euglena.
Picture Source: Ohio University Algal Home Page; Dr.
Morgan Vis
Phylum Chrysophyta - The Golden
Browns, Yellow-Greens, Diatoms
Subphylum Xanthophyceae -
Order Tribonematales
Family Xanthophyceae
Tribonema sp. - a
yellow green algae, food stored as chrysolaminarin, filamentous and unbranching,
distinctive becuase of H-shaped cell walls, when filamment breaks (a form
of asexual reproduction), cells break in the middle, chloroplasts are parietal
(along the cell wall) discs or folded plates.
Picture Source: Ohio University Algal Home Page; Dr.
Morgan Vis
Subphylum Bacillariophyceae
(Diatomaceae)
Order Pennales
Family Fragilariaceae
Synedra sp. -
a great deal of variation, bilaterally
symmetric diatom, has a pseudoraphe
(clear line down the middle where ornamentation is absent); often long
and needle-like, frustules long
and straight, may have capitate poles (enlarged portions at the ends of
the valve view).
Picture Source: Susquehanna University Algal Image Archive;
Matt Wargo
Picture Source: Bowling Green State University - Center
for Algal Microscopy and Image Digitization
Subphylum Xanthophyceae
Order Vaucheriales
Family Vaucheriaceae- Vaucheria
sp. - coenocytic,
filamentous algae with irregular branching, sexual reproduction is oogamous.
Distinct oogonium and antheridia develop on some branches.
Vegetative (non-reproductive stage)
Picture Source: Ohio University Algal Home Page; Dr.
Morgan Vis |
ANTHERIDIA (left) next to developing OOGONIUM (right)
Picture Source: Botany 331 Home Page:
Dr. Sam Rushforth / Dr.Jack Donaldson
Brigham Young University |
Phylum (Division) Cyanophyta;
Blue-greens
Order Oscillatoriales
Family Oscillatoriaceae
Lyngbya
sp. - filamentous blue-green, no heterocysts,
filaments in firm mucilage, the
mucilagenous sheath is longer than
the filament (see picture), reproduction is asexual and happens by the
filament into pieces with each piece becoming a new filament.
Picture Source: Susquehanna University Algal Image Archive;
Matt Wargo
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