Algal List
Monday 11/8/99 and Wednesday 11/10/99

NOTE SPECIES ON THIS PAGE MAY DIFFER FROM THOSE IN LAB.  USE LAB SPECIMENS ONLY FOR DRAWINGS

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.
Source:  Ohio University Algal Home Page; Dr. Morgan Vis
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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