Thursday, November 10, 2011

Specimen #9: Bracteacoccus

Name: Bracteacoccus
Family: Chlorococcaceae
Location: Hiram College Botany Lab, Algae Tanks
Collection Date: November 3rd, 2011
Collector: Katie Rumora

Key Used:
Prescott, G. W. (1970). How to Know the Freshwater Algae . Boston : WCB McGraw Hill .

1b. Plants microscopic, or if macroscopic with cellular structures and branches not clearly visible to the unaided eye; without whorls of branches clearly visible … 4
4a. (1) Cells containing chloroplasts with green predominating; or with other pigments predominating: yellow-green , golden yellow, brownish, reddish or bluish-green … 5
5a. Plants grass or leaf-green or gray- to violet-green, or tawny-green … 25
25b. Organisms non-motile in the vegetative condition. Cells solitary or colonial, or filamentous forms … 81
81b. Plant not filamentous, not as above, but solitary cells; or a colony or 2 or more cells, often enclosed by mucilage or by old mother-cell walls … 82
82a. Cells solitary or gregarious but not forming colonies of adjoined cells … 183
183b. Cells free-floating, attached, or endophytic; without a sessile lorica … 184
184b. Cells some other shape … 194
194b. Not living in the tissues of plants nor in animals (but may be in the mucilage of other algae) … 201
201b. Cells not as above … 202
202b. Cells not attached, free-floating; or on moist soil, on snow, sometimes forming a green film … 212
212b. Cells oval, circular (or nearly so), pyramidal, trapezoidal, or star-shaped, isodiametrically angular, not more than 3 times the diameter in length … 235
235b. Cells not constricted in the midregion … 247
247b. Cells variously shaped but not enclosed in such an envelope … 248
248a. Cells oval, ovoid, spherical or ellipsoid … 249
250b. Cells without spines or decorations … 262
262b. Cells not associated with fungi in lichens … 263
263b. Chloroplast not axial, or more than 1 in a cell, without radiating lobes … 267
267a. (263) Cells spherical …. 268
268b. Cells not as above … 269
269b. Cells not enclosed in mucilage … 272
272b. Chloroplasts several to many parietal, angular plates; pyrenoids lacking … Bracteacoccus 

 
Figure 1: Bracteacoccus 

 
Figure 2: Preserved Specimen of Bractaecoccus  

Description:

"Spherical cells occur singly, resembling Planktosphaeria, contain several to many parietal, lens-shaped
chloroplasts that lack pyrenoids; can form biflagellated zoospores. Occurs in soils"

Links:


References:
Prescott, G. W. (1970). How to Know the Freshwater Algae . Boston : WCB McGraw Hill .

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