Figure 1: Pictured Eudorina specimen with edges in focus; each spherical individual cell composing the colony contains two flagella, which are difficult to see even under high power; cells are bright green color, as seen above.
Order: Chlamydomonadales
Family: Volvocaceae
Collection Date: September 20, 2015
Habitat: Quiet waters, open waters, shallows of ditches, bogs, ponds, puddles
Location: Observation Pond - Hiram College Field Station - Hiram, OH
Description: Green; individual cells are spherical with two flagella; form colonies, which range in size from 40-50 μm in diameter
Collector: Caroline Georskey
Key Used: Rainis, K.G, Russell, B.J.1996. Guide to Microlife. A Division of Grolier Publishing. Danbury, CT.
Key Steps:
- Shape key pp. 30 --> Eudorina pp. 139
Typically two volvocine species are studied: the Chlamydomonas reinhardtii as a unicellular alga, and Volvox carter as a multicellular alga with differentiated cell types (Lerche & Hallmann). While species with intermediate characteristics exist, they tend to complicate the boundaries between unicellular and differentiated multicellular species (Lerche & Hallmann). An example of one of these species is Eudorina elegans, and it requires detailed genetic manipulation and has limited DNA and/or protein sequence information, which scientists are in the process of discovering (Lerche & Hallmann).
Links:
http://www.microscope-microscope.org/applications/pond-critters/protozoans/mastigophora/eudorina.htmhttp://cfb.unh.edu/phycokey/Choices/Chlorophyceae/colonies/colonies_flagellated/EUDORINA/Eudorina_key.html
http://lkcnhm.nus.edu.sg/dna/organisms/details/641
http://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=5597
http://www.biomedcentral.com/1472-6750/13/11
http://botany.si.edu/projects/algae/
http://www.energy.gov/eere/bioenergy/algal-biofuels
http://tolweb.org/accessory/Algae:_Protists_with_Chloroplasts?acc_id=52
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