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- Title
OBSERVATIONS ON THE EUGLENOID <em>COLACIUM</em> WITH SPECIAL REFERENCE TO THE FORMATION AND MORPHLOGY OF ATTACHMENT MATERIAL.
- Authors
Rosowski, James R.; kugrens, Paul
- Abstract
Certain taxonomic features of Colacium Ehrb. are evaluated from field, clone, and literature studies. A main character, morphology of the attachment material, is shown lo be partially nutritionally controlled: stalks and cushion holdfasts are produced in soil-water but tritely in plain Euglena medium; ferric and managanous compounds influence the formation of stalks in C. vesiculosum; single clones of C. vesiculosum produce holdfast characteristics of C. arbus. cula, C. steinii, C. sideropus, and C. simplex when grown in soil-water medium. Stalk formation is rare in C. vesiculosum but common in C. mucronatum and Colacium sp. (from the rectum of damselflies). Some questionable negative observations, incompleteness of certain, species descriptions, and overlapping of species characteristics lead us lo believe that C. sequabile, C. stentorinum, C. calvum, C. multoculata, C. clongatum, C. ovale, C. arcuatum, C. cyclopicola, and C. pyrenophorum = C. vesiculosum. Our C. vesiculosum attached to Mougeotia and Volvox tertius, suggesting that tire epiphytic species of Colacium, C. epiphyticum, and C. parasiticum need to be studied in clonal culture to deferrable if they bare substrate specificity, and if they represent valid species, Recommendations are made for identifying and naming species.
- Subjects
EUGLENOIDS; MORPHOLOGY; ATTACHMENT mechanisms (Biology); CLASSIFICATION
- Publication
Journal of Phycology, 1973, Vol 9, Issue 4, p370
- ISSN
0022-3646
- Publication type
Article
- DOI
10.1111/j.1529-8817.1973.tb04110.x