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A MORPHOLOGICAL AND TAXONOMIC CONSIDERATION OF TABELLARIA (BACILLARIOPHYCEAE) FROM THE NORTHCENTRAL UNITED STATES 1, 2
Author(s) -
Koppen John D.
Publication year - 1975
Publication title -
journal of phycology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.85
H-Index - 127
eISSN - 1529-8817
pISSN - 0022-3646
DOI - 10.1111/j.1529-8817.1975.tb02774.x
Subject(s) - biology , taxon , taxonomy (biology) , diatom , frustule , morphology (biology) , zoology , botany , ecology
SUMMARY The taxonomy, distribution, and ecology of the diatom genus Tabellaria Ehr. from a portion of the northcentral United States were studied from collections made from August 1968 to October 1971. Using the transmission electron microscope with carbon replicas of the frustule surfaces, taxonomically significant characters were identified and related to those visible with the light microscope, four morphologically distinguishable taxa were recognized. The frustular morphology of T. fenestrata (Lyngbye) kütz. em. Knudson var. fenestrata was confirmed by both light and electron microscopy. T. flocculosa (Roth) Kütz. var. flocculosa is composed of 3 morphologically distinguishable strains. One of which is sufficiently different from the nominate variety to be described as T. flocculosa var. linearis var. nov. Also, a planktonic ecotype of one of the strains was identified.