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Fine structural studies on an ultraplanktonic species of Pyramimonas, P. virginica (Prasinophyceae), with a discussion of subgenera within the genus Pyramimonas
TLDR
The ultrastructure of Pyramimonas virginica, the only known ultraplanktonic species of Pyramsimonas, has been examined in detail and numbering of individual flagella in different species has shown a surprising variation in the orientation of the flagellar apparatus relative to the rest of the cell. Expand
MITOSIS AND CELL DIVISION IN HYDRURUS FOETIDUS (CHRYSOPHYCEAE) 1
TLDR
Persistence of the spindle and lack of Ochromoms‐type cell elongation may be related to the constricting presence of the sheath during cell division—a completely different strategy to that adopted by the green algae under conditions of similar constraint. Expand
ATRACTOMORPHA ECHINATA GEN. ET SP. NOV., A NEW ANISOGAMOUS MEMBER OF THE SPHAEROPLEACEAE (CHLOROPHYCEAE) 1, 2
TLDR
The new genus Atractomorpha echinata is distinguished from Sphaeroplea primarily by its pattern of vegetative growth, and is further characterized by the regular formation of biflagellate zoospores in asexual reproduction. Expand
OBSERVATIONS ON THE FINE STRUCTURE OF OEDOGONIUM. III. MICROTUBULAR ELEMENTS IN THE CHLOROPLASTS OF OE. CARDIACUM 1 2
  • L. Hoffman
  • Biology, Medicine
  • Journal of phycology
  • 1 December 1967
TLDR
The expansive, reticulate cliloroplasts of the filamentous green alga Oedogonium tardiacum were found to contain microtubular elements with an outside diameter of about 270 A, and the overall appearance suggests that each is constructed of 2 helically wound, ribbon‐like units that are approximately 155‐175 A broad and 45‐55 A thick. Expand
ULTRASTRUCTURE OF MALE GAMETES OF SPHAEROPLEA ROBUSTA (CHLOROPHYCEAE) 1
TLDR
Possession of a striated distal fiber, a cruciate flagellar root system (i.e. two‐stranded microtubular roots alternating with multistranded roots), and directly opposed basal bodies are consistent with the alga's chlorophycean affinities. Expand
Fine structure ofCylindrocapsa zoospores
TLDR
Quadriflagellate zoospores from an isolate ofCylindrocapsa geminella have been studied ultrastructurally and preliminary observations are given on the structure of the flagellar apparatus. Expand
Structure and reproduction of Sphaeroplea fragilis sp.nov., a new member of the Sphaeropleaceae (Chlorophyceae) from California
TLDR
A new species of Sphaeroplea is described from material collected near Lemoncove, California, which possesses a combination of features that clearly support its status as a distinct member of the Sphaenopleaceae. Expand
OBSERVATIONS ON THE FINE STRUCTURE OF OEDOGONIUM. V. EVIDENCE FOR THE DE NOVO FORMATION OF PYRENOIDS IN ZOOSPORES OF OE. CARDIACUM 1 2 3
  • L. Hoffman
  • Biology, Medicine
  • Journal of phycology
  • 1 September 1968
TLDR
The incipient pyrenoids lack the associated starch grains and the membrane‐limited channels characteristic of mature pyrenoid, but they are readily recognized in the chloroplasts since they demonstrate a greater granularity and electron density than the surrounding chloroplast stroma. Expand
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