Smithsonian Marine Station at Fort Pierce

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Figure 1


Figure 2.


Species Name: Nitzschia longissima Brébisson Ralfs
Common Name: None
Synonymy: None
  1. TAXONOMY

    Kingdom Phylum/Division Class: Order: Family: Genus:
    Protista Bacillariophyta Bacillariophyceae - - Nitzschia

    Species Description

    This species somewhat resembles Nitzschia ventricosa, but is much larger and has different ultrastructure. As in N. ventricosa, the valves are lanceolate with very long slender rostrate apices that may be unequal in length (Fig. 1, entire valve, SEM). The raphe is excentric; the striae are transverse. The fibulae subtending the raphe vary somewhat in size and density, and a larger central space is present (Fig. 2, detail of Fig. 1). The prominent irregularly spaced ribs seen in N. ventricosa are lacking in N. longissima. The few cells seen in the IRL were 310-330µm long and 7µm wide, with 40-42 striae in 10µm. The fibulae number 6-7 in 10µm. These measurements are consistent with the dimensions given in various literature sources. The species is widely distributed; it was rare in the IRL system, as was also observed by Navarro (1982).

  2. HABITAT AND DISTRIBUTION

    No information is available at this time

  3. LIFE HISTORY AND POPULATION BIOLOGY

    No information is available at this time

  4. PHYSICAL TOLERANCES

    No information is available at this time

  5. COMMUNITY ECOLOGY

    No information is available at this time

  6. ADDITIONAL INFORMATION

    No information is available at this time

  7. REFERENCES

    Navarro JN. 1982. Marine diatoms associated with mangrove prop roots in the Indian River, Florida, U.S.A.  Biblio Phycol 61: 1-151.

Unless otherwise noted, all images and text by PE Hargraves
Editing and page maintenance by LH Sweat
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Page last updated: 22 September 2015

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