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Figure 1.


Figure 2.


Figure 3.

Species Name: Amphipleura pellucida (Kützing) Kützing
Common Name: None
Synonymy: None
  1. TAXONOMY

    Kingdom Phylum/Division Class: Order: Family: Genus:
    Protista Bacillariophyta Bacillariophycea - - Amphipleura

    Species Description

    Cells are solitary and possess a single H-shaped chloroplast (Fig. 1, living cell, phase contrast).  The valves are generally spindle-shaped or linear with somewhat narrowed and rounded apices.  The raphe slits are short, rarely over 20% of the valve length, and flanked by hyaline ribs, which are connected to a narrow longitudinal axial sternum (Fig. 3, SEM of valve interior).  Cells are commonly reported to be 80-140µm long and 7-9µm wide, but can be as short as 60µm (Krizmanic et al. 2008).  The striae are barely visible in the light microscope without high quality optics, numbering 37-45 in 10µm - near the limit of resolution by light microscopy (Fig. 2, line drawing and valve detail modified from Hustedt 1931-66).  For this reason, A. pellucida was frequently used as a test organism for microscope resolution (Cox 1975).  The striae are clearly visible with SEM (Fig. 3).  The species has a widespread global distribution and is nominally a freshwater species, but has been known to survive in brackish conditions (Hustedt 1931-1966).  In the IRL, A. pellucida was found rarely near the outflow of the main drainage canal in Vero Beach and at the mouth of the Sebastian River.  Since it was seen alive, it probably is a halotolerant strain, and not just a case of dead cells advected in.

  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

    Cox E. 1975. A reappraisal of the diatom genus Amphipleura Kütz. using light and electron microscopy. Eur J Phycol 10: 1-12.

    Hustedt F. 1931-1966. Die Kieselalgen Deutschlands, Österreichs und der Schweiz. Dr. L. Rabenhorsts Kryptogamen-Flora von Deutschland, Österreich und der Schweiz. 7(1): 1—920; 7(2); 1-845; 7(3): 1-816.

    Krizmanic JA, Rzanicanin G, Subakov-Simic G, Cvijan M. 2008. Amphipleura pellicida (Kütz.) Kütz. – an emended diagnosis concerning valve length. Diat Res 23: 243-248.

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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