Smithsonian Marine Station at Fort Pierce

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Figure 1


Figure 2.

Species Name: Cyclophora minor Ashworth et Lobban
Common Name: None
Synonymy: None
  1. TAXONOMY

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

    Species Description

    This species was recently described from Guam, and the authors (Ashworth et al. 2012) provide the following description:

    Valves elliptic-lanceolate, length 6.9-17.1µm, width 2.0-3.0µm, one or both valves with pseudoseptum. Striae 40-46 in 10µm, parallel throughout, absent within the area enclosed by the pseudoseptum; on pseudoseptate valves hyaline area reached to valve border. Valve mantle deeper at the pseudoseptum. One rimoportula near each pole, internally small. Pseudoseptum pyramidal, attached to mantle as well as valve face, truncated on abvalvar side with small aperture, small apical pore field of four to five slits, without rim. Copulae several to many, with two rows of areolae.

    The few specimens seen in the IRL concur closely with this description, except for a maximum length of 17.8µm and a maximum width of 4.0µm. Figure 1 (SEM) is a pseudoseptate valve, interior, 4.0µm wide; Figure 2 (SEM) is also a valve interior, 17.8µm in length, with subrostrate apices, lacking a pseudoseptum, with several girdle bands. Both figures have a rimoportula near each apex. The species was fairly common in the IRL system, though never abundant.

  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

    Ashworth MP, Ruck EC, Lobban CS, Romanovicz DK, Theriot EC. 2012. A revision of the genus Cyclophora and description of Astrosyne gen. nov. (Bacillariophyta), two genera with the pyrenoids contained within pseudosepta. Phycologia 51: 684-699.

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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