Smithsonian Marine Station at Fort Pierce

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Figure 1


Figure 2


Figure 3


Figure 4.

Species Name: Licmophora grandis (Kuetzing) Grunow ex Van Heurck
Common Name: None
Synonymy: None
  1. TAXONOMY

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

    Species Description

    In girdle view, cells are wedge-shaped and heteropolar, with a varying number of girdle bands (Fig. 1, upper; line drawing modified from Hustedt 1930-66) and rather narrow in valve view, with a spathulate apex tapering gradually in width to a slightly capitate antapex (Fig. 1, lower; and Fig. 2, SEM external view). The first girdle band has an internal septum that is visible in both girdle and valvar views (Fig. 1, arrows). The valve sternum is narrow but distinct (Fig. 3, detail of Fig. 2). The areolae are somewhat elongate in the transapical axis (Fig. 3), which is an uncommon feature in Licmophora. The apex of the valve shown in Fig. 2 has a rimoportula (Fig. 3); the antapex does not (Fig. 4, detail of Fig. 2). The presence/absence of rimoportulae at either end of Licmophora valves seems to be a variable feature.

    Honeywill (1998) gives a size range of 40-62µm long and 9-10µm wide, while Hustedt (1930-66) gives 90-180µm long and 10-14µm wide. The valve in Fig. 2 is 256µm long and 16µm wide, beyond recorded range, but the similarity of valve shape, areolar shape, and areolar number (22-23 in 10µm) places it in L. grandis. It was seen only in Haulover Canal, between Mosquito Lagoon and the northern IRL; it has been reported from Florida Bay. Globally, it has a wide distribution in temperate and subtropical coastal areas, becoming rare in boreal climates.

  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

    Honeywill C. 1998. A study of British Licmophora species and a discussion of its morphological features. Diat Res 13: 221-271.

    Hustedt F. 1930-1966. Die Kieselalgen Deutschlands, Österreich und der Schweiz. In: Dr. L. Rabenhorst’s Kryptogamen-Flora von Deutschlands, Österreich und der Schweiz 7(1): 1-920, 7(2): 1-845, 7(3): 1-816. J Cramer Verlag, Weinheim.

Unless otherwise noted, all images and text by PE Hargraves
Editing and page maintenance by LH Sweat
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Page last updated: 27 August 2015

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