Smithsonian Marine Station at Fort Pierce

Website Search Box

Advanced Search


Figure 1


Figure 2.


Figure 3.


Figure 4.

Species Name: Ditylum sol (Grunow ex van Heurck) de Toni
Common Name: None
Synonymy: None
  1. TAXONOMY

    Kingdom Phylum/Division Class: Order: Family: Genus:
    Protista Bacillariophyta Mediophyceae - - Ditylum

    Species Description

    Cells are solitary and triangular in valve view, with a rectangular outline in girdle view. There is a centrally located hollow spine on each valve that is about equal in length to the pervalvar axis of the cell (Fig. 1, modified from Hustedt 1930-61). The valves have a triangular ridge with concave side that tapers as it approaches each of the three sides (Fig. 2, 3; LM phase contrast). The edges of the valve (Fig. 2) are undulating (crenulate) and the crenulation extends throughout the many girdle bands (Fig. 4, modified from von Stosch 1986). Areolae near the valve center are larger the other radially arranged areolae (a feature it shares with D. brightwellii but may be indistinct with light microscopy) and the diameter range overlaps substantially (40-225µm for D. sol, 23-100µm for D. brightwellii). D. sol has 19-20 areolae in 10µm and D. brightwellii has about 10 areolae in 10µm. Moreover, D. brightwellii has a much broader and elongate marginal ridge, usually slotted: D. sol does not. An excellent comparison of the two species is found in von Stosch (1986). D. sol is a tropical coastal species, quite rare in the IRL. D. brightwellii is common in the IRL, and sometimes 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

    Hustedt F. 1930-1961. 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.

    von Stosch HA. 1986. Some marine diatoms from the Australian region, especially from Port Phillip Bay and tropical north-eastern Australia. Brunonia8:293-348.

Unless otherwise noted, all images and text by PE Hargraves
Editing and page maintenance by LH Sweat
For questions, comments or contributions, please contact us at:
irl_webmaster@si.edu
Page last updated: 28 April 2015

[ TOP ]