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Figure 1A


Figure 1B


Figure 2


Figure 3.

Species Name: Haslea clevei Hinz, Hargraves et Sterrenburg
Common Name: None
Synonymy: None
  1. TAXONOMY

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

    Species Description

    With the generic characteristics of Haslea (see H. amicorum). This species is lanceolate (Fig. 1A, SEM of external surface, modified from Figure 48 in Sterrenburg et al. 2015; Fig. 1B, SEM of external surface, from IRL ) with few, if any, structures such as striae or axial area visible in the light microscope. Thus, electron microscopy is needed for identification. The cells are delicate and fragile. The transverse striae on the basal layer are offset, i.e., the striae on one side of the raphe line up well with the interstriae on the other side (Fig. 2, SEM, detail of Fig. 1; Fig. 3, SEM of internal surface). The external central raphe endings are in small depressions or pits which often fuse in the axial area (Fig. 2, SEM detail of Fig. 1A). Valves are 85-110µm long and about 10-12µm wide, with ~ 23 transverse and ~ 30 longitudinal striae in 10µm. Areolae in the basal layer are square (Fig. 3).

    This species occurs occasionally in the IRL system, and otherwise is known only from the type locality, Måsoy, Norway.

  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

    Sterrenburg FAS, Tiffany MA, Herwig WE, Hargraves PE. 2015. Seven new species expand the morphological spectrum of Haslea. A comparison with Gyrosigma and Pleurosigma (Bacillariophyta). Phytotaxa 207: 143-162.

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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