Hyalolithus neolepis

Taxonomy:

Catalog entries: Hyalolithus neolepis

Original description: Cells having at least two forms. Cells non-motile, spherical to subspherical, measuring 8-12 µm, having a posterior vacuole and hyaline hollow space. Two yellowish chloroplasts, each with an immersed pyrenoid. Nucleus central, Golgi body parabasal. Two short flagella, 1.5 µm at longest. A non-coiling haptonema, 12-18 µm long. Periplast covered with two different types of scales. The outer layer consisting of hat-shaped siliceous scales, oval to irregularly ellipsoidal in top view, measuring 5-7 and 4-6 µm across the axes, having many small pores (0.1-0.3 µm) in bulging central area. The brim of scales recurved, not perforated. The inner layer of organic scales, elliptical, measuring 0.6 and 0.4 µm across the axes, with 92-100 rough radial ridges and fine concentric patterns.

Motile phase cell subspherical to pear-shaped. Chloroplasts two, yellowish. Two equal flagella, 15-25 µm long. A non-coiling haptonema, 12-18 µm long. Periplast covered with short spine scales, oval to ellipsoidal in top view, with a maximum area of 2 and 3 µm across the axes, many small pores arranged in a radial pattern (72-120), ridge, marginal thickening.

Morphology:

Cultures: Strains of this species are maintained in culture, for details see Roscoff Culture Collection.

Geological Range:
Notes: There are only a very few fossil records but convincing Hyalolithus speciemens have been recorded from the Middle Eocene by Abe et al. (2016)
Last occurrence (top): Extant. Data source: present in the plantkon
First occurrence (base): within Middle Eocene Sub-Epoch (37.75-47.84Ma, base in Lutetian stage). Data source: Abe et al. in press (cited in Jordan et al. 2016)

Hyalolithus neolepis compiled by Jeremy R. Young viewed: 30-4-2025 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=20194 Go to Archive.is to create a permanent copy of this page - citation notes

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