Nannotax3 - ntax_non_cocco - Chrysochromulina mactra

Chrysochromulina mactra

Classification: ntax_non_cocco -> Haptophytes -> Prymnesiales -> Chrysochromulinaceae -> Chrysochromulina -> likely pryms -> Chrysochromulina mactra
Sister taxa: C. bergenensis, C. birgeri, C. brachycylindra, C. fragilis, C. mactra, C. mantoniae, C. pringsheimii


Citation: Chrysochromulina mactra Manton 1972
Rank: Species
Basionym: Chrysochromulina mactra Manton 1972
Taxonomic discussion: not saddle shaped so likely in Prymnesium group (Edvardsen et al. 2011)

Catalog entries: Chrysochromulina mactra

Original description: Cells 15-20 µm in length and breadth. Two equal flagella, 20--40 µm long. Haptonema 30-40 µm long when fully extended, coiled into a helix of about 12 gyres when retracted. Two gulden-brown plastids, bifid posteriorly; each with a large bulging pyrenoid attached near the base of the cleft. Scales large, rimless, very thin and of two kinds: the outermost tub-shaped, the innermost platelike. Plate scales usually 2 x 1.6 µm though with a few much smaller ones, all with a pattern of ridges radiating from a quadrangular plain centre visible on both surfaces, the ridges extending to the edge on the proximal surface but covered with a thin finely striated band peripherally on the distal surface. Tub-shaped scales with straight sides, up to 1.5 µm high, slightly diverging, transversely striated, and a flat base 1 x 1-3 µm wide, marked by a pattern of radiating ridges.

Type images:



Ecology & Biogeography

Biology & life-cycles

Phylogenetic relations

Geological Range:
Last occurrence (top): Extant. Data source:
First occurrence (base): within No known fossil record modern (0.00-0.00Ma, base in "Holocene" stage). Data source:


Manton, I. (1972). Preliminary observations on Chrysochromulina mactra sp. nov. British Phycological Journal. 7: 21-35. gs V O


Chrysochromulina mactra compiled by Jeremy R. Young viewed: 3-12-2022

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