author={James A. Deane and Isabelle M. Strachan and Gary W. Saunders and David R. A. Hill and Geoffrey Ian McFadden},
  journal={Journal of Phycology},
A nuclear18S rDNA phylogeny for cryptomonad algae is presented, including 11 species yet to be investigated by molecular means. The phylogenetic positions of the cryptomonad genera Campylomonas and Plagioselmis are assessed for the first time. Campylomonas groups most closely with morphologically similar species with the same accessory pigment from the genus Cryptomonas. Plagioselmis groups with the genera Teleaulax and Geminigera forming a clade whose members are united by unusual thylakoid… 

Revision of the genus Cryptomonas (Cryptophyceae): a combination of molecular phylogeny and morphology provides insights into a long-hidden dimorphism.

The results of the phylogenetic study provide molecular evidence for a life history-dependent dimorphism in the genus cryptomonas: the genus Campylomonas represents the alternate morph of Cryptomonas.


The Chroomonas/Hemiselmis/Komma clade proved to be the most diverse of all cryptophyte clades concerning types of biliproteins and distribution of clades across marine or freshwater habitats.

Taxonomy and phylogeny of the genus Cryptomonas (Cryptophyceae, Cryptophyta) from Korea

To understand species delineation and phylogenetic relationships among Cryptomonas species, the nuclear-encoded internal transcribed spacer 2 (ITS2), partial large subunit (LSU) and small subunit ribosomal DNA (rDNA), and chloroplast-encoding psbA and LSU rDNA sequences were determined and used for phylogenetic analyses, using Bayesian and maximum likelihood methods.

Revision of the genus Cryptomonas (Cryptophyceae) II: incongruences between the classical morphospecies concept and molecular phylogeny in smaller pyrenoid-less cells

A reverse ( =  DNA-based) taxonomy approach was used to predict putative biological species in the genus Cryptomonas and five species descriptions were emended by adding molecular signatures as diagnostic characters including a new combination, cryptomonas commutata (Pascher) Hoef-Emden comb.

Evolutionary Dynamics of Cryptophyte Plastid Genomes

A comparative analysis of plastid genomes from six representative cryptophyte genera reveals examples of gene loss and intron insertion in cryptophytes, and the chlB/chlL/ chlN genes, which encode light-independent (dark active) protochlorophyllide oxidoreductase (LIPOR) proteins have undergone recent gene loss, pseudogenization, and pseudogenized in Cryptomonas paramecium.

Diversification of unicellular eukaryotes: cryptomonad colonizations of marine and fresh waters inferred from revised 18S rRNA phylogeny.

The inferred phylogenies suggest only few successful marine-freshwater transitions over the history of cryptomonads, which implies that the differences in the biogeophysical conditions between marine and fresh waters constitute a substantial barrier for the cross-colonization of these environments by cryptomonADs.

Complete Nucleomorph Genome Sequence of the Nonphotosynthetic Alga Cryptomonas paramecium Reveals a Core Nucleomorph Gene Set

An unexpected degree of overlap in the genes present in the independently evolved chlorarachniophyte and cryptomonad nucleomorph genomes is revealed, suggesting that similar reductive processes have taken place in unrelated lineages of nucleomorph-containing algae.

Comparative mitochondrial genomics of cryptophyte algae: gene shuffling and dynamic mobile genetic elements

These newly sequenced genomes increase the breadth of data available from algae and will aid in the identification of general trends in mitochondrial genome evolution, and underscore the different evolutionary histories of the host and endosymbiont components of present-day cryptophytes.

Morphological examination and phylogenetic position of two newly recorded freshwater Cryptomonas species (Cryptophyceae) from China

Nuclear and nucleomorph small subunit rDNA phylogenetic analyses revealed Cryptomonas curvata collected from China was very similar to C. curvata strains cultivated in Germany, and the closest relative of C. obovata was found to be C. pyrenoidifera Geitler.



The origin of red algae and cryptomonad nucleomorphs: A comparative phylogeny based on small and large subunit rRNA sequences of Palmaria palmata, Gracilaria verrucosa, and the Guillardia theta nucleomorph.

The results support the hypothesis that the cryptomonad plastid is derived from a primitive red alga, in that an ancient common ancestor of rhodophytes and Cryptomonad nucleomorphs is indicated.

Comparisons of nuclear-encoded small-subunit ribosomal RNAs reveal the evolutionary position of the Glaucocystophyta.

Maximum likelihood, maximum-parsimony, and neighbor-joining phylogenetic analyses show that the Glaucocystophyta is a relatively late-diverging monophyletic assemblage within the "crown" group radiation that forms a sister group to cryptophyte algae.

Cryptomonad algae are evolutionary chimaeras of two phylogenetically distinct unicellular eukaryotes

It is shown here that Cryptomonas Φ contains two phylogenetically separate, nuclear-type small-subunit rRNA genes, both of which are transcriptionally active and infer the evolutionary ancestry of the host and symbiont components of Cryptomona Φ.

Cryptomonad nuclear and nucleomorph 18S rRNA phylogeny

Nuclear and nucleomorph 18S ribosomal RNA genes from six cryptomonads were amplified by the polymerase chain reaction and sequenced, giving more convincing evidence than before that cryptomonad nucleomorphs originated from a red alga and are not specifically related to Chlorarachnion nucleomorphics.

A revised classification of Cryptophyta

Using ultrastructural, biochemical and molecular data, a classification scheme, which delineates 16 genera, is proposed for the Cryptophyta, which accommodates three new families, the Campylomonadaceae, Geminigeraceae, and Chroomonadaceae.

Hanusia phi gen. et sp. nov. (Cryptophyceae): characterization of ‘Cryptomonas sp. Φ’

Cryptomonas sp. Φ is an undescribed cryptomonad used for many studies into the endosymbiotic origin of plastids. Cryptomonas sp. Φ was characterized using electron microscopy, DNA sequencing and

Nuclear-encoded, plastid-targeted genes suggest a single common origin for apicomplexan and dinoflagellate plastids.

Results address several outstanding issues and indicate that apicomplexan and dinoflagellate plastids appear to be the result of a single endosymbiotic event which occurred relatively early in eukaryotic evolution, also giving rise to the plastid-targeted GAPDH genes of heterokonts and cryptomonads.

Goniomonas : rRNA sequences indicate that this phagotrophic flagellate is a close relative of the host component of cryptomonads

The molecular phylogeny supports morphological data suggesting that Goniomonas diverted from the cryptomonad lineage prior to their acquisition of a plastid through endosymbiosis of a eukaryote.