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Phylogenetic analysis of Pseudochlorodesmis strains reveals cryptic diversity above the family level in the siphonous green algae (Bryopsidales, Chlorophyta)

(2009) JOURNAL OF PHYCOLOGY. 45(3). p.726-731
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Abstract
The genus Pseudochlorodesmis (Bryopsidales) is composed of diminutive siphons of extreme morphological simplicity. The discovery of Pseudochlorodesmis-like juveniles in more complex Bryopsidales (e.g., the Halimeda microthallus stage) jeopardized the recognition of this genus. Confronted with this uncertainty, taxonomists transferred many simple siphons into a new genus, Siphonogramen. In this study, we used a multimarker approach to clarify the phylogenetic and taxonomic affinities of the Pseudochlorodesmis-Siphonogramen (PS) complex within the more morphologically complex bryopsidalean taxa. Our analyses reveal a new layer of diversity largely distinct from the lineages containing the structurally complex genera. The PS complex shows profound cryptic diversity exceeding the family level. We discuss a potential link between thallus complexity and the prevalence and profundity of cryptic diversity. For taxonomic simplicity and as a first step toward clarifying the taxonomy of these simple siphons, we propose to maintain Pseudochlorodesmis as a form genus and subsume Siphonogramen and Botryodesmis therein.
Keywords
HALIMEDA, CYCLE, CAULERPALES, MOLECULAR PHYLOGENY, Bryopsidales, Botryodesmis, Siphonogramen, thallus complexity, Pseudochlorodesmis, cryptic diversity, molecular phylogenetics, INFERENCE, ALGORITHM, TAXONOMY, MODEL, GENE

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Chicago
Verbruggen, Heroen, Caroline Vlaeminck, Thomas Sauvage, Alison R Sherwood, Frédérik Leliaert, and Olivier De Clerck. 2009. “Phylogenetic Analysis of Pseudochlorodesmis Strains Reveals Cryptic Diversity Above the Family Level in the Siphonous Green Algae (Bryopsidales, Chlorophyta).” Journal of Phycology 45 (3): 726–731.
APA
Verbruggen, Heroen, Vlaeminck, C., Sauvage, T., Sherwood, A. R., Leliaert, F., & De Clerck, O. (2009). Phylogenetic analysis of Pseudochlorodesmis strains reveals cryptic diversity above the family level in the siphonous green algae (Bryopsidales, Chlorophyta). JOURNAL OF PHYCOLOGY, 45(3), 726–731.
Vancouver
1.
Verbruggen H, Vlaeminck C, Sauvage T, Sherwood AR, Leliaert F, De Clerck O. Phylogenetic analysis of Pseudochlorodesmis strains reveals cryptic diversity above the family level in the siphonous green algae (Bryopsidales, Chlorophyta). JOURNAL OF PHYCOLOGY. 2009;45(3):726–31.
MLA
Verbruggen, Heroen, Caroline Vlaeminck, Thomas Sauvage, et al. “Phylogenetic Analysis of Pseudochlorodesmis Strains Reveals Cryptic Diversity Above the Family Level in the Siphonous Green Algae (Bryopsidales, Chlorophyta).” JOURNAL OF PHYCOLOGY 45.3 (2009): 726–731. Print.
@article{691573,
  abstract     = {The genus Pseudochlorodesmis (Bryopsidales) is composed of diminutive siphons of extreme morphological simplicity. The discovery of Pseudochlorodesmis-like juveniles in more complex Bryopsidales (e.g., the Halimeda microthallus stage) jeopardized the recognition of this genus. Confronted with this uncertainty, taxonomists transferred many simple siphons into a new genus, Siphonogramen. In this study, we used a multimarker approach to clarify the phylogenetic and taxonomic affinities of the Pseudochlorodesmis-Siphonogramen (PS) complex within the more morphologically complex bryopsidalean taxa. Our analyses reveal a new layer of diversity largely distinct from the lineages containing the structurally complex genera. The PS complex shows profound cryptic diversity exceeding the family level. We discuss a potential link between thallus complexity and the prevalence and profundity of cryptic diversity. For taxonomic simplicity and as a first step toward clarifying the taxonomy of these simple siphons, we propose to maintain Pseudochlorodesmis as a form genus and subsume Siphonogramen and Botryodesmis therein.},
  author       = {Verbruggen, Heroen and Vlaeminck, Caroline and Sauvage, Thomas and Sherwood, Alison R and Leliaert, Fr{\'e}d{\'e}rik and De Clerck, Olivier},
  issn         = {0022-3646},
  journal      = {JOURNAL OF PHYCOLOGY},
  keyword      = {HALIMEDA,CYCLE,CAULERPALES,MOLECULAR PHYLOGENY,Bryopsidales,Botryodesmis,Siphonogramen,thallus complexity,Pseudochlorodesmis,cryptic diversity,molecular phylogenetics,INFERENCE,ALGORITHM,TAXONOMY,MODEL,GENE},
  language     = {eng},
  number       = {3},
  pages        = {726--731},
  title        = {Phylogenetic analysis of Pseudochlorodesmis strains reveals cryptic diversity above the family level in the siphonous green algae (Bryopsidales, Chlorophyta)},
  url          = {http://dx.doi.org/10.1111/j.1529-8817.2009.00690.x},
  volume       = {45},
  year         = {2009},
}

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