Larridon, Isabel; Bauters, Kenneth; Semmouri, Ilias; Viljoen, Jan-Adriaan; Prychid, Christina J; Muasya, A Muthama; Bruhl, Jeremy J; Wilson, Karen L; Senterre, Bruno; Goetghebeur, Paul

Author(s)

Larridon, Isabel

Bauters, Kenneth

Semmouri, Ilias

Viljoen, Jan-Adriaan

Prychid, Christina J

Muasya, A Muthama

Bruhl, Jeremy J

Wilson, Karen L

Senterre, Bruno

Goetghebeur, Paul

Publication Date

2018-09

Abstract

We investigated the monophyly of Costularia (25 species), a genus of tribe Schoeneae (Cyperaceae) that illustrates a remarkable distribution pattern from southeastern Africa, over Madagascar, the Mascarenes and Seychelles, to Malesia and New Caledonia. A further species, Tetraria borneensis, has been suggested to belong to Costularia. Relationships and divergence times were inferred using an existing four marker phylogeny of Cyperaceae tribe Schoeneae expanded with newly generated sequence data mainly for Costularia s.l. species. Phylogenetic reconstruction was executed using Bayesian inference and maximum likelihood approaches. Divergence times were estimated using a relaxed molecular clock model, calibrated with fossil data. Based on our results, Tetraria borneensis is not related to the species of Costularia. Costularia s.l. is composed of four distinct evolutionary lineages. Two lineages, one including the type species, are part of the Oreobolus clade, i.e. a much reduced genus Costularia restricted to southeastern Africa, Madagascar, the Mascarenes and Seychelles, and a small endemic genus from New Caledonia for which a new genus Chamaedendron is erected based on Costularia subgenus Chamaedendron. The other two lineages are part of the Tricostularia clade, i.e. a separate single-species lineage from the Seychelles for which a new genus (Xyroschoenus) is described, and Costularia subgenus Lophoschoenus. For the latter, more research is needed to test whether they are congeneric with the species placed in the reticulate-sheathed Tetraria clade.

Citation

Molecular Phylogenetics and Evolution, v.126, p. 196-209

ISSN

1095-9513

1055-7903

Pubmed ID

29679713

Link

https://hdl.handle.net/1959.11/36830

Publisher

Academic Press

Title

Molecular phylogenetics of the genus Costularia (Schoeneae, Cyperaceae) reveals multiple distinct evolutionary lineages

Type of document

Journal Article

Entity Type

Publication

Author(s)	Larridon, Isabel Bauters, Kenneth Semmouri, Ilias Viljoen, Jan-Adriaan Prychid, Christina J Muasya, A Muthama Bruhl, Jeremy J Wilson, Karen L Senterre, Bruno Goetghebeur, Paul
Publication Date	2018-09
Abstract	<p>We investigated the monophyly of <i>Costularia</i> (25 species), a genus of tribe Schoeneae (Cyperaceae) that illustrates a remarkable distribution pattern from southeastern Africa, over Madagascar, the Mascarenes and Seychelles, to Malesia and New Caledonia. A further species, <i>Tetraria borneensis</i>, has been suggested to belong to <i>Costularia</i>. Relationships and divergence times were inferred using an existing four marker phylogeny of Cyperaceae tribe Schoeneae expanded with newly generated sequence data mainly for <i>Costularia s.l.</i> species. Phylogenetic reconstruction was executed using Bayesian inference and maximum likelihood approaches. Divergence times were estimated using a relaxed molecular clock model, calibrated with fossil data. Based on our results, <i>Tetraria borneensis</i> is not related to the species of <i>Costularia. Costularia s.l.</i> is composed of four distinct evolutionary lineages. Two lineages, one including the type species, are part of the <i>Oreobolus</i> clade, i.e. a much reduced genus <i>Costularia</i> restricted to southeastern Africa, Madagascar, the Mascarenes and Seychelles, and a small endemic genus from New Caledonia for which a new genus <i>Chamaedendron</i> is erected based on <i>Costularia</i> subgenus <i>Chamaedendron</i>. The other two lineages are part of the <i>Tricostularia</i> clade, i.e. a separate single-species lineage from the Seychelles for which a new genus (<i>Xyroschoenus</i>) is described, and <i>Costularia</i> subgenus <i>Lophoschoenus</i>. For the latter, more research is needed to test whether they are congeneric with the species placed in the reticulate-sheathed <i>Tetraria</i> clade.</p>
Citation	Molecular Phylogenetics and Evolution, v.126, p. 196-209
ISSN	1095-9513 1055-7903
Pubmed ID	29679713
Link	https://hdl.handle.net/1959.11/36830
Publisher	Academic Press
Title	Molecular phylogenetics of the genus Costularia (Schoeneae, Cyperaceae) reveals multiple distinct evolutionary lineages
Type of document	Journal Article
Entity Type	Publication

Molecular phylogenetics of the genus Costularia (Schoeneae, Cyperaceae) reveals multiple distinct evolutionary lineages

Files: