Systématique, biogéographie et diversification du genre Crudia (Leguminosae, Detarioideae)

Latest version published by Université de Montréal Biodiversity Centre on Aug 1, 2018 Université de Montréal Biodiversity Centre

In the subfamily Detarioideae (Leguminosae), the genus Crudia Schreb. shows an unusual pantropical distribution and high species richness compared to closely related genera. Crudia species, spread throughout South America, West Africa and Southeastern Asia, have been the focus of independent taxonomic studies conducted by several consecutive authors. To date, however, the evolution and biogeographic history of this genus remain poorly understood. We propose a multidisciplinary approach to study this poorly known genus and to improve our understanding of its evolutionary history. This dataset is the sampling used for this project, with link to specific specimens and sequences (in GenBank).

Data Records

The data in this occurrence resource has been published as a Darwin Core Archive (DwC-A), which is a standardized format for sharing biodiversity data as a set of one or more data tables. The core data table contains 137 records.

This IPT archives the data and thus serves as the data repository. The data and resource metadata are available for download in the downloads section. The versions table lists other versions of the resource that have been made publicly available and allows tracking changes made to the resource over time.

Downloads

Download the latest version of this resource data as a Darwin Core Archive (DwC-A) or the resource metadata as EML or RTF:

Data as a DwC-A file download 137 records in English (22 KB) - Update frequency: not planned
Metadata as an EML file download in English (10 KB)
Metadata as an RTF file download in English (8 KB)

Versions

The table below shows only published versions of the resource that are publicly accessible.

How to cite

Researchers should cite this work as follows:

Domenech B (2018): Systématique, biogéographie et diversification du genre Crudia (Leguminosae, Detarioideae). v1.0. Université de Montréal Biodiversity Centre. Dataset/Occurrence. https://doi.org/10.5886/dpabji

Rights

Researchers should respect the following rights statement:

The publisher and rights holder of this work is Université de Montréal Biodiversity Centre. This work is licensed under a Creative Commons Attribution (CC-BY) 4.0 License.

GBIF Registration

This resource has not been registered with GBIF

Keywords

Occurrence; Specimen; Crudia; Detarioideae; taxonomic revision; phylogeny; evolution; biogeography; divergence time; systematic; ecological niche; diversification; tropical biomes

Contacts

Who created the resource:

Boris Domenech
Ph.D. Student
Université de Montréal 4101 rue Sherbrooke est H1X 2B2 Montreal QC CA

Who can answer questions about the resource:

Boris Domenech
Ph.D. Student
Université de Montréal 4101 rue Sherbrooke est H1X 2B2 Montreal QC CA

Who filled in the metadata:

Boris Domenech
Ph.D. Student
IRBV, Université de Montréal 4101 rue Sherbrooke est H1X 2B2 Montréal Québec CA

Who else was associated with the resource:

Principal Investigator
Anne Bruneau
Professor
IRBV, Université de Montréal 4101, Sherbrooke Est H1X 2B2 Montréal Québec CA

Geographic Coverage

Sampling worldwide, but focused on tropical areas, ecological niches for genus Crudia.

Bounding Coordinates South West [-90, -180], North East [90, 180]

Taxonomic Coverage

No Description available

Kingdom  Plantae
Family  Leguminosae (Legumes)
Genus  Crudia

Temporal Coverage

Start Date / End Date 1907-01-01 / 2015-01-01

Project Data

In the subfamily Detarioideae (Leguminosae), the genus Crudia Schreb. shows an unusual pantropical distribution and high species richness compared to closely related genera. Crudia species, spread throughout South America, West Africa and Southeastern Asia, have been the focus of independent taxonomic studies conducted by several consecutive authors. To date, however, the evolution and biogeographic history of this genus remain poorly understood. We propose a multidisciplinary approach to study this poorly known genus and to improve our understanding of its evolutionary history. First, we conducted a taxonomic revision of Asian species within the genus Crudia, in accordance with the recent revisions of African and American species. We used traditional taxonomic methods by compiling morphological data based on the study of herbarium specimens. From an initial description of thirty five species from the literature, we retained fourteen species and synonymized the others except for one we consider as a doubtful species. A newly described species was also added. Species geographic distributions were reevaluated and new conservation statuses were suggested. Second, we established a conceptual framework to study the evolution, biogeographic history, and relationship between species of this genus. We sequenced five nuclear regions (ITS, ETS, AGT1, CALTL, and AIGP) on numerous sampled herbarium specimens (K, US, P, L, WAG, U). The phylogenetic analyses resolve Crudia as monophyletic with a well-identified internal structure composed of one clade grouping all Asian species and one clade grouping both African and American species, with the American species grouped in a single clade. Reconstructions of biogeographic history and an associated divergence time analysis calibrated with macrofossils show Crudia originated in Africa during the Eocene and underwent two independent dispersal events during mid-Eocene: from Africa to South America and from Africa to Southeastern Asia. Third, we tested if species richness in the genus Crudia is associated with changes in diversification rates through time and with ecological niche shifts throughout its global distribution. We used species occurrence data, carefully selected to avoid identification errors, associated with environmental data retrieved from the literature. Diversification rates were studied both at the scale of the genus Crudia and the Detarioideae subfamily. We conclude that ecological niches differ from one continent to another and no diversification rates changes were detected in the genus Crudia. Our finding suggest that the greater species richness in Crudia compared to sister genera may be the consequence of relatively older age of this genus.

Title Systématique, biogéographie et diversification du genre Crudia (Leguminosae, Detarioideae)

The personnel involved in the project:

Author
Boris Domenech

Additional Metadata

Alternative Identifiers doi:10.5886/dpabji
http://data.canadensys.net/ipt/resource?r=crudia-specimens