Systematics/Phytogeography / Taxonomie/ Section
Schaefer, Hanno , Renner, Susanne S .
A phylogenetic classification of the Cucurbitaceae and a treatment for Families and Genera of Vascular Plants.
Based on a multi-locus chloroplast phylogeny for most genera of Cucurbitaceae that samples 25% of the 960 species, we have revised the family's classification to achieve better agreement between evolutionary relationships and taxon circumscription and ranking in this economically important family. The only genus not sampled is Khmeriosicyos W. J. de Wilde and Duyfjes, a monotypic genus from Cambodia known only from the type. Earlier classifications recognized two subfamilies, but molecular data so far do not support a single basal-most split. Instead, there are five well supported clades (Fig. 1): (i) a clade of few Asian genera, including Alsomitra, Bayabusua, and Neoalsomitra, corresponding to the Gomphogyneae Bentham and Hooker, (ii) one African and a few Neotropical genera, including Fevillea and Sicydium, corresponding to the Fevilleeae Bentham and Hooker; (iii) a few genera from Madagascar, continental Africa, Asia, and South America, corresponding to Zanonieae Blume; (iv) the two Asian genera Actinostemma and Bolbostemma, and (v) a group of c. 100 genera traditionally placed in subfamily Cucurbitoideae. We have allocated the latter genera to 11 tribes, preserving traditional circumscriptions as much as possible. Tribal names and relationships are shown in Fig. 1. A key to all genera and brief generic descriptions are included in a treatment for the book series Families and Genera of Vascular Plants. The treatment also includes general sections on morphology, anatomy, palynology, chemistry, pollination and seed dispersal, and the fossil record of Cucurbitaceae. We are eager to discuss aspects of this treatment with all interested.
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1 - University of Munich, Organismal Biology, Menzingerstr. 67, Munich, 80638, Germany
Presentation Type: Poster:Posters for Sections
Location: Ball Room & Party Room/SUB
Date: Monday, July 28th, 2008
Time: 12:30 PM