Topic
Saribus
About: Saribus is a research topic. Over the lifetime, 2 publications have been published within this topic receiving 45 citations.
Papers
TL;DR: The correspondence of the results with Southeast Asian geologic and climatic history show how palms emerge as excellent models for understanding the historical formation of fine‐scale biogeographic patterns in a phylogenetic framework.
Abstract: Broad-scale patterns of species diversity have received much attention in the literature, yet the mechanisms behind their formation may not explain species richness disparities across small spatial scales. Few taxa display high species diversity on either side of Wallace’s Line and our understanding of the processes causing this biogeographical pattern remains limited, particularly in plant lineages. To understand the evolution of this biogeographical pattern, a time-calibrated molecular phylogeny of Livistoninae palms (Arecaceae) was used to infer the colonization history of the Sahul tectonic plate region and to test for disparities in diversification rates across taxa and across each side of Wallace’s Line. Our analyses allowed us to examine how timing, migration history, and shifts in diversification rates have contributed to shape the biogeographical pattern observed in Livistoninae. We inferred that each of the three genera found in Sahul crossed Wallace’s Line only once and relatively recently. In addition, at least two of the three dispersing genera underwent an elevation in their diversification rate leading to high species richness on each side of Wallacea. The correspondence of our results with Southeast Asian geologic and climatic history show how palms emerge as excellent models for understanding the historical formation of fine-scale biogeographic patterns in a phylogenetic framework.
51 citations
TL;DR: A new palm species, Livistona exigua, is described from Borneo (Brunei), the first dwarf species known in the genus, which is a genus of fan palms of about 28 species predominantly SE.
Abstract: Summary. A new palm species, Livistona exigua, is described from Borneo (Brunei), the first dwarf species known in the genus. Livistona is a genus of fan palms of about 28 species predominantly SE. Asian and Australian in distribution. The greatest diversity is found in Australia with about eleven species; here the genus ranges from tree palms up to 20-30 m tall down to shrub-like species (e.g. L. humilis R. Br.) with short stocky trunks to 5 m tall. In the Malesian rain forests Livistona is represented by tall tree palms only, these at maturity contributing in some way to the forest canopy, and this has hitherto appeared to be the constant aspect of the genus in these conditions. In the undergrowth another genus of Coryphoid palms, Licuala, has undergone extensive speciation; all except for one or two tree species (e.g. Licuala muelleri H. Wendl. & Drude) of Queensland are undergrowth species. Beccari (1933) noted that the genus Livistona was curiously absent from Borneo; since then, however, a representative from lowland swamp within the complex of L. saribus (Lour.) Merr., corresponding with L. hasseltii Hassk. of Java, has been found over a wide area of South Kalimantan (Indonesian Borneo) and herbarium specimens in Kew from Sandakan are apparently the same taxon. It was then most surprising to discover in the unmounted palm material at Kew a diminutive undergrowth Livistona collected by P. S. Ashton in 1959 in Brunei. This might easily have been passed over as a Licuala because of its small size were it not for the marked difference in leaf dissection between these two genera. In Livistona the lamina is partially divided up into compound or single-fold induplicate leaflets (i.e. V-shaped with margins adaxial, see Fig. Ic). The deepest splits normally extend only to about three-quarters of the radius of the lamina and are on the adaxial folds. Abaxial splitting occurs for a relatively short distance, producing cleft tips to the leaflets. In two species, Livistona loriphylla Becc. and L. decipiens Becc. from Australia, splits extend almost to the lamina base and there is a marked extension of the petiole into the lamina producing a typical 'costapalmate'
3 citations
Performance Metrics
| Year | Papers |
|---|---|
| 2013 | 1 |
| 1977 | 1 |