BIOGEOGRAPHIC ROOTS

Biogeographic distributions of neotropical trees

Introducing the biogeographic species pool

D. W. Carstensen ([email protected]), Depto de Botânica, Laboratório de Fenologia, Plant Phenology and Seed Dispersal Group, Inst. de Biociências, Univ. Estadual Paulista (UNESP), Avenida 24-A no. 1515, 13506-900 Rio Claro, São Paulo, Brazil. – J.-P. Lessard, B. G. Holt, M. Krabbe Borregaard and C. Rahbek, Center for Macroecology, Evolution and Climate, Dept of Biology, Univ. of Copen...

Phylogenetic and Biogeographic Analysis of Deiphonine Trilobites

Cladistic parsimony analysis of the subfamily Deiphoninae Raymond, 1913 was conducted to produce a hypothesis of relationship for the group. The genera Deiphon Barrande, 1850 and Onycopyge Woodward, 1880 are found to be monophyletic, while the genus Sphaerocoryphe Angelin, 1854, as it was previously defined, is paraphyletic. A modified Brooks Parsimony Analysis using the phylogenetic hypothesis...

Global biogeographic patterns in bipolar moss species

A bipolar disjunction is an extreme, yet common, biogeographic pattern in non-vascular plants, yet its underlying mechanisms (vicariance or long-distance dispersal), origin and timing remain poorly understood. Here, combining a large-scale population dataset and multiple dating analyses, we examine the biogeography of four bipolar Polytrichales mosses, common to the Holarctic (temperate and pol...

Biogeographic evolution of Madagascar's microendemic biota.

The endemic species richness on Madagascar, relative to landmass area, is unparalleled in the world. Many organisms on the island have restricted geographical ranges. A comprehensive hypothesis explaining the evolution of this microendemism has yet to be developed. Using an analysis of watersheds in the context of Quaternary climatic shifts, we provide a new mechanistic model to explain the pro...