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. 2012 Mar;61(2):204–213. doi: 10.1093/sysbio/syr091

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© The Author(s) 2011. Published by Oxford University Press, on behalf of the Society of Systematic Biologists. All rights reserved.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 2. — Expected LTT plot for the protracted pure birth model (i.e., no extinction) for various values of the speciation completion rate λ₂. The value of the speciation initiation rate λ₁ is 0.5. The curve for λ₂ = ∞ is barely visible, as it almost coincides with the curve for λ₂ = 10.