Comments on the Manhattan Stratigraphic Measure

  • Pol D
  • Norell M
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Abstract

The Manhattan stratigraphic measure was proposed as a measure of congruence between temporal information retrieved from the fossil record and a phylogenetic hypothesis. This index is based on the fit of a Sankoff character representing the stratigraphic ages of terminal taxa and is calculated in a way analogous to the consistency index. Sample cases are analyzed in which this measure is insensitive to increasing amounts of conflict between stratigraphic and topological temporal information. A simple modification of the step matrix upon which the measure is based is proposed. The modified index, MSM*, overcomes the observed problem and is based on the measurement of the number and extent of ghost lineages.

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Pol, D., & Norell, M. A. (2001). Comments on the Manhattan Stratigraphic Measure. Cladistics, 17(3), 285–289. https://doi.org/10.1111/j.1096-0031.2001.tb00125.x

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