Plant Ecology and Evolution 152(2): 131-141, doi: 10.5091/plecevo.2019.1612
Rampant homoplasy and adaptive radiation in pennate diatoms
expand article infoPatrick Kociolek, David M. Williams§, Joshua Stepanek|, Qi Liu, Yan Liu#, Qingmin You¤, Balasubramanian Karthick«, Maxim Kulikovskiy»
‡ University of Colorado, Boulder; University of Colorado Museum of Natural History, Boulder, United States of America§ Department of Life Sciences, the Natural History Museum, Cromwell Road, London, SW7 5BD, United Kingdom| Department of Biology, St. Cloud State University, St. Cloud, MN 56301, United States of America¶ School of Life Science, Shanxi University, Taiyuan 030006, China# College of Life Science and Technology, Harbin Normal University, Harbin, 150025, China¤ College of Life and Environmental Sciences, Shanghai Normal University, Shanghai, China« Biodiversity and Palaeobiology Group, Agharkar Research Institute, GG Agarkar Road, Pune – 411004, Maharashtra, India» Institute of Plant Physiologyn Academy of Sciences, 127276, Moscow, Russia
Open Access

Background and aims – We examine the possibility of the independent evolution of the same features multiple times across the pennate diatom tree of life.

Methods and key results – Features we have studied include symmetry, raphe number and amphoroid symmetry. Phylogenetic analysis, with both morphological and molecular data suggest in each of these cases that the features evolved from 5 to 6 times independently. We also look at the possibility of certain features having evolved once and diagnosing large genera of diatoms, suggestive of an adaptive radiation in genera such as Mastogloia, Diploneis and Stauroneis.

Conclusion – Formal phylogenetic analyses and recognition of monophyletic groups allow for the recognition of homoplasious or homologous features.

diatoms, homoplasy, phylogeny, characters, monophyly, molecular data, morphological data, species flocks


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