Show simple item record Sidlauskas, Brian
dc.coverage.spatial South America 2007-12-17T20:28:42Z 2007-12-17T20:28:42Z 2007-02
dc.identifier doi:10.5061/dryad.20
dc.identifier.citation Sidlauskas B (2007) Testing for unequal rates of morphological diversification in the absence of a detailed phylogeny: a case study from characiform fishes. Evolution 61: 299–316.
dc.description This study develops the random phylogenies rate test (RAPRATE), a likelihood method that simulates morphological evolution along randomly generated phylogenies, and uses it to determine whether a considerable difference in morphological diversity between two sister clades of South American fishes should be taken as evidence of differing rates of morphological change or lineage turnover. Despite identical ages of origin, similar species richness, and sympatric geographic distributions, the morphological and ecological diversity of the superfamily Anostomoidea exceeds that of the Curimatoidea. The test shows with 90% confidence (using variance among species as the measure of morphological diversity) or 99% confidence (using volume of occupied morphospace) that the rate of morphological change per unit time in the Anostomoidea likely exceeded that of the Curimatoidea. Variation in the rate of lineage turnover (speciation and extinction rates) is not found to affect greatly the morphological diversity of simulated clades and is not a likely explanation of the observed difference in morphological diversity in this case study. Though a 17% or greater delay in the onset of diversification in the Curimatoidea remains a possible alternative explanation of unequal morphological diversification, further simulations suggest that two clades drawn from the possible treespace of the Anostomoidea and Curimatoidea will rarely differ so greatly in the onset of diversification. Several uniquely derived morphological and ecological features of the Anostomoidea and Curimatoidea may have accelerated or decelerated their rate of morphological change, including a marked lengthening of the quadrate that may have relaxed structural constraints on the evolution of the anostomoid jaw.
dc.language.iso en_US
dc.publisher Blackwell Publishing
dc.relation.ispartofseries 61:2, 299 – 316
dc.relation.haspart doi:10.5061/dryad.20/1
dc.relation.haspart doi:10.5061/dryad.20/2
dc.relation.haspart doi:10.5061/dryad.20/3
dc.relation.isreferencedby doi:10.1111/j.1558-5646.2007.00022.x
dc.relation.isreferencedby PMID:17348941
dc.subject tempo
dc.subject disparity
dc.subject adaptive radiation
dc.subject Brownian evolution
dc.subject evolutionary rates
dc.subject mode
dc.subject freshwater fishes
dc.subject temp
dc.title Data from: Testing for unequal rates of morphological diversification in the absence of a detailed phylogeny: case study from characiform fishes
dc.type Article
dwc.ScientificName Curimatoidea
dwc.ScientificName Anostomoidea
dc.contributor.correspondingAuthor Sidlauskas, Brian
prism.publicationName Evolution
dryad.dansTransferDate 2019-05-11T02:58:23.581+0000
dryad.dansArchiveDate 2018-04-11T13:12:38.271+0000
dryad.dashTransferDate 2019-07-15T05:03:54.212+0000
dryad.dashStoredDate 2019-07-22T14:55:42.495+0000

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Title Morphospace Specimens
Downloaded 119 times
Description Species, lot numbers and numbers of specimens used to create the morphospace. Institutional abbreviations are as listed at
Download Evo_22_Table S1.doc (454.6 Kb)
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Title Relative Warps
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Description Results of a relative warps analysis done in tpsRelw using the data in The data in the Excel spreadsheet were used to prepare the morphospace figures that appear in Sidlauskas 2007. The order of taxa in the spreadsheet should match the order of taxa in the TPS file.
Download Sidlauskas 2007 Data.xls (131.5 Kb)
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Title Landmark Consensuses
Downloaded 61 times
Description Raw 2D coordinate positions representing the geometry of anatomical landmarks taken from the skulls of 151 fish species. This is a raw text file. Each entry includes the line LM=21 (indicating that there are 21 landmarks per species), a list of the 21 landmarks (X and Y coordinates), and an ID line that includes the name of the species to which the 21 landmarks _above_ the ID belong. The file is intended to be analyzed with the tpsRelw program by F. James Rohlf, which is available at
Download Sidlauskas 2007 Landmark Consensuses.tps (155.6 Kb)
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