Project 3189: M. J. Hopkins,K. St. John. 2018. A new family of dissimilarity metrics for discrete character matrices that include inapplicable characters and its importance for disparity studies. Proceedings of the Royal Society B: Biological Sciences. 285 (1892):none yet.
Specimen: Scutigerella sp. (unvouchered)
View: dorsal

Abstract

The use of discrete character data for disparity analyses has become more popular, partially due to the recognition that character data describe variation at large taxonomic scales, as well as the increasing availability of both character matrices co-opted from phylogenetic analysis and software tools. As taxonomic scope increases, the need to describe variation leads to some characters that may describe traits not found across all the taxa. In such situations, it is common practice to treat inapplicable characters as missing data when calculating dissimilarity matrices for disparity studies. For commonly used dissimilarity metrics like Wills's GED and Gower's coefficient, this can lead to the reranking of pairwise dissimilarities, resulting in taxa that share more primary character states being assigned larger dissimilarity values than taxa that share fewer. We introduce a family of metrics that proportionally weight primary characters according to the secondary characters that describe them, effectively eliminating this problem, and compare their performance to common dissimilarity metrics and previously proposed weighting schemes. When applied to empirical datasets, we confirm that choice of dissimilarity metric frequently affects the rank order of pairwise distances, differentially influencing downstream macroevolutionary inferences.


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Article DOI: 10.1098/rspb.2018.1784

Project DOI: 10.7934/P3189, http://dx.doi.org/10.7934/P3189
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 47 Taxa
  • 1 Specimen
  • 211 Characters


Download Project SDD File
Total scored cells: 7630
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 211
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 479
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:206/5
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MorphoBank Project 3189


    Members

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    Melanie Hopkins
    Project Administrator
    Last logged in 12/06/18
    4711211092007630
    (6204, 0, 1426)
    07000


    Taxonomic Overview for Matrix 'M25496' (47 Taxa)

    taxon unscored
    cells
    scored
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    NPA
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    "-" cellscell images labels on
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    [1] Eudigraphis taiwanensis
    Last Modified in 06/14/18
    42119119050001
    [2] Glomeris marginata
    Last Modified in 06/14/18
    34127127050001
    [3] Cyliosoma sp.
    Last Modified in 06/14/18
    44119119048001
    [4] Glomeridesmus sp.
    Last Modified in 06/14/18
    54105105052001
    [5] † Cowiedesmus eroticopodus
    Last Modified in 12/06/18
    1742626011001
    [6] † Archidesmus macnicoli
    Last Modified in 12/06/18
    1374141033001
    [7] Petaserpes sp.
    Last Modified in 06/14/18
    68102102041001
    [8] Brachycybe lecontii
    Last Modified in 06/14/18
    57108108046001
    [9] Pseudopolydesmus sp.
    Last Modified in 06/14/18
    37122122052001
    [10] Prostemmiulus sp.
    Last Modified in 06/14/18
    60109109042001
    [11] Abacion magnum
    Last Modified in 06/14/18
    63107107041001
    [12] Cleidogona sp.
    Last Modified in 06/14/18
    61109109041001
    [13] † Gaspestria genselorum
    Last Modified in 12/06/18
    1642424023001
    [14] Narceus americanus
    Last Modified in 06/14/18
    38126126047001
    [15] Cambala annulata
    Last Modified in 06/14/18
    69104104038001
    [16] Cylindroiulus sp.
    Last Modified in 06/14/18
    40124124047001
    [17] † Crussolum spp.
    Last Modified in 12/06/18
    193181800001
    [18] Scutigerina weberi
    Last Modified in 06/14/18
    28163163020001
    [19] Sphendononema guildingii
    Last Modified in 06/14/18
    28163163020001
    [20] Scutigera coleoptrata
    Last Modified in 06/14/18
    0185185026001
    [21] Lithobius forficatus
    Last Modified in 06/14/18
    0187187024001
    [22] Eupolybothrus cavernicolus
    Last Modified in 06/14/18
    19167167025001
    [23] Anopsobius giribeti
    Last Modified in 06/14/18
    18168168025001
    [24] Paralamyctes validus
    Last Modified in 06/14/18
    22166166023001
    [25] † Devonobius delta
    Last Modified in 12/06/18
    1346666011001
    [26] Craterostigmus tasmanianus
    Last Modified in 06/14/18
    13173173025001
    [27] Craterostigmus crabilli
    Last Modified in 06/14/18
    45145145021001
    [28] † Mazoscolopendra richardsoni
    Last Modified in 12/06/18
    164454502001
    [29] Scolopendropsis bahiensis
    Last Modified in 06/14/18
    26164163022001
    [30] Akymnopellis chilensis
    Last Modified in 06/14/18
    23166166022001
    [31] Rhysida longipes
    Last Modified in 06/14/18
    13174174024001
    [32] Alipes grandidieri
    Last Modified in 06/14/18
    20167167024001
    [33] Cryptops hortensis
    Last Modified in 06/14/18
    8178178025001
    [34] Theatops spinicaudus
    Last Modified in 06/14/18
    17169169025001
    [35] Scolopocryptops sexspinosus
    Last Modified in 06/14/18
    17167167027001
    [36] Newportia adisi
    Last Modified in 06/14/18
    17169169025001
    [37] Mecistocephalus guildingii
    Last Modified in 06/14/18
    12169169030001
    [38] Tygarrup javanicus
    Last Modified in 06/14/18
    27155155029001
    [39] Notiphilides grandis
    Last Modified in 06/14/18
    24160160027001
    [40] Himantarium gabrielis
    Last Modified in 06/14/18
    15172172024001
    [41] Stenotaenia linearis
    Last Modified in 06/14/18
    16166166029001
    [42] Henia brevis
    Last Modified in 06/14/18
    32155154025001
    [43] Strigamia maritima
    Last Modified in 06/14/18
    3179179029001
    [44] Hydroschendyla submarina
    Last Modified in 06/14/18
    22163163026001
    [45] † Kachinophilus pereirai
    Last Modified in 12/06/18
    100100100011001
    [46] Hanseniella sp.
    Last Modified in 06/14/18
    48104104059001
    [47] Scutigerella sp.
    Last Modified in 06/14/18
    43109109059001


    Project views

    type number of views Individual items viewed (where applicable)
    Total project views362
    Project overview65
    Bibliography16
    Media views60Media search (53 views); M645535 (7 views);
    Matrix views46Matrix landing page (37 views); Ingroup (9 views);
    Views for media list18
    Specimen list28
    Taxon list129




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project11
    Project downloads5
    Matrix downloads6Ingroup (6 downloads);