Project 3599: C. Gueratto, A. Benedetti, R. Pinto-da-Rocha. 2021. Phylogenetic relationships of the genus Mischonyx Bertkau, 1880, with taxonomic changes and three new species description (Opiliones: Gonyleptidae). PeerJ. 9:e11682.
Specimen: Mischonyx parvus (unvouchered)
View: Live specimen frontal view

Abstract

The type species of Mischonyx Bertkau 1880, Mischonyx squalidus, was described based on a juvenile, which holotype is lost. Based on revision publications, the genus includes 11 Brazilian species.
The objectives of this research are: to propose a phylogenetic hypothesis for Mischonyx based on Total Evidence (TE), to propose taxonomic changes based on the phylogeny and analyse the phylogenetic hypothesis biogeographically as well. We studied 54 individuals, 15 of external group and 39 of internal group for seven markers (28S, 12S, 16S, COI, CAD, ITS e H3), totalizing 3742 bp. we raised 128 morphological and genitalic characters. We analysed the dataset under two optimality criteria: Maximum likelihood (ML) and Maximum parsimony (MP).
We described three new species: Mischonyx minimus sp. nov. (type locality: Petrópolis, Rio de Janeiro), Mischonyx intervalensis sp. nov. (type locality: Ribeirão Grande, São Paulo) and Mischonyx tinguaensis sp. nov (type locality: Nova Iguaçu, Rio de Janeiro). The genus Urodiabunus is considered a junior synonym of Mischonyx. Weyhia spinifrons Mello-Leitão, 1923; Weyhia clavifemur Mello-Leitão, 1927 and Geraeocormobius reitzi Vasconcelos, 2005b were transferred to Mischonyx. M. cuspidatus Roewer, 1913 is a junior synonym of M. squalidus Bertkau, 1880. By the phylogenetic hypothesis of relationship, Gonyleptes antiquus Mello-Leitão, 1934 (former Mischonyx antiquus) cannot be considered a Mischonyx species, therefore we reestablish the original combination. The new composition for Mischonyx comprises 17 species, with 7 new combinations. We discuss the transformation of character states throughout the phylogeny, the different phylogenetic hypothesis using different datasets and the congruence of evidence between the clades in the phylogenetic hypothesis with the biogeographical hypothesis on Atlantic Forest areas of endemism.


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Article DOI: 10.7717/peerj.11682

Project DOI: 10.7934/P3599, http://dx.doi.org/10.7934/P3599
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 9 Documents
  • 55 Taxa
  • 2 Specimens
  • 128 Characters
Total size of project's media files: 6.53M

Download Project SDD File
Total scored cells: 6729
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 128
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 312
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:128/0
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MorphoBank Project 3599

    Authors' Institutions

    • Universidade de Sao Paulo (USP, University of Sao Paulo)

    • Centro Universitário Metodista Izabela Hendrix



    Members

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    Caio Gueratto
    Project Administrator
    5521012800006729
    (6485, 0, 244)
    00000
    MorphoBank Curator
    0000000000
    (0, 0, 0)
    00000


    Taxonomic Overview for Matrix 'M26881' (54 Taxa)

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    [1] Promitobates ornatus 0054
    Last Modified in 08/04/20
    3102102023001
    [2] Roeweria virescens 0081
    Last Modified in 08/04/20
    7105105016001
    [3] Mischonyx bresslaui 3363
    Last Modified in 08/04/20
    012412404001
    [4] Mischonyx bresslaui 2120
    Last Modified in 08/04/20
    012412404001
    [5] Mischonyx bresslaui 2809
    Last Modified in 08/04/20
    012412404001
    [6] Mischonyx bresslaui 2151
    Last Modified in 08/04/20
    012412404001
    [7] Mischonyx anomalus 2953
    Last Modified in 08/04/20
    012712701001
    [8] Mischonyx anomalus 0122
    Last Modified in 08/04/20
    012712701001
    [9] Mischonyx clavifemur 0845
    Last Modified in 08/04/20
    112612601001
    [10] Piassagera brieni 0141
    Last Modified in 08/04/20
    5105105018001
    [11] Pseudotroglus telluris 2118
    Last Modified in 08/04/20
    1117117010001
    [12] Ampheres leucopheus 0377
    Last Modified in 08/04/20
    012612602001
    [13] Gonyleptes antiquus 3707
    Last Modified in 08/04/20
    012212206001
    [14] Sodreana sodreana 0056
    Last Modified in 08/04/20
    3108108017001
    [15] Heliella singularis 1837
    Last Modified in 08/04/20
    328686010001
    [16] Gonyleptes horridus 0103
    Last Modified in 08/04/20
    012312305001
    [17] Multumbo terrenus 2136
    Last Modified in 08/04/20
    1115115012001
    [18] Multumbo dimorphicus 0069
    Last Modified in 08/04/20
    112412403001
    [19] Deltaspidium tenue
    Last Modified in 08/04/20
    33919104001
    [20] Deltaspidium orguense 0520
    Last Modified in 08/04/20
    112012007001
    [21] Deltaspidium asperum 2201
    Last Modified in 08/04/20
    012412404001
    [22] Mischonyx squalidus 0085
    Last Modified in 08/04/20
    012612602001
    [23] Mischonyx parvus 3621A
    Last Modified in 08/04/20
    012512503001
    [24] Mischonyx proletariae 2361
    Last Modified in 08/04/20
    012512503001
    [25] Mischonyx bresslaui 0111
    Last Modified in 08/04/20
    012412404001
    [26] Mischonyx poeta 3650A
    Last Modified in 08/04/20
    012512503001
    [27] Mischonyx processigerus 3648
    Last Modified in 08/04/20
    012612602001
    [28] Mischonyx arlei
    Last Modified in 08/04/20
    112412403001
    [29] Mischonyx minimus 3649
    Last Modified in 08/04/20
    012412404001
    [30] Mischonyx intervalensis 0099
    Last Modified in 08/04/20
    012712701001
    [31] Mischonyx insulanus 1455
    Last Modified in 08/04/20
    012612602001
    [32] Mischonyx insulanus 2345
    Last Modified in 08/04/20
    012512503001
    [33] Mischonyx kaisara 3575
    Last Modified in 08/04/20
    32939303001
    [34] Mischonyx insulanus 3066
    Last Modified in 08/04/20
    012612602001
    [35] Mischonyx intermedius 4116A
    Last Modified in 08/04/20
    012412404001
    [36] Mischonyx fidelis 4115A
    Last Modified in 08/04/20
    012512503001
    [37] Mischonyx scaber
    Last Modified in 08/04/20
    33939302001
    [38] Mischonyx anomalus 0693
    Last Modified in 08/04/20
    012712701001
    [39] Mischonyx clavifemur 0079
    Last Modified in 08/04/20
    112612601001
    [40] Mischonyx reitzi 0672
    Last Modified in 08/04/20
    28989802001
    [41] Gonyleptes antiquus 3708
    Last Modified in 08/04/20
    012212206001
    [42] Mischonyx squalidus 2026
    Last Modified in 08/04/20
    012612602001
    [43] Mischonyx fidelis 4115B
    Last Modified in 08/04/20
    012512503001
    [44] Mischonyx intermedius 4116B
    Last Modified in 08/04/20
    012412404001
    [45] Mischonyx intermedius 4117A
    Last Modified in 08/04/20
    012412404001
    [46] Mischonyx insulanus 0143
    Last Modified in 08/04/20
    012512503001
    [47] Mischonyx insulanus 1374
    Last Modified in 08/04/20
    012512503001
    [48] Mischonyx parvus 3621B
    Last Modified in 08/04/20
    012612602001
    [49] Mischonyx parvus 3651A
    Last Modified in 08/04/20
    012612602001
    [50] Mischonyx poeta 3650B
    Last Modified in 08/04/20
    012512503001
    [51] Mischonyx processigerus 0463
    Last Modified in 08/04/20
    012612602001
    [52] Mischonyx intervalensis 3709
    Last Modified in 08/04/20
    012712701001
    [53] Mischonyx bresslaui 3375
    Last Modified in 08/04/20
    012412404001
    [54] Mischonyx anomalus 1638
    Last Modified in 08/04/20
    012712701001


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    Project overview160
    Matrix views108Matrix landing page (86 views); Morphological Matrix (22 views);
    Documents list85
    Bibliography52
    Views for media list93
    Specimen list170
    Taxon list452
    Media views275Media search (236 views); M821728 (39 views);




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