Project 423: G. Giribet,G. D. Edgecombe,W. C. Wheeler,C. Babbitt. 2002. Phylogeny and Systematic Position of Opiliones: A Combined Analysis of Chelicerate Relationships Using Morphological and Molecular Data. Cladistics. 18 (1):5-70.
Specimen: Nuncia sp. (unvouchered)

Abstract

The ordinal level phylogeny of the Arachnida and the suprafamilial level phylogeny of the Opiliones were studied on the basis of a combined analysis of 253 morphological characters, the complete sequence of the 18S rRNA gene, and the D3 region of the 28S rRNA gene. Molecular data were collected for 63 terminal taxa. Morphological data were collected for 35 exemplar taxa of Opiliones, but groundplans were applied to some of the remaining chelicerate groups. Six extinct terminals, including Paleozoic scorpions, are scored for morphological characters. The data were analyzed using strict parsimony for the morphological data matrix and via direct optimization for the molecular and combined data matrices. A sensitivity analysis of 15 parameter sets was undertaken, and character congruence was used as the optimality criterion to choose among competing hypotheses. The results obtained are unstable for the high-level chelicerate relationships (except for Tetrapulmonata, Pedipalpi, and Camarostomata), and the sister group of the Opiliones is not clearly established, although the monophyly of Dromopoda is supported under many parameter sets. However, the internal phylogeny of the Opiliones is robust to parameter choice and allows the discarding of previous hypotheses of opilionid phylogeny such as the “Cyphopalpatores” or “Palpatores.” The topology obtained is congruent with the previous hypothesis of “Palpatores” paraphyly as follows: (Cyphophthalmi (Eupnoi (Dyspnoi + Laniatores))). Resolution within the Eupnoi, Dyspnoi, and Laniatores (the latter two united as Dyspnolaniatores nov.) is also stable to the superfamily level, permitting a new classification system for the Opiliones.


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Project DOI: 10.7934/P423, http://dx.doi.org/10.7934/P423
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 1 Document
  • 61 Taxa
  • 1 Specimen
  • 253 Characters
Total size of project's media files: 1 MB

Download Project SDD File
Total scored cells: 12393
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 253
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 540
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:253/0
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MorphoBank Project 423


    Members

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    MorphoBank Curator
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    Last logged in 03/24/12
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    Maureen Admin
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    Gonzalo Giribet
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    Gonzalo Giribet
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    Taxonomic Overview for Matrix 'M983' (60 Taxa)

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    [1] Trilobita
    Last Modified in 12/05/13
    1115757085004
    [2] Palaeoisopus
    Last Modified in 12/05/13
    1365757060004
    [3] Pycnogonida
    Last Modified in 12/05/13
    71109109073004
    [4] Eurypterida
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    1109696047004
    [5] Limulus
    Last Modified in 12/05/13
    42161161050004
    [6] Carcinoscorpius
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    44159159050004
    [7] Palaeophonidae
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    1268080047004
    [8] Proscorpius
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    1228484047004
    [9] Androctonus
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    32176176045004
    [10] Belisarius
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    38166166049004
    [11] Siro
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    33191191029004
    [12] Parasiro
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    [13] Stylocellus
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    [14] StylocellusJP
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    [15] Dalquestia
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    48186186019004
    [16] Odiellus
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    35196196022004
    [17] Phalangium
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    34197197022004
    [18] Opilio
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    [19] Astrobunus
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    [20] Nelima
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    [21] Leiobunum
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    [22] Hadrobunus
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    [23] Caddo
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    [24] Ischyropsalis
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    [25] Hesperonemastoma
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    [26] Ceratolasma
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    [27] Sabacon
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    [28] Taracus
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    [29] Dicranolasma
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    [30] Centetostoma
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    [31] Ortholasma
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    [32] Nemastoma
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    [33] Nipponopsalis
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    [34] Trogulus
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    [35] Equitius
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    [36] Triaenobunus
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    [37] Zuma
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    [38] Oncopus
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    [39] Gnomulus
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    [40] Scotolemon
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    [41] Maiorerus
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    [42] Bishopella
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    [43] Gnidia
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    [44] Pachyloides
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    [45] Hoplobunus
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    [46] Solifugae
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    34157157062004
    [47] Palpigradi
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    [48] Liphistius
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    [49] Aphonopelma
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    [50] Nesticus
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    [51] Amblypygi
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    [52] Mastigoproctus
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    [53] Schizomida
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    [54] Ricinulei
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    [55] Pseudoscorpiones
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    [56] Allonothrus
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    [57] Acarus
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    [58] Opilioacarus
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    [59] Rhipicephalus
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    44148148061004
    [60] Trigonotarbida
    Last Modified in 12/05/13
    106104104043004


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