Project 2792: D. Huang, G. Hormiga, F. Xia, C. Cai, Z. Yin, Y. Su, G. Giribet. 2018. Origin of spiders and their spinning organs illuminated by mid-Cretaceous amber fossils. Nature Ecology & Evolution. 2:1-34.
Specimen: † Chimerarachne yingi (:NIGP167161)
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Abstract

Understanding the genealogical relationships among the arachnid orders is an onerous task, but fossils have aided in anchoring some branches of the arachnid tree of life. The discovery of Palaeozoic fossils with characters found in both extant spiders and other arachnids provided evidence for a series of extinctions of what was thought to be a grade, Uraraneida, that led to modern spiders. Here, we report two extraordinarily well-preserved Mesozoic members of Uraraneida with a segmented abdomen, multi-articulate spinnerets with well-defined spigots, modified male palps, spider-like chelicerae and a uropygid-like telson. The new fossils, belonging to the species Chimerarachne yingi, were analysed phylogenetically in a large data matrix of extant and extinct arachnids under a diverse regime of analytical conditions, most of which resulted in placing Uraraneida as the sister clade of Araneae (spiders). The phylogenetic placement of this arachnid fossil extends the presence of spinnerets and modified palps more basally in the arachnid tree than was previously thought. Ecologically, the new fossil extends the record of Uraraneida 170 million years towards the present, thus showing that uraraneids and spiders co-existed for a large fraction of their evolutionary history.


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Article DOI: 10.1038/s41559-018-0475-9

Project DOI: 10.7934/P2792, http://dx.doi.org/10.7934/P2792
This project containsMatrices
  • 34 Media
  • 1 Matrix
  • 93 Taxa
  • 6 Specimens
  • 230 Characters
Total size of project's media files: 79 MB

Download Project SDD File
Total scored cells: 17095
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 230
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 521
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:230/0
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MorphoBank Project 2792

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    Members

    member name taxa specimens media media
    notes
    chars character
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    notes  media
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    (scored, NPA, "-")
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    rules
    Gonzalo Giribet
    Project Administrator
    Last logged in 02/12/18
    935343230070017095
    (14294, 0, 2801)
    00000
    Gustavo Hormiga
    Full membership
    Last logged in 12/08/17
    0000000000
    (0, 0, 0)
    00000


    Taxonomic Overview for Matrix 'M24911' (93 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
    support
    NPA
    cells
    "-" cellscell images labels on
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    access
    [1] † Emeraldella
    Last Modified in 02/12/18
    1067878046002
    [2] † Alalcomenaeus
    Last Modified in 02/12/18
    1088383039002
    [3] † Leanchoilia
    Last Modified in 02/12/18
    1187474038002
    [4] Achelia
    Last Modified in 12/06/17
    26127126078002
    [5] Callipallene
    Last Modified in 12/06/17
    26127126078002
    [6] Endeis
    Last Modified in 12/06/17
    26125124080002
    [7] Colossendeis
    Last Modified in 12/06/17
    26126125079002
    [8] † Haliestes
    Last Modified in 02/12/18
    798483068002
    [9] † Palaeoisopus
    Last Modified in 02/12/18
    1009291039002
    [10] Limulus
    Last Modified in 12/06/17
    2197197031002
    [11] † Carcinoscorpius
    Last Modified in 02/12/18
    3196196031002
    [12] † Dibasterium
    Last Modified in 02/12/18
    1119292027002
    [13] † Offacolus
    Last Modified in 02/12/18
    1139090027002
    [14] † Weinbergina
    Last Modified in 02/12/18
    1179393020002
    [15] † Uraraneida
    Last Modified in 02/12/18
    1348383013002
    [16] † Attercopus fimbriunguis
    Last Modified in 12/06/17
    215131302002
    [17] † Permarachne novokshonovi
    Last Modified in 12/06/17
    203262601002
    [18] † Chimerarachne yingi
    Last Modified in 12/06/17
    1219898011002
    [19] † Idmonarachne
    Last Modified in 02/12/18
    1239090017002
    [20] Liphistius
    Last Modified in 12/06/17
    0208208022002
    [21] Atypoides
    Last Modified in 12/06/17
    1208208021002
    [22] Aphonopelma
    Last Modified in 12/06/17
    0209209021002
    [23] Nesticus
    Last Modified in 12/06/17
    1209208021002
    [24] Tetragnathidae
    Last Modified in 12/06/17
    1209208021002
    [25] Corinnidae
    Last Modified in 12/06/17
    1209208021002
    [26] Pholcidae
    Last Modified in 12/06/17
    1209208021002
    [27] † Lyssomanes
    Last Modified in 02/12/18
    1209208021002
    [28] † Parastylonurus
    Last Modified in 02/12/18
    93115115022002
    [29] † Mixopterus
    Last Modified in 02/12/18
    93115115022002
    [30] † Eurypterus
    Last Modified in 02/12/18
    90118118022002
    [31] † Chasmataspis
    Last Modified in 02/12/18
    1615656013002
    [32] † Octoberaspis
    Last Modified in 02/12/18
    1645454012002
    [33] † Waeringoscorpio
    Last Modified in 02/12/18
    1407878012002
    [34] † Pulmonoscorpius
    Last Modified in 02/12/18
    104109109017002
    [35] † Palaeoscorpius
    Last Modified in 02/12/18
    1308888012002
    [36] Compsoscorpius
    Last Modified in 02/12/18
    1199898013002
    [37] † Proscorpius
    Last Modified in 02/12/18
    1179898015002
    [38] Pandinus
    Last Modified in 12/06/17
    3207207020002
    [39] Belisarius
    Last Modified in 12/06/17
    3207207020002
    [40] Androctonus
    Last Modified in 12/06/17
    3207207020002
    [41] Pseudocellus
    Last Modified in 12/06/17
    5192191034002
    [42] Ricinoides
    Last Modified in 12/06/17
    5192191034002
    [43] † Palaeocharinus
    Last Modified in 02/12/18
    82127127021002
    [44] † Anthracomartus
    Last Modified in 02/12/18
    1189292020002
    [45] Eophrynus
    Last Modified in 12/06/17
    1278080023002
    [46] † Plesiosiro
    Last Modified in 02/12/18
    1248888018002
    [47] Trithyreus
    Last Modified in 12/06/17
    6202201023002
    [48] Stenochrus
    Last Modified in 12/06/17
    2206205023002
    [49] Mastigoproctus
    Last Modified in 12/06/17
    1212211018002
    [50] Paraphrynus
    Last Modified in 12/06/17
    1215215014002
    [51] Charon
    Last Modified in 12/06/17
    1215215014002
    [52] † Musicodamon
    Last Modified in 02/12/18
    1215215014002
    [53] Charinus
    Last Modified in 12/06/17
    3213213014002
    [54] † Paracharon
    Last Modified in 02/12/18
    5210210015002
    [55] † Stygophrynus
    Last Modified in 02/12/18
    3213213014002
    [56] † Graeophonus
    Last Modified in 02/12/18
    1328787011002
    [57] † Paracharonopsis
    Last Modified in 02/12/18
    11710510508002
    [58] † Kronocharon
    Last Modified in 02/12/18
    11810410408002
    [59] Eukoenenia b
    Last Modified in 12/06/17
    8186185037002
    [60] Eukoenenia a
    Last Modified in 12/06/17
    8186185037002
    [61] † Eophalangium
    Last Modified in 02/12/18
    1337574023002
    [62] † Hastocularis
    Last Modified in 02/12/18
    1229190018002
    [63] Siro
    Last Modified in 12/06/17
    4192191035002
    [64] Stylocellus
    Last Modified in 12/06/17
    5193192033002
    [65] Sabacon
    Last Modified in 12/06/17
    3192190037002
    [66] Nemastoma
    Last Modified in 12/06/17
    3192190037002
    [67] Odiellus
    Last Modified in 12/06/17
    3192190037002
    [68] Leiobunum
    Last Modified in 12/06/17
    3192190037002
    [69] Caddo
    Last Modified in 12/06/17
    3192190037002
    [70] Pachyloides
    Last Modified in 12/06/17
    3192190037002
    [71] Zuma
    Last Modified in 12/06/17
    3192190037002
    [72] Chthonius
    Last Modified in 12/06/17
    5193191034002
    [73] Pseudogarypus
    Last Modified in 12/06/17
    4192191035002
    [74] Neobisium
    Last Modified in 12/06/17
    4193192034002
    [75] Anagarypus
    Last Modified in 12/06/17
    4193192034002
    [76] Americhernes
    Last Modified in 12/06/17
    4193192034002
    [77] Allothyrus
    Last Modified in 12/06/17
    14175175041002
    [78] Opilioacarus
    Last Modified in 12/06/17
    11179179040002
    [79] Amblyomma
    Last Modified in 12/06/17
    7182182041002
    [80] Chanbria
    Last Modified in 12/06/17
    2176175053002
    [81] Gluvia
    Last Modified in 12/06/17
    2176175053002
    [82] Eusimonia
    Last Modified in 12/06/17
    2176175053002
    [83] Eremobates
    Last Modified in 12/06/17
    2176175053002
    [84] † Alicorhagidia
    Last Modified in 02/12/18
    14172172044002
    [85] † Palaeacarus
    Last Modified in 02/12/18
    15175175040002
    [86] † Microcaeculus
    Last Modified in 02/12/18
    14177177039002
    [87] Limnesia
    Last Modified in 02/12/18
    14175175041002
    [88] Leptus
    Last Modified in 02/12/18
    15174174041002
    [89] † Sancassania
    Last Modified in 02/12/18
    13171171046002
    [90] Anystis
    Last Modified in 02/12/18
    15176176039002
    [91] † Labidostomma
    Last Modified in 02/12/18
    16174174040002
    [92] † Eupodes
    Last Modified in 02/12/18
    15174174041002
    [93] Tetranychus
    Last Modified in 12/06/17
    14173173043002


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    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project39
    Project downloads33
    Matrix downloads5Chimerarachne matrix (5 downloads);
    Media downloads1M466396 (1 download);