Project 780: J. C. Lamsdell, P. A. Selden. 2013. Babes in the wood – a unique window into sea scorpion ontogeny. BMC Evolutionary Biology. 13 (98):1-46.
Specimen: Strobilopterus proteus (FMNH:PE 61197)

Abstract

Background:
Few studies on eurypterids have taken into account morphological changes that occur throughout postembryonic development. Here two species of eurypterid are described from the Pragian Beartooth Butte Formation of Cottonwood Canyon in Wyoming and included in a phylogenetic analysis. Both species comprise individuals from a number of instars, and this allows for changes that occur throughout their ontogeny to be documented, and how ontogenetically variable characters can influence phylogenetic analysis to be tested.

Results:
The two species of eurypterid are described as Jaekelopterus howelli
(Kjellesvig-Waering and Størmer, 1952) and Strobilopterus proteus sp. nov. Phylogenetic analysis places them within the Pterygotidae and Strobilopteridae respectively, both families within the Eurypterina. Jaekelopterus howelli shows positive allometry of the cheliceral denticles throughout ontogeny, while a number of characteristics including prosomal appendage length, carapace shape, lateral eye position, and relative breadth all vary during the growth of Strobilopterus proteus.

Conclusions:
The ontogeny of Strobilopterus proteus shares much in common with that of modern xiphosurans,however certain characteristics including apparent true direct development suggest a closer affinity to arachnids. The ontogenetic development of the genital appendage also supports the hypothesis that the structure is homologous to the endopods of the trunk limbs of other arthropods. Including earlier instars in the phylogenetic analysis is shown to destabilise the retrieved topology. Therefore, coding juveniles as individual taxa in an analysis is shown to be actively detrimental and alternative ways of coding ontogenetic data into phylogenetic analyses should be explored.



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Project DOI: 10.7934/P780, http://dx.doi.org/10.7934/P780
This project containsMatrices
  • 1 Media
  • 2 Matrices
  • 72 Taxa
  • 1 Specimen
  • 136 Characters
Total size of project's media files: 60 MB

Download Project SDD File
Total scored cells: 9882
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 208
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 318
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:208/0
Currently Viewing:
MorphoBank Project 780


    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
    rules
    James Lamsdell
    Project Administrator
    Last logged in 06/07/13
    7211208009882
    (9287, 0, 595)
    000


    Taxonomic Overview for Matrix 'M1783' (63 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
    support
    NPA
    cells
    "-" cellscell images labels on
    cell images
    member
    access
    [1] Weinbergina opitzi
    Last Modified in 12/05/13
    18282021001
    [2] Chasmataspis laurencii
    Last Modified in 12/05/13
    345858012001
    [3] Octoberaspis ushakovi
    Last Modified in 12/05/13
    23727209001
    [4] Diploaspis casteri
    Last Modified in 12/05/13
    31666607001
    [5] Loganamaraspis dunlopi
    Last Modified in 12/05/13
    36595909001
    [6] Brachyopterus stubblefieldi
    Last Modified in 12/05/13
    24717109001
    [7] Rhenopterus diensti
    Last Modified in 12/05/13
    2939309001
    [8] Parastylonurus ornatus
    Last Modified in 12/05/13
    1959508001
    [9] Laurieipterus elegans
    Last Modified in 12/05/13
    43565605001
    [10] Kokomopterus longicaudatus
    Last Modified in 12/05/13
    19797906001
    [11] Hardieopteurs macrophthalmus
    Last Modified in 12/05/13
    18787808001
    [12] Drepanopterus pentlandicus
    Last Modified in 12/05/13
    2969507001
    [13] Hibbertopterus scouleri
    Last Modified in 12/05/13
    18807907001
    [14] Megarachne servinei
    Last Modified in 12/05/13
    73302902001
    [15] Stoermeropterus conicus
    Last Modified in 12/05/13
    01009905001
    [16] Stoermeropterus latus
    Last Modified in 12/05/13
    19808005001
    [17] Stoermeropterus nodosus
    Last Modified in 12/05/13
    46565602001
    [18] Vinetopterus struvei
    Last Modified in 12/05/13
    6939305001
    [19] Vinetopterus martini
    Last Modified in 12/05/13
    29727203001
    [20] Moselopterus ancylotelson
    Last Modified in 12/05/13
    1989805001
    [21] Moselopterus elongatus
    Last Modified in 12/05/13
    7929205001
    [22] Onychopterella augusti
    Last Modified in 12/05/13
    26747404001
    [23] Onychopterella kokomoensis
    Last Modified in 12/05/13
    6929206001
    [24] Dolichopterus macrocheirus
    Last Modified in 12/05/13
    1999904001
    [25] Eurypterus remipes
    Last Modified in 12/05/13
    010010004001
    [26] Hughmilleria socialis
    Last Modified in 12/05/13
    2969606001
    [27] Tylopterella boylei
    Last Modified in 12/05/13
    61414102001
    [28] Megalograptus ohioensis
    Last Modified in 12/05/13
    0959509001
    [29] Mixopterus kiaeri
    Last Modified in 12/05/13
    4959505001
    [30] Strobilopterus laticeps
    Last Modified in 12/05/13
    52505002001
    [31] Strobilopterus princetonii
    Last Modified in 12/05/13
    19838302001
    [32] Strobilopterus proteus
    Last Modified in 12/05/13
    17878700001
    [33] Buffalopterus pustulosus
    Last Modified in 12/05/13
    45575702001
    [34] Strobilopterus richardsoni
    Last Modified in 12/05/13
    66373701001
    [35] Erieopterus microphthalmus
    Last Modified in 12/05/13
    2989804001
    [36] Paraeurypterus anatoliensis
    Last Modified in 12/05/13
    62424200001
    [37] Pentlandopterus minor
    Last Modified in 12/05/13
    55484801001
    [38] Dolichopterus jewetti
    Last Modified in 12/05/13
    5959504001
    [39] Ruedemannipterus stylonuroides
    Last Modified in 12/05/13
    60434301001
    [40] Clarkeipterus testudineus
    Last Modified in 12/05/13
    68353501001
    [41] Clarkeipterus otisius
    Last Modified in 12/05/13
    89141401001
    [42] Erieopterus eriensis
    Last Modified in 12/05/13
    23808001001
    [43] Eurypterus henkeni
    Last Modified in 12/05/13
    18848402001
    [44] Eurypterus tetragonophthalmus
    Last Modified in 12/05/13
    010010004001
    [45] Eurypterus leopoldi
    Last Modified in 12/05/13
    49545401001
    [46] Eurypterus pittsfordensis
    Last Modified in 12/05/13
    13888803001
    [47] Eurypterus henningsmoeni
    Last Modified in 12/05/13
    22808002001
    [48] Orcanopterus manitoulinensis
    Last Modified in 12/05/13
    17828205001
    [49] Pterygotus anglicus
    Last Modified in 12/05/13
    2959507001
    [50] Adelophthalmus sievertsi
    Last Modified in 12/05/13
    1949409001
    [51] Eurypterus dekayi
    Last Modified in 12/05/13
    2989804001
    [52] Carcinosoma newlini
    Last Modified in 12/05/13
    4949406001
    [53] Slimonia acuminata
    Last Modified in 12/05/13
    4959505001
    [54] Acutiramus bohemicus
    Last Modified in 12/05/13
    64363604001
    [55] Acutiramus macrophthalmus
    Last Modified in 12/05/13
    2959507001
    [56] Erettopterus bilobus
    Last Modified in 12/05/13
    4939307001
    [57] Erettopterus osiliensis
    Last Modified in 12/05/13
    10878707001
    [58] Erettopterus serricaudatus
    Last Modified in 12/05/13
    81232300001
    [59] Erettopterus waylandsmithi
    Last Modified in 12/05/13
    78252501001
    [60] Jaekelopterus rhenaniae
    Last Modified in 12/05/13
    23747407001
    [61] Jaekelopterus howelli
    Last Modified in 12/05/13
    50525202001
    [62] Ciurcopterus ventricosus
    Last Modified in 12/05/13
    26757503001
    [63] Nanahughmilleria norvegica
    Last Modified in 12/05/13
    16868602001


    Taxonomic Overview for Matrix 'M1911' (66 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
    support
    NPA
    cells
    "-" cellscell images labels on
    cell images
    member
    access
    [1] Weinbergina opitzi
    Last Modified in 12/05/13
    67777021001
    [2] Chasmataspis laurencii
    Last Modified in 12/05/13
    365656012001
    [3] Octoberaspis ushakovi
    Last Modified in 12/05/13
    26696909001
    [4] Diploaspis casteri
    Last Modified in 12/05/13
    32656507001
    [5] Loganamaraspis dunlopi
    Last Modified in 12/05/13
    40555509001
    [6] Brachyopterus stubblefieldi
    Last Modified in 12/05/13
    26696909001
    [7] Rhenopterus diensti
    Last Modified in 12/05/13
    6898909001
    [8] Parastylonurus ornatus
    Last Modified in 12/05/13
    8888808001
    [9] Laurieipterus elegans
    Last Modified in 12/05/13
    47525205001
    [10] Kokomopterus longicaudatus
    Last Modified in 12/05/13
    23757506001
    [11] Hardieopteurs macrophthalmus
    Last Modified in 12/05/13
    23737308001
    [12] Drepanopterus pentlandicus
    Last Modified in 12/05/13
    8908907001
    [13] Hibbertopterus scouleri
    Last Modified in 12/05/13
    23757407001
    [14] Megarachne servinei
    Last Modified in 12/05/13
    75282702001
    [15] Stoermeropterus conicus
    Last Modified in 12/05/13
    6949305001
    [16] Stoermeropterus latus
    Last Modified in 12/05/13
    22777705001
    [17] Stoermeropterus nodosus
    Last Modified in 12/05/13
    48545402001
    [18] Vinetopterus struvei
    Last Modified in 12/05/13
    12878705001
    [19] Vinetopterus martini
    Last Modified in 12/05/13
    32696903001
    [20] Moselopterus ancylotelson
    Last Modified in 12/05/13
    7929205001
    [21] Moselopterus elongatus
    Last Modified in 12/05/13
    13868605001
    [22] Onychopterella augusti
    Last Modified in 12/05/13
    29717104001
    [23] Onychopterella kokomoensis
    Last Modified in 12/05/13
    11878706001
    [24] Dolichopterus macrocheirus
    Last Modified in 12/05/13
    8929204001
    [25] Eurypterus remipes
    Last Modified in 12/05/13
    6949404001
    [26] Hughmilleria socialis
    Last Modified in 12/05/13
    7919106001
    [27] Tylopterella boylei
    Last Modified in 12/05/13
    62404002001
    [28] Megalograptus ohioensis
    Last Modified in 12/05/13
    6898909001
    [29] Mixopterus kiaeri
    Last Modified in 12/05/13
    7929205001
    [30] Strobilopterus laticeps
    Last Modified in 12/05/13
    56464602001
    [31] Strobilopterus princetonii g
    Last Modified in 12/05/13
    44606000001
    [32] Strobilopterus princetonii
    Last Modified in 12/05/13
    24787802001
    [33] Strobilopterus richardsoni
    Last Modified in 12/05/13
    68353501001
    [34] Strobilopterus proteus
    Last Modified in 12/05/13
    24808000001
    [35] Strobilopterus proteus b
    Last Modified in 12/05/13
    52525200001
    [36] Strobilopterus proteus a
    Last Modified in 12/05/13
    42616101001
    [37] Buffalopterus pustulosus
    Last Modified in 12/05/13
    48545402001
    [38] Erieopterus microphthalmus
    Last Modified in 12/05/13
    9919104001
    [39] Paraeurypterus anatoliensis
    Last Modified in 12/05/13
    62424200001
    [40] Pentlandopterus minor
    Last Modified in 12/05/13
    55484801001
    [41] Dolichopterus jewetti
    Last Modified in 12/05/13
    10909004001
    [42] Ruedemannipterus stylonuroides
    Last Modified in 12/05/13
    61424201001
    [43] Clarkeipterus testudineus
    Last Modified in 12/05/13
    68353501001
    [44] Clarkeipterus otisius
    Last Modified in 12/05/13
    89141401001
    [45] Erieopterus eriensis
    Last Modified in 12/05/13
    28757501001
    [46] Eurypterus henkeni
    Last Modified in 12/05/13
    21818102001
    [47] Eurypterus tetragonophthalmus
    Last Modified in 12/05/13
    6949404001
    [48] Eurypterus leopoldi
    Last Modified in 12/05/13
    49545401001
    [49] Eurypterus pittsfordensis
    Last Modified in 12/05/13
    18838303001
    [50] Eurypterus henningsmoeni
    Last Modified in 12/05/13
    27757502001
    [51] Orcanopterus manitoulinensis
    Last Modified in 12/05/13
    20797905001
    [52] Pterygotus anglicus
    Last Modified in 12/05/13
    7909007001
    [53] Adelophthalmus sievertsi
    Last Modified in 12/05/13
    5909009001
    [54] Eurypterus dekayi
    Last Modified in 12/05/13
    8929204001
    [55] Carcinosoma newlini
    Last Modified in 12/05/13
    7919106001
    [56] Slimonia acuminata
    Last Modified in 12/05/13
    9909005001
    [57] Acutiramus bohemicus
    Last Modified in 12/05/13
    67333304001
    [58] Acutiramus macrophthalmus
    Last Modified in 12/05/13
    9888807001
    [59] Erettopterus bilobus
    Last Modified in 12/05/13
    8898907001
    [60] Erettopterus osiliensis
    Last Modified in 12/05/13
    13848407001
    [61] Erettopterus serricaudatus
    Last Modified in 12/05/13
    82222200001
    [62] Erettopterus waylandsmithi
    Last Modified in 12/05/13
    79242401001
    [63] Jaekelopterus rhenaniae
    Last Modified in 12/05/13
    28696907001
    [64] Jaekelopterus howelli
    Last Modified in 12/05/13
    54484802001
    [65] Ciurcopterus ventricosus
    Last Modified in 12/05/13
    28737303001
    [66] Nanahughmilleria norvegica
    Last Modified in 12/05/13
    20828202001


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    Project overview3186
    Specimen list1868
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    Media views4470Media search (3946 views); M149667 (524 views);
    Taxon list10123
    Documents list1




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