Project 3211: A. López-Arbarello, T. Bürgin, H. Furrer, R. Stockar. 2019. Taxonomy and phylogeny of Eosemionotus Stolley, 1920 (Neopterygii: Ginglymodi) from the Middle Triassic of Europe. Palaeontologia electronica. 22.1.10A:1-64.
Specimen: † Eosemionotus diskosomus (MCSN:8082)
View: Complete specimen

Abstract

Over 80 years the actinopterygian genus Eosemionotus was known from a single species, E. vogeli, from the German Muschelkalk (Anisian). A second species was published in 2004, E. ceresiensis, from the upper Besano Formation (lowermost Ladinian) of Monte San Giorgio, Switzerland. New excellently preserved specimens recovered from the Cassina and Sceltrich beds (Meride Limestone; Ladinian) in this latter area, triggered a new study. Consequently, three new species are established: E. diskosomus, E. sceltrichensis, and E. minutus, including differential diagnoses for the five species, which differ in body proportions, relative position of the fins, the morphology of several skull bones, squamation pattern, and some meristic characters (e.g., number of premaxillary teeth, and branchiostegal rays). The cladistic analysis retrieved Eosemionotus as the oldest Macrosemiidae within the order Semionotiformes (Ginglymodi). The monophyly of the genus and its sister-group relationships with the other macrosemiids are among the best supported nodes with high Bremer, jackknife and bootstrap values, and numerous synapomorphies. The pattern of phylogenetic relationships between the five species of Eosemionotus indicates that the Muschelkalk species E. vogeli originated through dispersal from the Tethys into the Germanic Basin, most probably across the Silesian-Moravian or the East Carpathian gates before the late Anisian. This very speciose genus, so far almost restricted to the Middle Triassic, has also been reported from localities in Eastern Switzerland, the Netherlands, Spain, Slovenia, and China. Pending the taxonomic and phylogenetic study of these other material of Eosemionotus, the origin of the genus in the Western or Eastern Tethys remains enigmatic.


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Article DOI: https://doi.org/10.26879/904

Project DOI: 10.7934/P3211, http://dx.doi.org/10.7934/P3211
This project containsMatrices
  • 23 Media
  • 1 Matrix
  • 1 Document
  • 50 Taxa
  • 11 Specimens
  • 192 Characters
Total size of project's media files: 128 MB

Download Project SDD File
Total scored cells: 6624
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 192
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 622
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:181/11
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MorphoBank Project 3211


    Members

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    Adriana Lopez-Arbarello
    Project Administrator
    Last logged in 03/06/19
    50112301920121006624
    (6220, 0, 404)
    0152000


    Taxonomic Overview for Matrix 'M25504' (50 Taxa)

    taxon unscored
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    [1] † Watsonulus eugnathoides
    Last Modified in 03/06/19
    33144144015001
    [2] Amia calva
    Last Modified in 03/06/19
    4162161027001
    [3] † Araripelepidotes temnurus
    Last Modified in 03/06/19
    5213212408001
    [4] Atractosteus spatula
    Last Modified in 06/19/18
    3174166015001
    [5] † Callipurbeckia minor
    Last Modified in 03/06/19
    4014914303001
    [6] † Camerichthys lunae
    Last Modified in 03/06/19
    120707002001
    [7] † Cuneatus cuneatus
    Last Modified in 03/06/19
    44134129014001
    [8] † Cuneatus wileyi
    Last Modified in 03/06/19
    60119115013001
    [9] † Dentilepisosteus laevis
    Last Modified in 03/06/19
    3614914907001
    [10] † Histionotus oberndorferi
    Last Modified in 03/06/19
    78103102011001
    [11] † Isanichthys lertboosi
    Last Modified in 03/06/19
    6512512402001
    [12] † Isanichthys palustris
    Last Modified in 03/06/19
    110818101001
    [13] † Kyphosichthys grandei
    Last Modified in 03/06/19
    561339503001
    [14] † Lepidotes gigas
    Last Modified in 03/06/19
    2916215002001
    [15] Lepisosteus osseus
    Last Modified in 03/06/19
    4175170014001
    [16] † Macrosemimimus fegerti
    Last Modified in 03/06/19
    3715314905001
    [17] † Macrosemius rostratus
    Last Modified in 03/06/19
    25149149018001
    [18] † Masillosteus janeae
    Last Modified in 03/06/19
    44135129013001
    [19] † Masillosteus kelleri
    Last Modified in 03/06/19
    62117111013001
    [20] † Neosemionotus puntanus
    Last Modified in 03/06/19
    6113112601001
    [21] † Notagogus denticulatos
    Last Modified in 03/06/19
    1018181010001
    [22] † Obaichthys decoratus
    Last Modified in 03/06/19
    43138134011001
    [23] † Occitanichthys canjuersensis
    Last Modified in 03/06/19
    5213713703001
    [24] † Paralepidotus ornatus
    Last Modified in 03/06/19
    93929207001
    [25] † Pliodetes nigeriensis
    Last Modified in 03/06/19
    8111011001001
    [26] † Propterus elongatus
    Last Modified in 03/06/19
    44137137011001
    [27] † Sangiorgioichthys aldae
    Last Modified in 03/06/19
    7711110805001
    [28] † Sangiorgioichthys sui
    Last Modified in 03/06/19
    4014913706001
    [29] † Sangiorgioichthys valmarensis
    Last Modified in 03/06/19
    107858401001
    [30] † Scheenstia mantelli
    Last Modified in 03/06/19
    6213012602001
    [31] † Scheenstia maximus
    Last Modified in 03/06/19
    94969602001
    [32] † Scheenstia zappi
    Last Modified in 03/06/19
    7311811801001
    [33] † Semiolepis brembanus
    Last Modified in 03/06/19
    8510410304001
    [34] † Semionotus bergeri
    Last Modified in 03/06/19
    8410410404001
    [35] † Semionotus capensis
    Last Modified in 03/06/19
    6712011905001
    [36] † Semionotus elegans
    Last Modified in 03/06/19
    2316316206001
    [37] † Thaiichthys buddhabutrensis
    Last Modified in 03/06/19
    4914114102001
    [38] † Ticinolepis crassidens
    Last Modified in 03/06/19
    4714113705001
    [39] † Ticinolepis longaeva
    Last Modified in 03/06/19
    2816116004001
    [40] † Tlayuamichin itztli
    Last Modified in 03/06/19
    4514514403001
    [41] † Eosemionotus vogeli
    Last Modified in 03/06/19
    63115111015001
    [42] † Eosemionotus ceresiensis
    Last Modified in 03/06/19
    71108106014001
    [43] † Eosemionotus diskosomus
    Last Modified in 03/06/19
    50127127015001
    [44] † Eosemionotus sceltrichensis
    Last Modified in 03/06/19
    63109109020001
    [45] † Eosemionotus minutus
    Last Modified in 03/06/19
    819797014001
    [46] † Macrosemius furneti
    Last Modified in 03/06/19
    66109108017001
    [47] † Paleomacrosemius thiollieri
    Last Modified in 03/06/19
    74101100017001
    [48] † Lophionotus sanjuanensis
    Last Modified in 03/06/19
    7611310904001
    [49] † Lophionotus chinleana
    Last Modified in 03/06/19
    90989604001
    [50] † Lophionotus kanabensis
    Last Modified in 03/06/19
    105837904001


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