Project 1105: A. López-Arbarello, R. Stockar, T. Bürgin. 2014. Phylogenetic Relationships of the Triassic Archaeosemionotus Deecke (Halecomorphi, Ionoscopiformes) from the ‘Perledo Fauna’. PLOS ONE. :e108665.
Specimen: † Archaeosemionotus connectens (PIMUZ/A/I:552)

Abstract

The lagerstätten in the Monte San Giorgio have provided excellent fossils representing one of the most important windows to the marine life during the Triassic. Among these fossils, fishes are abundant and extraordinarily well preserved. Most of these fishes represent extinct lineages and were difficult to understand and classify during the early years after discovery. These difficulties usually led to a mixture of species under the same taxonomic name. This is the case of fishes referred to the genus Archaeosemionotus. The name bearing type of A. connectens, the type species of this genus, represents a basal halecomorph, but most other fishes referred to this genus represent basal ginglymodians. Therefore, we conducted this study to clarify the taxonomic status and phylogenetic relationships of A. connectens, which is a member of the family Furidae (Halecomorphi, Ionoscopiformes) representing the second cladistically supported evidence of ionoscopiforms in the Triassic and it is thus one of the two oldest reliable records of this group. Ionoscopiforms have a long stratigraphic range, though their fossil record is rather patchy. In our analysis, the sister taxon of Archaeosemionotus is Robustichthys from the Anisian of China, and they together form a clade with Furo, which is known from several localities ranging from the Early to the Late Jurassic. Other ionoscopiforms are so far known from the Kimmeridgian to the Albian and it is thus evident that recent efforts have concentrated on the later history of the group (Late Jurassic to Cretaceous). The phylogenetic relationships obtained for the Ionoscopiformes do not show a clear palaeobiogeographic pattern, but give important new insights into the origin, divergence date and early history of this clade.


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Article DOI: doi:10.1371/journal.pone.0108665

Project DOI: 10.7934/P1105, http://dx.doi.org/10.7934/P1105
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 22 Taxa
  • 2 Specimens
  • 57 Characters
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Total scored cells: 1066
Total media associated with cells: 0
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Characters
Total characters: 57
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 129
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Total unordered/ordered characters:57/0
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MorphoBank Project 1105


    Members

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    Adriana López-Arbarello
    Project Administrator
    Last logged in 11/20/14
    2221057057001066
    (1057, 0, 9)
    0000


    Taxonomic Overview for Matrix 'M2534' (22 Taxa)

    taxon unscored
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    [1] Atractosteus spatula
    Last Modified in 02/27/14
    3515103001
    [2] † Dorsetichthys bechei
    Last Modified in 02/27/14
    4515102001
    [3] † Amiopsis lepidota
    Last Modified in 02/27/14
    3545400001
    [4] † Solnhofenamia elongata
    Last Modified in 02/27/14
    2555500001
    [5] † Calamopleurus cylindricus
    Last Modified in 02/27/14
    0575700001
    [6] † Pachyamia mexicana
    Last Modified in 02/27/14
    5525200001
    [7] † Vidalamia catalunica
    Last Modified in 02/27/14
    4535300001
    [8] † Cyclurus kehreri
    Last Modified in 02/27/14
    0575700001
    [9] Amia calva
    Last Modified in 02/27/14
    1565600001
    [10] † Caturus furcatus
    Last Modified in 02/27/14
    0565601001
    [11] † Amblysemius pachyurus
    Last Modified in 02/27/14
    4525201001
    [12] † Liodesmus gracilis
    Last Modified in 02/27/14
    7494901001
    [13] † Ionoscopus cyprinoides
    Last Modified in 02/27/14
    2555500001
    [14] † Ophiopsis procera
    Last Modified in 02/27/14
    11464600001
    [15] † Macrepistius arenatus
    Last Modified in 02/27/14
    18393900001
    [16] † Oshunia brevis
    Last Modified in 02/27/14
    5525100001
    [17] † Watsonulus eugnathoides
    Last Modified in 02/27/14
    2545401001
    [18] † Furo muensteri
    Last Modified in 02/27/14
    24333200001
    [19] † Archaeosemionotus connectens
    Last Modified in 02/27/14
    32252500001
    [20] † Quetzalichtys perrilliatae
    Last Modified in 02/27/14
    11464600001
    [21] † Teoichthys kallistos
    Last Modified in 02/27/14
    28292900001
    [22] † Robustichthys luopinguensis
    Last Modified in 07/23/14
    22353500001


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    Media views3911Media search (3482 views); M328416 (429 views);
    Taxon list5830
    Matrix views1910Matrix landing page (1721 views); Archaeosemionotus (189 views);
    Specimen list1975
    Bibliography3977




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    Total downloads from project145
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