Project 3914: G. Mayr. 2021. An early Eocene fossil from the British London Clay elucidates the evolutionary history of the enigmatic Archaeotrogonidae (Aves, Strisores). Papers in Palaeontology. Early View:none yet.
Specimen: † Archaeodromus anglicus
View: Bones of holotype

Abstract

Archaeotrogons have long been known from late Eocene and Oligocene localities in France, where limb bones are abundantly represented. The phylogenetic affinities of these birds, however, have remained elusive. Although archaeotrogons are now considered to be representatives of the Strisores, the clade including ‘caprimulgiform’ and apodiform birds, their exact position in this clade is unresolved. Here, a partial skeleton of a new species of the Archaeotrogonidae is described from the early Eocene London Clay of Walton-on-the-Naze (Essex, UK). In addition, a new specimen of the archaeotrogon Hassiavis from the latest early or earliest middle Eocene of the Messel fossil site in Germany is reported, which is the best preserved skeleton of this species. Archaeodromus anglicus gen. et sp. nov. from the London Clay is the earliest archaeotrogon known to date, and the holotype shows previously unknown skeletal characteristics of archaeotrogons that bear on the phylogenetic affinities of these birds. The quadrate in particular exhibits a distinctive morphology and shows derived morphological characteristics of the Strisores. Although the primary analysis did not conclusively resolve the affinities of archaeotrogons, analyses constrained to a molecular scaffold resulted in a sister group relationship to the Caprimulgidae (nightjars). The evolutionary history of this most species-rich group of nocturnal Strisores is virtually unknown, and recognition of archaeotrogons as archaic stem group representatives of the Caprimulgidae would fill a striking gap in the fossil record.


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Article DOI: 10.1002/spp2.1392

Project DOI: 10.7934/P3914, http://dx.doi.org/10.7934/P3914
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 14 Taxa
  • 1 Specimen
  • 86 Characters
Total size of project's media files: 29.04k

Download Project SDD File
Total scored cells: 951
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 86
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 179
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:86/0
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MorphoBank Project 3914

    Authors' Institutions

    • Senckenberg Museum, Frankfurt



    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
    rules
    Gerald Mayr
    Project Administrator
    1110000
    (0, 0, 0)
    000
    Sally Thomas
    Full membership
    0000000
    (0, 0, 0)
    000


    Taxonomic Overview for Matrix 'M27588' (13 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
    support
    NPA
    cells
    "-" cellscell images labels on
    cell images
    member
    access
    [1] Tinamiformes
    Last Modified in 07/13/21
    0878600002
    [2] Anseriformes
    Last Modified in 07/13/21
    0908600002
    [3] Steatornithidae
    Last Modified in 07/13/21
    1858500002
    [4] Podargidae
    Last Modified in 07/13/21
    3868300002
    [5] Caprimulgidae
    Last Modified in 07/13/21
    0898600002
    [6] Nyctibiidae
    Last Modified in 07/13/21
    2848400002
    [7] Aegothelidae
    Last Modified in 07/13/21
    1858500002
    [8] Apodidae
    Last Modified in 07/13/21
    1898500002
    [9] Hemiprocnidae
    Last Modified in 07/13/21
    8787800002
    [10] Trochilidae
    Last Modified in 07/13/21
    2858400002
    [11] † Archaeotrogon
    Last Modified in 07/13/21
    61262500002
    [12] † Hassiavis
    Last Modified in 07/13/21
    50363600002
    [13] † Archaeodromus
    Last Modified in 07/13/21
    55313100002


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    Bibliography47
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    Specimen list179
    Taxon list375




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