Asteriornis

  • asteriornis
    temporal range: late maastrichtian
    66.8–66.7 ma
    preЄ
    Є
    o
    s
    d
    c
    p
    t
    j
    k
    pg
    n
    scientific classification e
    kingdom: animalia
    phylum: chordata
    class: aves
    infraclass: neognathae
    clade: pangalloanserae
    genus: asteriornis
    field et al. 2020
    type species
    asteriornis maastrichtensis
    field et al. 2020

    asteriornis ("asteria's bird"[1]) is an extinct genus of bird from the late cretaceous of belgium which is known from a single species, asteriornis maastrichtensis. it was closely related to birds of the extant superorder galloanserae such as chickens and ducks. members of the genus were small, long-legged birds (~394 g)[2][3] that lived near the coastline and co-existed with more "primitive" types of birds such as ichthyornis. asteriornis is one of the oldest-known birds belonging to the group neornithes, which encompasses all modern birds. it possesses characteristics of both galliformes (chicken-like birds) and anseriformes (duck-like birds), indicating its position as a close relative of the last common ancestor for both groups.[2][4]

    asteriornis may shed light on why neornithes were the only dinosaurs to survive the cretaceous–paleogene extinction event. its coexistence with non-neornithean birds such as ichthyornis implies that competition was not a primary factor for the extinction of non-neornitheans, which resembled modern birds in most respects but died out with other non-avian dinosaurs. small size,[5] a terrestrial lifestyle,[6] and a generalist diet[7] have all been inferred as ecological advantages possessed by early neornithes, allowing them to survive and diversify in the wake of the extinction.[4][8] asteriornis fulfills these qualities, suggesting that such suspicions were justified.[2] asteriornis is also evidence against a different hypothesis stating that modern birds originated from southern continents. this was supported by observations on modern bird diversity[9] and the discovery of vegavis (a possible neornithean from antarctica),[10] but asteriornis's presence in europe suggests that modern birds may have been widespread in northern continents in their early evolution.[2]

  • discovery and naming
  • description
  • classification
  • references

Asteriornis
Temporal range: Late Maastrichtian
66.8–66.7 Ma
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Infraclass: Neognathae
Clade: Pangalloanserae
Genus: Asteriornis
Field et al. 2020
Type species
Asteriornis maastrichtensis
Field et al. 2020

Asteriornis ("Asteria's bird"[1]) is an extinct genus of bird from the Late Cretaceous of Belgium which is known from a single species, Asteriornis maastrichtensis. It was closely related to birds of the extant superorder Galloanserae such as chickens and ducks. Members of the genus were small, long-legged birds (~394 g)[2][3] that lived near the coastline and co-existed with more "primitive" types of birds such as Ichthyornis. Asteriornis is one of the oldest-known birds belonging to the group Neornithes, which encompasses all modern birds. It possesses characteristics of both galliformes (chicken-like birds) and anseriformes (duck-like birds), indicating its position as a close relative of the last common ancestor for both groups.[2][4]

Asteriornis may shed light on why Neornithes were the only dinosaurs to survive the Cretaceous–Paleogene extinction event. Its coexistence with non-neornithean birds such as Ichthyornis implies that competition was not a primary factor for the extinction of non-neornitheans, which resembled modern birds in most respects but died out with other non-avian dinosaurs. Small size,[5] a terrestrial lifestyle,[6] and a generalist diet[7] have all been inferred as ecological advantages possessed by early neornithes, allowing them to survive and diversify in the wake of the extinction.[4][8] Asteriornis fulfills these qualities, suggesting that such suspicions were justified.[2] Asteriornis is also evidence against a different hypothesis stating that modern birds originated from southern continents. This was supported by observations on modern bird diversity[9] and the discovery of Vegavis (a possible neornithean from Antarctica),[10] but Asteriornis's presence in Europe suggests that modern birds may have been widespread in northern continents in their early evolution.[2]

Other Languages
čeština: Asteriornis
español: Asteriornis
français: Asteriornis
Bahasa Indonesia: Asteriornis
italiano: Asteriornis
Bahasa Melayu: Asteriornis
Nederlands: Asteriornis
polski: Asteriornis
português: Asteriornis
Tiếng Việt: Asteriornis