Aethiocarenus burmanicus (lat.) Is a fossil insect species from the monotypic genus Aethiocarenus and the family Aethiocarenidae . Due to the unusual triangular shape of the head, it is allocated to a separate detachment Aethiocarenodea . Found in Burmese amber ( Myanmar ) of the Cretaceous [1] [2] .
| † Aethiocarenus burmanicus |
 |
| Scientific classification |
|---|
| No rank : | Bilateral symmetrical |
| Subtype : | Tracheo-breathing |
| Infraclass : | Winged insects |
| Squad: | † Aethiocarenodea Poinar & Brown, 2017 |
| Family: | † Aethiocarenidae Poinar & Brown, 2017 |
| Gender: | † Aethiocarenus Poinar & Brown, 2017 |
| View: | † Aethiocarenus burmanicus |
|
| International scientific name |
|---|
Aethiocarenus burmanicus
Poinar & Brown, 2017 |
Geochronologyextinct 99 million years | million years | Period | Era | Aeon |
|---|
| 2,588 | Even | | | Ka | F
but
n
e
R
about
s
about
th | | 23.03 | Neogene | | 66.0 | Paleogen | | 145.5 | a piece of chalk | M
e
s
about
s
about
th | | 199.6 | Yura | | 251 | Triassic | | 299 | Permian | P
but
l
e
about
s
about
th | | 359.2 | Carbon | | 416 | Devonian | | 443.7 | Silur | | 488.3 | Ordovician | | 542 | Cambrian | | 4570 | Precambrian |
◄ Nowadays◄ Cretaceous-Paleogene extinction◄ Triassic extinction◄ Mass Permian Extinction◄ Devonian extinction◄ Ordovician-Silurian extinction◄ Cambrian explosion |
|---|
|
Content
Length 4.5 mm, body elongated, dorso-ventrally flattened. Wings are missing. The legs are narrow and long (especially the back pair, which is more than twice as long as the abdomen), the head is triangular in shape with large eyes. Legs with 5-segmented paws. Abdomen of 10 segments with two 12-segmented cerci. The species was first described in 2017 by American paleoentomologists George Poinar ( George Poinar Jr .; University of Oregon, USA ) and Alex Brown ( Alex E. Brown ). The authors of the discovery could not attribute the new species to any of the existing insect orders and isolated it into the new order Aethiocarenodea , whose representatives apparently died out during the time of the dinosaurs [1] [2] . It is believed that this detachment is close to the detachment Alienoptera , also represented in Burmese amber [3] .
The main difference between Aethiocarenus burmanicus is the unusual shape of the head in the form of an inverted isosceles triangle, and the head is attached to the chest with its vertex angle. All known insects having a triangular-shaped head have a different attachment to it, at the base of the triangle. Presumably, such an unusual device provided the fossil Burmese insect with timely rescue from predators, as it gave a very good view from the side. Also presumably, judging by the morphological features, Aethiocarenus burmanicus was omnivorous and ran fast [1] [2] [4] .
External Images