''Alienopterus brachyelytrus'' is an extinct

insect Insects (from Latin ') are pancrustacean hexapod invertebrates of the class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body ( head, thorax and abdomen), three ...

described from a 99 million year old fossil found in

Burmese amber Burmese amber, also known as Burmite or Kachin amber, is amber from the Hukawng Valley in northern Myanmar. The amber is dated to around 100 million years ago, during the latest Albian to earliest Cenomanian ages of the mid-Cretaceous period. The ...

from the

Hukawng Valley The Hukawng Valley ( my, ဟူးကောင်းချိုင့်ဝှမ်း; also spelt Hukaung Valley) is an isolated valley in Myanmar, roughly in area. It is located in Tanaing Township in the Myitkyina District of Kachin State ...

of Myanmar. It was the first known member of the order

Alienoptera Alienopteridae is an extinct family of dictyopterans, known from the Mid-Cretaceous to Eocene. They are noted for their unusual combination of features not found in other dictyopterans. Taxonomy It was originally assigned to its own order Alie ...

until 2018, when the second and third members of the order, '' Caputoraptor elegans'', and '' Alienopterella stigmatica'' were described. ''A. brachyelytrus'' has characters that are shared with

cockroach Cockroaches (or roaches) are a Paraphyly, paraphyletic group of insects belonging to Blattodea, containing all members of the group except termites. About 30 cockroach species out of 4,600 are associated with human habitats. Some species are we ...

es and mantids and is thought to represent either the

sister taxon In phylogenetics, a sister group or sister taxon, also called an adelphotaxon, comprises the closest relative(s) of another given unit in an evolutionary tree. Definition The expression is most easily illustrated by a cladogram: Taxon A and ...

, or an ancestor to

mantids Mantidae is one of the largest families in the order of praying mantises, based on the type species '' Mantis religiosa''; however, most genera are tropical or subtropical. Historically, this was the only family in the order, and many referen ...

. ''Alienopterus'' has shortened forewings and functional hindwings capable of flight that are attached to pads as in the Mantophasmatodea. The foreleg has a femoral brush which is a characteristic of Mantodea. The mouth points downward from the body axis and has biting mouthparts suggestive of a predator. The antenna is long and there are large compound eyes as well as three ocelli on the head (which is never found in the Blattodea).

References

Prehistoric insect genera Burmese amber Fossil taxa described in 2016 Cenomanian life {{cretaceous-insect-stub

See also

References