''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 pairs ...
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. ...
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 i ...
of Myanmar. It was the first known member of the
order
Order, ORDER or Orders may refer to:
* Categorization, the process in which ideas and objects are recognized, differentiated, and understood
* Heterarchy, a system of organization wherein the elements have the potential to be ranked a number of ...
Alienoptera 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 references s ...
.
''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).
See also
* ''
Manipulator'', an extinct cockroach that have characters similar to mantids
References
Prehistoric insect genera
Burmese amber
Fossil taxa described in 2016
Cenomanian life
{{cretaceous-insect-stub