''Arulenus'' is a genus of
pygmy grasshopper. , it consists of two species:
* ''
Arulenus miae''
* ''
Arulenus validispinus''
Both species are
endemic
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...
to
Mindanao
Mindanao ( ) ( Jawi: مينداناو) is the second-largest island in the Philippines, after Luzon, and seventh-most populous island in the world. Located in the southern region of the archipelago, the island is part of an island group of ...
in the Philippines.
Description
Characteristic features of this genus include: the lack of
tegmina and of
alae, a smooth
pronotum with large, slightly wrinkled spines on its discus, and outwardly turned lateral paranotal lobes.
Taxonomic history
Carl Stål circumscribed
In geometry, the circumscribed circle or circumcircle of a polygon is a circle that passes through all the vertices of the polygon. The center of this circle is called the circumcenter and its radius is called the circumradius.
Not every polyg ...
''Arulenus'' in 1877 for the species ''A. validispinus'' and ''A. punctatus'', which Stål described in the same paper.
In 1887,
Ignacio Bolívar
Ignacio Bolívar y Urrutia (9 November 1850, Madrid – 19 November 1944, Mexico City) was a Spanish naturalist and entomologist, and one of the founding fathers of Spanish entomology. He helped found the ''Real Sociedad Española de Histor ...
transferred ''A. punctatus'' to its own, new genus ''
Hirrius'', giving it the name ''
Hirrius punctatus''.
''Arulenus'' would be considered a
monospecific genus until 2016 with Josip Skejo and Joy Honezza S. Caballero's description of ''
Arulenus miae''.
References
{{Taxonbar, from=Q14594084
Taxa named by Carl Stål
Caelifera genera
Insects of the Philippines
Orthoptera of Asia