Species, in metaphysics, is a specific genus-differentia defined item that is described first by its genus (genos) and then its differentia (diaphora).
 Put differently, it is an item, not necessarily biological, that belongs to a group and can be distinguished from other species in that group.
Choconta is a genus of froghoppers in the family of "Cercopidae".
 The genus has been described first by Fennah in 1979.
Ixiolirion is a genus of flowering plants native to central and southwest Asia, first described as a genus in 1821.
 Recent classifications place the group in the monogeneric family Ixioliriaceae in the order Asparagales of the monocots.
 In earlier systems of classification, it was usually placed in the family Amaryllidaceae.
Pogonoloma is a mushroom genus in the family Tricholomataceae in a broad sense.
 The genus contains two species known from Europe.
 "Pogonoloma" was described first as a subgenus of the genus "Porpoloma" but recent molecular evidence separates the two by several other genera, with "Porpoloma" remaining within a smaller family Tricholomataceae.
Neotibicen tibicen also called the swamp cicada or morning cicada, is a medium-sized, dark-bodied annual cicada widespread across much of the eastern and central United States.
 This species is reproductively active particularly in the morning, hence its common name morning cicada.
 It used to be widely known as "Tibicen chloromerus", but in 2005 the name was changed to "Tibicen tibicen" because the species was determined to have been described first under this specific epithet.
 Likewise, the name of this cicada was changed again in July 2015 due to taxonomic reconfiguration and evaluation of genetics and physiology of the genus "Tibicen".
 The genus "Tibicen" is now restricted to only a few European cicada species.
 This is the most frequently encountered "Neotibicen" species because males prefer to sing from low branches of trees.
 There are two poorly defined subspecies, "N. tibicen tibicen" and "N. tibicen australis".
 The latter is restricted to peninsular Florida and southern Georgia, while the former is found throughout the eastern and southern United States.
 "N. tibicen" is readily confused with "Neotibicen lyricen", which is similar in body coloration.
 "N. tibicen" is of no economic importance.
Sinibrama wui is a species of ray-finned fish in the genus "Sinibrama" which is endemic to China.
 It is the type species of the genus "Sinibrama" but there is some controversy as to which form was described first.
 If the form descrinbed by S.Y Lin in 1932 is considered specifically distinct from that described by Rendahl then the form named by Rendahl should revert to the binomial "Sinibrama typus".
Choconta circulata is a species of froghopper in the genus "Choconta", of the family of Cercopidae.
 The species has been named formerly "Sphenorhina circulata" (Lallemand), "Tomaspis circulata" (Fennah), and originally "Cercopis circulatus".
 The species has been described first by French entomologist Félix Édouard Guérin-Méneville in 1844.
Allosyncarpia ternata, commonly known as "An-binik", is a species of rainforest trees constituting part of the botanical family Myrtaceae and included in the Eucalypts group.
 It is the only species described in its genus Allosyncarpia, in 1981 by Stanley Blake of the Queensland Herbarium.
 They grow naturally into large, spreading, shady trees, found only (endemic) in the Northern Territory of Australia.
 They grow in sandstone gorges along creeks emerging from the Arnhem Land plateau.

Question: Which genus was described first, Ixiolirion or Allosyncarpia?
Answer: Ixiolirion