# Jansonius

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***Jansonius*** is a [genus](/source/Genus) of [leaf beetles](/source/Leaf_beetle) in the subfamily [Eumolpinae](/source/Eumolpinae). It is found in [Chile](/source/Chile)[2] and [Argentina](/source/Argentina).[3] It was formerly placed in the tribe [Adoxini](/source/Adoxini), section Myochroites, but is now placed in [Nodinini](/source/Nodinini), section Metachromites.[4]

## Species

The genus contains at least one valid species:

- *[Jansonius aeneus](/source/Jansonius_aeneus)* ([Blanchard](/source/%C3%89mile_Blanchard), 1851) (Synonyms: *Eumolpus? valdivianus* [Philippi](/source/Rodolfo_Amando_Philippi) & [Philippi](/source/Federico_Philippi), 1864; *Chaetocnema blanchardi* [Baly](/source/Joseph_Sugar_Baly), 1877; *Jansonius alternatus* [Baly](/source/Joseph_Sugar_Baly), 1878[1])[4]

*Dia patagonica* Boheman, 1858, also from Chile, was placed in the genus by [Jan Bechyné](/source/Jan_Bechyn%C3%A9) in 1953, but as the type is apparently lost or destroyed, this species is considered *[incertae sedis](/source/Incertae_sedis)* in Eumolpinae by Askevold & LeSage (1990).[4]

Several additional species were described in or assigned to the genus by Jan Bechyné from other countries in [South America](/source/South_America), though these may not belong to the genus according to Askevold & LeSage (1990):[4]

- *[Jansonius boggianii](/source/Jansonius_boggianii)* ([Jacoby](/source/Martin_Jacoby), 1899) – Paraguay, Argentina
- *[Jansonius pubescens](/source/Jansonius_pubescens)* [Bechyné](/source/Jan_Bechyn%C3%A9), 1955 – Paraguay
- *[Jansonius scolytinus](/source/Jansonius_scolytinus)* [Bechyné](/source/Jan_Bechyn%C3%A9) & Bechyné, 1961[5] – Brazil
- *[Jansonius vigiensis](/source/Jansonius_vigiensis)* [Bechyné](/source/Jan_Bechyn%C3%A9) & Bechyné, 1961[6] – Brazil

## References

1. Baly, J. S. (1878). "Description of New Species and Genera of Eumolpidæ". *[Zoological Journal of the Linnean Society](/source/Zoological_Journal_of_the_Linnean_Society)*. **14** (75): 246–265. [doi:10.1111/j.1096-3642.1878.tb01834.x](https://doi.org/10.1111/j.1096-3642.1878.tb01834.x)

1. Elgueta, M.; Daccordi, M.; Zoia, S. (2017). ["Lista de las especies de Spilopyrinae y Eumolpinae (Coleoptera: Chrysomelidae) de Chile"](http://www.chrysomelidae.it/Chrysomelidae/pubblicazioni-pdf-scaricabili/76-Elgueta%20Daccordi%20Zoia%202017%20Bol%20Mus%20Chile%2066%2067-84.pdf) (in Spanish). *Boletín del Museo Nacional de Historia Natural, Chile*. **66**: 67–84. [doi:10.54830/bmnhn.v66.n1.2017.73](https://doi.org/10.54830/bmnhn.v66.n1.2017.73). [S2CID 255713904](https://api.semanticscholar.org/CorpusID:255713904)

1. Gönc L., Romina; Cabrera, Nora; Casaux, Ricardo; Szulkin-Dolhatz, Daniel (2016). ["Nuevos registros de Chrysomelidae (Coleoptera): *Mylassa crassicollis* (Blanchard) y *Jansonius aeneus* (Blanchard) asociados a *Nothofagus antarctica* (G. Forst.) Oerst para la provincia de Chubut, Argentina"](http://www.insectachile.cl/rchen/pdfs/2016v41/Gonc_et_al_2016.pdf) [New records of Chrysomelidae (Coleoptera): *Mylassa crassicollis* (Blanchard) and *Jansonius aeneus* (Blanchard) associated with *Nothofagus antarctica* (G. Forst.) Oerst in Chuput Province (Argentina)] (in Spanish). *[Revista Chilena de Entomología](/source/Revista_Chilena_de_Entomolog%C3%ADa)*. **41**: 90–95.

1. Askevold, I. S. & LeSage, L. (1990). ["A taxonomic revision of the genus *Jansonius* Baly 1878: Taxonomic confusion and tribal reclassification (Coleoptera: Chrysomelidae: Eumolpinae)"](http://www.insectachile.cl/rchen/pdfs/1990v18/Askevold_Lessage_1990.pdf). *[Revista Chilena de Entomología](/source/Revista_Chilena_de_Entomolog%C3%ADa)*. **18**: 29–37.

1. Bechyné, J. & Springlovà de Bechyné, B. (1961). ["Notas sobre Chrysomeloidea neotropicais"](https://web.archive.org/web/20190119121108/http://chrysomelidae.miza-ucv.org.ve/sites/chrysomelidae.miza-ucv.org.ve/files/1961_Separata_151.pdf). *Boletim do Museu Paraense Emilio Goeldi*. **33**: 1–49. New Series. Archived from [the original](http://chrysomelidae.miza-ucv.org.ve/sites/chrysomelidae.miza-ucv.org.ve/files/1961_Separata_151.pdf) on 2019-01-19. Retrieved 2019-02-21.

1. Bechyné, J. & Springlovà de Bechyné, B. (1961). ["Notas sobre Chrysomeloidea Neotropicais II"](https://web.archive.org/web/20190511180157/http://chrysomelidae.miza-ucv.org.ve/sites/chrysomelidae.miza-ucv.org.ve/files/1961_Separata_152.pdf). *Boletim do Museu Paraense Emilio Goeldi*. **37**: 1–93. New Series. Archived from [the original](http://chrysomelidae.miza-ucv.org.ve/sites/chrysomelidae.miza-ucv.org.ve/files/1961_Separata_152.pdf) on 2019-05-11. Retrieved 2019-02-20.

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Adapted from the Wikipedia article [Jansonius](https://en.wikipedia.org/wiki/Jansonius) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Jansonius?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.