Chrysina gloriosa

Chrysina gloriosa is a species of scarab whose common names are glorious beetle and glorious scarab. The adults are 25 to 28 millimetres (0.98 to 1.10 in) long and are bright green with silver stripes on the elytra. These iridescent stripes on the cuticle of the elytra are a result of cholesteric liquid crystal organization of chitin molecules.[1] The differences in color are a result of the microscopic structure of each section, with green reflected from cusp-like structures and silver reflected from flat layers parallel to the surface of the elytra.[2] As established through Mueller matrix spectroscopic ellipsometry,[3][4] the optical properties change with the incidence angle of the propagating light. The polygonal cells in the green stripes generate self-healing Bessel beams.[5] The adults eat juniper leaves at a high elevation and are able to camouflage by blending in with plants. The species is sometimes incorrectly thought to be endangered,[6] but has never been listed either in the IUCN Red List of Threatened Species or under the United States Endangered Species Act. An invalid synonym used to be Plusiotis gloriosa.[7]

Chrysina gloriosa
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Coleoptera
Family: Scarabaeidae
Genus: Chrysina
Species:
C. gloriosa
Binomial name
Chrysina gloriosa
(LeConte, 1854)
Synonyms

Plusiotis gloriosa

References
  1. Pace, A. (1972). "Cholesteric liquid crystal-like structure of the cuticle of Plusiotis gloriosa". Science. 176: 678–680. doi:10.1126/science.176.4035.678.
  2. Agez, G.; Bayon, C.; Mitov, M. (2017). "Multiwavelength micromirrors in the cuticle of scarab beetle Chrysina gloriosa". Acta Biomaterialia. 48: 357–367. doi:10.1016/j.actbio.2016.11.033.
  3. Fernández del Río, Lía; Arwin, Hans; Järrendahl, Kenneth (2014). "Polarizing properties and structural characteristics of the cuticle of the scarab Beetle Chrysina gloriosa". Thin Solid Films. 571: 410–415. doi:10.1016/j.tsf.2013.11.149.
  4. Ŕıo, L. Fernández del; Arwin, Hans; Järrendahl, Kenneth (2014). "Polarization of Light Reflected from Chrysina Gloriosa Under Various Illuminations". Materials Today: Proceedings. 1: 172–176. doi:10.1016/j.matpr.2014.09.020.
  5. Bouchal, P.; Kapitán, J.; Konecny, M; Zbončák, M.; Bouchal, Z. (2019-12-01). "Non-diffracting light in nature: Anomalously reflected self-healing Bessel beams from jewel scarabs". APL Photonics. 4 (12): 126102. doi:10.1063/1.5125045. ISSN 2378-0967.
  6. Arnett, Ross H., Jr.; Richard L. Jacques, Jr. (1981). Simon & Schuster's Guide To Insects. New York, New York: Simon & Schuster. p. 108. ISBN 0-671-25014-0.
  7. "Species Chrysina gloriosa — Glorious Scarab". Bug Guide. Retrieved September 18, 2009.


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