Bromius

Life-forms

Superregnum: Eukaryota
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Ecdysozoa
Cladus: Panarthropoda
Phylum: Arthropoda
Subphylum: Hexapoda
Classis: Insecta
Cladus: Dicondylia
Subclassis: Pterygota
Ordo: Coleoptera
Subordo: Polyphaga
Infraordo: Cucujiformia
Cladus: Phytophaga
Superfamilia: Chrysomeloidea

Familia: Chrysomelidae
Subfamilia: Eumolpinae
Tribus: Bromiini
Genus: Bromius
Species: B. obscurus
Name

Bromius Chevrolat in Dejean, 1836: 412 [conserved name]

Type species: Chrysomela obscura Linnaeus, 1758, by subsequent designation by Monrós & Bechyné (1956: 1127).

Placed on the Official List of Generic Names in Zoology by Opinion 2298.
Synonyms

Eumolpus Illiger, 1798: 498 (as "Eumolpus Kugel.") [suppressed name]
Type species: Cryptocephalus vitis Fabricius, 1775 [= Chrysomela obscura Linnaeus, 1758], by subsequent designation by Latreille, 1810: 432.
Placed on the Official Index of Rejected and Invalid Generic Names in Zoology by Opinion 2298.
Adoxus Kirby, 1837: 209 [described as subgenus of Eumolpus]
Type species: Cryptocephalus vitis Fabricius, 1775 [= Chrysomela obscura Linnaeus, 1758], by original designation.
Chartonia Gistel, 1856: 381 [syn. Bezděk (2020: 178)]
Type species: Chrysomela obscura Linnaeus, 1758, by subsequent designation by Bezděk (2020: 178)

References
Primary references

Bezděk, J. 2020. Review of the genus-level names proposed by Johannes Gistel in Chrysomelidae (Coleoptera). Acta Entomologica Musei Nationalis Pragae 60(1): 173–188. DOI: 10.37520/aemnp.2020.011 Open access. Reference page.
Chevrolat, L.A.A. 1836. [new taxa]. In: Dejean, P.F.M.A. Catalogue des Coléoptères de la collection de M. le comte Dejean. Deuxième édition. [Livraison 5]. Paris: Méquignon-Marvis Père et Fils. pp. 361–443. BHL. Reference page.
Gistel, J.N.F.X. 1856. Die Mysterien der europäischen Insectenwelt. Ein geheimer Schlüssel für Sammler aller Insecten-Ordnungen und Stände, behufs des Fangs, des Aufenhalts-Orts, der Wohnung, Tag- und Jahreszeit u.s.w., oder autoptische Darstellung des Insectenstaats in seinem Zusammenhange zum Bestehen des Naturhaushaltes überhaupt und insbesondere in seinem Einflusse auf die phanerogamische und cryptogamische Pflanzenberöltzerrung Europa’s. Zum ersten Male nach 25 jährigen eigenen Erfahrungen zusammengestellt und herausgegeben. Kempten: T. Dannheimer, xii + 530 + [2] pp. DOI: 10.5962/bhl.title.65996. Reference page.
ICZN. 2012. Opinion 2298 (Case 3519). Eumolpus Weber, 1801, Chrysochus Chevrolat in Dejean, 1836 and Bromius Chevrolat in Dejean, 1836 (Insecta, Coleoptera, CHRYSOMELIDAE): usage conserved. Bulletin of Zoological Nomenclature 69(2): 147–149. DOI: 10.21805/bzn.v69i2.a6 Paywall. Reference page.
Illiger, J.K.W. 1798. Verzeichniss der Käfer Preussens. Entworfen von Johann Gottlieb Kugelann Apotheker in Osterode. Ausgearbeitet von Johann Karl Wilhelm Illiger. Mit einer Vorrede des Professors und Pagenhofmeisters Hellwig in Braunschweig, und dem angehängten Versuche einer natürlichen Ordnungs- und Gattungs-Folge der Insekten. Johann Jacob Gebauer, Halle, xlii + [1] + 510 + [1 (Zusätze)] pp. BHL. Münchener Digitalisierungszentrum Digitale Bibliothek: Online version (German). Reference page.
Kirby, W. 1837. The insects. In: Richardson J. (Ed.), Fauna boreali-Americana; or the zoology of the northern parts of British America: containing descriptions of the objects of natural history collected on the late northern land expeditions, under command of Captain Sir John Franklin, RN. Part 4. J. Fletcher, Norwich; 325 + [2] pp., 8 pls. BHL Reference page.
Latreille, P.A. 1810. Considérations générales sur l'ordre naturel des animaux composant les classes des crustacés, des arachnides, et des insectes : avec un tableau méthodique de leurs genres, disposés en familles. Paris: Schoell, 444 pp. BHL Reference page.
Monrós, F. & Bechyné, J. 1956. Über einige verkannte Chrysomeliden-Namen. Entomologische Arbeiten aus dem Museum G. Frey 7(3): 1118–1137. BHL Reference page.

Additional references

Löbl, I. & Smetana, A.. 2010. Catalogue of Palaearctic Coleoptera. Vol. 6, 2010. Index to species-group names. Apollo Books, Stenstrup, Denmark. 507 pp. Full article (PDF).
Moseyko, A.G. & Sprecher-Uebersax, E. 2010. Subfamily Eumolpinae Hope, 1840. Pp. 619–643. In: Löbl, I. & Smetana, A. (eds.) Catalogue of Palaearctic Coleoptera. Volume 6. Chrysomeloidea. Apollo Books, Stenstrup, Denmark. 924 pp. ISBN 978-87-88757-84-2. Google Books. Reference page.
Riley, E.G., Clark, S.M. & Seeno, T.N. 2003. Catalog of the leaf beetles of America North of Mexico (Coleoptera: Megalopididae, Orsodacnidae and Chrysomelidae, excluding Bruchinae). Coleopterists Society, Special Publication No. 1. Sacramento, CA. 290 pp. ISBN 978-0-9726087-1-8. PDF. Reference page.

Links

ZooBank: act:2B0C2AE5-416A-43B6-87BB-7B50FC8A874D
Bromius Chevrolat, 1837. Chrysomelidae - The Leaf Beetles of Europe and the Mediterranean Subregion (Checklist and Iconography).
Adoxus obscurus (L., 1758) - photo by D.V. Dolivo-Dobrovolskiy
ION search for Bromius
ION search for Adoxus
Nomenclator Zoologicus search for Bromius
Nomenclator Zoologicus search for Adoxus

Vernacular names
русский: Падучки

Bromius is a genus of leaf beetles in the subfamily Eumolpinae. It contains only one species, Bromius obscurus (also called the western grape rootworm).[4] The distribution of the species is holarctic; it can be found in North America, wide parts of Europe, and Asia. The species is a known pest of grape vines in Europe and western North America.[5]

Etymology

The genus is named after Bromius, an epithet of the Greek god Dionysus.[6]
Taxonomic history

Bromius obscurus was first described as Chrysomela obscura by Carl Linnaeus in his 1758 10th edition of Systema Naturae. In 1836, the genus Bromius was first established by Louis Alexandre Auguste Chevrolat in Dejean's Catalogue des Coléoptères, including Linnaeus's Chrysomela obscura as well as the species Eumolpus hirtus (now in Trichochrysea) and Cryptocephalus vitis (now a synonym of Bromius obscurus).[7] In 1837, William Kirby established the name Adoxus (derived from the Greek for "inglorious") as a subgenus of Eumolpus, with the species Cryptocephalus vitis as the type.[1] Adoxus was later found to be a synonym of Bromius, though historically some entomologists preferred to use the name Adoxus, since at the time it was thought Chevrolat's name was unavailable.[8]

The generic name Bromius Chevrolat in Dejean, 1836 is a conserved name. It was threatened by Eumolpus in the sense used by Kugelann in Illiger, 1798, which included both Chrysomela obscura and Cryptocephalus vitis. This was because Latreille had designated the latter as the type species of Eumolpus in 1810, placing Bromius as a synonym of Eumolpus. An application to conserve Bromius and other names by suppressing Eumolpus Illiger, 1798 was accepted by the International Commission on Zoological Nomenclature in 2012.[9][10]
Description and variations

Bromius obscurus adults are generally colored black, covered with dull yellow-grey hairs. The elytra and tibiae are either black or reddish-brown. The basal four segments of the antennae are colored orange-red. The species measures 5.0–6.0 mm in body length.[11]

A number of variations of the species have been described:[12]

Typical form: Elytra black, covered by whitish hairs.
var. weisei (Heyden, 1883): Elytra black, hairs yellowish, tibiae basally reddish brown.
var. epilobii (Weise, 1882): Elytra and tibiae brown, hairs whitish.
var. villosulus (Schrank, 1781): Elytra brown, hairs yellowish.

Historically there was disagreement over whether the obscurus and villosulus variations were in fact two separate species or not, based on morphological differences as well as other factors such as habitat and range of food plants. More recently, authors variously treat them as either variations or separate subspecies of B. obscurus.[13]

The villosulus variation is superficially similar to the species Aoria rufotestacea from Korea. In 2014, it was found that virtually all the Korean specimens of Bromius obscurus were in fact Aoria rufotestacea.[12]
Distribution

B. obscurus is a widespread Holarctic species. In North America, it is distributed across Canada south to North Carolina in the east and California in the west.[14] In Asia, it is one of the few eumolpine species recorded from the north of Siberia.[12]

In the United Kingdom, the B. obscurus was historically known from a single 10 km2 square on the Cheshire/Staffordshire border around the Bosley area.[11] However, the species has not been recorded in this area since 1992. According to a report from 2014, it was very recently found from one site in Scotland, which remains the species' only known location in the UK.[15]
Biology

B. obscurus is known to be geographically parthenogenetic: North American populations of the species reproduce sexually, while European populations reproduce asexually and are triploids.[12]

A stridulatory apparatus has been observed on the upper sides of the wings of B. obscurus, the first known in representatives of the subfamily Eumolpinae. It takes a form of a darkened convex microstructure spot near the end of each wing, between the RS and Cu veins.[16]

Symbiotic bacteria are associated with symbiotic organs found in the gut of B. obscurus. In females, the bacteria are also associated with genital accessory organs. Molecular phylogenetic analysis has showed that the bacterial symbiont of B. obscurus belongs to a distinct lineage of the Gammaproteobacteria.[17]
Fossil record

Fossils of B. obscurus have been found in northeastern Russia, dating back to the late Pleistocene.[18]
Gallery

File:Bromius obscurus.ogvPlay media

Bromius obscurus on grass in a meadow

References

Kirby, W. (1837). "The insects". In Richardson, J. (ed.). Fauna Boreali-Americana; or the zoology of the northern parts of British America: containing descriptions of the objects of natural history collected on the late northern land expeditions, under command of Captain Sir John Franklin, RN. Part the fourth and last. Norwich.: J. Fletcher. p. 209.
Bezděk, J. (2020). "Review of the genus-level names proposed by Johannes Gistel in Chrysomelidae (Coleoptera)". Acta Entomologica Musei Nationalis Pragae. 60 (1): 173–188. doi:10.37520/aemnp.2020.011.
Moseyko, A. G.; Sprecher-Uebersax, E. (2010). "Eumolpinae". In Löbl, I.; Smetana, A. (eds.). Catalogue of Palaearctic Coleoptera. Volume 6. Chrysomeloidea. Stenstrup, Denmark: Apollo Books. pp. 619–643. ISBN 978-87-88757-84-2.
"Species Bromius obscurus - Western Grape Rootworm". BugGuide. Retrieved 25 July 2020.
"Pest Alert – Western Grape Rootworm (Bromius obscurus)" (PDF). www2.gov.bc.ca. Retrieved 4 March 2019.
Chevrolat, L.A.A. (1842). "Bromius". Dictionnaire Universel d'Histoire Naturelle. 2. Paris: MM. Renard, Martinet et Cie. p. 740–741.
Bousquet, Yves; Bouchard, Patrice (2013). "The genera in the second catalogue (1833–1836) of Dejean's Coleoptera collection". ZooKeys (282): 1–219. doi:10.3897/zookeys.282.4401. PMC 3677338. PMID 23794836.
Baly, J. S. (1865). "Attempt at a classification of the Eumolpidae. (Cont.)". The Journal of Entomology. 2: 433–442.
Moseyko, A.G.; Sprecher-Uebersax, E.; Löbl, I. (2010). "Case 3519 Eumolpus Weber, 1801, Chrysochus Chevrolat in Dejean, 1836 and Bromius Chevrolat in Dejean, 1836 (Insecta, Coleoptera, chrysomelidae): proposed conservation of usage". The Bulletin of Zoological Nomenclature. 67 (3): 218–224. doi:10.21805/bzn.v67i3.a10. S2CID 83763033.
ICZN (2012). "Opinion 2298 (Case 3519) Eumolpus Weber, 1801, Chrysochus Chevrolat in Dejean, 1836 and Bromius Chevrolat in Dejean, 1836 (Insecta, Coleoptera, chrysomelidae): usage conserved". The Bulletin of Zoological Nomenclature. 69 (2): 147–149. doi:10.21805/bzn.v69i2.a6. S2CID 83692416. "The Commission has conserved the usage of the generic names Eumolpus Weber, 1801, Chrysochus Chevrolat in Dejean, 1836 and Bromius Chevrolat in Dejean, 1836 by suppressing the name Eumolpus Illiger, 1798."
"Bromius obscurus (Linnaeus, 1758) | UK Beetle Recording". coleoptera.org.uk. Retrieved 4 March 2019.
An, Seunglak; Hong, Chang‐Ki; Kim, Seulki; Lee, Seongkyun; Cho, Soowon (2014). "Aoria rufotestacea Faimaire (Coleoptera: Chrysomelidae) long been confused as Bromius obscurus (Linnaeus) in Korea". Entomological Research. 44 (2): 80–85. doi:10.1111/1748-5967.12052. S2CID 85785577.
Vig, Károly (2011). "On whose shoulders we stand – the pioneering entomological discoveries of Károly Sajó". ZooKeys (157): 159–179. doi:10.3897/zookeys.157.2044. PMC 3253647. PMID 22303108.
"Genus: Bromius". BugGuide. Retrieved 25 July 2020.
A review of the scarce and threatened beetles of Great Britain: The leaf beetles and their allies. Chrysomelidae, Megalopodidae and Orsodacnidae. Species Status No. 19. Natural England Commissioned Report, Number 161 (Report). Natural England. 2014. Retrieved 23 December 2019.
Medvedev, L.N.; Muravitzky, O.S. (2009). "On the presence of a stridulatory apparatus in leaf beetles of the subfamily Eumolpinae (Coleoptera, Chrysomelidae)". Entomological Review. 89 (9): 1030–1034. doi:10.1134/S0013873809090036. S2CID 34046712.
Fukumori, K.; Koga, R.; Nikoh, N.; Fukatsu, T. (2017). "Symbiotic bacteria associated with gut symbiotic organs and female genital accessory organs of the leaf beetle Bromius obscurus (Coleoptera: Chrysomelidae)". Applied Entomology and Zoology. 52 (4): 589–598. doi:10.1007/s13355-017-0513-0. S2CID 12021751.
Kiselev, S. V.; Nazarov, V. I. (2009). "Late Cenozoic insects of northern Eurasia". Paleontological Journal. 43 (7): 732–850. doi:10.1134/S0031030109070016. S2CID 128794777.