Eustylini

Eustylini is a primarily Neotropical weevil tribe in the subfamily Entiminae.[1]

Eustylini
Compsus auricephalus
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Coleoptera
Infraorder: Cucujiformia
Family: Curculionidae
Subfamily: Entiminae
Tribe: Eustylini
Lacordaire, 1863
Genera

See text

Taxonomy

The tribe Eustylini was named for the first time by Jean-Baptiste Henri Lacordaire in 1863,[2] although, when first named, the tribe (Groupe Eustylides, p. 205) only contained three genera: Aptolemus (currently in Naupactini), Brachystylus, and Eustylus.

In 1986 the Eustylini contained most of its current genera, mostly due to revised taxonomic placements made by Guillermo Kuschel.[3][1] The latest additions were made by Franz in 2012 by transferring former members of other tribes including Geonemini, Phyllobiini, and Tanymecini.[4]

The type species of some genera (Compsus, Diaprepes, Eustylus, Exorides, and Exophthalmus) were redescribed by Franz.[5] Most species of Eustylini are only known from their original descriptions.[6]

Description

A diagnosis for the tribe was offered by Girón 2020:[6]

Medium to large weevils (approx. 10–25 mm); scale coverage highly variable in presence, density and coloration; iridescent scales, erect setae or waxy secretions are frequently present; surface smooth and even or strongly sculptured and irregular; head (including rostrum) subrectangular, nearly as long or longer than wide; eyes small to mid-sized, slightly dorsally positioned; frons usually as wide as or narrower than interantennal distance, often bearing median fovea; rostrum nearly parallel-sided or broadened apically; dorsal surface of rostrum with variable elevations or depressions, including longitudinal carinae or oblique fossae; antennal scrobe generally fully visible in dorsal view; nasal plate usually well developed, either depressed, flat or elevated regarding surface of rostrum; anterior margin of prothorax in lateral view straight, seldom slightly sinuate, never forming conspicuous postocular lobe; postocular setae may be present, if so, forming a fringe instead of a tuft; elytral shoulders usually well-developed, absent in Brachyomus, reduced in some Compsus and Exorides; tubercles and apical projections may be present on elytra; femora usually not toothed (except in some Eustylus).

— J.C. Girón, Status of knowledge of the broad-nosed weevils of Colombia (Coleoptera, Curculionidae, Entiminae).
Heads in dorsal view: A Exophthalmus B Synthlibonotus C Exorides D Eustylus with characteristic broad antennal scape.

Distribution

Eustylini ranges from south-western USA to Argentina, with its highest diversity in the Caribbean, Central America and northern South America.[1][3][7]

Genera

The tribe Eustylini currently includes 25 genera and 339 sdescribed species:[3][4]

References
  1. Alonso-Zarazaga, M. A.; Lyal, C. H. C. (1999). A world catalogue of families and genera of Curculionoidea (Insecta: Coleoptera) excluding Scolytidae and Platypodidae (PDF). Barcelona, Spain: Entomopraxis. pp. 315 pp.
  2. Lacordaire, T. (1863). Histoire Naturelle des Insectes. Genera des Coléoptères ou exposé méthodique et critique de tous les genres proposés jusqu'ici dans cet ordre d'insectes. Vol. 6. Paris: Roret. pp. 637 pp.
  3. Wibmer, G. J.; O’Brien, C. W. (1986). "Annotated checklist of the weevils (Curculionidae sensu lato) of South America (Coleoptera: Curculionoidea)". Memoirs of the American Entomological Institute. 39: 1–563.
  4. Franz, Nico M. (2012). "Phylogenetic reassessment of the Exophthalmus genus complex (Curculionidae: Entiminae: Eustylini, Geonemini)". Zoological Journal of the Linnean Society. 164 (3): 510–557. doi:10.1111/j.1096-3642.2011.00774.x. ISSN 0024-4082.
  5. Franz, Nico M. (2009). "Redescriptions of critical type species in the Eustylini Lacordaire (Coleoptera: Curculionidae: Entiminae)". Journal of Natural History. 44 (1–2): 41–80. doi:10.1080/00222930903383495. ISSN 0022-2933. S2CID 3579230.
  6. Girón, Jennifer C. (2020). "Status of knowledge of the broad-nosed weevils of Colombia (Coleoptera, Curculionidae, Entiminae)". Neotropical Biology and Conservation. 15 (4): 583–674. doi:10.3897/neotropical.15.e59713. ISSN 2236-3777. S2CID 231708108.
  7. O’Brien, C.W.; Wibmer, G.J. (1982). "Annotated checklist of the weevils (Curculionidae sensu lato) of North America, Central America, and the West Indies (Coleoptera: Curculionoidea)". Memoirs of the American Entomological Institute. 34: 1–382.
  8. LeConte, John L.; Horn, George H. (1876). "The Rhynchophora of America, North of Mexico". Proceedings of the American Philosophical Society. 15 (96): vii–442. ISSN 0003-049X. JSTOR 982412.
  9. Kuschel, G. (1955). "Nuevas sinonimias y anotaciones sobre Curculionoidea" (PDF). Revista Chilena de Entomología. 4: 261–312.
  10. Schönherr, C. J.; Boheman, C. H.; Fåhraeus, Olof Immanuel; Gyllenhal, L. (1845). Genera et species Curculionidum, cum synonymia hujus familae species novæ. Vol. 8. Paris: Roret. p. 504.
  11. Sharp, D.; Champion, G.C. (1911). Biologia Centrali-Americana. Insecta. Coleoptera. Volume 4. part 3. Rhynchophora. Curculionidae. London: R. H. Porter. pp. 354 pp. + 15 pl.
  12. Anderson, Robert S.; Lanteri, Analia A. (2000). "New genera and species of weevils from the Galapagos Islands, Ecuador, and Cocos Island, Costa Rica (Coleoptera; Curculionidae; Entiminae; Entimini)". American Museum Novitates (3299): 1–15. doi:10.1206/0003-0082(2000)299<0001:NGASOW>2.0.CO;2. ISSN 0003-0082. S2CID 55544499.
  13. Schönherr, C. J. (1823). Curculionides [Tabula synoptica familiae Curculionidum]. Jena: Isis von Oken. pp. 1132–1146.
  14. Schönherr, C.J. (1842). Genera et species Curculionidum, cum synonymia hujus familiae. Species novae aut hactenus minus cognitae, descriptionibus a Dom. Leonardo Gyllenhal, C. H. Boheman, et entomologis aliis illustratae, tomus sextus, pars secunda. Paris: Roret. pp. 495 pp.
  15. Pascoe, Francis P. (1881-01-01). "VI.—New neotropical Curculionidæ.—Part IV". Annals and Magazine of Natural History. 7 (37): 38–45. doi:10.1080/00222938109459470. ISSN 0374-5481.
  16. Schönherr, C.J. (1826). IV Curculionidum dispositio methodica cum generum characteribus, descriptionibus atque observationibus variis seu Prodromus ad Synonymiae Insectorum. Lipsiae: Apud Fridericum Fleischer.
  17. Sahlberg, C.R. (1823). Periculi entomographici, species insectorum nondum descriptas proposituri, fasciculus. Aboae: Frenckel. pp. 82 pp.
  18. Chevrolat, L.A.A. (1878). "(donne la description d'un genre de Curculionidae)". Annales de la Société Entomologique de France. Cinquième Série. Tome huitième: IX–X.
  19. Faust, J. (1892). "Reise von E. Simon in Venezuela. Curculionidae. Pars prima". Stettiner Entomologische Zeitung. 53: 1–44.
  20. Schönherr, C.J. (1847). Mantissa secunda familiae curculionidum. Seu descriptiones novorum quorundam generum curculionidum. Holmiae: Typis Norstedt et filii. pp. 86 pp.
  21. Labram, J. David.; Imhoff, L. (1838). Singulorum Generum Curculionidum unam Alteramve speciem additis iconibus a David Labram ad Naturam Delineatis illustravit L. Imhoff. Die Gattung der Rüsselkäfer erlautert ... Basel: Schweighauser'sche Buchh. p. 598.
  22. Marshall, Guy A. K. (1922). "VI. On New Genera and Species of Neotropical Curculionidae". Transactions of the Royal Entomological Society of London. 70 (1–2): 181–224. doi:10.1111/j.1365-2311.1922.tb02830.x. ISSN 1365-2311.


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