Eurhynchinae

Eurhynchus scabrior, copyright Harvey Perkins.

Belongs within: Brentidae.

The Eurhynchinae are an Australasian group of weevils with poorly known biology (Zimmerman 1994).

Characters (from Zimmerman 1994): Antenna with loose club. Rostrum with narrow, shallow sulcus extending along junction between lateral and ventral surfaces of each side of rostrum from beneath anterior corner of eye to below antennal insertion. Mandibles strongly three-toothed. Labial palpi reduced, two-segmented, mostly concealed in sockets on sides of dorsal surface of labium. Maxillary palpi three-segmented. Gular suture single, extending from base to point beneath anterior ocular margin. Scutellum exposed. Prosternum short. Procoxal cavities confluent. Procoxae elongate, subconical, strongly exserted, proclinate armed with on anterior ventrolateral margins with prominent dentiform process. Prosternellum vertical, conspicuous. Notosternal suture strongly formed, extending “closed” vertically from coxa, thence turning at right angle and continuing to subapical constriction of prothorax. Mesocoxae reclinate, narrowly separated, only slightly protuberant. Elytron with internal subcostal plica well developed, its apical part curved towards suture well cephalad of elytral apex. Dorsal base of femur extending over trochanter to reach coxa. Apices of tibiae armed with movable spurs, formula 1-2-2; apex of protibia forming conspicuous, concave antennal cleaner. Abdominal tergites pigmented. Suture between first and second abdominal ventrites complete, deeply and coarsely impressed. Membrane surrounding ovipositor with long sclerotised bar on each side.

<==Eurhynchinae [Eurhininae, Eurhynchidae, Eurhynchides, Eurhynchini]B14
    |--Orapaeus cretaceusB14, LB20
    |--Ctenaphides Pascoe 1870Z94
    |    |--*C. porcellus Pascoe 1870 [=Eurhynchus porcellus]Z94
    |    `--C. maculatus (Pascoe 1873) [=Eurhynchus maculatus, Eurhinus maculatus; incl. C. gymnostictus Lea 1907]Z94
    |--Aporhina Boisduval 1835 [incl. Chalcocybebus Snellen van Vollenhoven 1866]Z94
    |    |--*A. bispinosa Boisduval 1835 [=Eurhynchus bispinosus, A. spinosa (l. c.)]Z94
    |    |--‘Chalcocybebus’ alboguttatusZ94
    |    |--A. australis (Heller 1896) (see below for synonymy)Z94
    |    |--*Chalcocybebus’ nitens Snellen van Vollenhoven 1866Z94
    |    `--A. splendida (Blackburn 1894) [=Eurhynchus splendidus, Chalcocybebus splendidus]Z94
    `--Eurhynchus Kirby in Kirby & Spence 1828 [=Eurhinus Kirby 1819 non Illiger 1807, Eurhynus]Z94
         |--*E. scabrior (Kirby 1819) [=Eurhinus scabrior]Z94
         |--E. acanthopterus Boisduval 1835 (see below for synonymy)Z94
         |--‘Rhynchaenus’ bidensB35
         |--E. laevior (Kirby 1819) [=Eurhinus laevior; incl. Eurhinus muricatus Kirby 1819, Eurhynchus muricatus]Z94
         |--E. quadridens Erichson 1842M86
         `--E. quadrituberculatus Boheman 1839 [incl. E. quadrinodosus Erichson 1842]Z94

Aporhina australis (Heller 1896) [=Chalcocybebus bispinosus australis, Chalcocyhelus (l. c.) australis, Eurhynchus australis]Z94

Eurhynchus acanthopterus Boisduval 1835 [incl. Eurhynchus bellicosus Blanchard 1859, Eurhinus fulvofasciatus Blanchard 1840, Eurhynchus scapularis Pascoe 1870, Eurhynchus tetracanthus]Z94

*Type species of generic name indicated

References

[B35] Boisduval, J. B. 1835. Voyage de Découvertes de l’Astrolabe. Exécuté par ordre du Roi, pendant les années 1826–1827–1828–1829, sous le commandement de M. J. Dumont d’Urville. Faune entomologique de l’océan Pacifique, avec l’illustration des insectes nouveaux recueillis pendant le voyage vol. 2. Coléoptères et autres ordres. J. Tastu: Paris.

[B14] Bouchard, P. (ed.) 2014. The Book of Beetles: A lifesize guide to six hundred of nature’s gems. Ivy Press: Lewes (United Kingdom).

[LB20] Letsch, H., M. Balke, E. F. A. Toussaint & A. Riedel. 2020. Historical biogeography of the hyperdiverse hidden snout weevils (Coleoptera, Curculionidae, Cryptorhynchinae). Systematic Entomology 45: 312–326.

[M86] Masters, G. 1886. Catalogue of the described Coleoptera of Australia. Part V. Proceedings of the Linnean Society of New South Wales, series 2, 1 (3): 585–686.

[Z94] Zimmerman, E. C. 1994. Australian Weevils (Coleoptera: Curculionoidea) vol. 2. Brentidae, Eurhynchidae, Apionidae and a chapter on immature stages by Brenda May. CSIRO Australia.

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