Trigonopterus

Taxonavigation

Ordo: Coleoptera
Familia: Curculionidae
Subfamilia: Cryptorhynchinae
Tribus: Cryptorhynchini
Genus: Trigonopterus

Name

Trigonopterus Fauvel, 1862 Wikispecies

Type species

Trigonopterus insignis Fauvel, 1862, by monotypy

Synonyms

Trigonus C.A.A. Fauvel, 1867 [unnecessary replacement name for Trigonopterus C.A.A. Fauvel, 1862]
Idotasia Pascoe, 1871
Eurysia Pascoe, 1885
Mimidotasia Voss, 1960
Microgymnapterus Voss, 1960

Introduction

Trigonopterus is a is a genus of flightless weevils distributed in the area between Sumatra, Samoa, the Philippines, and New Caledonia. It is found in primary tropical forests, both on foliage and edaphic in the litter layer. Currently, there exist about 444 described species, but many more await discovery (Riedel, 2010). The center of its diversity appears to be New Guinea where 51 or more species can be found in a single locality (Riedel et al., 2010). A further radiation took place in Sulawesi where more than 103 species are found (Riedel & Narakusumo, 2019). Many species are very similar to each other, but male genital characters and DNA barcoding allow a safe identification.

Diagnosis

The majority of species have a largely unclothed body, without dense vestiture. This is rather unusual among Cryptorhynchinae although exceptions occur on both sides.

For a positive diagnosis of Trigonopterus, the presence of the following character states is required:

Mesothoracic receptacle deep, posteriorly closed.

Wings absent

Scutellum completely absent externally

Elytra interlocked

Metanepisternum absent

Metathoracic spiracle located externally at the side of metaventrite

Lateral aspect of thorax of Semiathe puncticollis. Note metanepisternite between elytron and metaventrite.

Lateral aspect of thorax of Trigonopterus oblongus; note absence of metanepisternite; elytron touches metaventrite.

Tarsal claws minute

Metatarsus of Trigonopterus sp.. Note insertion of claw segment and small size of claws.

Metatarsus of Acalles camelus

Distribution

Australia, Fiji, Indonesia, Malaysia, New Caledonia, Papua New Guinea, Philippines, Samoa, Solomon Islands

Species

References

Fauvel, [C.A.]A. 1862: Coléoptères de la Nouvelle-Calédonie, recueillis par M. E. Déplanche, chirurgien de la marine impériale (1858-59-60). Bulletin de la Société Linnéenne de Normandie, 7: 120–185 + pl. IX–X.
Riedel, A. 2011: The weevil genus Trigonopterus Fauvel (Coleoptera, Curculionidae) and its synonyms – a taxonomic study on the species tied to its genus-group names. Zootaxa, 2977: 1–49. Preview
Riedel, A. 2010: One of a thousand - a new species of Trigonopterus (Coleoptera, Curculionidae, Cryptorhynchinae) from New Guinea. Zootaxa, 2403: 59–68. Preview
Riedel, A., Daawia D., Balke, M. 2010: Deep cox1 divergence and hyperdiversity of Trigonopterus weevils in a New Guinea mountain range (Coleoptera, Curculionidae) Zoologica Scripta 39 (1): 63–74. Abstract
Riedel, A., Sagata, K., Surbakti, S., Tänzler, R., Balke, M. 2013: One hundred and one new species of Trigonopterus weevils from New Guinea ZooKeys, 280: 1-150. doi
Riedel, A., Narakusumo, R.P. 2019: One hundred and three new species of Trigonopterus weevils from Sulawesi. ZooKeys, 828: 1–153. doi
Riedel, A., Tänzler, R., Balke, M., Rahmadi, C., Suhardjono, Y.R. 2014: Ninety-eight new species of Trigonopterus weevils from Sundaland and the Lesser Sunda Islands. ZooKeys, 467: 1–162. doi
van de Kamp, T., Cecilia, A., dos Santos Rolo, T., Vagovič, P., Baumbach, T., & Riedel, A. 2015: Comparative thorax morphology of death-feigning flightless cryptorhynchine weevils (Coleoptera: Curculionidae) based on 3D reconstructions. Arthropod Structure & Development 44: 509–523. doi
Riedel, A; Tänzler, R; 2016: Revision of the Australian species of the weevil genus Trigonopterus Fauvel ZooKeys, (556): 97-162. doi
Van Dam, M., Laufa R., Riedel A. 2016: Four new species of Trigonopterus Fauvel from the island of New Britain (Coleoptera, Curculionidae). ZooKeys, 582: 129–141. doi

Trigonopterus

Contents

Taxonavigation

Name

Type species

Synonyms

Introduction

Diagnosis

Distribution

Species

References

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