Características do adulto, genitália e formas imaturas de Gonipterus gibberus Boisduval e G. scutellatus Gyllenhal (Coleoptera, Curculionidae)

Rosado-Neto, Germano Henrique; Marques, Marinêz Isaac

doi:10.1590/s0101-81751996000100007

Cited by 16 publications

(19 citation statements)

References 5 publications

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“…On the basis of the aedeagal features of the holotypes of G. exaratus and G. gibberus , these two species do not belong to the G. scutellatus complex either and are thus also not conspecific with G. scutellatus ; the species regarded as G. gibberus in South America (e.g. by Rosado‐Neto & Marques 1996) proved to be G. pulverulentus . The two remaining types of aedeagi with a square apex found thus far were not represented in the material examined in this study; one of them represents G .…”

Section: Resultsmentioning

confidence: 96%

“…For morphological discrimination of species and identification of specimens, sequenced and other specimens were dissected and their genitalia cleared for study. Rosado‐Neto and Marques (1996) described and illustrated a number of differences in male and female genitalia between the two Gonipterus species recorded from South America, but examination of long series of all described Gonipterus species (R. Oberprieler unpubl. data) revealed that only the structure of the internal sclerite(s) of the aedeagus in the males varies distinctively and consistently between the species, whereas differences in the female genitalia are too subtle and variable to permit discrimination of the species.…”

Section: Methodsmentioning

confidence: 99%

“…The identification of Eucalyptus Weevil had been problematical from its first appearance in South Africa in 1916, where, after numerous different opinions by various experts of the time, its identity was finally settled as being G. scutellatus (Mally 1924; Tooke 1953). Several other species names were later synonymised with it (Wibmer & O'Brien 1986; Zimmerman 1994), including that of G. gibberus Boisduval, 1835 which had always been treated as a distinct species in South America, specifically so on differences in the genitalia (Vidal Sarmiento 1955; Rosado‐Neto & Marques 1996). One of the authors of the present study (RGO) commenced taxonomic studies of the Gonipterini in Australia in 2003, which confirmed that differences in certain features of the male genitalia are indeed species‐diagnostic in Gonipterus , specifically the structure of the complex sclerite(s) situated inside the aedeagus in repose and extruded during copulation (Fig.…”

Section: Introductionmentioning

confidence: 99%

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Identification and molecular phylogenetics of the cryptic species of the Gonipterus scutellatus complex (Coleoptera: Curculionidae: Gonipterini)

Mapondera

Burgess

Matsuki

et al. 2012

Australian Journal of Entomology

168

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The Eucalyptus Weevil, generally referred to as Gonipterus scutellatus Gyllenhal, 1833 is a significant pest of Eucalyptus species in Africa, America, Europe and New Zealand. It has recently become a pest of Eucalyptus globulus plantations in Western Australia, despite the presence there of the mymarid egg‐parasitoid Anaphes nitens (Girault). Recent taxonomic study has indicated G. scutellatus to comprise a complex of cryptic species, obscuring the identity of the various pest populations of the weevil in the world. We examined (1) whether the apparent cryptic species identifiable on genital differences have a genetic basis; (2) the distribution of these species; and (3) the origin of the population in Western Australia. We studied specimens from across the distribution range of Eucalyptus Weevil in Australia and obtained sequences of three genes from them: cytochrome oxidase I mtDNA, elongation‐factor 1‐α nuclear DNA and 18s rDNA. The cladogram of COI haplotypes resolved 10 well supported clades fully corresponding with genital‐morphologically distinct species, eight of them constituting a monophyletic G. scutellatus complex. Only four of these species proved to be described, as G. balteatusLea, 1897G. platensis (Marelli, 1926), G. pulverulentusLea, 1897 and G. scutellatus Gyllenhal, 1833. The pest species in the world were found to be G. platensis (New Zealand, America, western Europe), G. pulverulentus (eastern South America) and an undescribed species (Africa, France, Italy). The population of G. platensis in Western Australia showed little genetic variation and is indicated to be a recent introduction from Tasmania. The discrimination of the cryptic species of the G. scutellatus complex enables improvements in the management of the pest species in terms of biological control and plantation practices. Our study highlights the critical importance of proper taxonomic studies underpinning biocontrol programs.

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Section: Resultsmentioning

confidence: 96%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Identification and molecular phylogenetics of the cryptic species of the Gonipterus scutellatus complex (Coleoptera: Curculionidae: Gonipterini)

Mapondera

Burgess

Matsuki

et al. 2012

Australian Journal of Entomology

168

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“…n. 2) in Africa and Italy, which is closer to G. scutellatus and also to G. balteatus Pascoe. This relationship is also borne out by the male genitalia; the differences in the copulatory sclerite between G. platensis and G. pulverulentus (as illustrated by Rosado-Neto and Marques [69]) and Gonipterus sp. n. 2 are distinct and very consistent.…”

Section: Case Study: Anaphes Nitens (Girault) For Biological Control mentioning

confidence: 96%

“…Tooke [57] eventually settled on the name G. scutellatus for the weevil in South Africa, and this name was accepted in other countries as well, especially after the name G. platensis was synonymised with G. scutellatus [67] and later also the names G. gibberus, G. exaratus and G. notographus [68]. Only Rosado-Neto and Marques [69] did not agree, drawing attention to differences in the male genitalia of the Gonipterus weevils in Argentina (detected and illustrated before by Vidal Sarmiento [70]) and recognising two species in South America, named G. gibberus and G. scutellatus.…”

Section: Case Study: Anaphes Nitens (Girault) For Biological Control mentioning

confidence: 99%

Weevils as Targets for Biological Control, and the Importance of Taxonomy and Phylogeny for Efficacy and Biosafety

2018

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Curculionidae are a large mainly herbivorous family of beetles, some of which have become crop pests. Classical biological control has been attempted for about 38 species in 19 genera, and at least moderate success has been achieved in 31 % of cases. Only two weevil species have been considered to be completely controlled by a biological control agent. Success depends upon accurately matching natural enemies with their hosts, and hence taxonomy and phylogeny play a critical role. These factors are discussed and illustrated with two case studies: the introduction of the braconid parasitoid Mictroctonus aethiopoides into New Zealand for biological control of the lucerne pest Sitona discoideus, a case of complex phylogenetic relationships that challenged the prediction of potential non-target hosts, and the use of a mymarid egg parasitoid, Anaphes nitens, to control species of the eucalypt weevil genus Gonipterus, which involves failure to match up parasitoids with the right target amongst a complex of very closely related species. We discuss the increasing importance of molecular methods to support biological control programmes and the essential role of these emerging technologies for improving our understanding of this very large and complex family.

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Presence of the Eucalyptus snout beetle in Ecuador and potential invasion risk in South America

Crespo‐Pérez,

Soto‐Centeno,

Pinto

et al. 2023

Ecology and Evolution

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Eucalyptus snout beetles are a complex of at least eight cryptic species (Curculionidae: Gonipterus scutellatus complex), native to mainland Australia and Tasmania, that defoliate Eucalyptus trees and are considered important pests. Since the 19th century, three species of the complex have been introduced to other continents. Here, we document the presence of Eucalyptus snout beetles in Ecuador. We used DNA data for species identification and unambiguously demonstrated that the Ecuadorian specimens belong to the species Gonipterus platensis, which has low genetic diversity compared with other species in the complex. We analyzed G. platensis' potential distribution in South America with ecological niche models and found several areas of high to intermediate climatic suitability, even in countries where the pest has not been registered, like Peru and Bolivia. Accurate identification of species in the G. scutellatus complex and understanding of their potential distribution are essential tools for improved management and prevention tactics.

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Características do adulto, genitália e formas imaturas de Gonipterus gibberus Boisduval e G. scutellatus Gyllenhal (Coleoptera, Curculionidae)

Cited by 16 publications

References 5 publications

Identification and molecular phylogenetics of the cryptic species of the Gonipterus scutellatus complex (Coleoptera: Curculionidae: Gonipterini)

Identification and molecular phylogenetics of the cryptic species of the Gonipterus scutellatus complex (Coleoptera: Curculionidae: Gonipterini)

Weevils as Targets for Biological Control, and the Importance of Taxonomy and Phylogeny for Efficacy and Biosafety

Presence of the Eucalyptus snout beetle in Ecuador and potential invasion risk in South America

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