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The morphology of the preimaginal stages of Cleopomiarusmicros (Germar, 1821) (Curculionidae, Coleoptera) and notes on its biology.

ABSTRACT: As yet little is known of the bionomics of weevils of the genus Cleopomiarus Pierce, 1919; current knowledge is limited to data on the morphology and biology of the preimaginal stages of certain species. This paper includes original information on the life cycle of Cleopomiarusmicros (Germar, 1821). It presents the morphology of the egg, last larva (L3) and pupa. Data on the host plant (Jasionemontana L.) and breeding plant (Campanulapatula L.) and on the oviposition and phenology of the species are updated. The anatomy of the third-stage larva of C.micros shares certain traits with other species of the tribe Mecinini Gistel, 1848. Comparison of the morphology of preimaginal stages of C.micros with those previously described for other species of the genera Cleopomiarus and Miarus Schönherr, 1826 - previously considered the same genus - reveals species differences in larval body length, colour of the body and epicranium, and chaetotaxy of head and body.

SUBMITTER: Szwaj E

PROVIDER: S-EPMC6262059 | biostudies-other | 2018

REPOSITORIES: biostudies-other

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The morphology of the preimaginal stages of Cleopomiarusmicros (Germar, 1821) (Curculionidae, Coleoptera) and notes on its biology.

Szwaj Ewelina E Łętowski Jacek J Pawlęga Krzysztof K

ZooKeys 20181121 798

As yet little is known of the bionomics of weevils of the genus Cleopomiarus Pierce, 1919; current knowledge is limited to data on the morphology and biology of the preimaginal stages of certain species. This paper includes original information on the life cycle of Cleopomiarusmicros (Germar, 1821). It presents the morphology of the egg, last larva (L3) and pupa. Data on the host plant (Jasionemontana L.) and breeding plant (Campanulapatula L.) and on the o ...[more]

PMID: 30510465

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Project description:The ambrosia beetle Xyleborus volvulus Fabricius has been reported as a potential vector of the plant pathogen Raffaelea lauricola T.C. Harr., Fraedrich & Aghayeva that is affecting avocado orchards in South Florida. In this study, we examined its life cycle, process of gallery formation, gallery structure, and fungal associates by rearing one generation on avocado sawdust medium under control conditions. The adult foundress excavated a vertical tunnel that constituted the main gallery with a length of 2.5?cm, followed by the construction of up to six secondary galleries with a total length of 4.4?cm. The time period for one generation (egg to adult) was 28?days. Teneral males emerged 3 days after the emergence of the first females. The F1 generation did not significantly contribute to gallery expansion. Four species of Raffaelea and nine yeast species were recovered from galleries and beetles. Raffaelea arxii and Candida berthetii were the most frequent symbionts recovered from new adults and galleries. Candida berthetii dominated during the early stages of the gallery development, whereas R. arxii was most frequent in later stages. Other Raffaelea species were inconsistently isolated from galleries, which suggests a strong association between Xyleborus volvulus and both R. arxii and C. berthetii These results suggest that R. arxii is the primary nutritional symbiont of X. volvulus and that yeast species may be pioneer colonizers that assist with the growth of fungal symbionts.IMPORTANCE Ambrosia beetles cultivate fungi in tunnels bored into weakened host trees. This obligate interaction is required for their survival as beetles feed on these symbiotic fungi, and the fungi benefit from transportation by the beetles. Xyleborus volvulus carries many nonpathogenic symbionts; however, recently the acquisition of Raffaelea lauricola (the causal agent of a lethal vascular disease of lauraceous trees) by this beetle has altered its status from wood degrader to potential pest in avocado. We conducted a study to understand the relationship of this beetle and its fungal associates. Our results show that X. volvulus has a multipartite flexible association with different Raffaelea species. The lack of fidelity in the mutualistic association may explain the acquisition of R. lauricola Knowing the beetle biology and its mutualistic interactions furthers an understanding of the beetle's role as a potential vector and in disease transmission.

Dataset Information

The morphology of the preimaginal stages of Cleopomiarusmicros (Germar, 1821) (Curculionidae, Coleoptera) and notes on its biology.

Publications

The morphology of the preimaginal stages of <i>Cleopomiarusmicros</i> (Germar, 1821) (Curculionidae, Coleoptera) and notes on its biology.

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