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Argentine Masked Chafer

Cyclocephala signaticollis
Cascarudo Rubio
Coró-do-solo

Family: Scarabaeidae
Order: Coleoptera
Class: Insecta
Phylum / Division: Arthropoda
Kingdom: Animalia

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Records from Rafael Calzada

Other common names: Cascarudo del Suelo.


Description: It is a medium-sized beetle with a robust, oval body and smooth, convex elytra that give it a compact appearance. Overall coloration ranges from yellowish brown to chestnut, with the pronotum showing distinct darker markings, a diagnostic feature. The antennae end in a lamellate club, typical of scarab beetles, and the legs are strong, adapted for digging in the soil.

Geographic distribution: It is widely distributed in southern South America, with frequent records in Argentina, Uruguay, and southern Brazil. It is common in temperate and subtropical regions, especially in agricultural and livestock areas.

Habitat: It inhabits natural grasslands, cultivated fields, pastures, and rural landscapes, where loose soils favor larval development. Adults are also found in peri-urban environments, often attracted to artificial lights at night.

Diet: The larvae are root feeders, consuming roots of grasses and other plants, which can cause damage to crops and pastures when populations are high. Adults feed on plant material, pollen, and floral tissues, occasionally contributing to pollination.

Behavior: Adults are mainly nocturnal, with short, heavy flights. They are commonly seen around light sources, while during daylight hours they remain hidden in the soil or vegetation.

Reproduction: Reproduction is oviparous, with eggs laid in the soil. Development includes subterranean larval stages and a pupal stage also underground, resulting in a life cycle closely linked to soil and climatic conditions.

Conservation status: It is not currently listed under any global threat category. It is generally regarded as Not Evaluated or of Least Concern, although it is of agroecological importance due to the potential impact of its larvae on productive systems.


Author of this compilation: EcoRegistros – 15/12/2025




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Last published photographs

Foto
Photography ID: 479618
  Adult

Rafael Calzada
Buenos Aires
Argentina
01/17/2022
Luis Carlos De Volder



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Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
153589317/01/2022ArgentinaBuenos AiresCalle Lopez de Gomara entre Altamira e Intendente Gonzalez, Rafael CalzadaLuis Carlos De Volder
Page 1

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Citation recommended:

EcoRegistros. 2026. Argentine Masked Chafer (Cyclocephala signaticollis) - Species sheet. Acceded from https://www.ecoregistros.org on 09/03/2026.










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