Oxelytrum discicolle

(Brullé, 1836)

Oxelytrum discicolle is a carrion beetle distributed throughout the Neotropical region from Mexico to Argentina. It is one of the most commonly collected silphid beetles in studies in South America. The exhibits strictly activity patterns and shows strong preference for carcasses in advanced stages of decomposition. are attracted to decomposing vertebrate remains where they feed and likely reproduce.

Oxelytrum discicolle cropped by Diogo Luiz. Used under a CC BY-SA 4.0 license.

F6-2 Oxelytrum discicolle (4) by NHM Beetles and Bugs. Used under a CC BY 2.0 license.

F6-2 Oxelytrum discicolle by NHM Beetles and Bugs. Used under a CC BY 2.0 license.

Pronunciation

How to pronounce Oxelytrum discicolle: /ˌɒksɪˈlaɪtrəm dɪˈsɪkɒli/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

Members of the Oxelytrum can be distinguished from other Neotropical silphids by their relatively large size, elongate body form, and the characteristic structure of the . Specific characters for O. discicolle include the discal coloration pattern of the elytra (as suggested by the epithet "discicolle"). Accurate identification to species level requires examination of genitalic characters and comparison with type material, particularly given the morphological similarity among Oxelytrum species.

Images

Habitat

Open and forested in tropical and subtropical regions. Associated with decomposing vertebrate carcasses in terrestrial environments. In Brazil, has been collected in peri-urban forest settings.

Distribution

Mexico, Guatemala, Belize, El Salvador, Nicaragua, Rica, Panama, Colombia, Venezuela, Ecuador, Peru, Bolivia, Brazil, Paraguay, Uruguay, and Argentina. Records from Texas, USA are considered doubtful. The has been documented from specific localities including Socorro, San Gil, and Suaita in Colombia.

Seasonality

activity peaks during the rainy season in tropical regions. In Brazil, significantly higher abundance has been recorded during wet periods compared to dry seasons.

Diet

Carrion. feed on decomposing vertebrate tissue.

Life Cycle

Development occurs on carrion substrates. Specific details of larval development and are not documented in available sources.

Behavior

Strictly . are 17 times more abundant in night collections than day collections. Shows marked preference for carcasses in advanced stages of decomposition over fresh remains. Adults are attracted simultaneously to multiple decomposition stages when presented together.

Ecological Role

Carrion decomposer. Forensically important for estimating postmortem interval in the Neotropical region. Contributes to nutrient cycling through carcass decomposition.

Human Relevance

Significant forensic importance in South and Central America. Used as an in to estimate time since death based on patterns and developmental stage. Presence and abundance on cadavers can provide information about decomposition timeline and environmental conditions.

Similar Taxa

Other Oxelytrum speciesMorphologically similar occur in the same geographic range. Accurate identification requires examination of male genitalia and detailed comparison of elytral coloration patterns.
Other SilphidaeShares carrion association and general body plan with other carrion beetles. Distinguishable by combination of size, body shape, and Neotropical distribution.

More Details

Forensic significance

O. discicolle is among the most frequently cited silphid in literature for the Neotropical region. Its predictable and preference for advanced decomposition stages must be considered when interpreting forensic evidence.

Taxonomic note

placement has been inconsistent across databases. While NCBI and traditional treatments place this in Silphidae, some sources including GBIF and iNaturalist have listed it under Staphylinidae. This reflects ongoing taxonomic discussion regarding the classification of carrion beetles.