Deltochilini
Lacordaire, 1855
Genus Guides
6Deltochilini is a large tribe of dung beetles in the Scarabaeinae, comprising approximately 800 across 120 . Members exhibit substantial variation in size (2–33 mm) and body form. The tribe has undergone taxonomic revision, with Deltochilini restored as the valid name over the junior synonym Canthonini. Despite historical classification based on morphological traits such as reduced tibial , these characteristics have limited phylogenetic support.
Pronunciation
How to pronounce Deltochilini: /dɛltoʊˈkɪlɪnaɪ/
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Identification
Historically distinguished from other Scarabaeinae by having fewer than four teeth on the outer edges of the front tibiae. However, this trait has been found to lack phylogenetic validity, making reliable identification to tribe level difficult without molecular or detailed morphological analysis. The tribe encompasses diverse body forms, from compact ball-rollers to more elongate .
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Distribution
distribution with notable regional variation in diversity. Constitutes more than 35% of dung beetle in the Americas, Australia, Madagascar, and many islands. Represents less than 20% of genera in Afro-Eurasian regions.
Seasonality
Largely activity pattern.
Diet
Most are . Some species feed on carrion or fungi. Smaller species may utilize leaf litter (saprophagous).
Ecological Role
Nutrient cycling through consumption and burial of , carrion, and decaying organic matter.
Human Relevance
Contributes to services including removal and soil aeration in agricultural and natural landscapes.
Similar Taxa
- Other Scarabaeinae tribesDeltochilini was historically separated based on tibial , but this trait is not phylogenetically reliable; molecular data often necessary for definitive placement.
Misconceptions
The synonym Canthonini was proposed for preservation under ICZN Article 35.5 in 2006, but this was subsequently reversed because the Article does not apply when two names compete at the same taxonomic rank. Deltochilini is the valid senior name.
More Details
Taxonomic instability
The placement of several within Deltochilini is expected to change as phylogenetic relationships are clarified.
Evolutionary history
Members were thought to be derived from an ancient ball-rolling lineage, though the morphological basis for this hypothesis has been challenged.