Malthodini
Böving & Craighead, 1931
Genus Guides
2Malthodini is a tribe of soldier beetles within the Malthininae. The tribe contains both extant and fossil , with the oldest confirmed record being the extinct *Archaeomalthodes* from 99-million-year-old Upper Cretaceous Burmese amber. This fossil discovery represents the oldest documented occurrence of the subfamily Malthininae, indicating the tribe's origins extend to at least the Late Cretaceous.
Pronunciation
How to pronounce Malthodini: //mælˈθoʊdɪnaɪ//
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Identification
Members of Malthodini can be distinguished from other Malthininae tribes by morphological features shared with the *Malthodes*, including body proportions and structural characteristics of the and pronotum. The extinct genus *Archaeomalthodes* shows morphological similarity to modern malthodines, supporting tribal placement.
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Distribution
Extant occur in regions where modern *Malthodes* and related are found. Fossil evidence confirms presence in the Northern Myanmar (Kachin) region during the Late Cretaceous, approximately 99 million years ago.
Behavior
Flower-visiting has been inferred for the fossil *Archaeomalthodes rosetta* based on morphological similarity to modern malthodines and the presence of angiosperms in the Burmese amber deposits. This inference remains speculative pending direct behavioral evidence.
Human Relevance
The discovery of *Archaeomalthodes rosetta* has been described as a 'Rosetta Stone' for understanding ancient soldier beetle evolution, providing key information for interpreting the early diversification of Cantharidae.
Similar Taxa
- Other Malthininae tribesMalthodini is distinguished by morphological alignment with *Malthodes*; other tribes within the lack this specific combination of features.
More Details
Fossil significance
Malthininae comprises the majority of described fossil cantharids, with Malthodini represented by *Archaeomalthodes rosetta* from Upper Cretaceous Burmese amber. This suggests the —and by extension the tribe—may have been considerably diverse during early Cantharidae evolution.
Nomenclatural note
The name *Archaeomalthodes* explicitly references the modern genus *Malthodes*, indicating the perceived phylogenetic relationship between the Cretaceous fossil and extant members of the tribe.