Calyptomenidae: The Unique Family of Broadbills
The Calyptomenidae are a distinct family of passerine birds—perching birds characterized by their specific foot structure—distributed across Africa, the Malay Peninsula, and Borneo. While they share a common name with other broadbills, these birds possess a unique evolutionary history that sets them apart from their relatives.
Key Facts
- Family Name: Calyptomenidae.
- Species Count: Six living species divided into two genera.
- Distribution: Found in Africa, Borneo, and the Malay Peninsula.
- Classification: Part of the infraorder Eurylaimides within the order Passeriformes.
- Taxonomic Shift: Separated from the Eurylaimidae family following a 2006 molecular study.
Taxonomic History and Classification
For many years, the species now belonging to Calyptomenidae were classified under the broader broadbill family, Eurylaimidae. However, scientific understanding evolved with the advent of genetic testing.
A molecular phylogenetic study—an analysis of evolutionary relationships using DNA—published in 2006 revealed that the species in the Smithornis and Calyptomena genera were not closely related to other broadbills. As a result, these birds were moved into their own separate family, Calyptomenidae, to accurately reflect their biological lineage.
Genera and Species
The family is currently organized into two distinct genera, each containing three species.
Genus Smithornis
The Smithornis genus includes species primarily found in Africa. These include the African broadbill (Smithornis capensis), the Grey-headed broadbill (Smithornis sharpei), and the Rufous-sided broadbill (Smithornis rufolateralis).
Genus Calyptomena
The Calyptomena genus consists of species located in Southeast Asia. This group includes the Green broadbill (Calyptomena viridis), Hose's broadbill (Calyptomena hosii), and Whitehead's broadbill (Calyptomena whiteheadi).
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Summary of Calyptomenidae Species
| Genus | Species Name | Common Name |
|---|---|---|
| Smithornis | Smithornis capensis | African broadbill |
| Smithornis sharpei | Grey-headed broadbill | |
| Smithornis rufolateralis | Rufous-sided broadbill | |
| Calyptomena | Calyptomena viridis | Green broadbill |
| Calyptomena hosii | Hose's broadbill | |
| Calyptomena whiteheadi | Whitehead's broadbill |
Frequently Asked Questions
Where are Calyptomenidae birds found?
These birds are distributed across Africa, the Malay Peninsula, and Borneo.
How many species are in the Calyptomenidae family?
There are six living species divided between two genera: Smithornis and Calyptomena.
Why were these birds moved to a separate family?
A 2006 molecular phylogenetic study found that they were not closely related to the other broadbills in the Eurylaimidae family, necessitating a new classification.
Which genus contains the Green broadbill?
The Green broadbill (Calyptomena viridis) belongs to the genus Calyptomena.
What is the scientific classification of Calyptomenidae?
They belong to the Kingdom Animalia, Phylum Chordata, Class Aves, Order Passeriformes, and Infraorder Eurylaimides.