Cephalic-horns
Guides
Ceracis
tree-fungus beetles
Ceracis is a genus of minute tree-fungus beetles (family Ciidae) comprising approximately 56 described species. The genus is characterized by small body size, reduced antennal segmentation (typically 8-9 antennomeres), and pronounced sexual dimorphism in cephalic and pronotal armature. Species within the Ceracis furcifer group exhibit specialized feeding on the blood-red bracket fungus Pycnoporus sanguineus, representing a unique dietary specialization among animals. The genus has a predominantly Neotropical distribution, with records extending from South America through the Caribbean to the southern United States.
Megacerus
Large-horned Bruchids
Megacerus is a genus of seed beetles in the family Chrysomelidae, subfamily Bruchinae, commonly known as large-horned bruchids. The genus contains approximately nine described species in North America. Species in this genus are seed specialists, with larvae developing endophytically within seeds of host plants, primarily in the family Convolvulaceae. Adults are characterized by prominent genal or frontal horns, particularly in males. The genus has been studied for its potential use in biological control of weedy bindweeds.
Pentodontini
rhinoceros beetles
Pentodontini is the most diverse tribe within the subfamily Dynastinae (rhinoceros beetles), containing over 100 genera distributed across multiple biogeographic regions. Most genera are restricted to a single biogeographic region. The tribe is characterized by substantial morphological diversity, with generic-level identification often relying on mouthpart morphology in females and secondary sexual characters (horns, claw modifications, antennal club length) in males.
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