Spintherophyta globosa
(Olivier, 1808)
Brassy Ball Leaf Beetle
Spintherophyta globosa is a small leaf beetle in the Chrysomelidae, Eumolpinae. It is the most widespread and commonly encountered of the four North American Spintherophyta , occurring across eastern North America from the Atlantic coast to the Rocky Mountains. The species is characterized by its distinctly rounded, globular body shape and contrasting coloration. It has been reported to be , feeding on multiple plant species.
Pronunciation
How to pronounce Spintherophyta globosa: //spɪnˈθɛr.oʊ.faɪ.tə ɡloʊˈboʊ.sə//
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Identification
The combination of small size, strongly rounded globose body, and red-orange legs and against a dark body distinguishes this . In North America, it is the only widespread Spintherophyta species; the other three North American species have more restricted distributions. The Spintherophyta belongs to Eumolpinae, which contains many small, globular leaf beetles; separation from related genera requires examination of subtle morphological characters. The coppery pronotum mentioned for some Spintherophyta species is not noted as diagnostic for S. globosa specifically.
Images
Appearance
Body distinctly globose (rounded, ball-like) and compact. Coloration black to dark brown on the surface, with legs, , and mouthparts bright red-orange. Small size, typical of Eumolpinae. The rounded body form is the source of both the specific epithet 'globosa' and the 'Brassy Ball Leaf Beetle'.
Habitat
Specific details are not well documented. As a leaf beetle, it likely occurs in a variety of vegetated habitats supporting its plants. Related observations of Spintherophyta in Argentina note feeding in flowers of malvaceous plants, but whether S. globosa exhibits similar floral feeding is not established.
Distribution
Widespread east of the Rocky Mountains in North America, ranging from the Atlantic coast west to Colorado and western Texas. Possible occurrence in Arizona and Mexico. The is the most broadly distributed of the four North American Spintherophyta species. GBIF records also indicate presence in Colombia (Valle del Cauca), though this may represent misidentification or introduced .
Diet
Reported to be , feeding on multiple plant . Specific plants are not documented in available sources.
Similar Taxa
- Other Spintherophyta species (North America)Three other Spintherophyta occur in North America but have more restricted distributions; S. globosa is the only widespread member of the in this region
- Eumolpinae genera (general)Many Eumolpinae share the small, globular body form; precise identification to and requires careful morphological examination
More Details
Taxonomic context
The Spintherophyta is much more diverse in the Neotropics than in North America. While only four occur north of Mexico, Blackwelder (1946) listed 71 species for the Neotropical region. This disparity makes identification of tropical specimens particularly challenging.