Spintherophyta arizonensis
Schultz, 1976
Spintherophyta arizonensis is a small in the , Eumolpinae, described by Schultz in 1976. The Spintherophyta is most diverse in the Neotropics, with only four occurring in North America north of Mexico. This species is one of the North representatives of a predominantly Neotropical genus of globular, pollen-feeding leaf beetles.
Pronunciation
How to pronounce Spintherophyta arizonensis: /spɪnˌθɛrəˈfaɪtə ˌærɪzoʊˈnɛnsɪs/
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Identification
Members of the Spintherophyta can be distinguished from similar globular by their small size (typically 2–4 mm), rounded body shape, and association with flowers. In North America, S. arizonensis can be separated from the more widespread S. globosa by geographic distribution and subtle morphological differences, though precise diagnostic characters require examination. The genus is often confused with Chrysomelinae due to shared globular shape, but Eumolpinae members are generally smaller.
Distribution
Known from Arizona and adjacent regions of the southwestern United States. The specific epithet "arizonensis" indicates the locality. The as a whole reaches its greatest diversity in the Neotropics.
Similar Taxa
- Spintherophyta globosaThe only other widespread and commonly encountered Spintherophyta in North America; distinguished by broader distribution and subtle morphological differences
- Chrysomelinae (subfamily)Shares globular body shape but members are typically larger; Eumolpinae placement confirmed by additional characters including size and antennal structure
More Details
Taxonomic context
The Spintherophyta was revised for North America north of Mexico by Schultz (1976), who recognized four . Blackwelder (1946) listed 71 species for the Neotropics, indicating the explosive diversity of this genus in tropical regions. Identification of many Neotropical species remains challenging and often requires association with plants or geographic data.