Anomalini

Streubel, 1839

shining leaf chafers

Genus Guides

5

Anomalini is a large and diverse tribe of scarab beetles within the Rutelinae, commonly known as shining leaf chafers. The tribe comprises approximately 1,300 described worldwide, with significant representation across multiple biogeographical regions including the Palaearctic, Oriental, Ethiopian, Nearctic, and Neotropical regions. The tribe includes economically important pest species, particularly in agricultural settings, as well as numerous with restricted distributions. Members of Anomalini exhibit considerable morphological diversity, with diagnostic characters often concentrated in male genitalia structure and body sculpturing patterns.

Popillia japonica by no rights reserved, uploaded by bgirardot. Used under a CC0 license.Anomala by (c) Cheryl Stinchcomb, some rights reserved (CC BY), uploaded by Cheryl Stinchcomb. Used under a CC-BY license.Anomala delicata by (c) Sue Carnahan, some rights reserved (CC BY), uploaded by Sue Carnahan. Used under a CC-BY license.

Pronunciation

How to pronounce Anomalini: /ˌænəˈmɑːlɪnaɪ/

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Identification

Identification of Anomalini to tribe level relies on characters of the Rutelinae combined with tribal-level synapomorphies. Within Anomalini, -level identification typically requires examination of male genitalia, particularly the shape and orientation of parameres; genera with perpendicular parameres form a distinctive group. Somatic characters including body sculpturing, elytral patterns, pronotal punctation, and protarsal claw provide additional diagnostic features. -level identification often necessitates detailed examination of and structure, as well as patterns of elytral ridges and punctation. Geometric morphometric analysis of pronotal shape has proven effective for distinguishing cryptic species.

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Distribution

distribution spanning Palaearctic, Oriental, Ethiopian, Nearctic, and Neotropical biogeographical regions. High diversity in the circum-Mediterranean region, with the Eastern Mediterranean and Caucasus inferred as ancestral areas for several lineages. Significant Mexican documented, with multiple and subgenera restricted to this region. Present in wheat areas of Turkey, where surveys detected in multiple provinces. New World distribution includes Rica, with multiple new species described from this region.

Life Cycle

Larvae are scarabaeiform (C-shaped, white, with well-developed thoracic legs and a distinct capsule). Third instar larvae of European exhibit diagnostic differences in leg , last abdominal segment, and among . Larval morphology provides phylogenetically informative characters. Systematic position of some genera has been reassessed based on larval characteristics.

Human Relevance

Several constitute significant agricultural pests responsible for substantial crop losses in wheat areas worldwide. In Turkey, Anomalini beetles have been documented as pests in wheat fields, though densities in some surveyed regions were not considered high enough to cause economic damage. The subtribe Anisopliina within Anomalini is specifically associated with grasses (Poaceae), with species feeding on grass pollen.

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