Forelius

Emery, 1888

Species Guides

2

Forelius is a of ants in the Dolichoderinae, distributed across the Neotropical region from the southern United States to Argentina. The genus comprises at least 18 described , including F. pruinosus, which has been documented as a native mutualist with plants and as a participant in ecological interactions with sea turtle nests. Species in this genus produce characteristic defensive secretions containing iridodial and iridomyrmecin.

Forelius pruinosus by (c) Sam Kieschnick, some rights reserved (CC BY), uploaded by Sam Kieschnick. Used under a CC-BY license.Forelius pruinosus by (c) Jake Nitta, some rights reserved (CC BY), uploaded by Jake Nitta. Used under a CC-BY license.Forelius pruinosus by (c) Jake Nitta, some rights reserved (CC BY), uploaded by Jake Nitta. Used under a CC-BY license.

Pronunciation

How to pronounce Forelius: /fɔˈreɪliəs/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

Forelius can be distinguished from other Dolichoderinae by their placement in the tribe Leptomyrmecini and their characteristic defensive chemistry. F. foetidus and F. pruinosus share iridodial and iridomyrmecin in their pygidial gland secretions, with F. foetidus additionally producing actinidine. Separation from the related Iridomyrmex is supported by chemosystematic and morphological data.

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Distribution

Neotropical region, ranging from the southern United States to Argentina.

Behavior

produce defensive secretions from the pygidial gland when disturbed. Forelius pruinosus has been observed visiting extrafloral and functioning as a food-for-protection mutualist with native plants, including Catalpa bignonioides.

Ecological Role

Native mutualist with native plants; Forelius pruinosus contributes to plant defense against herbivores and supports native ecological interactions. In coastal dune systems, F. pruinosus has been documented in sea turtle nests, where presence correlates with reduced hatchling success, though direct causality has not been established.

Human Relevance

Forelius pruinosus has been identified as a native in sea turtle conservation contexts on Georgia's barrier islands, where its presence in loggerhead sea turtle nests may affect hatchling . Management recommendations for sea turtle nest relocation include maintaining a 1-meter buffer from dune vegetation to reduce ant-related risks.

Similar Taxa

  • IridomyrmexFormerly included F. pruinosus (as I. pruinosus); distinguished by chemosystematic and morphological characters, though both share some defensive compounds
  • Solenopsis invicta contrasted with F. pruinosus in mutualism studies; S. invicta visits extrafloral less frequently and attacks beneficial insects, while F. pruinosus maintains more effective native mutualistic relationships

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