Tanymecini

Lacordaire, 1863

broad-nosed weevils

Tanymecini is a tribe of broad-nosed within the Entiminae (). The tribe contains numerous distributed across subtribes including Piazomiina, Tainophthalmina, and Tanymecina, with additional genera currently classified as incertae sedis. Members exhibit considerable morphological and ecological diversity, with documented associations with plants in Chenopodiaceae and other . Some are recognized agricultural pests, while others have been investigated for applications.

Pandeleteius nodifer by (c) Sandra H Statner, some rights reserved (CC BY), uploaded by Sandra H Statner. Used under a CC-BY license.Pandeleteius nodifer by (c) Sam Kieschnick, some rights reserved (CC BY), uploaded by Sam Kieschnick. Used under a CC-BY license.Pandeleteius nodifer by (c) Sam Kieschnick, some rights reserved (CC BY), uploaded by Sam Kieschnick. Used under a CC-BY license.

Pronunciation

How to pronounce Tanymecini: //ˌtænɪˈmɛsɪˌnaɪ//

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Identification

Tanymecini are distinguished from other Entiminae tribes by combinations of rostral, antennal, and leg characters, though specific diagnostic features vary among subtribes. The tribe is broadly characterized as "broad-nosed" , referring to the relatively short, broad typical of Entiminae. -level identification requires examination of tarsal structure, elytral , and male .

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Habitat

varies considerably among . Documented occurrences include desert habitats where some to reach plants, steppe , and agricultural landscapes. Specific habitat associations are genus- or species-dependent rather than tribe-wide.

Distribution

Tanymecini has a broad geographic distribution with documented occurrences in: Turkey (Aras River valley), South America (Argentina, Bolivia, Brazil, Paraguay, Peru, Uruguay), and Spain (northeastern provinces). The tribe is represented on multiple continents, though precise global range boundaries remain incompletely documented.

Diet

Herbivorous. Documented associations include: Bassia hirsuta (Chenopodiaceae) for Tanymecus tenuis; Suaeda confusa (Chenopodiaceae) for Temnorhinus nasutus; Atriplex micrantha (Chenopodiaceae) for Temnorhinus hololeucus; Heliotropium europaeum (Boraginaceae) for Pachycerus segnis. Tanymecus dilaticollis has been observed feeding on maize.

Host Associations

  • Bassia hirsuta - for Tanymecus tenuis
  • Suaeda confusa - for Temnorhinus nasutus
  • Atriplex micrantha - for Temnorhinus hololeucus
  • Heliotropium europaeum - for Pachycerus segnis
  • Zea mays - for Tanymecus dilaticollis

Life Cycle

Pupal stage has been observed in a soil capsule constructed underground beneath the ; first documented for Entymetopus lineolatus and Asproparthenis steveni. Other and developmental details are - or -specific and not generalized across the tribe.

Behavior

Temnorhinus hololeucus has been observed to possess ability to reach plants in desert ; this represents a notable behavioral finding as related Cleonini are typically flightless. Flight capability varies among and within the tribe.

Ecological Role

Some function as agricultural pests; Tanymecus dilaticollis is noted as a maize . Related have been investigated for potential, such as Cyphocleonus achates against knapweed. The tribe contributes to diversity in steppe and desert .

Human Relevance

Agricultural pest status for certain , particularly Tanymecus dilaticollis on maize. Potential for applications in related .

Similar Taxa

  • CleoniniBoth are tribes within Entiminae with similar broad-nosed ; distinguished by tribal-level characters of and leg structure. Cleonini are typically flightless, whereas some Tanymecini (e.g., Temnorhinus hololeucus) possess ability.

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