Molytinae

Schönherr, 1823

Genus Guides

Molytinae is a large and diverse of weevils (Curculionidae) described by Carl Johan Schönherr in 1823. The subfamily contains numerous tribes and distributed worldwide, with particularly high diversity in tropical and subtropical regions. Many Molytinae are associated with specific plants, including conifers, oaks, and various flowering plants. Some species are economically important as pests of forestry and agricultural crops, while others are restricted to specialized such as leaf litter, caves, or high-elevation . The subfamily has undergone significant taxonomic revision in recent decades, with many new species described particularly from Central America, Africa, and Asia.

Heilipus squamosus by (c) Dan Schofield, some rights reserved (CC BY), uploaded by Dan Schofield. Used under a CC-BY license.

Piazorhinus pictus by (c) Katja Schulz, some rights reserved (CC BY). Used under a CC-BY license.

Pronunciation

How to pronounce Molytinae: /mɒlɪˈtɪniː/

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Habitat

Molytinae occupy diverse including forests (coniferous, deciduous, and mixed), grasslands, alpine and subalpine , caves and subterranean environments, leaf litter, and agricultural systems. Many species show strong associations with specific plants or plant . High-elevation species are known from paramo and Afromontane forest ecosystems. Some are specialized for subterranean or cave-dwelling life, showing troglomorphic adaptations such as reduced .

Distribution

Worldwide distribution with centers of diversity in tropical and subtropical regions. Documented from North America (including southwestern U.S., Mexico, and Central America), South America (Ecuador, Brazil, Argentina), Europe (including Mediterranean region, Portugal, Italy, Montenegro, Romania), Africa (Tanzania, West Africa including São Tomé, Ivory Coast, Sierra Leone), Asia (Taiwan, Turkey), and the Canary Islands. Many show restricted local distributions and high .

Human Relevance

Some Molytinae are economically significant pests. Aclees taiwanensis, native to Taiwan, has been introduced to Europe (France, Italy, Slovenia, Poland) and recently recorded in Turkey, where it damages fig trees (Ficus carica) and other Ficus species. Conotrachelus quadrilineatus damages beans in South America. The includes of concern. Conversely, many species are restricted to natural and serve as indicators of health, particularly in old-growth forests and specialized habitats like caves.

Similar Taxa

CurculioninaeHistorically, several tribes now placed in other (including Bagoinae, Cryptorhynchinae, Hyperinae, Lixinae, Mesoptiliinae, and the tribe Itini) were treated as "tribus groups" within Molytinae in older classifications. These have since been elevated to separate subfamilies or transferred to Curculioninae.
CycloteriniThe Prothrombosternus was placed in Cycloterini, but its phylogenetic position within Molytinae remains untested and its placement is provisional.

More Details

Tribal composition

Molytinae includes multiple tribes, with significant taxonomic revision ongoing. The tribe Lymantini contains leaf-litter inhabiting such as Theognete, which shows remarkable local in Middle America with 94 described, 92 of them new to science in a 2010 revision. The tribe Anchonini shows transatlantic distribution patterns with genera in both Africa and the Americas. The tribe Orthorhinini includes genera associated with Araucaria such as Eurhamphus.

Subterranean adaptations

Several Molytinae lineages have independently evolved subterranean or cave-dwelling habits. The Baezia in the Canary Islands contains seven eyeless , six associated with caves and the mesovoid shallow substratum (hypogean environment) and one from soil (endogean environment). The genus Pseudoalaocybites includes microphthalmic species from high-elevation paramo . The genus Prothrombosternus from Tanzania is flightless and found in wet Afromontane forest leaf litter.

Taxonomic activity

Molytinae has been subject to intensive taxonomic study in recent decades. Major revisions include the Theognete monograph (94 ), the Leiosoma cribrum group (6 species), and numerous new species descriptions from Central America, Africa, and Asia. data are available for some species, such as Prothrombosternus tarsalis.