Merosargus

Loew, 1855

soldier flies

Species Guides

2

Merosargus is a large of soldier flies (Stratiomyidae: Sarginae) comprising at least 140 described , primarily distributed in the Neotropical region. The genus exhibits remarkable , which appears to be maintained through larval resource-use specialization. males defend oviposition sites, and larvae develop in association with decomposing plant materials.

Merosargus caeruleifrons by (c) Zachary Dankowicz, some rights reserved (CC BY), uploaded by Zachary Dankowicz. Used under a CC-BY license.Merosargus caeruleifrons by (c) Zachary Dankowicz, some rights reserved (CC BY), uploaded by Zachary Dankowicz. Used under a CC-BY license.Merosargus by (c) Daniel Mesa, some rights reserved (CC BY), uploaded by Daniel Mesa. Used under a CC-BY license.

Pronunciation

How to pronounce Merosargus: //ˌmɛrəˈsɑːrɡəs//

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Habitat

Larvae develop in rotting vegetal material, including decomposing plant matter associated with herbs, vines, palms, and trees. Specific microhabitats include rotting stems, leaf axils, and other decomposing plant substrates.

Distribution

Neotropical region, with documented occurrences in Brazil (states of Paraná, Ceará, Maranhão, Mato Grosso do Sul, Rio de Janeiro, and Minas Gerais).

Life Cycle

Larvae pass through multiple instars (6th instar documented for some ) before pupating; puparial stage has been described for at least one species (M. cingulatus).

Behavior

males exhibit territorial , defending oviposition sites. This territoriality may lead to and has been hypothesized to drive resource specialization.

Ecological Role

Larvae contribute to decomposition of plant material. High degree of larval resource specialization and minimal overlap in resource use among sympatric suggests partitioning maintains local diversity.

Similar Taxa

  • PtecticusAlso in Sarginae; shares similar puparial and larval in rotting vegetal material. Distinguished by and puparial characteristics.

More Details

Species diversity and specialization

The contains at least 140 described . A study of 12 sympatric species in Brazil found that six species used only a single resource type, with each resource type used on average by less than two species, indicating strong larval resource specialization.

Sources and further reading