Metopina

Metopina is a genus of small flies belonging to the family Phoridae, often referred to as scuttle flies or coffin flies. They are characterized by their humped thorax and jerky, running movements.

Characteristics:

Metopina flies are generally small, ranging in size from 1 to 3 millimeters. Key identifying features include:

• Humped thorax: Like other phorid flies, Metopina species possess a distinctive arched or humped thorax.
• Legs: The legs are adapted for running, resulting in their characteristic scuttling or jerky movements.
• Wing venation: Phorid flies, including Metopina, have distinctive wing venation patterns that are used for identification at the genus and species level. The wing veins are often thickened towards the front.
• Antennae: Their antennae are typically short and stout.

Habitat and Behavior:

Metopina species can be found in a variety of habitats. Many species are associated with decaying organic matter, including carrion, fungi, and decaying vegetation. Some species are known to be attracted to wounds or bodily fluids of living animals. Some Metopina species exhibit parasitoid behavior.

Significance:

Metopina flies are of forensic importance because they can be attracted to decomposing remains, aiding in estimating the post-mortem interval. Their presence can also be of medical or veterinary importance, as some species are attracted to open wounds. They are not generally considered major pests but can be a nuisance in certain environments.

Classification:

Metopina belongs to the family Phoridae, order Diptera (true flies), class Insecta, phylum Arthropoda, and kingdom Animalia. The genus contains multiple species, with ongoing taxonomic research refining the classification.