Richardiidae

Richardiidae can be distinguished from other Tephritoidea families by the combination of patterned wings, often metallic body coloration, and tephritoid ovipositor structure. Within the family, genera are separated primarily by wing venation patterns, body coloration, and male and female terminalia characters. Epiplateinae subfamily (Automola, Epiplatea, Omomyia) is distinguished by specific wing venation and geographic distribution patterns—Omomyia is restricted to arid southwestern United States while Automola and Epiplatea are widespread in the Neotropics. Richardiodes species show considerable intraspecific variation in general body color, requiring examination of terminalia for reliable identification.

Predominantly tropical and subtropical environments. Adults frequent vegetation surfaces, particularly upper leaf surfaces where lekking behavior occurs in some species. Larval habitats vary: some species develop in living floral tissue and pollen of specific host plants (Taccarum ulei, Dieffenbachia oerstedii, Saranthe aff. klotzchiana), others in decaying plant material. One species has been recorded from pig carcasses in Amazonas, Brazil, suggesting potential saprophagous habits in some lineages. Omomyia species are restricted to arid areas of the southwestern United States.

Almost exclusively Neotropical, with the vast majority of species occurring in tropical regions of Central and South America. The genus Omomyia represents an exception, restricted to arid areas of the southwestern United States. Documented occurrences include Brazil (Amazonas, Pará, Amapá, Maranhão, Tocantins, Mato Grosso, Pernambuco), Peru, and other South American countries. Distribution records for individual genera: Automola and Epiplatea widespread in Neotropical Region; Richardiodes rectinervis in Brazilian Amazon with expanded range; R. trimaculata in Peru.

Larvae: living floral tissue and pollen in some species (Beebeomyia taccarivora, B. species on Dieffenbachia oerstedii); decaying plant material in others; saprophagy suspected in some lineages based on carcass association. Adults: specific feeding habits unknown; likely feed on nectar or other liquid resources. Host-specific associations documented: pineapple (Ananas comosus) for Melanoloma viatrix; Taccarum ulei (Araceae) for Beebeomyia taccarivora; Dieffenbachia oerstedii (Araceae) for another Beebeomyia species; Saranthe aff. klotzchiana (Marantaceae) for Setellia sp.

• Ananas comosus - hostPineapple; sole known host of Melanoloma viatrix, causing damage in commercial plantations
• Taccarum ulei - hostAraceae; inflorescences used exclusively for oviposition and brooding by Beebeomyia taccarivora
• Dieffenbachia oerstedii - hostAraceae; host plant for another Beebeomyia species
• Saranthe aff. klotzchiana - hostMarantaceae; upper leaf surfaces used as lek sites by Setellia sp.
• Sus scrofa - carcass associationDomestic pig carcasses; Epiplatea species recorded from carcasses in Amazonas, Brazil

Complete metamorphosis with egg, larva, pupa, and adult stages. In Beebeomyia taccarivora: eggs laid in inflorescences of host plant; larvae feed on living floral tissue and pollen; pupariation occurs on inner surface of spathe. Third instar larvae and puparia described for some species. Specific life cycle details unknown for majority of species.

Lek polygyny mating system documented in Setellia sp.: males occupy upper leaf surfaces of host plants and perform ritualized courtship and territorial displays. Reproductive dominance hierarchies established through male-male and female-female agonistic interactions. Behavioral convergence with other non-related dipteran lekkers noted. Ant-mimicry and male-male agonistic behavior reported in at least one Neotropical species. Females of some Beebeomyia species exhibit strict fidelity to host plant inflorescences for oviposition.

Pollen feeders and floral associates in some lineages, potentially contributing to pollination or acting as floral parasites. Saprophagous habits in decaying plant material suggest role in nutrient cycling. One species documented from carrion, indicating possible forensic or decomposition ecology significance. Pest status in pineapple plantations for Melanoloma viatrix.

Melanoloma viatrix is a documented pest of pineapple plantations in several South American countries including Brazil (Amapá, Pará), causing economic damage. Surveys and management strategies needed to prevent spread within Brazil's pineapple-producing regions. Otherwise little direct human interaction; some species potentially useful for forensic entomology based on carcass associations.

• TephritidaeAlso in superfamily Tephritoidea with patterned wings and tephritoid ovipositor; distinguished by different wing venation, body shape, and larval biology primarily in fruits rather than floral tissue
• UlidiidaeFormerly placed in Tephritoidea, some species with patterned wings; distinguished by different wing venation patterns and typically broader body form
• PiophilidaeSome species with metallic coloration and patterned wings; distinguished by different habitat preferences (often carrion, cheese) and wing venation

• Diptera
• Tephritoidea
• Neotropical
• patterned wings
• metallic coloration
• floral associates
• pineapple pest
• lek behavior
• Acalyptratae

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• Taxonomic revision of Richardiodes Hendel (Diptera, Richardiidae)
• Geographic distribution of Epiplateinae Steyskal (Diptera: Richardiidae): New records and distribution maps
• Lek Behavior as the Mating Strategy of Setellia sp. (Diptera: Richardiidae)
• Male-Male Agonistic Behavior and Ant-Mimicry in a Neotropical Richardiid (Diptera: Richardiidae)
• Novo registro de Epiplatea (Diptera: Richardiidae: Epiplateinae) em carcaças de Sus scrofa Linnaeus no Estado do Amazonas
• A new species of Beebeomyia Curran (Diptera: Richardiidae) from Brazil, with description of immature stages and notes on their association with Taccarum ulei (Araceae)
• A new species of the Neotropical genusBeebeomyia(Diptera: Richardiidae) with observations of its biology onDieffenbachia oerstedii(Araceae)
• If you seek, you will find: second record of Melanoloma viatrix Hendel, 1911 (Diptera, Richardiidae) in pineapple in Brazil and its distribution in the country