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Muscomorpha
Female blowfly showing the three-segmented antennae and the arista
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Clade:	Pancrustacea
Class:	Insecta
Order:	Diptera
Suborder:	Brachycera
Infraorder:	Muscomorpha
Sections
Schizophora Aschiza

The Brachyceran infraorder Muscomorpha is a large and diverse group of flies, containing the bulk of the Brachycera and most of the known flies. It includes a number of the most familiar flies, such as the housefly, the fruit fly, and the blow fly. The antennae are short, usually three-segmented, with a dorsal arista. Their bodies are often highly setose, and the pattern of setae is often taxonomically important.

The larvae of muscomorphs (in the sense the name is used here; see below) have reduced head capsules, and the pupae are formed inside the exoskeleton of the last larval instar. Exit from this puparium is by a circular line of weakness, and this pupal type is called "cyclorrhaphous"; this feature gives this group of flies their traditional name, Cyclorrhapha.

The name Cyclorrhapha is used, in various modern classifications, to represent either a subgroup within the infraorder Muscomorpha, or simply a rankless group within the Brachycera. In either case, the Empidoidea are the sister taxon to the Cyclorrhapha. In the present classification, as the term Muscomorpha is used to refer to the sister taxon of the Empidoidea, the names "Muscomorpha" and "Cyclorrhapha" are effectively synonymous (though not entirely interchangeable: for nomenclatural purposes, it is always considered better if the endings of names of similar rank are consistent, and since all the other infraordinal names end in "-morpha", the use of "Cyclorrhapha" as an infraordinal name would be inconsistent).

In the Tree of Life Web Project, the name "Muscomorpha" refers to the Asilomorpha plus the Cyclorrhapha.

• Section Aschiza
  • Superfamily Platypezoidea
  • Superfamily Syrphoidea
• Section Schizophora
  • Subsection Acalyptratae
    • Superfamily Conopoidea
    • Superfamily Tephritoidea
    • Superfamily Nerioidea
    • Superfamily Diopsoidea
    • Superfamily Sciomyzoidea
    • Superfamily Sphaeroceroidea
    • Superfamily Lauxanioidea
    • Superfamily Opomyzoidea
    • Superfamily Ephydroidea
    • Superfamily Carnoidea
  • Subsection Calyptratae
    • Superfamily Muscoidea
    • Superfamily Oestroidea
    • Superfamily Hippoboscoidea

• The Tree of Life Web Project: Brachycera