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Geomyza tripunctata
Geomyza tripunctata


Geomyza tripunctata
Geomyza tripunctata is a species in the order two-winged flies (Diptera), the suborder flies (Brachycera), the infraorder Muscomorpha (section Schizophora, subsection Acalyptrata), the superfamily Opomyzoidea, the family Opomyzidae, and the genus Geomyza. Scientific synonyms for this species are: Geomyza bracata, Geomyza calceata and Geomyza pictipennis. Geomyza tripunctata are widespread throughout the Holarctic and are one of Europe's most common Opomyzidae species.
Adults reach body lengths of up to 4 mm. Their bodies are slimly built and usually orange or black. The head of this fly is relatively broad and they have bright red compound eyes. The 3rd antennal segment is short and ovoid. The antennae are inclined downwards from the 2nd segment on. A small triangle of ocelli (simple eyes) can be seen on the upper half of the forehead. Orbital bristles reach from the front edge of the eyes to the edge of the forehead. The upper surface of the chest (thorax) is brownish-black in colour and also has bristles. The scutellum is rusty brown. The wings are transparent with a reddish-yellow sheen and have 2 diagonal veins which have several dark patches.
Geomyza tripunctata occur from the coast to high mountains and prefer wet or dry meadows and forests, where they can be found from May to November on grasses and herbaceous plants. In mild winters they may be seen in January.
After mating, the fertilized females lay their eggs at the base of grasses (Poaceae). After hatching, the maggots eat their way into and through the young sprouts and later feed on the young leaves of the grass plants. Further growth of such plants can be disrupted by this, or even prevented. The damage patterns on grass plants vary. Ragged, cracked leaves, are often seen, as are swollen stems at ground level or near the ground, or the formation of 3 to 4 stalks on the same plant. Seedlings may be cut off at the base. The maggots reach body lengths of up to 5 mm. Approximately 30 days after hatching from the eggs, the maggots have completed their development and they leave the host plants and pupate.

Geomyza tripunctata
Common namesCereal Fly
AuthorFallen, 1823
Distribution
Continents:

Eurasia
Europe
North Europe (British Isles (United Kingdom (Great Britain (England (English Midlands (East Midlands (Leicestershire)))))), Germany, Scandinavia (Norway, Sweden, Denmark), Fennoscandia (Finland)), South Europe (Italy, Iberian Peninsula (Spain)), Central Europe (Hungary, Czech Republic), West Europe (Switzerland, Benelux (Belgium, Netherlands)), Southeast Europe (Greece)
Asia
South Asia (India, Afghanistan)
Russia
America
North America
Canada, USA


CountriesAfghanistan, Belgium, Canada, Czech Republic, Denmark, Finland, Germany, Greece, Hungary, India, Italy, Netherlands, Norway, Russia, Spain, Sweden, Switzerland, USA, United Kingdom
Links and ReferencesGeomyza tripunctata in dyntaxa.se

Description of images / photos
Photography with Cameras
Nikon D3x, Nikon D300, Canon 50D
Image editing with Photoshop
1. Geomyza tripunctata
Quick search: Geomyza - Tripunctata - Opomyzidae - Fly - Harmful - Cereal
Brown - Spots - Species - Thorax - Humans - Adult - Damage - English
Taxonomy
ClassInsecta
Insects, True insects
SubclassPterygota
Winged insects
InfraclassNeoptera
Wing-folding insects
SuperorderHolometabola
Holometabolous Insects
OrderDiptera
True flies, Mosquitoes, Gnats, Flies
SuborderBrachycera
Short-horned flies, Muscoid flies, Circular-seamed flies, Flies
InfraorderMuscomorpha
SectionSchizophora
SubsectionAcalyptratae
Acalyptrate muscoids
SuperfamilyOpomyzoidea
FamilyOpomyzidae
Opomyzid flies
GenusGeomyza
Speciestripunctata
Geomyza tripunctata
Cereal Fly
AuthorFallen, 1823
 
Synonyms
Geomyza bracata
Geomyza calceata
Geomyza pictipennis
 Species overview
 Pictures

Keywords
ABCDEFGHIJKLM
NOPQRSTUVWXYZ
German Flag Geomyza tripunctata
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