Editing Gasterophilus (section)

=== Larva ===
In the third larval stage, the larvae have a length that can go from 1.27cm to 1.91 cm. They have a hooked mouthpart that allows them to attach into the gastrointestinal tract of the infected animal and a rounded body that is covered with spines in rows, of which quantity varies from different species.

After this stage, the larva is excreted with the animal feces in the form of a [[pupa]].<ref name=":1">{{Cite book|url=https://books.google.com/books?id=l3ScDwAAQBAJ&q=gasterophilus+haemorrhoidalis&pg=PA124|title=Parasiticide Screening: Volume 1: In Vitro and In Vivo Tests with Relevant Parasite Rearing and Host Infection/Infestation Methods|last1=Marchiondo|first1=Alan A.|last2=Cruthers|first2=Larry R.|last3=Fourie|first3=Josephus J.|date=2019-06-08|publisher=Academic Press|isbn=978-0-12-813891-5|language=en}}</ref><ref name=":2">{{Cite web|url=http://entnemdept.ufl.edu/creatures/livestock/horse_bot_fly.htm|title=horse bot fly - Gasterophilus intestinalis (DeGeer)|website=entnemdept.ufl.edu|access-date=2019-12-07}}</ref>