Rev 09/10/2026
Female:
Male:
Ref: Gradinarov, 2014.
Reported median body size for this species (Length mm; width micrometers; weight micrograms) - Click:
Isomermis lairdi was described from larvae of black flies (Simuliidae) in Western Africa, and is also reported from Bulgaria (Gradinarov, 2014).
In the later stages of development, stichosome separates from the intestine, which becomes a trophosome in which the walls and lumen of the intestine disappear resulting in a syncyteal structure. with no anal opening to the exterior.
As the nematodes mature in the host nymph, they become oriented longitudinally in the abdominal and thoracic regions of the host. They can be seen with the naked eye during the late stages of parasitic development. The nematodes emerge from the hosts in the regions of the anus or mouth, usually killing the host (Rusconi et al., 2020). The emerge from thwe host as post-parasitic juveniles with similar dimensions as the adults. They molt to the adult stages which mate and lay eggs or release juveniles into sedimentl at the bottom of a shallow water body
Biological regulation of black flies