Mononchoides striatus

The Diplogastrids are a heterogeneous group of nematodes regarding morphology and feeding habit. Originally, they live in association with insects: some live inside insects, others live in the tunnels of bark beetles, in cow dung and other food-rich environments, carried there by insects. Diplogastrids have a short generation time and therefore, are able to react rapidly on fluctuations in food availability. In case the microbial activity decreases, they form inactive resting stages, usually called dauerlarvae. The dauerlarvae of aquatic Diplogastrids bear a small oil droplet on their anterior end which allows them to float and get the possibility to find new food resources. Mononchoides striatus, as shown. Is provided of a mouth cavity with small teeth; it occurs in dund and has not been found yet outside Europe.

More pictures of Mononchoides striatus (Bütschli, 1876):

Mononchoides striatus: female body
Mononchoides striatus: female body

Mononchoides striatus: head region with papillae, oral cavity & pharynx
Mononchoides striatus: head region with papillae, oral cavity & pharynx

Mononchoides striatus: head region with two tooths, oral cavity with two stoma parts
Mononchoides striatus: head region with two tooths, oral cavity with two stoma parts

Mononchoides striatus: head region with cheilostom subdivided into several rod-like plates
Mononchoides striatus: head region with cheilostom subdivided into several rod-like plates

Mononchoides striatus: cuticle with longitudinal ridges
Mononchoides striatus: cuticle with longitudinal ridges

Mononchoides striatus: oral cavity with two stoma parts
Mononchoides striatus: oral cavity with two stoma parts

Mononchoides striatus: oral cavity, cheilostom with rod-like plates
Mononchoides striatus: oral cavity, cheilostom with rod-like plates

Mononchoides striatus: pharynx with metacorpus
Mononchoides striatus: pharynx with metacorpus

Mononchoides striatus: longitudinal ridges
Mononchoides striatus: longitudinal ridges

Mononchoides striatus: vulva
Mononchoides striatus: vulva

Mononchoides striatus: anal opening
Mononchoides striatus: anal opening

Mononchoides

Mononchoides: female body
Mononchoides: female body

Mononchoides: female body mid and posterior part
Mononchoides: female body mid and posterior part

(Click on the pictures for an enlargement, © Laboratory of Nematology/Pictures: Hanny van Megen)