This long (45cm) long, very thin worm was found swimming up a very narrow stream of running water. The head end (out of focus) was a very plain form but darker than the rest of the grey brown body. No real idea what family it comes from - initially wondered if it was an elver - but no sign of a backbone or anything similar.
You can't make it out from the photo. But view a video recording here:
Organism was observed in a shallow creek.
Collected and released at the Portage River as part of the 3rd Annual Wood Soil & Water Conservation District ATV Tour.
Nematomorpha - Gordiacea
( this is the first observation of Gordiacei cave worm in the cave of Limestone blade of La Spezia )
The nematomorfi or gordiacei
are a little taxon similar to
nematodes. Adults live generally in streams to slow course, pools and troughs.
Nematomorfi larvae are parasites of arthropods and Hirudinea.
The larvae are devoid of digestive system and feed on the organic substances of the host likening them through the wall of the body.
They undergo various mute until metamorphose into adults emerging from the skin or the anus of the host when it is in an aquatic environment or in its vicinity.
Adults are free from digestive system and they do not eat, are short-lived compared to the larvae and their main task is to reproduce.
They have the appearance of filaments about ten cm long and thick only about 1 mm. these filaments.
They are sometimes curled up to form a maze reminiscent of the Gordian knot, by
hence the name.
In the streams of the caves of Italy Northern are found occasionally; however, it is presumable for other species troglobitic or troglophile. Completely missing one
study of italian gordiacei cave worms.
Se trata de un gusano o Nematodo (?) desconocido para mi. Parece un alambre, de color negro, creo que con algunos anillos casi imperceptibles, puede permanecer inmóvil, pero se mueve dentro del agua. dificil reconocer incluso cual es su parte anterior y posterior.. Lo encontré en el piso, en un charco de agua con tierra.. el palillode referencia mide 4.5 cm
Nematomorpha (sometimes called Gordiacea, and commonly known as horsehair worms or Gordian worms) are a phylum of parasitoid animals superficially similar to nematode worms in morphology, hence the name. They range in size in most species from 50 to 100 centimetres (20 to 39 in) long and can reach in extreme cases up to 2 metres, and 1 to 3 millimetres (0.039 to 0.12 in) in diameter. Horsehair worms can be discovered in damp areas such as watering troughs, swimming...