Stenostomidae

Stenostomidae is a family of freshwater catenulid flatworms. It is the most species-rich family of catenulids, with about 70 species described, most of them in the Neotropics.^[2]

Stenostomidae
Stenostomum simplex
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Platyhelminthes
Class:	Catenulida
Family:	Stenostomidae Vejdovsky, 1880
Genera[1]
Myostenostomum Luther, 1960 Rhynchoscolex Leidy, 1851 Stenostomum Schmidt, 1848 Xenostenostomum Reisinger, 1976

Catenulids of the family Stenostomidae are characterized by the brain divided into four clearly separated lobes, two anterior and two posterior, which lie near the mouth. The preoral zone contains a group of sensor cells with ciliated pits organized in long precerebral series.^[3]

References

1. Tyler, S. (2010). Stenostomidae Vejdovsky, 1880. In: Tyler, S., Artois, T.; Schilling, S.; Hooge, M.; Bush, L.F. (eds) (2006-2017). World list of Platyhelminthes. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=142047 on 2017-02-14
2. Damborenea, Cristina; Brusa, Francisco; Almagro, Io; Noreña, Carolina (2011). "A phylogenetic analysis of Stenostomum and its neotropical congeners, with a description of a new species from the Peruvian Amazon Basin". Invertebrate Systematics. 25 (2): 155. doi:10.1071/IS10026. hdl:11336/81148. ISSN 1445-5226.
3. Marcus, Ernst (1945). "Sôbre microturbellarios do Brasil". Comunicaciones Zoologicas del Museo de Historia Natural Montevideo. 1 (25): 1–74+4pl.