Euchilichthys is a genus

Genus

In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 of catfish

Catfish

Catfishes are a diverse group of ray-finned fish. Named for their prominent barbels, which resemble a cat's whiskers, catfish range in size and behavior from the heaviest and longest, the Mekong giant catfish from Southeast Asia and the second longest, the wels catfish of Eurasia, to detritivores...

es (order

Order (biology)

In scientific classification used in biology, the order is# a taxonomic rank used in the classification of organisms. Other well-known ranks are life, domain, kingdom, phylum, class, family, genus, and species, with order fitting in between class and family...

 Siluriformes) of the family

Family (biology)

In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...

 Mochokidae

Mochokidae

The Mochokidae are a family of catfishes that are known as the squeakers and upside-down catfish. There are 10 genera and about 188 species of mochokids. All the mochokids are freshwater species originating from Africa....

. It includes five species

Species

In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...

, E. astatodon, E. boulengeri, E. dybowskii, E. guentheri, and E. royauxi.

E. astatodon and E. boulengeri originate from the Kasai River

Kasai River

The Kasai River is a tributary of the Congo River, located in central Africa. The river begins in Angola and serves as the border between Angola and the Democratic Republic of the Congo , then flows into the DRC, where it joins the Congo northeast of Kinshasa. The Kasai's tributaries include the...

. E. dybowskii inhabits the Ja River of the Congo River

Congo River

The Congo River is a river in Africa, and is the deepest river in the world, with measured depths in excess of . It is the second largest river in the world by volume of water discharged, though it has only one-fifth the volume of the world's largest river, the Amazon...

 basin in Cameroon

Cameroon

Cameroon, officially the Republic of Cameroon , is a country in west Central Africa. It is bordered by Nigeria to the west; Chad to the northeast; the Central African Republic to the east; and Equatorial Guinea, Gabon, and the Republic of the Congo to the south. Cameroon's coastline lies on the...

. E. guentheri is known from the Congo River basin, up to the Bangweulu River

Lake Bangweulu

Bangweulu — 'where the water sky meets the sky' — is one of the world's great wetland systems, comprising Lake Bangweulu, the Bangweulu Swamps and the Bangweulu Flats or floodplain...

 system. E. royauxi is distributed in the Congo River basin, up to the Moero Lake

Lake Mweru

Lake Mweru is a freshwater lake on the longest arm of Africa's second-longest river, the Congo. Located on the border between Zambia and Democratic Republic of the Congo, it makes up 110 km of the total length of the Congo, lying between its Luapula River and Luvua River segments.Mweru...

 system.

Euchilichthys species have the lips and part of the barbels

Barbel (anatomy)

A barbel on a fish is a slender, whiskerlike tactile organ near the mouth. Fish that have barbels include the catfish, the carp, the goatfish, sturgeon, the zebrafish and some species of shark...

 modified into a suckermouth

Suckermouth

In fishes, a suckermouth is a ventrally-oriented mouth adapted for grazing on algae and small organisms that grow on submerged objects....

. E. boulengeri and E. dybowskii are smaller species, growing to about 9.7 centimetres TL

Fish measurement

Fish measurement refers to the measuring of the length of individual fish and of various parts of their anatomy. These data are used in many areas of ichthyology, including taxonomy and fisheries biology.-Overall length:...

and 11.2 cm TL respectively. E. astatodon, E. guentheri, and E. royauxi grow to about 18.05–22.0 cm ( in) TL.