Dorsal spines (total): 1; Dorsal soft rays (total):
6; Anal spines: 3; Anal soft rays: 8. Mouth is used
as a sucking disc to hold its position in fast flowing
waters. Gut length is less than standard length and
the mandibular teeth are used to scrape invertebrates
from stones. The species is differentiated from other
Chiloglanis by the presence of a smooth dorsal
spine, long widely spaced mandibular teeth and an
emarginate caudal fin. Habitat: Found
in shallow rocky runs and riffles of clear rivers,
at an altitude of 900-1200 m above sea level, and
depths from 0.2 to 0.4 m. Reproduction:
Oviparous. Distinct pairing during breeding and is
likely to be an interstitial gravel spawner. Colouration:
Mid brown colouration, light brown on the belly, with
a dark brown on the head and dorsum as well as the
upper parts of the flanks. Along the lateral line
there is a narrow beige coloured stripe; variably
sized spots of the same colour are distributed over
the body and mark the secondary lateral line system.
Aquarium Care: Good oxygenated water
from a power filter. Sand or gravel substrate with
smooth rocks or pebbles. Their dorsal and pectoral
fins are sharp and can cause wounds if not handled
carefully. Diet: Feeds on invertebrates
such as mayfly nymphs and caddis fly, blackfly or
midge larvae grazed from rocks. Remarks:
This species is widespread although not abundant from
the Phongolo River north to the Incomati River, South
Africa. Despite varied impacts recent surveys in Swaziland
indicate that it is more common there than in South
African rivers (Bills et al. 2004, Diedericks et al.
2016). A population decline, especially in South Africa,
has been observed where the Phongolo Suckermouth (Chiloglanis
emarginatus) was only found at one locality in
the Usutu Catchment, South Africa (Diedericks et al.
2016). This decline can be imputed to coal mining
with resultant pollution and increased sedimentation
resulting in habitat loss. It is known from an extent
of occurrence (EOO) of 16,663 km² and an area
of occupancy (AOO) of 252 km², with 10 known
locations, eight from Swaziland (Nkomati-, Mbuluzi-,
Mlawula-, Mpuluzi-, Lusushwane-, Ngwempisi-, Hlelo-,
Mkhondvu-river) and two from South Africa (Upper Ngwempisi-
and Pongolo rivers). It qualifies as Vulnerable B1ab(iii,iv)+2ab(iii,iv)
and this species should be closely monitored especially
in South Africa, where threats are significant (IUCN
Two areas, tributaries of the Pongolo and Komato-Incomati
rivers in South Africa and Swaziland, and the Pungwe
and middle and lower Zambezi in Zimbabwe.
Type locality: Lekkerloop River, tributary
of the Komati River of the Incomati River system,
on the farm Vergelegen, Carolina District, Southern
Ferraris, C.J. Jr.,
2007. Checklist of catfishes, recent and fossil (Osteichthyes:
Siluriformes), and catalogue of siluriform primary
types. Zootaxa 1418:1-628. Froese, R. and D. Pauly. Editors.
2022. FishBase. World Wide Web electronic publication.
www.fishbase.org, ( 07/2022 ). Gosse, J.-P., 1986. Mochokidae. p.
105-152. In J. Daget, J.-P. Gosse and D.F.E. Thys
van den Audenaerde (eds.) Check-list of the freshwater
fishes of Africa (CLOFFA). ISNB, Brussels, MRAC, Tervuren;
and ORSTOM, Paris. Vol. 2. Roux, F. & Hoffman, A. . 2018.
Chiloglanis emarginatus. The IUCN Red List of Threatened