Morphology Data of Chiloglanis waterloti
Identification keys
Abnormalities
Main Ref. Schmidt, R.C., H.L. Bart, F. Pezold and J.P. Friel, 2017
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors
Remarks

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral fusiform / normal
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth sub-terminal/inferior
Type of scales
Diagnosis

Diagnosis: Chiloglanis waterloti is distinguished from all West African congeners, with the exception of C. longibarbis, in having fewer mandibular teeth in the functional row; it is distinguished from C. longibarbis in having shorter maxillary barbels and shorter medial mandibular barbels (Ref. 116018).

Description: A moderate-sized Chiloglanis; 48.0 mm maximum standard length observed; body dorsally depressed anteriorly; laterally compressed posteriorly; pre-dorsal angled toward snout; pre-orbital convex; post- dorsl body moderately angled ventrally towards caudal fin; pre-anal profile horizontal; post-anal horizontal to ventrally sloping towards caudal fin (Ref. 116018). Unculiferous tubercles scattered across body; concentration higher near head; lateral line complete; arising above level of orbit and sloping ventrally towards caudal fin; urogenital papillae sexually dimorphic; elongate in males; reduced and separated from anus by shallow invagination in females (Ref. 116018). Head depressed; gill membranes broadly united; gill openings restricted; opening slightly dorsal of pectoral-fin origin to level of mid-orbit; occipital-nuchal shield covered and visible through skin; eyes moderate; horizontal axis longest; orbits without free margins; anterior and posterior nares equidistant; mid-snout; posterior nares with elongated anterior and medial flaps (Ref. 116018). Mouth inferior; upper and lower lips united to form oral disc; oral disc moderate in size, its width 17.4-23.0% of standard length; wider than long; covered in papillae (Ref. 116018). Barbels in three pairs; maxillary barbel originating from posterolateral region of disc; unbranched; moderate in length, 20.4-37.8% of head length; lateral and medial mandibular barbels moderate; incorporated into lower lip; positioned on both sides of midline cleft on posterior margin of oral disc; lateral barbels, 11.5-22.2% of head length, nearly twice the length of medial barbels (Ref. 116018). Premaxillary teeth "S"-shaped; exposed tips brown; 39-70 teeth in three rows on ovoid tooth pads; secondary premaxillary teeth scattered on posterior surface of premaxillae; tertiary teeth small and needle-like; inserted near midline on dorsal edge of toothplate; mandibular teeth in 1-2 rows; "S"-shaped and bunched near midline; functional, anterior, row usually contains eight brown tipped teeth (Ref. 116018). Dorsal-fin origin just posterior to anterior third of body; dorsal fin with small spinelet, spine, and 5-6 rays; dorsal spine relatively long, 13.3-20.0% of standard length; anterior margin of spine smooth, three small notches distally; posterior margin smooth distally, four notches proximally; adipose fin moderate in length, 13.9-21.4% of standard length; margin convex; small notch posteriorly; caudal fin forked with rounded lobes; lower lobe slightly longer than upper lobe; count i,7,8,i; anal-fin origin posterior to origin of adipose fin; extending well beyond adipose-fin terminus; margin convex; count iii,6-7; pelvic-fin origin at vertical midway between dorsal and adipose fin; extending to anal-fin origin; margins convex; count i,6; pectoral fin with smooth spine; relatively long, 16.7-24.8% of standard length; count I,8-9 (Ref. 116018). Postcleithral process sexually dimorphic; elongate, spatulate in males; females possessing a shorter, pointed process; body size sexually dimorphic; females attaining larger standard lengths than males (Ref. 116018).

Colouration: Live colouration: body with light yellowish-brown ground colour with overlying melanophores, fins yellow (Ref. 116018). The colouration of preserved specimens in dorsal view, body a dark brown with mottling of medium brown; lighter areas anterior to dorsal-fin origin, and at adipose-fin origin and terminus; head dark brown; scattered spots of medium brown, dark melanophores spread throughout; in lateral view, body a yellow-buff; overlain by medium and dark browns above the midline, light areas more prominent below midline, dark areas extending to near the pelvic- and anal-fin origins, and around the caudal peduncle; small black melanophores scattered across sides, readily observed below midline; ventral surface yellow-buff; scattered melanophores, more numerous near pelvic and pectoral-fin origins; oral disc and barbels cream (Ref. 116018). Dorsal and pectoral spines and rays light brown totranslucent; bases of dorsal, pectoral, and anal fins marked with medium brown triangle; brown patches at mid-length of pectoral, dorsal, and anal fins; pelvic fins cream; small brown spot at mid-length; adipose fin cream; brown semicircular marking at origin and near base at mid-length; caudal fin cream; two dark areas near base and extending into the upper and lower lobes of the caudal fin (Ref. 116018).

Ease of Identification

Meristic characteristics of Chiloglanis waterloti

Lateral Lines Interrupted: No
Scales on lateral line
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line
Scale rows below lateral line
Scales around caudal peduncle
Barbels 6
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total
Vertebrae
preanal
total

Fins

Dorsal fin(s)

Attributes no striking attributes
Fins number 1
Finlets No. Dorsal   
Ventral  
Spines total 2 - 2
Soft-rays total 5 - 6
Adipose fin present

Caudal fin

Attributes forked; more or less normal

Anal fin(s)

Fins number 1
Spines total 0 - 0
Soft-rays total 9 - 10

Paired fins

Pectoral Attributes  more or less normal
Spines     1
Soft-rays   8 - 9
Pelvics Attributes  more or less normal
Position    abdominal  behind origin of D1
Spines     0
Soft-rays   7 - 7
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Boden, Gert
Modified by Boden, Gert
Comments & Corrections
Sign our Guest Book
Back to Search
cfm script by eagbayani, 17.10.00, php script by rolavides, 13/03/08 ,  last modified by sortiz, 06.27.17