Morphology Data of Chiloglanis pezoldi
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 pezoldi is distinguished from C. waterloti, C. longibarbis, C. occidentalis, C. normani, C. nzerekore, C. kabaensis, and C. kolente in having more mandibular teeth in the functional row; it can be easily distinguished from C. polyodon and C. lamottei in having fewer mandibular teeth in the functional row, and from Chiloglanis aff. micropogon in having moderately long medial and lateral mandibular barbels vs. absent or reduced barbels; it is distinguished from C. dialloi and C. loffabrevum in having longer dorsal spines; it is distinguished from C. camarabounyi in having longer pectoral spines, fewer premaxillary teeth, 51-77 vs. 60-112, and a longer adipose fin, 13.2-21.9% of standard length vs. 12.1-15.9%; it can be distinguished from C. tweddlei in having a smaller premaxillary tooth patch, 12.2-15.8% of standard length vs. 15.3-18.2%, and in having premaxillary teeth in three rows vs. four rows (Ref. 116018).

Description: A moderate-sized, robust Chiloglanis; 50.7 mm maximum standard length observed; body dorsally depressed anteriorly; laterally compressed posteriorly; pre-dorsal profile convex; sloping ventrally to orbit; pre-orbital strongly convex to snout; post-dorsal profile nearly horizontal; sloping ventrally towards caudal fin; pre-anal profile convex to oral disc; post-anal profile horizontal to caudal fin (Ref. 116018). Small unculiferous tubercles scattered across body: higher concentrations on head and dorsum; lateral line complete; arising above level of orbit and sloping ventrally towards caudal fin; urogenital papillae sexually dimorphic; males with elongate papillae; papillae reduced and separated from anus by shallow invagination in females (Ref. 116018). Head depressed; gill membranes broadly united; gill openings restricted; opening from pectoral-fin origin to level of center orbit; occipital-nuchal shield covered and visible through skin; eyes moderate; located near mid-head length; horizontal axis longer; without free margins; anterior and posterior nares positioned mid-snout; posterior nares slightly further apart than anterior; elongated medial and anterior flaps on posterior nares (Ref. 116018). Mouth inferior; upper and lower lips united to form oral disc; oral disc moderate in size, itw width 17.2-22.4% of standard length; length and width nearly equal; covered with papillae (Ref. 116018). Barbels in three pairs; maxillary barbels originate from posterolateral region of the disc; unbranched and moderate in length, 20.6-30.1% of head length; lateral and medial mandibular barbels moderate; incorporated in lower lip and positioned on both sides of prominent midline cleft; lateral barbels, 10.2-14.5% of head length, nearly twice the length of medial barbels (Ref. 116018). Primary premaxillary teeth "S"-shaped with exposed orange-brown tips; 51-77 teeth in three scattered rows on two ovoid tooth pads; secondary premaxillary teeth scattered on posterior surface of premaxillae; tertiary teeth sharp and needle-like; near midline of dorsal edge of toothplate; mandibular teeth in 1-2 rows; "S"-shaped and bunched near midline; functional, anterior, row usually contains 12 brown-tipped teeth (Ref. 116018). Dorsal-fin origin posterior to anterior third of body; dorsal fin with small spinelet, spine, and 4-6 rays; dorsal spine relatively long, 15.2-20.7% of standard length; anterior margin smooth with small notches distally; posterior edge of dorsal spine smooth; adipose fin moderate in length, 13.2-21.9% of standard length; margin convex; caudal fin forked with rounded lobes; lower lobe slightly longer than upper lobe; count i,7,8,i; anal-fin origin posterior to adipose-fin origin; margin convex; count iii,5-7; pelvic-fin origin midway between dorsal-fin terminus and adipose fin; extending to anal-fin origin; margins convex; count i,6; pectoral fin with smooth spine; relatively long, 16.7-22.9% of standard length; count I,8 (Ref. 116018). Postcleithral process sexually dimorphic; males with elongate, spatulate process; females with shorter, bluntly pointed process (Ref. 116018).

Colouration: In dorsal view, body medium brown; patches of lighter brown at pre-orbit, origin of dorsal fin, and origin and terminus of adipose fin; head and dorsum covered with light unculiferous tubercles; in lateral view, body light brown to cream; overlain by areas of medium brown, light areas at adipose-fin terminus extending to anal-fin terminus; body covered in melanophores; more noticeable in lighter areas; in ventral view, body cream; few melanophores on margin of chest and belly; oral disc and barbels cream (Ref. 116018). Pectoral and dorsal spines and rays cream to translucent; medium brown triangular patch at base of pectoral and dorsal fin; pectoral fin with scattered melanophores; dorsal fin with melanophores at mid-length creating a faint bar; adipose fin cream; brown at origin; pelvic fin cream; anal fin cream; small brown patch at base near origin; caudal fin cream to translucent; two irregular brown areas in upper and lower lobes (Ref. 116018).

Ease of Identification

Meristic characteristics of Chiloglanis pezoldi

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 4 - 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 8 - 10

Paired fins

Pectoral Attributes  more or less normal
Spines     1
Soft-rays   8 - 8
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
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