Morphology Data of Microsynodontis vigilis
Identification keys
Abnormalities
Main Ref. Ng, H.H., 2004
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors
Remarks Males with numerous tubercles on sides of head on region extending from snout to preopercle, and long genital papilla situated immediately posterior to anus; females with fewer tubercles on sides of head, and with smaller, distally flattened genital papilla (Ref. 52369).

Descriptive characteristics of juvenile and adult

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

Diagnosis: supracleithral process reaching to vertical through posterior-most tip of nuchal shield; eye large, its diameter 21.0-25.0% HL; adipose fin moderately long, its base 22.0-28.2% SL; body without numerous dark brown elongate spots; caudal peduncle slender, its depth 8.1-9.8% SL; caudal fin rounded; body slender and elongate; snout length 34.7-47.6% SL; both sexes with short (< 0.1 mm) tubercles on dorsal and lateral surfaces of head; dorsal spine curved; anterior edge of pectoral spine with antrorse serrations (Ref. 81251).

Description: body compressed; predorsal profile gently convex; postdorsal body sloping gently ventrally; head depressed and broad, acutely rounded when viewed laterally and with rounded snout margin when viewed from above; eye large and ovoid, horizontal axis longest; mouth inferior and crescent-shaped; lips plicate; maxillary barbel long and slender, extending to just beyond base of last pectoral-fin ray; inner mandibular-barbel origin close to midline, extending to base of pectoral spine and with 2 short, thin branches on anterior half and 3-5 long, thin branches on posterior half; outer mandibular barbel originates posterolateral of inner mandibular barbel, extending to middle of pectoral-fin base and with 3-5 long, thin branches; gill openings narrow, extending from immediately ventral to posttemporal to immediately ventral to base of pectoral spine; supracleithral process thin and longer than in other Microsynodontis species; dorsal fin located at anterior third of body, with convex margin; dorsal-fin spine long, stout and slightly curved, smooth on both anterior and posterior margins; adipose fin moderately long; margin slightly convex for entire length and posterior end deeply incised; caudal fin rounded, with i,6,6,i principal rays; anal-fin base located ventral to posterior half of adipose fin, with iii-iv,7-8 rays and convex margin; pelvic-fin origin at vertical ventral to posterior end of dorsal-fin base, with slightly convex margin; pectoral-fin spine slightly curved and stout; anterior spine margin with 22-28 small serrations along entire length of spine, serrations antrorse on distal two-thirds and anteriorly directed on proximal third; posterior spine margin with 8-13 strong serrations along entire length; lateral line complete and midlateral (Ref. 52369).

Coloration: dorsal and lateral surfaces of head and body dark chocolate brown, fading to light brown on belly in preserved specimens; snout with a series of light yellow spots delineating anterior and posterior nares; cheek region with 1-2 light yellow spots immediately ventral to orbit; light yellow band encircling nape at supraoccipital; dorsal third of body with series of 4 light yellow vertical bar-shaped marks extending to lateral midline of body: 1st at middle of dorsal-fin base, 2nd at adipose-fin origin, 3rd at middle of adipose-fin origin and last on caudal peduncle immediately posterior to adipose fin; ventral third of flanks with a longitudinal series of 4-7 light yellow spots or vertical bar-shaped marks; dorsal fin with dark chocolate brown base and 1-2 rows of elongate spots forming longitudinal dark chocolate brown rows; pectoral, pelvic and anal fins with hyaline bases and similarly marked; caudal fin hyaline, with elongate brown spots forming 2-3 irregular columns (Ref. 52369, 81251).

Ease of Identification

Meristic characteristics of Microsynodontis vigilis

Lateral Lines 1 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 35 - 37

Fins

Dorsal fin(s)

Attributes
Fins number 1
Finlets No. Dorsal   
Ventral  
Spines total 2 - 2
Soft-rays total 6 - 7
Adipose fin present

Caudal fin

Attributes more or less truncate; more or less normal

Anal fin(s)

Fins number 1
Spines total 0 - 0
Soft-rays total 10 - 12

Paired fins

Pectoral Attributes  1st ray hardened with locking structure
Spines     1
Soft-rays   5 - 7
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 )
Comments & Corrections
Back to Search
cfm script by eagbayani, 17.10.00, php script by rolavides, 13/03/08 ,  last modified by sortiz, 06.27.17