Morphology Data of Andersonia leptura
Identification keys
Main Ref. Ferraris Jr., C.R. and R.P. Vari, 2012
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors

Descriptive characteristics of juvenile and adult

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

Diagnosis: dorsal, pectoral and adipose fins with distinct spine anteriorly; a series of bony scutes on body posterior of the dorsal-fin origin; lateral abdominal surface not covered with superficial scutes; scapulo-coracoid and clavicle lack superficial rugose plates (Ref. 90257).

Description: body very thin and tapering backwards; head short and deep; snout with a distinct, posteriorly bifurcate median bony crest giving rise to other, parallel, crests on dorsal surface of head; eyes rather large and widely separated; nostrils fairly large, the posterior pair partially obstructed by a dermal fold; mouth small and subterminal; barbels tiny and simple, the maxillary pair without a basal membrane; branchiostegal membrane curved ventrally; an occipital process with a median crest on top of head; supraoccipital process flanked by another bony process; dorsal fin separated from supraoccipital process by a narrow space that may be occupied by 1-2 bony scutes; dorsal fin positioned above pelvic fins; principal dorsal- and pectoral-fin ray tiny and bony; pectoral fins with 6 branched rays, their tips reaching to pelvic-fin bases; adipose fin short, preceded by a small spine and positioned above posterior half of anal fin; caudal peduncle long and very narrow, its length comprised 3.2-3.4 times in standard length; caudal fin triangular, its posterior margin lunate; a series of 23-25 bony scutes present on both sides of body between dorsal fin and caudal peduncle and a second series of 21-23 bony scutes between pelvic fins and caudal peduncle; 7+7 principal caudal fin rays (Ref. 57128).

Coloration: back with 4-5 irregular brown spots, belly not pigmented; fins with scattered blackish-brown spots and pale stripes (Ref. 57128).

Ease of Identification

Meristic characteristics of Andersonia leptura

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 5 - 6
on upper limb 1
total 34 - 36


Dorsal fin(s)

Attributes no striking attributes
Fins number 1
Finlets No. Dorsal   0
Ventral  0
Spines total 1 - 1
Soft-rays total 5 - 7
Adipose fin present

Caudal fin

Attributes more or less truncate; more or less normal

Anal fin(s)

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

Paired fins

Pectoral Attributes  more or less normal
Spines     1
Soft-rays   6
Pelvics Attributes  more or less normal
Position    abdominal  beneath origin of D1
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Boden, Gert
Modified by Musschoot, Tobias
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cfm script by eagbayani, 17.10.00, php script by rolavides, 13/03/08 ,  last modified by sortiz, 06.27.17