Morphology Data of Sauvagella robusta
Identification keys
Abnormalities
Main Ref. Stiassny, M.L.J., 2002
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors
Remarks

Descriptive characteristics of juvenile and adult

Striking features none
Body shape lateral elongated
Cross section compressed
Dorsal head profile more or less straight
Type of eyes more or less normal
Type of mouth/snout more or less normal
Position of mouth superior
Type of scales
Diagnosis

Diagnosis: Body relatively elongate; belly rounded, without pre-pelvic scutes, but a pelvic scute present with slender lateral arms; gillrakers reduced in number, 15-19 gillrakers on lower limb of first arch; pelvic fin with 1 unbranched and 7 branched finrays, a little anterior to dorsal fin origin; last two anal finrays not separate from others (Ref. 33664). It is distinguished from Sauvagella madagascariensis by lower vertebral number, 38-40 vs. 41-43; deeper body, 20.8-27.4% of standard length vs. 15.8-21.1%; a shorter snout, 18.5-26.6% of head length vs. 26.2-33.7%; and a lower anal fin ray count, 13-17 vs. 17-19 (Ref. 33664).

Description: Robust, relatively deep-bodied, even in small specimens, with a straight dorsal profile; ventrum markedly rounded to caudal peduncle; snout short and straight, with slightly upturned mouth; gape inclination approximately 40° to horizontal; upper jaw to vertical through anterior margin of orbit (Ref. 33664). Pre-maxilla with short dentigerous arm, extending over anterior third of maxillary shaft; pre-maxillary teeth few, 5-8, small unicuspids in single row; maxilla usually with smooth ventral flange, slightly serrate in large individuals; single, tear-shaped posterior supramaxilla; lower jaw teeth few, in single row of small unicuspids restricted to region of symphysis (Ref. 33664). Relatively few robust rakers on lower limb of first arch, 15-19; 7-9 hypobranchial rakers, mostly blunt and conical, increasing in length to ceratobranchial; 10-12, elongate, widely spaced rakers on ceratobranchial; usually 1 raker in angle of arch, included in count of lower limb, and 9-12 epibranchial rakers; a row of short blunt rakers on inner face of third epibranchial (Ref. 33664). Dorsal fin short-based, relatively tall, usually with 3 unbranched and 8-12 branched rays; entire fin situated anterior to anal origin; anal fin with 3-4 unbranched and 11-14 branched rays, origin posterior to end of dorsal; ventral margin of anal broadly incised; pectoral fin short, with 11 rays, reaching midway to pelvic fin origin; pelvic fin with 1 unbranched and 7 branched rays, its insertion anterior to dorsal fin origin; caudal fin forked (Ref. 33664). Scales are cycloid (Ref. 33664). Belly rounded, lacking pre-pelvic scutes and post-pelvic scutes; pelvic scute with slender lateral arms (Ref. 33664). Vertebral counts 38-40 with 20-22 precaudal and 18-19 caudal centra; first supraneural bone flat and platelike, remaining 12-13 short and tubular; hyoid arch with 5 branchiostegal rays, first is narrow and filamentous, the second variously expanded, and rest are flat and broad; a single row of small teeth on ectopterygoid, small toothpatch on median face of endopterygoid, rodlike palatine edentate even in large individuals (Ref. 33664).

Colouration: In life, uniformly pale creamy yellow with some silvery iridescence on chest and ventrum (Ref. 33664). Preserved specimens are pale cream or dark yellow with faint pigment ringing dorsal scale margins, slightly darkening the dorsum; a trace of a thin midlateral band of dark pigment restricted to posterior half of body; dorsal, anal and caudal fins with a line of dark pigment along base at body wall; pupil situated more-or-less in mid-eye, iris silver or black (Ref. 33664).

Ease of Identification

Meristic characteristics of Sauvagella robusta

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
Gill clefts (sharks/rays only)
Gill rakers
on lower limb 15 - 19
on upper limb 9 - 12
total
Vertebrae
preanal
total 38 - 40

Fins

Dorsal fin(s)

Attributes no striking attributes
Fins number 1
Finlets No. Dorsal   
Ventral  
Spines total 0 - 0
Soft-rays total 11 - 15
Adipose fin absent

Caudal fin

Attributes forked; more or less normal

Anal fin(s)

Fins number 1
Spines total 0 - 0
Soft-rays total 13 - 17

Paired fins

Pectoral Attributes  more or less normal
Spines     0
Soft-rays   11 - 11
Pelvics Attributes  more or less normal
Position    abdominal  before origin of D1
Spines     0
Soft-rays   8 - 8
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Capuli, Estelita Emily
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