Morphology Data of Pleuragramma antarcticum
Identification keys
Abnormalities
Main Ref. Dewitt, H.H., P.C. Heemstra and O. Gon, 1990
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs other
Different appearance always different morphology between mature adults
Different colors
Remarks Males develop longer pelvics than females (Ref. 28937).

Descriptive characteristics of juvenile and adult

Striking features none
Body shape lateral fusiform / normal
Cross section oval
Dorsal head profile more or less straight
Type of eyes more or less normal
Type of mouth/snout upper jaw greatly elongated
Position of mouth superior
Type of scales cycloid scales
Diagnosis

Pre-opercular-mandibular canal pores 9 (rarely 10), with 3 (rarely 4) on the mandible. Infraorbital canal with 4+2 pores; lateral line organs (neuromasts) present exposed region between the canal segments, the normal number probably being 4 (rarely 5), but some or all are often missing. Supraorbital canal with 3+1 pores (a second, more posterior pore rarely present in postero-dorsal section); between these 2 supraorbital canal segments is a trough divided by 3 low transverse ridges into 4 shallow depressions; on each ridge is a neuromasts organ. Temporal canal with 1+4 pores; between the 2 segment lies a single exposed neuromast. Supratemporal canal with 1+1 pores; no traces of neuromasts were found in the intervening regions.

Color: In life, pink with a silvery hue, the dorsal surface slightly darker. All fins pale, with clear hyaline membranes. The body becomes silvery with a darker dorsum only after death (Ref. 28937).

Ease of Identification

Meristic characteristics of Pleuragramma antarcticum

Lateral Lines 3 Interrupted: No
Scales on lateral line
Pored lateral line scales
Scales in lateral series 50 - 56
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 8 - 12
on upper limb 20 - 26
total 29 - 35
Vertebrae
preanal
total 52 - 56

Fins

Dorsal fin(s)

Attributes
Fins number 2
Finlets No. Dorsal   0 - 0
Ventral  0 - 0
Spines total 6 - 8
Soft-rays total 35 - 38
Adipose fin absent

Caudal fin

Attributes more or less truncate; more or less normal

Anal fin(s)

Fins number 1
Spines total 0 - 0
Soft-rays total 36 - 39

Paired fins

Pectoral Attributes  more or less normal
Spines     0
Soft-rays   19 - 21
Pelvics Attributes  more or less normal
Position    thoracic  before origin of D1
Spines     
Soft-rays   
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