Dados morfológicos de Malapterurus electricus
Chaves de identificação
Abnormalities
Ref. principal Norris, S.M., 2002
Aparência se refere a
Bones in OsteoBase

Atributos do sexo

órgãos especializados
Aparência diferente
Cores diferentes
Notas

Características descritivas dos juvenis e adultos

Características determinantes none
Forma lateral do corpo fusiform / normal
Seção transversal circular
Perfil dorsal da cabeça more or less straight
Tipo de olhos more or less normal
Tipo de boca/focinho more or less normal
Posição da boca terminal
Type of scales
Diagnose

Diagnosis: tooth patches narrow; pectoral fin placed near body mid-depth; 7-8 branched caudal fin rays (Ref. 44050). 9-11 anal-fin rays, usually 10-11; 38-41 total vertebrae, usually 39-41 (Ref. 57130). Caudal saddle and bar pattern not present in adults (Ref. 57130), poorly developed in all ages (Ref. 44050). Flank and dorsum in adults and young marked with large blotches (some up to 4-5 times eye diameter); caudal fin of adults generally same color as flank ground color or slightly darker, larger specimens usually with spots or blotches in caudal fin (Ref. 44050, 57130).

Description: body fusiform (Ref. 57130). Head deep and cylindrical; lower jaw only slightly prominent; 16-18 abdominal and 21-24 caudal vertebrae; 19 caudal fin rays (arrangement: ii-7-8-ii) (Ref. 44050, 57130).

Colouration: dorsum tan or occasionally light grey; venter light tan; body bicolored but without sharp demarcation between dorsal and ventral shades; dorsum and flank marked with scattered spots and larger blotches, some as large as 4-5 times an eye diameter; blotching typically denser posteriad, where blotches may merge or overlap; venter usually unmarked, or with a few small spots; small spots usually present on paired fins of specimens larger than 15cm SL; caudal and anal fins well marked with small spots, plus some larger blotches on the caudal fin, in specimens of 15cm SL and larger; caudal fin bears a dusky bar with a pale basal crescent and a clear distal margin; dusky bar is narrow in juveniles and much broader in adults; pale basal crescent may be poorly developed in large adults, with the entire fin pigmented in the flank ground shade; caudal saddle and bar faint in juveniles, with the pale interspace matching the ground color; juveniles show a bar at the caudal fin base, and a less distinct saddle, extending ventrad to the body mid-depth; saddle has disappeared by 10cm SL, caudal bar may persist (faintly) in specimens up to 15cm SL; tiny juveniles (10-20mm SL) are largely unpigmented (Ref. 44050).

Facilidade de Identificação

Características merísticas de Malapterurus electricus

Linhas laterais 1 Interrompido(a): No
Escamas na linha lateral
Escamas da linha lateral com poros
Escamas em séries laterais
Fileiras de escamas acima da linha lateral
Fileiras de escamas abaixo da linha lateral
Escamas em torno do pedúnculo caudal
Barbilhões 8
Aberturas branquiais (tubarões/raias apenas)
Rastros branquiais
no membro inferior 7 - 22
no membro superior 1 - 4
total 10 - 25
Vértebras
Pré-anal
total 38 - 41

Nadadeiras

Nadadeira(s) dorsal(dorsais)

Atributos greatly reduced or absent
Número de nadadeiras
Nro. de pínulas Dorsal   0
Ventral  0
Total de espinhos 0
Total de raios 0
Nadadeira adiposa present

Nadadeira caudal

Atributos more or less truncate; more or less normal

Nadadeira(s) anal(anais)

Número de nadadeiras 1
Total de espinhos 0
Total de raios 9 - 11

Nadadeiras pares

Peitoral Atributos  more or less normal
espinhos     0
raios   9
Pélvicas Atributos  more or less normal
Posição    abdominal
espinhos     0
raios   6
Ref. principal (p.ex. 9948)
Glossário ( p.ex. cephalopods )
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cfm script by eagbayani, 17.10.00, php script by rolavides, 13/03/08 ,  modificado pela última vez por sortiz, 06.27.17