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

Atributos do sexo

órgãos especializados
aparência diferente
cores diferentes
Notas

Características descritivas dos juvenis e dos adultos

Características determinantes
Forma lateral do corpo elongated
Secção transversal circular
Perfil dorsal da cabeça
Tipo de olhos
Tipo de boca/focinho
Posição da boca
Type of scales
Diagnose

Diagnosis: body elongate and cylindrical; tooth patches narrow; vertically based pectoral fins positioned at the body mid-depth; 8-11 anal-fin rays; usually more than 17 gill rakers on first arch; 2 ventral unbranched and 7-8 branched caudal-fin rays; 8-11 pectoral-fin rays; caudal saddle and bar pattern well developed in juveniles and young; caudal fin darkly pigmented in adults; caudal saddle and bar merged dorsally in specimens in which they are still visible (Ref. 44050).

Description: head deep and cylindrical; body elongate and fusiform, not depressed; eyes lateral and relatively large; jaws equal; 16-18 abdominal vertebrae; 21-24 caudal vertebrae; 19 caudal-fin rays (arrangement usually ii-7-8-ii, but also iii-7-8-ii and ii-6-8-ii) (Ref. 44050, 57130).

Coloration: body and head bicolored; dorsum light brown (or grey or blue-grey), with venter much lighter, but still marked with a diffuse speckling of dark pigment; underside of head dusky; dorsum and flank well marked with mostly small spots, few more than 2-3 times an eye diameter, with a few small spots scattered on venter; paired fins dusky, rarely bearing spots; anal fin darkly pigmented throughout with a clear distal margin, often also bearing scattered small spots; caudal fin darkly pigmented with a well defined pale distal margin, and a pale basal crescent in young; caudal saddle and bar pattern prominent in juveniles and young, growing fainter with increasing size and largely gone by 140mm SL; when still visible, the caudal bar and saddle are broadly merged across the dorsal 2/3 of the flank, leaving a fairly small portion of the pale interspace visible ventrally; adipose fin darkly pigmented, with a pale distal rim; tiny juveniles are largely unpigmented with very faint spotting or caudal barring (Ref. 44050).

Facilidade de identificação

Características merísticas de Malapterurus stiassnyae

Linhas laterais interrompido: 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
Fissuras branquiais (tubarões/raias apenas)
Raios branquiais
no membro inferior 15 - 23
no membro superior 2 - 3
total 18 - 26
Vértebras
Pré-anal
total 38 - 42

Barbatana

Barbatana(s) dorsal(dorsais)

Atributos greatly reduced or absent
Número de barbatanas
No. de pínulas Dorsal   0
Ventral  0
Total de espinhos 0
Total de raios moles 0
Barbatana adiposa present

Barbatana caudal

Atributos more or less truncate; more or less normal

Barbatana(s) anal(anais)

Número de barbatanas 1
Total de espinhos 0
Total de raios moles 8 - 11

Barbatana pares

Peitoral Atributos  more or less normal
espinhos     0
Raios moles   8 - 11
Pélvica Atributos  more or less normal
posição    abdominal
espinhos     0
Raios moles   6
Ref. principal (ex. 9948)
Glossário ( 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