Morfologiska data för Petrocephalus catostoma
Bestämningsnycklar
Abnormalities
Main Ref. Kramer, B., R. Bills, P. Skelton and M. Wink, 2012
Utseende refererar till hane; hona
Bones in OsteoBase

Könskaraktärer

specialiserade organ
annat utseende always different morphology between mature adults
andra färger
Anmärkningar The anal fin of the mature male is broader than that of the mature female. It is inwardly indented from its anterior side. The ventral flank of the male body also in this region is curved inwards whereas that of the female is straight (Ref. 10608).

Karaktäristiska egenskaper hos juveniler och adulter

Särskilt slående egenskaper
Lateral kroppsform fusiform / normal
Tvärsnitt oval
Dorsal profil av huvudet
Ögontyp
Typ av mun/snyte
Munnens placering
Type of scales cycloid scales
Diagnos

Description: Body oval shape (Ref. 91771). Head broadly rounded with a small ventrally positioned subterminal mouth, situated ventral to the eye; head and body dorsolaterally compressed (Ref. 91771). Dorsal fin origin situated about two-thirds of standard length from snout, obliquely orientated, anteriorly higher and posteriorly lower, its distal margin crescentic with anterior two or three rays longer than posterior rays; 18-22 dorsal fin rays (Ref. 91771). Anal fin longer than dorsal fin, opposite dorsal fin with slightly more anterior origin, obliquely orientated, anteriorly lower and posteriorly higher, its anterior 10 or so rays longer than posterior ones, especially in males where they also appear stronger, its margin broadly rounded and rays posterior to first 10 with distal margin straight; 25-28 anal fin rays (Ref. 91771). Scales cycloid with reticulate striae, scales extending anteriorly to operculum and pectoral fins; scales on caudal peduncle circumference (Ref. 91771). Caudal peduncle slender, subcylindrical entire length, usually 19.5-23.9% of standard length.

Colour: Grey-silver, underside lighter, paired fins light and transparent, goldbrownish hue on back and tail section (Ref. 91771). In preservation it is light brown, back darker, underside fair (Ref. 91771).

Ease of Identification

Meristiska karaktäristika för Petrocephalus catostoma

Sidolinjer avbruten: No
Fjäll längs sidolinje 35 - 40
Porbärande fjäll längs sidolinje
Fjäll i lateralserie
Antal rader fjäll ovan sidolinje
Antal rader fjäll under sidolinje
Fjäll runt stjärtfensspole 11 - 16
Skäggtömmar
Gälspringor (endast hos hajar/rockor)
Gälräfständer
på undre del av gälbåge
på övre del av gälbåge
totalt
Ryggkotor
preanal
totalt

Fenor

Ryggfena/fenor

Egenskaper no striking attributes
Antal fenor 1
Antal småfenor Dorsal   
Ventral  
Totalt antal hårda fenstrålar 0 - 0
Totalt antal mjuka fenstrålar 18 - 22
Fettfena absent

Stjärtfena

Egenskaper forked; more or less normal

Analfena/fenor

Antal fenor 1
Totalt antal hårda fenstrålar 0 - 0
Totalt antal mjuka fenstrålar 25 - 28

Pariga fenor

Bröstfena Egenskaper  
Fenstrålar hårda     
Fenstrålar mjuka   
Bukfenor Egenskaper  
Position    
Fenstrålar hårda     
Fenstrålar mjuka   
Main Ref. (t.ex. 9948)
Ordlista ( t.ex. cephalopods )
Comments & Corrections
Tillbaka till Sök
cfm script by eagbayani, 17.10.00, php script by rolavides, 13/03/08 ,  senast uppdaterad av sortiz, 06.27.17