Som jag ser det så kallas alla arter i Pterophyllum för skalarer dvs.
Pterophyllum scalare = skalar
Pterophyllum altum = altumskalar
Pterophyllu leopoldi = spetsnosskalar
Sven skriver följande på
http://www2.nrm.se/ve/pisces/acara/pterophy.shtml
Pterophyllum altum is known only from black and clear water tributaries of the upper Rio Negro and upper Rio Orinoco in Colombia, Venezuela and Brazil. Pterophyllum leopoldi has been collected in only a few localities along the middle Amazon River and in the upper Essequibo drainage. Several Pterophyllum species confused under the name of P. scalare are known from the Amazon drainage lowland floodplain in Colombia, Brazil and Peru, and also from the Oyapock (French Guiana) and Essequibo (Guyana) drainages.
Är "peru altum" den enda formen av Pterophyllum i Peru? Finns det risk att Pterophyllum sp., Peru gäller mer än en sorts fisk eller är detta den "korrekta" benämningen på "Peru altum"?