Subspecies and Distribution. C.c.calvus1.GeoffroySaint-Hilaire,1847—BrazilianAmazon,mainlyrestrictedtothelargefluvialislandborderedbytheriosJapura,Auati-Parana,andSolimoes. C.c.novaesiHershkovitz,1987—BrazilianAmazon,restrictedtotheupperRioJurua(Sbank),betweentheriosEiruandTarauacainthestateofAmazonas.C.c¢.rubicundus1.GeoffroySaint-Hilaire&Deville,1848—WAmazonBasininBrazil(disjunctdistribution,withonepopulationintheJapura-Solimoesinterfluvium,WoftheAuati-Parana,andanotheralongtheRioSolimoes,