Yay, so this is Sapphirus's classic form, it's one of her most known/common shapeshift feral form. The species is called "Feligon" a mix I came up with from around 1999 along with the Wolfagon mix, which isn't really used as a form anymore. Here's one of the older pics...

Old pic (Most recent update): http://isapphirus.deviantart.com/art/Sapphirus-Feligon-other-form-313041533

Way older pic: http://isapphirus.deviantart.com/art/Sapph-s-Feral-forms-pg-1-70562848

Note: Sapphirus only likes feral shapeshifting, never anthro or anything.