Certainly no need to apologize. The Knudson Yellow Spider was a fly developed by Al Knudson for steelhead on the Rogue River in the 1930s. When he moved to Everett he brought it with him and it became a favorite for sea-run cutthroat on the Stillaguamish. His original pattern called for a yellow floss body and a superabundance of mallard flank for hackle, tied to curve back and over the body. It eventually became a "style" of fly and is commonly tied today with a variety of body materials (almost always chenille in various colors) and with various waterfowl feathers (teal, pintail, gadwall, etc.) for the hackle, usually much more sparsely applied than in the original.
The Reverse Spider was created by Mike Kinney in the '70s and differs largely in having the hackle tied in the reverse of the Knudson-style spiders; projecting out over the eye of the hook instead of flowing back along the shank. Is it some sort of lineal descendant of the Knudson Spider? Perhaps, but when I write about it I like to give Mike credit and often call it "Mike Kinney's Reverse Spider", cumbersome admittedly, but if you just call it the Reverse Spider most folks will understand what fly you're referring to.
