A (Very) Partial Pictorial History of Lizard Men

Lizard men were introduced into Dungeons & Dragons in the pages of its first supplement, Greyhawk (1975). The first illustration of them appears on the inside cover of Supplement I, provided by Greg Bell. As we'll see, this image established the general outlines of what D&D's lizard men look like and nearly all of those that follow will use it as the foundation on which to build their own specific interpretations.

The next time we see a lizard man is the Monster Manual (1977), with artwork provided by Dave Trampier. There's a lot of similarity between Tramp's depiction and that of Bell above, like the tattered loincloth, spiny ridges on the head, and serpentine tongue. This is my default mental image of a lizard man, probably because it's the first one I ever saw. 

In the 1980 Rogues Gallery , Jeff Dee provided an illustration of a lizard man – or, rather, a human who was reincarnated as a lizard man by druidic magic. Aside from the additions of bracers and pirate boots, the latter of which are quite common in Dee's artwork, this looks pretty similar to the work of both Bell and Trampier.  That same year, Grenadier Models acquired the AD&D miniatures license, producing numerous boxed sets of 25mm figures. One of these sets, Denizens of the Swamp, featured lizard men on its cover by Ray Rubin. The lead lizard man looks almost identical to Trampier's version from the Monster Manual.  The Sinister Secret of Saltmarsh was published in 1981 and contains this piece by Harry Quinn. Once again, we can see the influence of both Bell and Trampier, though I'd say Trampier has the upper hand. Look, for example, at the skull necklaces the lizard men are wearing, as well as their shields. The module's immediate sequel, Danger at Dunwater (1982), also features lizard man art, this time depicted by Timothy Truman. Truman's take on the monster is much more bestial and savage. The same year, the AD&D Monster Cards appeared. Jim Roslof offereed us his take on the lizard man, which doesn't differ all that much from the one found in the Monster Manual. Note again the presence of the skull necklace. The 1983 Dungeons & Dragons cartoon series featured lizard men several times during the course of its run. Here's a trio of them, one of which (again) wears a skull necklace.
Jim Holloway's depiction of lizardmen in the AD&D Second Edition Monstrous Compendium is notable for downsizing the head and back ridges while also extending them to the end of the tail. Holloway also shortened the snout and shrank the size of the mouth. 
Tony DiTerlizzi's interpretation of lizard men appeared in the 1993 Monstrous Manual. It's very distinctive in many ways, such as the legs. Interestingly, DiTerlizzi gave the lizard man a polearm that looks very similar to the one Greg Bell included in his original illustration. I wonder if this was intentional. Lizard men are not monsters about which I think a great deal, so it was instructive to take a look at their depiction during the TSR era. While there are undoubtedly many I've not included here – feel free to post your favorites in the comments below – what strikes me most about the ones I have included is how similar they are. Greg Bell laid a foundation in 1975 that Dave Trampier then built upon; all subsequent artists have either directly copied or slightly altered their work.