This creature was identified as a snake in the final draft script of "Rogue Planet" and was scripted to slither and glow "with an eerie blue bioluminescence." Later in the script, CommanderTucker referred to "snakes [that] glow in the dark." This was changed, however, so that, in the final version, he instead mentions "bugs [that] glow in the dark."
Later that year, the same images were seen by Lore, as he was using the library computer of the Enterprise-D to learn more of the vessel and its customs. (TNG: "Datalore")
The fossils of these two types of martian insects were seen on library computer viewscreens in the first season of Star Trek: The Next Generation without any description. The okudagram images were taken from the Spaceflight Chronology. In the book, the insect remains were described as silicon-based lifeforms about three centimeters long. Their age was silicon isotope dated to be several million years. The fossils were discovered after they were uncovered by a sandstorm in the year 2021. This date of discovery of a silicon-based lifeform would contradict the fact that silicon-based life was considered only a theoretical possibility until 2267, as established in TOS: "The Devil in the Dark".