Wriggling abominations seen in Konami's 1991 Operation C Gameboy video game (the 'C' stands for 'Contra'). These monstrous organisms were genetically engineered by Black Viper, presumably by mixing alien DNA with that of Earth insects. Experimental Squid Lice Mandiabla can only be encountered in the fourth stage of the game, where they crawl forth from the walls to attack Contra operative Corporal Lance "Scorpion" in great numbers. In close quarters, these mutant arthropods can easily slice an adult human's legs out from under them with their pincer jaws. Fortunately, they're relatively slow, so this unpleasant fate can usually be avoided, so long as there is room to maneuver around them. Unfortunately, the creatures can also strike from a distance by vomiting up pairs of floating acidic spores that dissolve flesh on contact.
For comparison/informational purposes, below are some images from various Operation C media (more information on mouse-over):
(In no particular order of importance.)
« Return To My Konami Video Game Fan Art Gallery