A revision of my Iahonak species. A total revision mind you. This time around, I've made them look a little more reptilian in nature, even though they are actually much more like mammals. Their bodies are slighter and more adapted for their planet's tidally locked environment.
A few additions I really liked were the opercalum breathing holes on the area below the flexible ridges down their abdomens. This allows for better air intake and functions as their primary point for taking in air. Their mouth actually only expels or takes in air to swallow or make sound, and cough up phlegm. Another addition is the function of their "nose". Instead of working like ours, sensing smell, the Iahonak nose actually detects infrared light. The skin making up the front of the nose is thin, and also distributes heat back towards the head, minimizing interference while protecting the delecate organs inside. A "lid" that blocks infrared light from reaching the inside of the nose can slide up, allowing them to 'see' in the infrared spectrum.
A couple sources of inspiration here were the quarians, which provided the initial idea of the race; and the kinecelerans, which provided the basic template I used. Oh, and the Banshees from avatar, which provided the idea for their opercalum breathing holes.
Feel free to critique (constructively)! I'm trying to make them seem slightly realistic (it's sci-fi, so realism can be thrown to the wind in some areas).