My megaphobema mesomelas died in the middle of their molt. The night before I saw them on their back as they are shown in some of the pictures here. I noted that there was this werid yellow substance on their one side but other than noting it I did not think much more of it. But after waking I found them in exactly the same position. After pulling them out if the enclosure I took that fourth picutre a better close up shot of the yellow substance. I am not 100% sure which is why I am posting this but it appears that they had some complications during their molt...and died as a result.