The three, once tiny Mexican redknee tarantulas (Brachypema smithi) obtained in January continue to grow and develop at different rates. The smallest one molted for the second time Saturday morning.
Unlike previously observed molts, the tarantula did not turn over onto its back, but rather emerged from an upright premolt stance. I haven’t seen that before, though I have read that likelihood of emergence issues and likelihood of molting-related mortality increase when molting occurs in this position.
Emergence occurred over a thirty minute period, though part of the cephalothorax remains attached to the abdomen of the newly emerged tarantula 24 hours later. I observed the same issue in one of this tarantula’s siblings.
Double-click the middle and final emergence images to see the molt process in greatest detail.