a) Lamellar gill found in the gill chamber of decapods, including anomurans; b) Depiction of the typical U direction of water flow in the gill chamber; c) depiction of the location of the gill chamber associated with the thoracic appendages of the anomurans. (Source: a) and b) are modified from Ruppert, Fox & Barnes, 2004; c) is a depiction by the author, Candice Selmanovic, 2016).