| morphological and physiological development of anterior thoracic stretch receptors in two isopods, armadillidium vulgare and ligia exotica. | abdominal muscle receptor organs (mros) monitor the position and movement of abdomen in crustaceans. thoracic segments of decapods are fused and immovable. it is speculated that mros had retrograded simple shape, n-cells that lost receptor muscles, a receptor cell and accessory nerves. we focused on the effect of segmental movement in respect to thoracic n-cells and mros in isopods that have movable thoracic segments. armadillidium vulgare rolled up its body segments. ligia exotica swam by quick ... | 2007 | 17473927 |