| comparative ultrastructure of pretarsi in five calyptrate species. | pretarsi are the most important structures that allow flies to walk on various smooth surfaces and act as contact sensory organs. the pretarsal ultrastructure, including adhesive pads, claws, unguitractors, and bristles, of five calyptrate species are presented and described in detail, including calliphora calliphoroides (rohdendorf, 1931), lucilia sericata (meigen, 1826), sarcophaga portschinskyi (rohdendorf, 1937), muscina stabulans (fallen, 1817) and portschinskia magnifica pleske, 1926. two ... | 2016 | 26916893 |