part of develops from mesothoracic segment metatarsus mesothoracic tarsal segment mesothoracic metatarsus First tarsal segment of the mesothoracic leg. Proximally, it articulates with the tibia and distally with the second tarsal segment. Its surface is covered with eight longitudinal rows of bristles, with ventral rows 1 and 8 having thicker and shorter bristles. In contrast to the pro- and metathoracic metatarsi. T2 Ts1 mesothoracic basitarsus fly_anatomy.ontology mesothoracic tarsal segment 1 FBbt:00004691 FBbt:00004692 T2 tarsal segment 1 https://www.ento.csiro.au/biology/drosophila/melanogaster.html?mesobasitarsus presumptive mesothoracic metatarsus