part of develops from metathoracic segment metatarsus metathoracic tarsal segment metathoracic metatarsus FBbt:00004714 T3 tarsal segment 1 FBbt:00004713 fly_anatomy.ontology T3 Ts1 metathoracic tarsal segment 1 metathoracic basitarsus First tarsal segment of the metathoracic leg. Proximally, it articulates with the tibia and distally with the second tarsal segment. Its surface is covered with eight longitudinal rows of bristles and with 11 transverse rows of bristles (TR) in the posterior compartment, between rows 1 and 1. https://www.ento.csiro.au/biology/drosophila/melanogaster.html?metabasitarsus presumptive metathoracic metatarsus