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Fig. 6. Comparison of appendicular muscles revealed by MHC-tauGFP staining with the
leg musculature described by Miller. (A) Adult leg muscles (green) and tendons
(red) visualised by MHC-tauGFP and 1151-GAL4/UAS-DsRED staining, respectively.
(B) Schematic representation of appendicular muscles (green) and tendons
(red). Regions located between double-headed arrows, labelled 1-5, are
represented in the cross-sections shown in D. (C) Adult Drosophila
leg muscles identified by Miller and labelled according to Miller's
description (Miller, 1950).
Tarsal segments are devoid of muscles and harbour only the long tendon, 44. A
comparison of B and C reveals the presence of previously undescribed muscles
and tendons within the leg. These are the tarsus reductor muscles tarm1 and
tarm2, the long tendon muscles ltm1 and ltm2, and a femur depressor muscle,
fedm, as well as internal depressor and levator tendons in all leg segments.
This implies that the levator and the depressor muscle fibres attach to the
internal tendons and display an organisation that is different from that
proposed by Miller. (D) Schematic representation of cross-sections through
coxa (1), femur (2,3) and tibia (4,5) in the regions indicated in B. The
cross-sections show the locations of muscles and tendons with respect to the
dorsoventral and anteroposterior axes. Note that all of the levator muscles
are located dorsally, and the depressors ventrally. All names and
abbreviations of muscle and tendons are defined in
Table 1.
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