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Fig. 4. Muscles attaching to the base of each antenna in Panulirus argus.
Anterior is towards the bottom of the page. (A) Dorsal view with half the
dorsal carapace removed to show the promotor (P) and lateral levator (LL). (B)
Sagittal view of the promotor medial lobe (Pm), promotor lateral lobe (Pl),
lateral levator, depressor A (Da) and depressor D (Dd). The epistome (E) forms
an internal skeleton with a prominent midline process (Ep) upon which
depressor A attaches. (C) Dorsal view with dorsal carapace, promotor and
lateral levator removed to show depressor A (Da), depressor C (Dc) and
depressor D (Dd). Drawing based on specimen with 64 mm carapace length.