Its fibers pass dorsally from an extensive anterior attachment to insert on the pharyngeal raphe, the pharyngeal tubercle of the occipital bone.
Even on the bare question of the presence or absence of tubercle in a lung it often fails us; on questions of the age, extent, distribution and histological character of the tuberculous lesions it can tell us little.
The blood supply of the scaphoid comes from the radial artery, feeding the bone on the dorsal surface near the tubercle and scaphoid waist.
A terminal segment includes a tubercle that projects dorsally and an anus.
In the male, the genital tubercle is located adjacent to and caudal to the umbilicus, whereas the genital tubercle in the female is located just ventral to the tail.
The carapace, as well as the preabdomen, shows the intensely tuberculate cuticle sculpture typical of this species.
In young dorsal valves the median septum is lacking and the adductor scars are poorly differentiated, appearing as strongly tuberculate areas enclosed posterolaterally by the lateral ridges.
The tubercles have rounded surface and irregular shape.
In the first stage, ribs are strong and tuberculate and the whorl section is subtrapezoidal with divergent sides.
The outer surface of the egg is finely tuberculate .