The lorica of this species is barrel-shaped, swollen at its posterior third, prolonged posteriorly in two stout and parallel lateral spines, their length is usually more than 1/2 the length of the body without spines. Greatest width/length of the body (without spines) ratio = 1. Anterior dorsal margin with six well developed spines, medians longest and bent outwards, laterals slightly divergent. Anterior ventral margin undulate, somewhat elevated toward the center, with a median sinus. The ventro-posterior portion of the lorica forms a typical tubular sheath surrounding the foot opening. Lorica markedly stippled or pustulate.
When viewed from the dorsal side the outline of the animal is trapezoidal, its greatest width being in the lumbar region. It has four occipital spines, the two medians being curved outwards, and having the appearance of antlers; the two outer spines are straight and slightly shorter than the central pair. Between the outer spines on each side a small saw tooth can be seen, and on the corresponding anterior ventral edge are two similar teeth. The posterior spines are long and sharp, and when viewed from the dorsal side make an angle of approximately 30 degrees, with a median line passing lengthwise through the body. Two short recurved spines protect the foot opening. The foot, which is often longer than the animal, is wrinkled, and has the usual two toes.
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