Figure 17
Type of distribution of skeletal arches (original).
I-III) Pseudocubus with an undeveloped spine Vert; IV, V) Pseudocubus with spine Vert; VI) Carpocaniinae; VII) Artostrobiinae; VIII) Pterocorydinae; IX) Cannobotryidae; X) Triospyridae; XI) Clathromitrinae; XII) Sethoperinae; XIII) Lophophaeninae.
For other designations see figs. 8, 10 and in the text.
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