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Petrushevskaya 1971


Figure 19

Types of cephalic structure (original).
I-IX) Cephalises without a sagittal ring: I) semispherical (Carpocaniinae); II) flat (Lampromitra); III) slightly segmented (Artostrobiinae); IV) spherical (Eucyrtidiinae); V) complicated (Cannobotrydae); VI) hoodlike (Pterocorydinae); VII) inflated (Amphipyndax); VIII) Pyramidal (Clathromitrinae); IX) inflated (Lophophaeninae); X-XIV) cephalises with a sagittal ring; X) with an inner ring (Triospyrididae); XI) ring protrudes to the outside (Lophospyris); XII) increased in an anterior-posterior direction (Lithocircus); XIII) increased in an up-downward direction (Nephrospyris); XIV) complicated (Lamprospyris).
Other designations same as in fig. 10.