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head: no pores, many papillaeD1: VIIpelvics separatescales: only rear ~ 1/2 body
C base - large, rough scales -
head broad, pores with flapsD1: VIIpelvics separatescales smooth, imbedded, on rear 3/4 body only
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head depressedD1: VIIC: oval, longer than headpelvics separatescales rough, large, only on body, 4 large on C base