List Terms by Category
Macroscopical Features: Habit, Surface Characteristics, and Consistency
Anatomy and Aquiferous System
Cytology
Reproduction
Architecture of the Skeleton and Spicules of Hexactinellida
Calcareous Spicules and Calcareous Spicule Skeleton
Architecture of the Skeleton of Demospongiae
Calcareous Rigid Skeleton
Spicules of Demospongiae
Spicule Types of "Lithistids"
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