Typical halichondriid structure, with or without multispicular tracts - OR -
Multispicular tracts - OR -
Heavy reticulation made of multispicular tracts, very dense with much spicule confusion and often with a rock-like consistency. |
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Reticulated skeleton. May have some spicule confusion but this never really obscures the basic reticulate pattern.
Skeletal structure may at times appear thick and firm, but always obviously reticulate, compressible.
Never with a rock-like consistency.
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