Ordovician – Triassic
Labechiida is an extinct order of stationary epifaunal suspension feeders which have been interpreted to have hosted symbiotic algae in their tissues
Characteristics of the Order
- Cysts defined by long-low to upwardly convex blister-like plates
- Upwardly inflected pillars with rounded, irregular, or flanged cross sections
- Mamelons and mamelon columns may occur
- Astrohizae rarely well developed
- Stromatoporoids with cysts usually defined by long-low to upwardly convex, blister-like plates, and intersected by continuous, upwardly inflected pillars with rounded, irregular or flanged cross-sections, and/or denticles confined to tops of cyst plates; in a few latilaminate forms, skeletal layers become much thickened; mamelons and mamelon columns may occur; astrohizae rarely well developed; microstructure usually compact and imperforate.
- The primary horizontal structures are dissepiments rather than laminae.