Retilamina
Retilamina DEBRENNE& JAMES, 1981
Specimen-type: Retilamina amourensis holotype, DEBRENNE& JAMES, 1981, pl. 54, fig. 4
Systematics:
Order: ARCHAEOCYATHIDA Okulitch, 1935
Suborder: ARCHAEOCYATHINA Okulitch, 1935
Superfamily: DICTYOCYATHOIDEA Taylor, 1910
Family: DICTYOCYATHIDAE Taylor, 1910
Note:
Upper wall corresponds to outer wall and Lower wall to inner wall.
Retilamina
Outer wall
- Shape of carcass perforations openings (OW/SW) : Irregular
- Presence of carcass external plates: outer wall or single wall (OW/SW) : None
- Size of carcass pores (OW/SW) : Uniform size
- Repartition of carcass pores (OW/SW) : Homogeneous repartition ; Heterogeneous repartition
- Type of carcass perforations: outer wall or single wall (OW/SW) : Pores
- Presence of carcass bumps: outer wall or single wall (OW/SW) : None
- Presence of stipules (OW/SW) : None
- Shape of morphological tubes (OW/SW) : None
- Structure of outer carcass wall (OW/SW) : Carcass wall well defined
- Repartition types of carcass pores (OW/SW) : Straight rows of pores
- Type of additional sheath (OW/SW) : None
- Rows number of carcass perforations per intersept (OW/SW) : 1 row per intersept only
- Subdivision of carcass perforations openings (OW/SW) : Without subdivision
Inner wall
- Shape of carcass perforations openings (IW) : Irregular
- Rows number of carcass pores per intertabula (IW) : No tabula
- Type of carcass perforations: inner wall (IW) : Pores
- Building of carcass perforations (IW) : Without participation of vertical structures
- Presence of carcass external plates: inner carcass wall (IW) : None (external plates and/or inner wall)
- Shape of morphological tubes (IW) : None
- Structure of inner carcass wall (IW) : Carcass wall well defined
- Type of additional sheath (IW) : None
- Presence of stipules (IW) : None
- Rows number of carcass perforations per intersept (IW) : 1 row per intersept only
- Subdivision of carcass perforations openings (IW) : Without subdivision
Intervallum
- Presence of intervallar cells : None
- Type of links between intervallar structures : Synapticulae
- Presence of vertical intervallar structures : Present
- Presence of tabulae : none
- Type of vertical intervallar structures : Pseudotaeniae ; Dictyonal network
- Repartition of vertical intervallar structures pores : ?
- Porosity type of vertical intervallar structures : Coarsely porous
- Pores shape of vertical intervallar structures : Circular pores ; Tetragonal pores
- Repartition of synapticulae : At each interpore node
Others informations
- Number of walls : 2
- Stratigraphical extension : Botoman
- Geographical repartition : Canada ; Mexico ; USA
- Shape of cup bulges : None
- Presence of chambers : None
- Type of habitus : Solitary ; Modular
- Structure of central Cavity (or internal if one wall) : Empty
- Presence of thorny corolla : None
- Botoman : 2
- Type of modularity : Branching by external budding ; Branching by longitudinal subdivisions
- Cup shapes : Domal
- Type of other aquiferous unit : Chimneys ; None
Systematic
- Orders : Archaeocyathida
- Superfamillies inside the Archaeocyathina : Dictyocyathoidea
- Suborders inside the Archaeocyathida : Archaeocyathina
- Shape of carcass perforations openings (OW/SW) : Irregular
- Cup shapes : Domal
- Famillies inside the Archaeocyathina : Dictyocyathidae
External view
- Cup shapes : Domal
- Shape of cup bulges : None
- Structure of outer carcass wall (OW/SW) : Carcass wall well defined
- Type of modularity : Branching by external budding ; Branching by longitudinal subdivisions
- Type of habitus : Solitary ; Modular
- Size of carcass pores (OW/SW) : Uniform size
- Presence of carcass bumps: outer wall or single wall (OW/SW) : None
- Presence of carcass external plates: outer wall or single wall (OW/SW) : None
- Presence of carcass external plates: inner carcass wall (IW) : None (external plates and/or inner wall)
- Presence of thorny corolla : None
- Type of additional sheath (OW/SW) : None
- Type of additional sheath (IW) : None
- Repartition of carcass pores (OW/SW) : Homogeneous repartition ; Heterogeneous repartition
- Repartition types of carcass pores (OW/SW) : Straight rows of pores
- Shape of carcass perforations openings (OW/SW) : Irregular
- Presence of chambers : None
- Type of other aquiferous unit : Chimneys ; None
- Subdivision of carcass perforations openings (OW/SW) : Without subdivision
- Number of walls : 2
Transverse section
- Shape of cup bulges : None
- Structure of outer carcass wall (OW/SW) : Carcass wall well defined
- Structure of inner carcass wall (IW) : Carcass wall well defined
- Number of walls : 2
- Type of habitus : Solitary ; Modular
- Type of carcass perforations: outer wall or single wall (OW/SW) : Pores
- Presence of carcass bumps: outer wall or single wall (OW/SW) : None
- Building of carcass perforations (IW) : Without participation of vertical structures
- Type of carcass perforations: inner wall (IW) : Pores
- Structure of central Cavity (or internal if one wall) : Empty
- Type of vertical intervallar structures : Pseudotaeniae ; Dictyonal network
- Presence of vertical intervallar structures : Present
- Presence of thorny corolla : None
- Repartition of synapticulae : At each interpore node
- Type of links between intervallar structures : Synapticulae
- Presence of intervallar cells : None
- Presence of tabulae : none
- Type of other aquiferous unit : Chimneys ; None
- Presence of carcass external plates: outer wall or single wall (OW/SW) : None
- Presence of carcass external plates: inner carcass wall (IW) : None (external plates and/or inner wall)
- Rows number of carcass perforations per intersept (OW/SW) : 1 row per intersept only
- Rows number of carcass perforations per intersept (IW) : 1 row per intersept only
- Porosity of vertical intervallar structures : Multiperforate
Longitudinal section
- Shape of cup bulges : None
- Structure of outer carcass wall (OW/SW) : Carcass wall well defined
- Structure of inner carcass wall (IW) : Carcass wall well defined
- Number of walls : 2
- Type of modularity : Branching by external budding ; Branching by longitudinal subdivisions
- Type of habitus : Solitary ; Modular
- Type of carcass perforations: outer wall or single wall (OW/SW) : Pores
- Presence of carcass bumps: outer wall or single wall (OW/SW) : None
- Presence of carcass external plates: outer wall or single wall (OW/SW) : None
- Cup shapes : Domal
- Type of carcass perforations: inner wall (IW) : Pores
- Structure of central Cavity (or internal if one wall) : Empty
- Presence of carcass external plates: inner carcass wall (IW) : None (external plates and/or inner wall)
- Shape of morphological tubes (IW) : None
- Type of vertical intervallar structures : Pseudotaeniae ; Dictyonal network
- Repartition of vertical intervallar structures pores : ?
- Porosity type of vertical intervallar structures : Coarsely porous
- Pores shape of vertical intervallar structures : Circular pores ; Tetragonal pores
- Presence of vertical intervallar structures : Present
- Presence of thorny corolla : None
- Repartition of synapticulae : At each interpore node
- Type of links between intervallar structures : Synapticulae
- Presence of intervallar cells : None
- Presence of tabulae : none
- Type of other aquiferous unit : Chimneys ; None
- Presence of chambers : None
- Type of additional sheath (OW/SW) : None
- Type of additional sheath (IW) : None
- Presence of stipules (IW) : None
- Shape of morphological tubes (OW/SW) : None
- Rows number of carcass pores per intertabula (IW) : No tabula
- Porosity of vertical intervallar structures : Multiperforate
Oblique section
- Shape of cup bulges : None
- Structure of outer carcass wall (OW/SW) : Carcass wall well defined
- Structure of inner carcass wall (IW) : Carcass wall well defined
- Number of walls : 2
- Type of habitus : Solitary ; Modular
- Size of carcass pores (OW/SW) : Uniform size
- Type of carcass perforations: outer wall or single wall (OW/SW) : Pores
- Presence of carcass bumps: outer wall or single wall (OW/SW) : None
- Presence of stipules (OW/SW) : None
- Shape of morphological tubes (OW/SW) : None
- Rows number of carcass pores per intertabula (IW) : No tabula
- Cup shapes : Domal
- Building of carcass perforations (IW) : Without participation of vertical structures
- Type of carcass perforations: inner wall (IW) : Pores
- Structure of central Cavity (or internal if one wall) : Empty
- Shape of morphological tubes (IW) : None
- Type of vertical intervallar structures : Pseudotaeniae ; Dictyonal network
- Repartition of vertical intervallar structures pores : ?
- Porosity type of vertical intervallar structures : Coarsely porous
- Pores shape of vertical intervallar structures : Circular pores ; Tetragonal pores
- Presence of vertical intervallar structures : Present
- Presence of thorny corolla : None
- Repartition of synapticulae : At each interpore node
- Presence of intervallar cells : None
- Presence of tabulae : none
- Presence of chambers : None
- Type of other aquiferous unit : Chimneys ; None
- Presence of carcass external plates: outer wall or single wall (OW/SW) : None
- Presence of carcass external plates: inner carcass wall (IW) : None (external plates and/or inner wall)
- Type of additional sheath (OW/SW) : None
- Type of additional sheath (IW) : None
- Presence of stipules (IW) : None
- Rows number of carcass perforations per intersept (OW/SW) : 1 row per intersept only
- Rows number of carcass perforations per intersept (IW) : 1 row per intersept only
- Shape of carcass perforations openings (IW) : Irregular
- Porosity of vertical intervallar structures : Multiperforate
- Type of links between intervallar structures : Synapticulae
- Shape of carcass perforations openings (OW/SW) : Irregular
- Subdivision of carcass perforations openings (OW/SW) : Without subdivision
- Subdivision of carcass perforations openings (IW) : Without subdivision
Tangential section
- Shape of carcass perforations openings (OW/SW) : Irregular
- Size of carcass pores (OW/SW) : Uniform size
- Repartition of carcass pores (OW/SW) : Homogeneous repartition ; Heterogeneous repartition
- Shape of carcass perforations openings (IW) : Irregular
- Presence of thorny corolla : None
- Repartition of vertical intervallar structures pores : ?
- Porosity type of vertical intervallar structures : Coarsely porous
- Pores shape of vertical intervallar structures : Circular pores ; Tetragonal pores
- Repartition types of carcass pores (OW/SW) : Straight rows of pores
- Subdivision of carcass perforations openings (OW/SW) : Without subdivision
- Subdivision of carcass perforations openings (IW) : Without subdivision