Gatagacyathus
Gatagacyathus DEBRENNE& A. ZHURAVLEV, 1992a
Specimen-type: Gatagacyathus mansyi holotype, DEBRENNE& A. ZHURAVLEV, 1992a, pl. 1, fig. 4
Systematics:
Order: ARCHAEOCYATHIDA Okulitch, 1935
Suborder: DICTYOFAVINA Debrenne, 1991
Superfamily: GATAGACYATHOIDEA Debrenne& A. Zhuravlev, 1992
Family: GATAGACYATHIDAE Debrenne& A.Zhuravlev, 1992
Gatagacyathus
Outer wall
- Shape of carcass perforations openings (OW/SW) : Simple only
- 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
- 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) : 2 AND more than 2 rows per intersept
- Subdivision of carcass perforations openings (OW/SW) : Incipient pore 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 not 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 : Present
- Type of links between intervallar structures : Synapticulae
- Presence of vertical intervallar structures : None
- Presence of tabulae : none
- Section shape of intervallar cells : Hexagonal
- Repartition of synapticulae : Tangential at intervallar cells
- Type of Intervallar cells : Calicles
- Number of pores rows per facet (intervallar cells) : One row of pores on each facet
Others informations
- Number of walls : 2
- Stratigraphical extension : Botoman
- Geographical repartition : Canada ; 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 interparietal budding ; Branching by external budding ; Branching by longitudinal subdivisions ; Massive pseudocolony
- Cup shapes : Cylindrical-conical
- Type of other aquiferous unit : None
Systematic
- Orders : Archaeocyathida
- Superfamillies inside the Dictyofavina : Gatagacyathoidea
- Suborders inside the Archaeocyathida : Dictyofavina
- Shape of carcass perforations openings (OW/SW) : Simple only
- Cup shapes : Cylindrical-conical
- Famillies inside the Dictyofavina : Gatagacyathidae
External view
- Cup shapes : Cylindrical-conical
- Shape of cup bulges : None
- Structure of outer carcass wall (OW/SW) : Carcass wall well defined
- Type of modularity : Branching by interparietal budding ; Branching by external budding ; Branching by longitudinal subdivisions ; Massive pseudocolony
- 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
- Repartition types of carcass pores (OW/SW) : Straight rows of pores
- Shape of carcass perforations openings (OW/SW) : Simple only
- Presence of chambers : None
- Type of other aquiferous unit : None
- Subdivision of carcass perforations openings (OW/SW) : Incipient pore 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 not 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
- Presence of vertical intervallar structures : None
- Presence of thorny corolla : None
- Repartition of synapticulae : Tangential at intervallar cells
- Type of links between intervallar structures : Synapticulae
- Presence of intervallar cells : Present
- Presence of tabulae : none
- Type of other aquiferous unit : None
- Type of Intervallar cells : Calicles
- 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) : 2 AND more than 2 rows per intersept
- Rows number of carcass perforations per intersept (IW) : 1 row per intersept only
- Section shape of intervallar cells : Hexagonal
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 not well defined
- Number of walls : 2
- Type of modularity : Branching by interparietal budding ; Branching by external budding ; Branching by longitudinal subdivisions ; Massive pseudocolony
- 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 : Cylindrical-conical
- 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
- Presence of vertical intervallar structures : None
- Presence of thorny corolla : None
- Repartition of synapticulae : Tangential at intervallar cells
- Type of links between intervallar structures : Synapticulae
- Presence of intervallar cells : Present
- Presence of tabulae : none
- Type of other aquiferous unit : None
- Type of Intervallar cells : Calicles
- 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
- Section shape of intervallar cells : Hexagonal
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 not 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 : Cylindrical-conical
- 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
- Presence of vertical intervallar structures : None
- Presence of thorny corolla : None
- Repartition of synapticulae : Tangential at intervallar cells
- Presence of intervallar cells : Present
- Presence of tabulae : none
- Presence of chambers : None
- Type of other aquiferous unit : None
- Type of Intervallar cells : Calicles
- 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) : 2 AND more than 2 rows per intersept
- Rows number of carcass perforations per intersept (IW) : 1 row per intersept only
- Shape of carcass perforations openings (IW) : Irregular
- Type of links between intervallar structures : Synapticulae
- Section shape of intervallar cells : Hexagonal
- Shape of carcass perforations openings (OW/SW) : Simple only
- Subdivision of carcass perforations openings (OW/SW) : Incipient pore subdivision
- Subdivision of carcass perforations openings (IW) : Without subdivision
- Number of pores rows per facet (intervallar cells) : One row of pores on each facet
Tangential section
- Shape of carcass perforations openings (OW/SW) : Simple only
- Size of carcass pores (OW/SW) : Uniform size
- Repartition of carcass pores (OW/SW) : Homogeneous repartition
- Shape of carcass perforations openings (IW) : Irregular
- Presence of thorny corolla : None
- Section shape of intervallar cells : Hexagonal
- Repartition types of carcass pores (OW/SW) : Straight rows of pores
- Subdivision of carcass perforations openings (OW/SW) : Incipient pore subdivision
- Subdivision of carcass perforations openings (IW) : Without subdivision
- Number of pores rows per facet (intervallar cells) : One row of pores on each facet