Muchattocyathus
Muchattocyathus ROZANOV, 1976
Specimen-type: Muchattocyathus sibiricus holotype, F. DEBRENNE, M. DEBRENNE& ROZANOV, 1976, pl. 1, fig. 5
Systematics:
Order: AJACICYATHIDA R. Bedford& J. Bedford, 1939
Suborder: ERISMACOSCININA Debrenne, Rozanov& A. Zhuravlev, 1989
Superfamily: POROCOSCINOIDEA Debrenne, 1964
Family: TATIJANAECYATHIDAE Korshunov, 1976
Muchattocyathus
Outer wall
- Direction of carcass external plates (OW/SW) : Upwardly projecting
- Shape of carcass perforations openings (OW/SW) : ?
- Direction of carcass canals tubes (OW/SW) : Downwardly opening
- Presence of carcass external plates: outer wall or single wall (OW/SW) : Present
- Origin of carcass canals (OW/SW) : Limited to the carcass
- Type of carcass perforations: outer wall or single wall (OW/SW) : Canals
- Presence of carcass bumps: outer wall or single wall (OW/SW) : None
- Shape of carcass external plates (OW/SW) : ?
- Presence of stipules (OW/SW) : Present
- Shape of morphological tubes (OW/SW) : V-shaped
- Structure of outer carcass wall (OW/SW) : Carcass wall well defined
- Type of carcass external plates (OW/SW) : Bracts
- Shape of carcass canals tubes (OW/SW) : Straight
- Type of additional sheath (OW/SW) : None
- Rows number of carcass perforations per intersept (OW/SW) : More than 2 rows per intersept only
- Rims of carcass external plates (OW/SW) : Smooth
- Subdivision of carcass perforations openings (OW/SW) : Without subdivision
Inner wall
- Shape of carcass perforations openings (IW) : Simple
- Rows number of carcass pores per intertabula (IW) : Several rows of pores between two successive tabulae only
- Type of carcass perforations: inner wall (IW) : Pores
- Building of carcass perforations (IW) : Without participation of vertical structures
- Localization of carcass annuli according tabulae (IW) : Annuli between each tabulae only
- Presence of carcass external plates: inner carcass wall (IW) : Present
- Shape of morphological tubes (IW) : None ; S-shaped
- Shape of carcass external plates (IW) : S-shaped only
- Structure of inner carcass wall (IW) : Carcass wall well defined
- Type of carcass external plates (IW) : Annuli
- Direction of carcass external plates (IW) : Upwardly projecting
- Type of additional sheath (IW) : None
- Presence of stipules (IW) : None
- Rows number of carcass perforations per intersept (IW) : 1 row per intersept only
- Shape of the interlocking of successive carcass annuli (IW) : Simple
- Rims of carcass external plates (IW) : Smooth
- 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 : Present
- Type of vertical intervallar structures : Septa
- Pores shape of tabulae : Simple pores
- Repartition of vertical intervallar structures pores : Completely porous
- Porosity type of vertical intervallar structures : ?
- Pores shape of vertical intervallar structures : Circular pores
- Repartition of synapticulae : Random
- Building of tabulae : Independent from walls
Others informations
- Number of walls : 2
- Stratigraphical extension : Botoman
- Geographical repartition : Russia
- 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
- Russia : Siberian Platform
- Botoman : 1
- Type of modularity : Branching by longitudinal subdivisions ; Catenulate
- Cup shapes : Cylindrical-conical
- Type of other aquiferous unit : None
Systematic
- Orders : Ajacicyathida
- Superfamillies inside the Erismacoscinina : Porocoscinoidea
- Famillies inside the Erismacoscinina : Tatijanaecyathidae
- Shape of carcass perforations openings (OW/SW) : ?
- Cup shapes : Cylindrical-conical
- Suborders inside the Ajacicyathida : Erismacoscinina
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 longitudinal subdivisions ; Catenulate
- Type of habitus : Solitary ; Modular
- Presence of carcass bumps: outer wall or single wall (OW/SW) : None
- Presence of carcass external plates: outer wall or single wall (OW/SW) : Present
- Shape of carcass external plates (OW/SW) : ?
- Direction of carcass external plates (OW/SW) : Upwardly projecting
- Localization of carcass annuli according tabulae (IW) : Annuli between each tabulae only
- Shape of carcass external plates (IW) : S-shaped only
- Direction of carcass external plates (IW) : Upwardly projecting
- Presence of carcass external plates: inner carcass wall (IW) : Present
- Presence of thorny corolla : None
- Type of carcass external plates (OW/SW) : Bracts
- Type of carcass external plates (IW) : Annuli
- Type of additional sheath (OW/SW) : None
- Type of additional sheath (IW) : None
- Shape of carcass perforations openings (OW/SW) : ?
- Rims of carcass external plates (OW/SW) : Smooth
- Rims of carcass external plates (IW) : Smooth
- Presence of chambers : None
- Type of other aquiferous unit : 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) : Canals
- 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 : Septa
- Presence of vertical intervallar structures : Present
- Presence of thorny corolla : None
- Repartition of synapticulae : Random
- Type of links between intervallar structures : Synapticulae
- Presence of intervallar cells : None
- Pores shape of tabulae : Simple pores
- Presence of tabulae : Present
- Type of other aquiferous unit : None
- Presence of carcass external plates: outer wall or single wall (OW/SW) : Present
- Presence of carcass external plates: inner carcass wall (IW) : Present
- Rows number of carcass perforations per intersept (OW/SW) : More than 2 rows per intersept only
- Rims of carcass external plates (OW/SW) : Smooth
- Rows number of carcass perforations per intersept (IW) : 1 row per intersept only
- Rims of carcass external plates (IW) : Smooth
- 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 longitudinal subdivisions ; Catenulate
- Type of habitus : Solitary ; Modular
- Direction of carcass canals tubes (OW/SW) : Downwardly opening
- Origin of carcass canals (OW/SW) : Limited to the carcass
- Type of carcass perforations: outer wall or single wall (OW/SW) : Canals
- Presence of carcass bumps: outer wall or single wall (OW/SW) : None
- Presence of carcass external plates: outer wall or single wall (OW/SW) : Present
- Direction of carcass external plates (OW/SW) : Upwardly projecting
- Cup shapes : Cylindrical-conical
- Type of carcass perforations: inner wall (IW) : Pores
- Structure of central Cavity (or internal if one wall) : Empty
- Localization of carcass annuli according tabulae (IW) : Annuli between each tabulae only
- Shape of carcass external plates (IW) : S-shaped only
- Direction of carcass external plates (IW) : Upwardly projecting
- Presence of carcass external plates: inner carcass wall (IW) : Present
- Shape of morphological tubes (IW) : None ; S-shaped
- Type of vertical intervallar structures : Septa
- Repartition of vertical intervallar structures pores : Completely porous
- Porosity type of vertical intervallar structures : ?
- Pores shape of vertical intervallar structures : Circular pores
- Presence of vertical intervallar structures : Present
- Presence of thorny corolla : None
- Repartition of synapticulae : Random
- Type of links between intervallar structures : Synapticulae
- Presence of intervallar cells : None
- Building of tabulae : Independent from walls
- Presence of tabulae : Present
- Type of other aquiferous unit : None
- Presence of chambers : None
- Shape of carcass canals tubes (OW/SW) : Straight
- Type of additional sheath (OW/SW) : None
- Type of additional sheath (IW) : None
- Presence of stipules (IW) : None
- Rims of carcass external plates (OW/SW) : Smooth
- Shape of the interlocking of successive carcass annuli (IW) : Simple
- Rims of carcass external plates (IW) : Smooth
- Shape of morphological tubes (OW/SW) : V-shaped
- Rows number of carcass pores per intertabula (IW) : Several rows of pores between two successive tabulae only
- Porosity of vertical intervallar structures : Multiperforate
- Organization of tabulae inside the cup : Regular
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
- Direction of carcass canals tubes (OW/SW) : Downwardly opening
- Origin of carcass canals (OW/SW) : Limited to the carcass
- Type of carcass perforations: outer wall or single wall (OW/SW) : Canals
- Presence of carcass bumps: outer wall or single wall (OW/SW) : None
- Presence of stipules (OW/SW) : Present
- Shape of morphological tubes (OW/SW) : V-shaped
- Rows number of carcass pores per intertabula (IW) : Several rows of pores between two successive tabulae only
- 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 ; S-shaped
- Type of vertical intervallar structures : Septa
- Repartition of vertical intervallar structures pores : Completely porous
- Porosity type of vertical intervallar structures : ?
- Pores shape of vertical intervallar structures : Circular pores
- Presence of vertical intervallar structures : Present
- Presence of thorny corolla : None
- Repartition of synapticulae : Random
- Presence of intervallar cells : None
- Building of tabulae : Independent from walls
- Pores shape of tabulae : Simple pores
- Presence of tabulae : Present
- Presence of chambers : None
- Type of other aquiferous unit : None
- Presence of carcass external plates: outer wall or single wall (OW/SW) : Present
- Presence of carcass external plates: inner carcass wall (IW) : Present
- Shape of carcass canals tubes (OW/SW) : Straight
- 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) : More than 2 rows per intersept only
- Rims of carcass external plates (OW/SW) : Smooth
- Rows number of carcass perforations per intersept (IW) : 1 row per intersept only
- Shape of the interlocking of successive carcass annuli (IW) : Simple
- Rims of carcass external plates (IW) : Smooth
- Type of carcass external plates (OW/SW) : Bracts
- Shape of carcass external plates (OW/SW) : ?
- Direction of carcass external plates (OW/SW) : Upwardly projecting
- Shape of carcass perforations openings (IW) : Simple
- Type of carcass external plates (IW) : Annuli
- Shape of carcass external plates (IW) : S-shaped only
- Direction of carcass external plates (IW) : Upwardly projecting
- Porosity of vertical intervallar structures : Multiperforate
- Type of links between intervallar structures : Synapticulae
- Organization of tabulae inside the cup : Regular
- Shape of carcass perforations openings (OW/SW) : ?
- 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) : ?
- Shape of carcass perforations openings (IW) : Simple
- Presence of thorny corolla : None
- Repartition of vertical intervallar structures pores : Completely porous
- Porosity type of vertical intervallar structures : ?
- Pores shape of vertical intervallar structures : Circular pores
- Pores shape of tabulae : Simple pores
- Subdivision of carcass perforations openings (OW/SW) : Without subdivision
- Subdivision of carcass perforations openings (IW) : Without subdivision