Rozanovicyathus
Rozanovicyathus KORSHUNOV, 1969
Specimen-type: Rozanovicyathus
alexi holotype, ZHURAVLEVA, KORSHUNOV& ROZANOV, 1969, pl. 23, fig.
1, 3
Systematics:
Order: AJACICYATHIDA R.
Bedford& J. Bedford, 1939
Suborder: ERISMACOSCININA
Debrenne, Rozanov& A. Zhuravlev, 1989
Superfamily: POROCOSCINOIDEA
Debrenne, 1964
Family: ROZANOVICYATHIDAE Korshunov, 1969
Rozanovicyathus Rozanovicyathus alexi KORSHUNOV holotype TsSGM 323/93 Botoman, Mukhatta Creek, Lena River, Yakutia, Russia Transverse section (ZHURAVLEVA, KORSHUNOV & ROZANOV, 1969). |
Outer wall
- Structure of outer carcass wall (OW/SW) : Carcass wall well defined
- Carcass perforations: outer wall or single wall (OW/SW) : Canals
- Shape of carcass canals (OW/SW) : S-shaped
-
Direction of carcass canals (OW/SW) : Upwardly opening ;
Horizontal opening
(horizontal to upwardly opening) - Origin of carcass canals (OW/SW) : Limited to the carcass
- Relationship between carcass canals and intersept (OW/SW) : Several rows of canals per intersept
- Carcass bumps: outer wall or single wall (OW/SW) : None
- Carcass external plates: outer wall or single wall (OW/SW) : Present
- Type of carcass external plates (OW/SW) : Bracts
- Shape of carcass external plates (OW/SW) : ?
- Direction of carcass external plates (OW/SW) : Downwardly projecting
- Stipules : ?
- Type of morphological tubes (OW/SW) : Inverted-V shaped ; S-shaped
- Additional sheath : None
Inner wall
- Structure of inner carcass wall (IW) : Carcass wall well defined
- Stipules : ?
- Carcass perforations: inner wall (IW) : Pores
- Type of carcass pores (IW) : Simple
- Relationship between rows of carcass pores and intersept (IW) : 1
- Relationship between rows of carcass pores and tabulae (IW) : ?
- Building of carcass perforations (IW) : Without participation of vertical structures
- Carcass external plates: inner carcass wall (IW) : None (external plates and/or inner wall)
- Type of morphological tubes (IW) : None
- Additional sheath : None
Intervallum
- Vertical intervallar structures : Present
- Type of vertical intervallar structures : Septa
- Repartition of vertical intervallar structures pores : Completely porous
- Porosity of vertical intervallar structures : ?
- Pores of vertical intervallar structures : Circular pores
- Link between vertical intervallar structures : None
- Intervallar cells : None
- Tabulae : Present
- Building of tabulae : Independent from walls
- Porosity of tabulae : Slitlike pores
Others informations
- Cup shapes : Cylindrical-conical
- Shape of cup bulges : None
- Number of walls : 2
- Habitus : Solitary ; Modular
- Type of modularity : Branching by longitudinal subdivisions ; Catenulate
- Central Cavity (or internal if one wall) : Empty
- Thorny corolla : None
- Chambers : None
- Other aquiferous unit : None
- Stratigraphical extension : Botoman
- Botoman : 1
- Geographical repartition : Russia
- Russia : Siberian Platform
Systematic
- Orders : Ajacicyathida
- Suborders inside the Ajacicyathida : Erismacoscinina
- Superfamillies inside the Erismacoscinina : Porocoscinoidea
- Famillies inside the Erismacoscinina : Rozanovicyathidae
External view
- Cup shapes : Cylindrical-conical
- 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
- Habitus : Solitary ; Modular
- Type of modularity : Branching by longitudinal subdivisions ; Catenulate
- Carcass bumps: outer wall or single wall (OW/SW) : None
- Carcass external plates: outer wall or single wall (OW/SW) : Present
- Type of carcass external plates (OW/SW) : Bracts
- Shape of carcass external plates (OW/SW) : ?
- Direction of carcass external plates (OW/SW) : Downwardly projecting
- Carcass external plates: inner carcass wall (IW) : None (external plates and/or inner wall)
- Additional sheath : None
- Thorny corolla : None
Transverse section
- Shape of cup bulges : None
- Number of walls : 2
- Structure of outer carcass wall (OW/SW) : Carcass wall well defined
- Structure of inner carcass wall (IW) : Carcass wall well defined
- Habitus : Solitary ; Modular
- Central Cavity (or internal if one wall) : Empty
- Carcass perforations: outer wall or single wall (OW/SW) : Canals
- Relationship between carcass canals and intersept (OW/SW) : Several rows of canals per intersept
- Carcass bumps: outer wall or single wall (OW/SW) : None
- Carcass external plates: outer wall or single wall (OW/SW) : Present
- Carcass perforations: inner wall (IW) : Pores
- Building of carcass perforations (IW) : Without participation of vertical structures
- Carcass external plates: inner carcass wall (IW) : None (external plates and/or inner wall)
- Additional sheath : None
- Thorny corolla : None
- Vertical intervallar structures : Present
- Type of vertical intervallar structures : Septa
- Repartition of vertical intervallar structures pores : Completely porous
- Link between vertical intervallar structures : None
- Intervallar cells : None
- Tabulae : Present
- Porosity of tabulae : Slitlike pores
- Other aquiferous unit : None
Longitudinal section
- Shape of cup bulges : None
- Number of walls : 2
- Structure of outer carcass wall (OW/SW) : Carcass wall well defined
- Structure of inner carcass wall (IW) : Carcass wall well defined
- Habitus : Solitary ; Modular
- Type of modularity : Branching by longitudinal subdivisions ; Catenulate
- Central Cavity (or internal if one wall) : Empty
- Carcass perforations: outer wall or single wall (OW/SW) : Canals
- Shape of carcass canals (OW/SW) : S-shaped
-
Direction of carcass canals (OW/SW) : Upwardly opening ;
Horizontal opening
(horizontal to upwardly opening) - Origin of carcass canals (OW/SW) : Limited to the carcass
- Relationship between carcass canals and intersept (OW/SW) : Several rows of canals per intersept
- Carcass bumps: outer wall or single wall (OW/SW) : None
- Carcass external plates: outer wall or single wall (OW/SW) : Present
- Type of carcass external plates (OW/SW) : Bracts
- Shape of carcass external plates (OW/SW) : ?
- Direction of carcass external plates (OW/SW) : Downwardly projecting
- Stipules : ?
- Type of morphological tubes (OW/SW) : Inverted-V shaped ; S-shaped
- Carcass perforations: inner wall (IW) : Pores
- Relationship between rows of carcass pores and tabulae (IW) : ?
- Carcass external plates: inner carcass wall (IW) : None (external plates and/or inner wall)
- Type of morphological tubes (IW) : None
- Additional sheath : None
- Thorny corolla : None
- Vertical intervallar structures : Present
- Type of vertical intervallar structures : Septa
- Repartition of vertical intervallar structures pores : Completely porous
- Porosity of vertical intervallar structures : ?
- Pores of vertical intervallar structures : Circular pores
- Link between vertical intervallar structures : None
- Intervallar cells : None
- Tabulae : Present
- Building of tabulae : Independent from walls
- Chambers : None
- Other aquiferous unit : None
Oblique section
- Shape of cup bulges : None
- Number of walls : 2
- Structure of outer carcass wall (OW/SW) : Carcass wall well defined
- Structure of inner carcass wall (IW) : Carcass wall well defined
- Habitus : Solitary ; Modular
- Central Cavity (or internal if one wall) : Empty
- Carcass perforations: outer wall or single wall (OW/SW) : Canals
- Shape of carcass canals (OW/SW) : S-shaped
-
Direction of carcass canals (OW/SW) : Upwardly opening ;
Horizontal opening
(horizontal to upwardly opening) - Origin of carcass canals (OW/SW) : Limited to the carcass
- Relationship between carcass canals and intersept (OW/SW) : Several rows of canals per intersept
- Carcass bumps: outer wall or single wall (OW/SW) : None
- Carcass external plates: outer wall or single wall (OW/SW) : Present
- Stipules : ?
- Type of morphological tubes (OW/SW) : Inverted-V shaped ; S-shaped
- Carcass perforations: inner wall (IW) : Pores
- Relationship between rows of carcass pores and intersept (IW) : 1
- Relationship between rows of carcass pores and tabulae (IW) : ?
- Building of carcass perforations (IW) : Without participation of vertical structures
- Carcass external plates: inner carcass wall (IW) : None (external plates and/or inner wall)
- Type of morphological tubes (IW) : None
- Additional sheath : None
- Thorny corolla : None
- Vertical intervallar structures : Present
- Type of vertical intervallar structures : Septa
- Repartition of vertical intervallar structures pores : Completely porous
- Porosity of vertical intervallar structures : ?
- Pores of vertical intervallar structures : Circular pores
- Link between vertical intervallar structures : None
- Intervallar cells : None
- Tabulae : Present
- Building of tabulae : Independent from walls
- Porosity of tabulae : Slitlike pores
- Chambers : None
- Other aquiferous unit : None
Tangential section
- Type of carcass pores (IW) : Simple
- Thorny corolla : None
- Repartition of vertical intervallar structures pores : Completely porous
- Porosity of vertical intervallar structures : ?
- Pores of vertical intervallar structures : Circular pores
- Porosity of tabulae : Slitlike pores