Incurvocyathus
Incurvocyathus ROZANOV in ROZANOV & MISSARZHEVSKIY, 1966
Specimen-type: Incurvocyathus voronovae holotype, ROZANOV & MISSARZHEVSKIY, 1966, pl. 1, fig. 4-5
Systematics:
Order: AJACICYATHIDA R. Bedford& J. Bedford, 1939
Suborder: DOKIDOCYATHINA Vologdin, 1957
Superfamily: DOKIDOCYATHOIDEA R. Bedford& W. R. Bedford, 1936
Family: DOKIDOCYATHIDAE R. Bedford& W. R. Bedford, 1936
Incurvocyathus
Incurvocyathus
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) : More than 2 rows per intersept only ; No vertical intervallar element
- 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) : 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) : Present
- Shape of morphological tubes (IW) : None
- Shape of carcass external plates (IW) : Arcuate ; S-shaped only
- Structure of inner carcass wall (IW) : Carcass wall well defined
- Type of carcass external plates (IW) : Scales
- 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) : More than 2 rows per intersept only ; No vertical intervallar element
- 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 : None ; Bars
- Presence of vertical intervallar structures : Present ; None
- Presence of tabulae : none
- Type of vertical intervallar structures : Septa
- Pores shape of vertical intervallar structures : Circular pores
Others informations
- Number of walls : 2
- Stratigraphical extension : Atdabanian ; Botoman
- Geographical repartition : Russia
- Shape of cup bulges : Both walls show folds
- 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 : Altay Sayan ; Tuva
- Botoman : 1
- Atdabanian : 2 ; 3 ; 4
- General shape of folds affecting both walls : Transverse folds
- Type of modularity : Branching by longitudinal subdivisions ; Catenulate
- Shape of folds affecting both walls : Shallow and distant
- Cup shapes : Cylindrical-conical
- Type of other aquiferous unit : None
Systematic
- Orders : Ajacicyathida
- Superfamillies inside the Dokidocyathina : Dokidocyathoidea
- Famillies inside the Dokidocyathina : Dokidocyathellidae
- Shape of carcass perforations openings (OW/SW) : Simple only
- Cup shapes : Cylindrical-conical
- Suborders inside the Ajacicyathida : Dokidocyathina
External view
- Cup shapes : Cylindrical-conical
- General shape of folds affecting both walls : Transverse folds
- Shape of folds affecting both walls : Shallow and distant
- Shape of cup bulges : Both walls show folds
- Structure of outer carcass wall (OW/SW) : Carcass wall well defined
- Type of modularity : Branching by longitudinal subdivisions ; Catenulate
- 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
- Shape of carcass external plates (IW) : Arcuate ; 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 (IW) : Scales
- 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
- 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
- General shape of folds affecting both walls : Transverse folds
- Shape of folds affecting both walls : Shallow and distant
- Shape of cup bulges : Both walls show folds
- 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 : Septa
- Presence of vertical intervallar structures : Present ; None
- Presence of thorny corolla : None
- Type of links between intervallar structures : None ; Bars
- Presence of intervallar cells : None
- Presence of tabulae : none
- Type of other aquiferous unit : None
- Presence of carcass external plates: outer wall or single wall (OW/SW) : None
- 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 ; No vertical intervallar element
- Rows number of carcass perforations per intersept (IW) : More than 2 rows per intersept only ; No vertical intervallar element
- Rims of carcass external plates (IW) : Smooth
- Porosity of vertical intervallar structures : One row of pores per vertical structure
Longitudinal section
- General shape of folds affecting both walls : Transverse folds
- Shape of folds affecting both walls : Shallow and distant
- Shape of cup bulges : Both walls show folds
- 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
- 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
- Shape of carcass external plates (IW) : Arcuate ; 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
- Type of vertical intervallar structures : Septa
- Pores shape of vertical intervallar structures : Circular pores
- Presence of vertical intervallar structures : Present ; None
- Presence of thorny corolla : None
- Type of links between intervallar structures : None ; Bars
- Presence of intervallar cells : None
- Presence of tabulae : none
- Type of other aquiferous unit : None
- Presence of chambers : None
- Type of additional sheath (OW/SW) : None
- Type of additional sheath (IW) : None
- Presence of stipules (IW) : None
- Rims of carcass external plates (IW) : Smooth
- Shape of morphological tubes (OW/SW) : None
- Rows number of carcass pores per intertabula (IW) : No tabula
- Porosity of vertical intervallar structures : One row of pores per vertical structure
Oblique section
- General shape of folds affecting both walls : Transverse folds
- Shape of folds affecting both walls : Shallow and distant
- Shape of cup bulges : Both walls show folds
- 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 : 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
- Type of vertical intervallar structures : Septa
- Pores shape of vertical intervallar structures : Circular pores
- Presence of vertical intervallar structures : Present ; None
- Presence of thorny corolla : None
- Presence of intervallar cells : None
- Presence of tabulae : none
- Presence of chambers : None
- Type of other aquiferous unit : None
- Presence of carcass external plates: outer wall or single wall (OW/SW) : None
- Presence of carcass external plates: inner carcass wall (IW) : Present
- 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 ; No vertical intervallar element
- Rows number of carcass perforations per intersept (IW) : More than 2 rows per intersept only ; No vertical intervallar element
- Rims of carcass external plates (IW) : Smooth
- Shape of carcass perforations openings (IW) : Simple
- Type of carcass external plates (IW) : Scales
- Shape of carcass external plates (IW) : Arcuate ; S-shaped only
- Direction of carcass external plates (IW) : Upwardly projecting
- Porosity of vertical intervallar structures : One row of pores per vertical structure
- Type of links between intervallar structures : None ; Bars
- Shape of carcass perforations openings (OW/SW) : Simple only
- 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) : Simple only
- Size of carcass pores (OW/SW) : Uniform size
- Repartition of carcass pores (OW/SW) : Homogeneous repartition
- Shape of carcass perforations openings (IW) : Simple
- Presence of thorny corolla : None
- Pores shape of vertical intervallar structures : Circular 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