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 voronovae ROZANOV holotype PIN 4597/57 Botoman, Tannu-Ola Range, Tuva, Russia Longitudinal section (outer wall to left) (ROZANOV & MISSARZHEVSKIY, 1966)

Incurvocyathus Incurvocyathus voronovae ROZANOV holotype PIN 4597/57 Botoman, Tannu-Ola Range, Tuva, Russia Detail of longitudinal section (outer wall to left) (ROZANOV & MISSARZHEVSKIY, 1966)

Outer wall

• Structure of outer carcass wall (OW/SW) : Carcass wall well defined
• Carcass perforations: outer wall or single wall (OW/SW) : Pores
• Type of carcass pores (OW/SW) : Simple
• Size of carcass pores (OW/SW) : Uniform size
• Repartition of carcass pores (OW/SW) : Regular repartition
• Repartition types of carcass pores (OW/SW) : Straight rows of pores
• Relationship between rows of carcass pores and intersept (OW/SW) : ?
• Carcass bumps: outer wall or single wall (OW/SW) : None
• Carcass external plates: outer wall or single wall (OW/SW) : None
• Stipules : None
• Type of morphological tubes (OW/SW) : None
• Additional sheath : None

Inner wall

• Structure of inner carcass wall (IW) : Carcass wall well defined
• Stipules : None
• 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) : No tabula
• Building of carcass perforations (IW) : Without participation of vertical structures
• Carcass external plates: inner carcass wall (IW) : Present
• Type of carcass external plates (IW) : Scales
• Shape of carcass external plates (IW) : Arcuate
• Direction of carcass external plates (IW) : Upwardly projecting
  (possibly upwardly projecting)
• Type of morphological tubes (IW) : None
• Additional sheath : None

Intervallum

• Vertical intervallar structures : Present ; None
• Type of vertical intervallar structures : Septa
• Repartition of vertical intervallar structures pores : One row of pores per vertical structure
• Porosity of vertical intervallar structures : Coarsely porous
• Pores of vertical intervallar structures : Circular pores
• Link between vertical intervallar structures : None
• Intervallar cells : None
• Tabulae : none

Others informations

• Cup shapes : Cylindrical-conical
• Shape of cup bulges : Both walls show folds
• Type of folds affecting both walls : Transverse folds
• Shape of folds affecting both walls : Shallow and distant
• 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 : Atdabanian ; Botoman
• Atdabanian : 2 ; 3 ; 4
• Botoman : 1
• Geographical repartition : Russia
• Russia : Altay Sayan ; Tuva

Systematic

• Orders : Ajacicyathida
• Suborders inside the Ajacicyathida : Dokidocyathina
• Superfamillies inside the Dokidocyathina : Dokidocyathoidea
• Famillies inside the Dokidocyathina : Dokidocyathellidae

External view

• Cup shapes : Cylindrical-conical
• Shape of cup bulges : Both walls show folds
• Type of folds affecting both walls : Transverse folds
• Shape of folds affecting both walls : Shallow and distant
• 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
• Size of carcass pores (OW/SW) : Uniform size
• Carcass bumps: outer wall or single wall (OW/SW) : None
• Carcass external plates: outer wall or single wall (OW/SW) : None
• Carcass external plates: inner carcass wall (IW) : Present
• Type of carcass external plates (IW) : Scales
• Shape of carcass external plates (IW) : Arcuate
• Direction of carcass external plates (IW) : Upwardly projecting
  (possibly upwardly projecting)
• Additional sheath : None
• Thorny corolla : None

Transverse section

• Shape of cup bulges : Both walls show folds
• Type of folds affecting both walls : Transverse folds
• Shape of folds affecting both walls : Shallow and distant
• 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) : Pores
• Relationship between rows of carcass pores and intersept (OW/SW) : ?
• Carcass bumps: outer wall or single wall (OW/SW) : None
• Carcass external plates: outer wall or single wall (OW/SW) : None
• Carcass perforations: inner wall (IW) : Pores
• Building of carcass perforations (IW) : Without participation of vertical structures
• Carcass external plates: inner carcass wall (IW) : Present
• Additional sheath : None
• Thorny corolla : None
• Vertical intervallar structures : Present ; None
• Type of vertical intervallar structures : Septa
• Repartition of vertical intervallar structures pores : One row of pores per vertical structure
• Link between vertical intervallar structures : None
• Intervallar cells : None
• Tabulae : none
• Other aquiferous unit : None

Longitudinal section

• Shape of cup bulges : Both walls show folds
• Type of folds affecting both walls : Transverse folds
• Shape of folds affecting both walls : Shallow and distant
• 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) : Pores
• Carcass bumps: outer wall or single wall (OW/SW) : None
• Carcass external plates: outer wall or single wall (OW/SW) : None
• Stipules : None
• Type of morphological tubes (OW/SW) : None
• Carcass perforations: inner wall (IW) : Pores
• Relationship between rows of carcass pores and tabulae (IW) : No tabula
• Carcass external plates: inner carcass wall (IW) : Present
• Type of carcass external plates (IW) : Scales
• Shape of carcass external plates (IW) : Arcuate
• Direction of carcass external plates (IW) : Upwardly projecting
  (possibly upwardly projecting)
• Type of morphological tubes (IW) : None
• Additional sheath : None
• Thorny corolla : None
• Vertical intervallar structures : Present ; None
• Type of vertical intervallar structures : Septa
• Repartition of vertical intervallar structures pores : One row of pores per vertical structure
• Porosity of vertical intervallar structures : Coarsely porous
• Pores of vertical intervallar structures : Circular pores
• Link between vertical intervallar structures : None
• Intervallar cells : None
• Tabulae : none
• Chambers : None
• Other aquiferous unit : None

Oblique section

• Shape of cup bulges : Both walls show folds
• Type of folds affecting both walls : Transverse folds
• Shape of folds affecting both walls : Shallow and distant
• 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) : Pores
• Size of carcass pores (OW/SW) : Uniform size
• Relationship between rows of carcass pores and intersept (OW/SW) : ?
• Carcass bumps: outer wall or single wall (OW/SW) : None
• Carcass external plates: outer wall or single wall (OW/SW) : None
• Stipules : None
• Type of morphological tubes (OW/SW) : None
• 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) : No tabula
• Building of carcass perforations (IW) : Without participation of vertical structures
• Carcass external plates: inner carcass wall (IW) : Present
• Type of morphological tubes (IW) : None
• Additional sheath : None
• Thorny corolla : None
• Vertical intervallar structures : Present ; None
• Type of vertical intervallar structures : Septa
• Repartition of vertical intervallar structures pores : One row of pores per vertical structure
• Porosity of vertical intervallar structures : Coarsely porous
• Pores of vertical intervallar structures : Circular pores
• Link between vertical intervallar structures : None
• Intervallar cells : None
• Tabulae : none
• Chambers : None
• Other aquiferous unit : None

Tangential section

• Type of carcass pores (OW/SW) : Simple
• Size of carcass pores (OW/SW) : Uniform size
• Repartition of carcass pores (OW/SW) : Regular repartition
• Repartition types of carcass pores (OW/SW) : Straight rows of pores
• Type of carcass pores (IW) : Simple
• Thorny corolla : None
• Repartition of vertical intervallar structures pores : One row of pores per vertical structure
• Porosity of vertical intervallar structures : Coarsely porous
• Pores of vertical intervallar structures : Circular pores