Kymbecyathus
Kymbecyathus DEBRENNE& KRUSE, 1986
Specimen-type:
Kymbecyathus avius holotype, DEBRENNE& KRUSE, 1986, p. 241 fig.
6A-B
Systematics:
Order: AJACICYATHIDA R.
Bedford& J. Bedford, 1939
Suborder: DOKIDOCYATHINA
Vologdin, 1957
Superfamily: KYMBECYATHOIDEA Debrenne,
Rozanov& A. Zhuravlev, 1989
Family: KYMBECYATHIDAE
Debrenne, Rozanov& A. Zhuravlev, 1989
Kymbecyathus Kymbecyathus avius DEBRENNE & KRUSE holotype VU VC9 Botoman, Crackling Cwm, Antarctica Oblique longitudinal section (DEBRENNE, A. ZHURAVLEV & KRUSE, 2002) |
Kymbecyathus Kymbecyathus avius DEBRENNE & KRUSE holotype VU VC9 Botoman, Crackling Cwm, Antarctica Transverse section (DEBRENNE, A. ZHURAVLEV & KRUSE, 2002) |
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) : Straight
-
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) : 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) : None (external plates and/or inner wall)
- 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 : 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 : Atdabanian ; Botoman
- Atdabanian : 4
- Botoman : 1 ; 2 ; 3
- Geographical repartition : Antarctica ; Australia
Systematic
- Orders : Ajacicyathida
- Suborders inside the Ajacicyathida : Dokidocyathina
- Superfamillies inside the Dokidocyathina : Kymbecyathoidea
- Famillies inside the Dokidocyathina : Kymbecyathidae
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) : None
- 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) : None
- 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 ; 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 : 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) : Straight
-
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) : 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) : None (external plates and/or inner wall)
- 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 : 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) : Straight
-
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) : 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) : None (external plates and/or inner wall)
- 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 (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