Mawsonicoscinus
Mawsonicoscinus DEBRENNE& KRUSE, 1986
Specimen-type:
Mawsonicoscinus sigmoides holotype, DEBRENNE& KRUSE, 1986, fig.
22
Systematics:
Order: CAPSULOCYATHIDA
Zhuravleva, 1964
Suborder: COSCINOCYATHINA Zhuravleva, 1955
Superfamily:
COSCINOCYATHOIDEA Taylor, 1910
Family: MAWSONICOSCINIDAE
Debrenne& Kruse, 1986
Mawsonicoscinus Mawsonicoscinus sigmoides DEBRENNE & KRUSE holotype IGNS MG513 Shackleton Limestone, Holyoake Range, Nimrod Glacier, Antarctica Transverse section (DEBRENNE, A. ZHURAVLEV & KRUSE, 2002). |
Mawsonicoscinus Mawsonicoscinus sigmoides DEBRENNE & KRUSE holotype IGNS MG513 Shackleton Limestone, Holyoake Range, Nimrod Glacier, Antarctica Longitudinal section (outer wall to right) (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) : 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) : Canals
- Constitution of carcass canal system (IW) : 1 zone
- Shape of carcass canals zone A (IW) : S-shaped
- Porosity of carcass canals zone A (IW) : Non-porous
- Relationship between carcass canals zone A and intersept (IW) : 1 row of canals per intersept
-
Direction of carcass canals zone A (IW) : Upwardly opening ;
Horizontal opening
(horizontal to upwardly opening) - 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) : S-shaped
- 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 : Finely porous
- Pores of vertical intervallar structures : Circular pores
- Link between vertical intervallar structures : None
- Intervallar cells : None
- Tabulae : Present
- Building of tabulae : Extensions of both walls
- Porosity of tabulae : Simple pores
Others informations
- Cup shapes : Cylindrical-conical
- Shape of cup bulges : None
- Number of walls : 2
- Habitus : Solitary
- Central Cavity (or internal if one wall) : Empty
- Thorny corolla : None
- Chambers : Present
- Chambers number : Several
- Chambers stack : Regular stack
- Other aquiferous unit : None
- Stratigraphical extension : Botoman
- Botoman : 3
- Geographical repartition : Antarctica
Systematic
- Orders : Capsulocyathida
- Suborders inside the Capsulocyathida : Coscinocyathina
- Superfamillies inside the Coscinocyathina : Coscinocyathoidea
- Famillies inside the Coscinocyathina : Mawsonicyathidae
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
- 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) : 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
- 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) : Canals
- Relationship between carcass canals zone A and intersept (IW) : 1 row of canals per intersept
- 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 : Simple 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
- 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) : Canals
- Constitution of carcass canal system (IW) : 1 zone
- Shape of carcass canals zone A (IW) : S-shaped
- Porosity of carcass canals zone A (IW) : Non-porous
-
Direction of carcass canals zone A (IW) : Upwardly opening ;
Horizontal opening
(horizontal to upwardly opening) - Carcass external plates: inner carcass wall (IW) : None (external plates and/or inner wall)
- Type of morphological tubes (IW) : S-shaped
- 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 : Finely porous
- Pores of vertical intervallar structures : Circular pores
- Link between vertical intervallar structures : None
- Intervallar cells : None
- Tabulae : Present
- Building of tabulae : Extensions of both walls
- Chambers : Present
- Chambers number : Several
- Chambers stack : Regular stack
- 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
- 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) : Canals
- Constitution of carcass canal system (IW) : 1 zone
- Shape of carcass canals zone A (IW) : S-shaped
- Porosity of carcass canals zone A (IW) : Non-porous
- Relationship between carcass canals zone A and intersept (IW) : 1 row of canals per intersept
-
Direction of carcass canals zone A (IW) : Upwardly opening ;
Horizontal opening
(horizontal to upwardly opening) - 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) : S-shaped
- 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 : Finely porous
- Pores of vertical intervallar structures : Circular pores
- Link between vertical intervallar structures : None
- Intervallar cells : None
- Tabulae : Present
- Building of tabulae : Extensions of both walls
- Porosity of tabulae : Simple pores
- Chambers : Present
- Chambers number : Several
- Chambers stack : Regular stack
- 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
- Thorny corolla : None
- Repartition of vertical intervallar structures pores : Completely porous
- Porosity of vertical intervallar structures : Finely porous
- Pores of vertical intervallar structures : Circular pores
- Porosity of tabulae : Simple pores