Aporosocyathus
Aporosocyathus KRUSE, 1978
Specimen-type: Aporosocyathus mucroporus holotype, KRUSE, 1978, fig. 4A-B
Systematics:
Order: AJACICYATHIDA R. Bedford& J. Bedford, 1939
Suborder: AJACICYATHINA R. Bedford& J. Bedford, 1939
Superfamily: ETHMOPHYLLOIDEA Okulitch, 1937
Family: KIJACYATHIDAE Zhuravleva, 1964
Notes:
Presence in Mongolia and Canada isn't sure.
Aporosocyathus
Aporosocyathus
Outer wall
- Direction of carcass external plates (OW/SW) : Downwardly projecting
- Shape of carcass perforations openings (OW/SW) : ?
- Direction of carcass canals tubes (OW/SW) : Horizontal to upwardly opening
- Presence of carcass external plates: outer wall or single wall (OW/SW) : Present
- Origin of carcass canals (OW/SW) : Limited to the carcass
- Type of carcass perforations: outer wall or single wall (OW/SW) : Canals
- Presence of carcass bumps: outer wall or single wall (OW/SW) : None
- Shape of carcass external plates (OW/SW) : Arcuate
- Presence of stipules (OW/SW) : Present
- Shape of morphological tubes (OW/SW) : Inverted-V shaped ; S-shaped
- Structure of outer carcass wall (OW/SW) : Carcass wall well defined
- Type of carcass external plates (OW/SW) : Bracts
- Shape of carcass canals tubes (OW/SW) : S-shaped
- Type of additional sheath (OW/SW) : None
- Rows number of carcass perforations per intersept (OW/SW) : More than 2 rows per intersept only
- Rims of carcass external plates (OW/SW) : Smooth
- 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) : Several rows of pores between two successive tabulae only ; No tabula
- Type of carcass perforations: inner wall (IW) : Pores
- Building of carcass perforations (IW) : Without participation of vertical structures
- Localization of carcass annuli according tabulae (IW) : Annuli between each tabulae only ; No tabula
- Presence of carcass external plates: inner carcass wall (IW) : Present
- Shape of morphological tubes (IW) : None
- Shape of carcass external plates (IW) : V-shaped
- Structure of inner carcass wall (IW) : Carcass wall well defined
- Type of carcass external plates (IW) : Annuli
- Direction of carcass external plates (IW) : Vertically projecting
- Type of additional sheath (IW) : None
- Presence of stipules (IW) : None
- Rows number of carcass perforations per intersept (IW) : 1 row per intersept only
- Shape of the interlocking of successive carcass annuli (IW) : Simple
- 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
- Presence of vertical intervallar structures : Present
- Presence of tabulae : Present ; none
- Type of vertical intervallar structures : Septa
- Pores shape of tabulae : Pecten
- Repartition of vertical intervallar structures pores : Sparsely porous
- Porosity type of vertical intervallar structures : Finely porous
- Pores shape of vertical intervallar structures : Circular pores
- Building of tabulae : Independent from walls
Others informations
- Number of walls : 2
- Stratigraphical extension : Botoman
- Geographical repartition : Antarctica ; Australia ; Canada ; Mongolia
- Shape of cup bulges : None
- Presence of chambers : None
- Type of habitus : Solitary ; Modular
- Structure of central Cavity (or internal if one wall) : Empty
- Presence of thorny corolla : None
- Botoman : 2 ; 3
- Type of modularity : Branching by longitudinal subdivisions ; Catenulate
- Cup shapes : Cylindrical-conical
- Type of other aquiferous unit : None
Systematic
- Orders : Ajacicyathida
- Superfamillies inside the Ajacicyathina : Ethmophylloidea
- Famillies inside the Ajacicyathina : Kijacyathidae
- Shape of carcass perforations openings (OW/SW) : ?
- Cup shapes : Cylindrical-conical
- Suborders inside the Ajacicyathida : Ajacicyathina
External view
- Cup shapes : Cylindrical-conical
- Shape of cup bulges : None
- Structure of outer carcass wall (OW/SW) : Carcass wall well defined
- Type of modularity : Branching by longitudinal subdivisions ; Catenulate
- Type of habitus : Solitary ; Modular
- Presence of carcass bumps: outer wall or single wall (OW/SW) : None
- Presence of carcass external plates: outer wall or single wall (OW/SW) : Present
- Shape of carcass external plates (OW/SW) : Arcuate
- Direction of carcass external plates (OW/SW) : Downwardly projecting
- Localization of carcass annuli according tabulae (IW) : Annuli between each tabulae only ; No tabula
- Shape of carcass external plates (IW) : V-shaped
- Direction of carcass external plates (IW) : Vertically projecting
- Presence of carcass external plates: inner carcass wall (IW) : Present
- Presence of thorny corolla : None
- Type of carcass external plates (OW/SW) : Bracts
- Type of carcass external plates (IW) : Annuli
- Type of additional sheath (OW/SW) : None
- Type of additional sheath (IW) : None
- Shape of carcass perforations openings (OW/SW) : ?
- Rims of carcass external plates (OW/SW) : Smooth
- 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
- 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
- Number of walls : 2
- Type of habitus : Solitary ; Modular
- Type of carcass perforations: outer wall or single wall (OW/SW) : Canals
- 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
- Presence of thorny corolla : None
- Type of links between intervallar structures : None
- Presence of intervallar cells : None
- Pores shape of tabulae : Pecten
- Presence of tabulae : Present ; none
- Type of other aquiferous unit : None
- Presence of carcass external plates: outer wall or single wall (OW/SW) : Present
- 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
- Rims of carcass external plates (OW/SW) : Smooth
- Rows number of carcass perforations per intersept (IW) : 1 row per intersept only
- Rims of carcass external plates (IW) : Smooth
- Porosity of vertical intervallar structures : Aporous ; Multiperforate
Longitudinal section
- 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
- Number of walls : 2
- Type of modularity : Branching by longitudinal subdivisions ; Catenulate
- Type of habitus : Solitary ; Modular
- Direction of carcass canals tubes (OW/SW) : Horizontal to upwardly opening
- Origin of carcass canals (OW/SW) : Limited to the carcass
- Type of carcass perforations: outer wall or single wall (OW/SW) : Canals
- Presence of carcass bumps: outer wall or single wall (OW/SW) : None
- Presence of carcass external plates: outer wall or single wall (OW/SW) : Present
- Direction of carcass external plates (OW/SW) : Downwardly projecting
- Cup shapes : Cylindrical-conical
- Type of carcass perforations: inner wall (IW) : Pores
- Structure of central Cavity (or internal if one wall) : Empty
- Localization of carcass annuli according tabulae (IW) : Annuli between each tabulae only ; No tabula
- Shape of carcass external plates (IW) : V-shaped
- Direction of carcass external plates (IW) : Vertically projecting
- Presence of carcass external plates: inner carcass wall (IW) : Present
- Shape of morphological tubes (IW) : None
- Type of vertical intervallar structures : Septa
- Repartition of vertical intervallar structures pores : Sparsely porous
- Porosity type of vertical intervallar structures : Finely porous
- Pores shape of vertical intervallar structures : Circular pores
- Presence of vertical intervallar structures : Present
- Presence of thorny corolla : None
- Type of links between intervallar structures : None
- Presence of intervallar cells : None
- Building of tabulae : Independent from walls
- Presence of tabulae : Present ; none
- Type of other aquiferous unit : None
- Presence of chambers : None
- Shape of carcass canals tubes (OW/SW) : S-shaped
- Type of additional sheath (OW/SW) : None
- Type of additional sheath (IW) : None
- Presence of stipules (IW) : None
- Rims of carcass external plates (OW/SW) : Smooth
- Shape of the interlocking of successive carcass annuli (IW) : Simple
- Rims of carcass external plates (IW) : Smooth
- Shape of morphological tubes (OW/SW) : Inverted-V shaped ; S-shaped
- Rows number of carcass pores per intertabula (IW) : Several rows of pores between two successive tabulae only ; No tabula
- Porosity of vertical intervallar structures : Aporous ; Multiperforate
- Organization of tabulae inside the cup : Random
Oblique section
- 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
- Number of walls : 2
- Type of habitus : Solitary ; Modular
- Direction of carcass canals tubes (OW/SW) : Horizontal to upwardly opening
- Origin of carcass canals (OW/SW) : Limited to the carcass
- Type of carcass perforations: outer wall or single wall (OW/SW) : Canals
- Presence of carcass bumps: outer wall or single wall (OW/SW) : None
- Presence of stipules (OW/SW) : Present
- Shape of morphological tubes (OW/SW) : Inverted-V shaped ; S-shaped
- Rows number of carcass pores per intertabula (IW) : Several rows of pores between two successive tabulae only ; 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
- Repartition of vertical intervallar structures pores : Sparsely porous
- Porosity type of vertical intervallar structures : Finely porous
- Pores shape of vertical intervallar structures : Circular pores
- Presence of vertical intervallar structures : Present
- Presence of thorny corolla : None
- Presence of intervallar cells : None
- Building of tabulae : Independent from walls
- Pores shape of tabulae : Pecten
- Presence of tabulae : Present ; none
- Presence of chambers : None
- Type of other aquiferous unit : None
- Presence of carcass external plates: outer wall or single wall (OW/SW) : Present
- Presence of carcass external plates: inner carcass wall (IW) : Present
- Shape of carcass canals tubes (OW/SW) : S-shaped
- 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
- Rims of carcass external plates (OW/SW) : Smooth
- Rows number of carcass perforations per intersept (IW) : 1 row per intersept only
- Shape of the interlocking of successive carcass annuli (IW) : Simple
- Rims of carcass external plates (IW) : Smooth
- Type of carcass external plates (OW/SW) : Bracts
- Shape of carcass external plates (OW/SW) : Arcuate
- Direction of carcass external plates (OW/SW) : Downwardly projecting
- Shape of carcass perforations openings (IW) : Simple
- Type of carcass external plates (IW) : Annuli
- Shape of carcass external plates (IW) : V-shaped
- Direction of carcass external plates (IW) : Vertically projecting
- Porosity of vertical intervallar structures : Aporous ; Multiperforate
- Type of links between intervallar structures : None
- Organization of tabulae inside the cup : Random
- Shape of carcass perforations openings (OW/SW) : ?
- 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) : ?
- Shape of carcass perforations openings (IW) : Simple
- Presence of thorny corolla : None
- Repartition of vertical intervallar structures pores : Sparsely porous
- Porosity type of vertical intervallar structures : Finely porous
- Pores shape of vertical intervallar structures : Circular pores
- Pores shape of tabulae : Pecten
- Subdivision of carcass perforations openings (OW/SW) : Without subdivision
- Subdivision of carcass perforations openings (IW) : Without subdivision