Fragilicyathus
Fragilicyathus BELYAEVA, 1969
Specimen-type: Fragilicyathus
zhuravlevae holotype, BELYAEVA, 1969, pl. 37, fig. 7
Systematics:
Order:
ARCHAEOCYATHIDA Okulitch, 1935
Suborder: SYRINGOCNEMINA
Okulitch, 19>
Superfamily: FRAGILICYATHOIDEA Belyaeva,
1975
Family:FRAGILICYATHIDAE Belyaeva, 1975
Fragilicyathus Fragilicyathus zhuravlevae BELYAEVA holotype DVGU 6M/212/15-3 Botoman, Gerbikan River, Far East, Russia Oblique longitudinal 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) : Present
- Type of carcass external plates (IW) : Poretubes
- Shape of carcass external plates (IW) : S-shaped
- Direction of carcass external plates (IW) : Upwardly projecting
- Type of morphological tubes (IW) : None
- Additional sheath : None
Intervallum
- Vertical intervallar structures : None
- Link between vertical intervallar structures : Synapticulae
- Repartition of synapticulae : ?
- Intervallar cells : Present
- Type of Intervallar cells : Syringe
- Section of intervallar cells : Hexagonal
- Porosity of intervallar cells : Several rows of pores per facet
- Repartition of intervallar cells pores : Same numbers of rows of pores per facet
- 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
- Central Cavity (or internal if one wall) : Empty
- Thorny corolla : None
- Chambers : None
- Other aquiferous unit : None
- Stratigraphical extension : Botoman
- Botoman : 1
- Geographical repartition : Russia
- Russia : Far East
Systematic
- Orders : Archaeocyathida
- Suborders inside the Archaeocyathida : Syringocnemina
- Superfamillies inside the Syringocnemina : Fragilicyathoidea
- Famillies inside the Syringocnemina : Fragilicyathidae
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
- 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) : Poretubes
- Shape of carcass external plates (IW) : S-shaped
- Direction of carcass external plates (IW) : Upwardly projecting
- 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) : Present
- Additional sheath : None
- Thorny corolla : None
- Vertical intervallar structures : None
- Link between vertical intervallar structures : Synapticulae
- Repartition of synapticulae : ?
- Intervallar cells : Present
- Type of Intervallar cells : Syringe
- 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
- 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) : Present
- Type of carcass external plates (IW) : Poretubes
- Shape of carcass external plates (IW) : S-shaped
- Direction of carcass external plates (IW) : Upwardly projecting
- Type of morphological tubes (IW) : None
- Additional sheath : None
- Thorny corolla : None
- Vertical intervallar structures : None
- Link between vertical intervallar structures : Synapticulae
- Repartition of synapticulae : ?
- Intervallar cells : Present
- Type of Intervallar cells : Syringe
- 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) : Present
- Type of morphological tubes (IW) : None
- Additional sheath : None
- Thorny corolla : None
- Vertical intervallar structures : None
- Link between vertical intervallar structures : Synapticulae
- Repartition of synapticulae : ?
- Intervallar cells : Present
- Type of Intervallar cells : Syringe
- Tabulae : none
- Chambers : None
- Other aquiferous unit : None
Tangential section
- Type of carcass pores (IW) : Simple
- Thorny corolla : None
- Section of intervallar cells : Hexagonal
- Porosity of intervallar cells : Several rows of pores per facet
- Repartition of intervallar cells pores : Same numbers of rows of pores per facet