Dentatocoscinus
Dentatocoscinus A. ZHURAVLEV 1988
Specimen-type: Asterotumulus
sektensis holotype, KORSHUNOV& ZHURAVLEVA, 1967, pl. 2, fig. 5
Systematics:
Order:
AJACICYATHIDA R. Bedford& J. Bedford, 1939
Suborder: ERISMACOSCININA
Debrenne, Rozanov& A. Zhuravlev, 1989
Superfamily: SALAIROCYATHOIDEA
Zhuravleva, 1956
Family: CRASSICOSCINIDAE Debrenne, Rozanov&
A. Zhuravlev, 1988
Dentatocoscinus Dentatocoscinus sektensis (KORSHUNOV & ZHURAVLEVA) holotype TsSGM 247/11 Botoman, Tuora-Sis Range, Lena River, Yakutia, Russia Oblique transverse section (KORSHUNOV & ZHURAVLEVA, 1967) |
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 : ?
- Type of morphological tubes (OW/SW) : None
- Additional sheath : None
Inner wall
- Structure of inner carcass wall (IW) : Carcass wall well defined
- Stipules : ?
- Carcass perforations: inner wall (IW) : Canals
- Constitution of carcass canal system (IW) : 1 zone
- Shape of carcass canals zone A (IW) : Straight
- Porosity of carcass canals zone A (IW) : Non-porous
- Relationship between carcass canals zone A and intersept (IW) : Several rows 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) : Present
- Type of carcass external plates (IW) : Bracts
- Localisation of carcass bracts (IW) : ?
- Shape of carcass external plates (IW) : ?
- Direction of carcass external plates (IW) : ?
- Type of morphological tubes (IW) : ?
- 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 : ?
- Pores of vertical intervallar structures : Circular pores
- Link between vertical intervallar structures : None
- Intervallar cells : None
- Tabulae : Present
- Building of tabulae : Independent from walls
- Porosity of tabulae : Simple pores
Others informations
- Cup shapes : Cylindrical-conical
- Shape of cup bulges : Longitudinally plicate (outer wall)
- 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 : Botoman
- Botoman : 1
- Geographical repartition : Russia
- Russia : Siberian Platform
Systematic
- Orders : Ajacicyathida
- Suborders inside the Ajacicyathida : Erismacoscinina
- Superfamillies inside the Erismacoscinina : Salairocyathoidea
- Famillies inside the Erismacoscinina : Crassicoscinidae
External view
- Cup shapes : Cylindrical-conical
- Shape of cup bulges : Longitudinally plicate (outer wall)
- 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) : Bracts
- Localisation of carcass bracts (IW) : ?
- Shape of carcass external plates (IW) : ?
- Direction of carcass external plates (IW) : ?
- Additional sheath : None
- Thorny corolla : None
Transverse section
- Shape of cup bulges : Longitudinally plicate (outer wall)
- 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) : Canals
- Relationship between carcass canals zone A and intersept (IW) : Several rows of canals per intersept
- 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
- 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 : Longitudinally plicate (outer wall)
- 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 : ?
- 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) : Straight
- 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) : Present
- Type of carcass external plates (IW) : Bracts
- Localisation of carcass bracts (IW) : ?
- Shape of carcass external plates (IW) : ?
- Direction of carcass external plates (IW) : ?
- Type of morphological tubes (IW) : ?
- 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 : ?
- Pores of vertical intervallar structures : Circular pores
- Link between vertical intervallar structures : None
- Intervallar cells : None
- Tabulae : Present
- Building of tabulae : Independent from walls
- Chambers : None
- Other aquiferous unit : None
Oblique section
- Shape of cup bulges : Longitudinally plicate (outer wall)
- 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 : ?
- 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) : Straight
- Porosity of carcass canals zone A (IW) : Non-porous
- Relationship between carcass canals zone A and intersept (IW) : Several rows 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) : Present
- Type of morphological tubes (IW) : ?
- 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 : ?
- Pores of vertical intervallar structures : Circular pores
- Link between vertical intervallar structures : None
- Intervallar cells : None
- Tabulae : Present
- Building of tabulae : Independent from walls
- Porosity of tabulae : Simple pores
- 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
- Thorny corolla : None
- Repartition of vertical intervallar structures pores : Completely porous
- Porosity of vertical intervallar structures : ?
- Pores of vertical intervallar structures : Circular pores
- Porosity of tabulae : Simple pores