Compositocyathus

Compositocyathus ZHURAVLEVA, 1960b

Specimen-type: Thalamocyathus muchattensis ZHURAVLEVA& ZELENOV, 1955, pl. 2, fig. 1-2

Systematics:
Order: AJACICYATHIDA R. Bedford& J. Bedford, 1939
Suborder: AJACICYATHINA R. Bedford& J. Bedford, 1939
Superfamily: BRONCHOCYATHOIDEA R. Bedford& J. Bedford, 1936
Family: BRONCHOCYATHIDAE R. Bedford& J. Bedford, 1936

Compositocyathus Compositocyathus muchattensis (ZHURAVLEVA) specimen TsSGM 323 Atdabanian, Mukhatta Creek, Lena River, Yakutia, Russia Oblique transverse section (DEBRENNE, A. ZHURAVLEV & KRUSE, 2002).

Compositocyathus Compositocyathus muchattensis (ZHURAVLEVA) holotype TsSGM 205/47b Atdabanian, Mukhatta Creek, Lena River, Yakutia, Russia Longitudinal section (outer wall to left) (ZHURAVLEVA & ZELENOV, 1955)

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 : Present on inner wall

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) : ?
• Building of carcass perforations (IW) : Without participation of vertical structures
• Carcass external plates: inner carcass wall (IW) : Present ; None (external plates and/or inner wall)
• Type of carcass external plates (IW) : Annuli
• Relationship between carcass annuli and tabulae (IW) : Annuli between each tabulae
• Shape of carcass external plates (IW) : Planar
• Direction of carcass external plates (IW) : Horizontally projecting
  (possibly horizontally projecting)
• Type of morphological tubes (IW) : None
• Additional sheath : Present on inner wall
• Type of additional sheath (IW) : Microporous sheath
• Type of microporous sheath (IW) : Independent
• Repartition of bracts on secondary sheath (IW) : No bract on additional sheath
• Repartition of micropores (IW) : Regular

Intervallum

• Vertical intervallar structures : Present
• Type of vertical intervallar structures : Septa
• Repartition of vertical intervallar structures pores : Aporous ; Sparsely porous
• Porosity of vertical intervallar structures : Aporous ; Finely porous
• Pores of vertical intervallar structures : Aporous ; Circular pores
• Link between vertical intervallar structures : None
• Intervallar cells : None
• Tabulae : Present ; none
  (pectinate tabulae may be present)
• Building of tabulae : Independent from walls
• Porosity of tabulae : Pecten
  (pectinate tabulae may be present)

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 : 1 ; 2 ; 3 ; 4
• Botoman : 1
• Geographical repartition : Russia
• Russia : Altay Sayan ; Siberian Platform ; Transbaikal ; Tuva

Systematic

• Orders : Ajacicyathida
• Suborders inside the Ajacicyathida : Ajacicyathina
• Superfamillies inside the Ajacicyathina : Bronchocyathoidea
• Famillies inside the Ajacicyathina : Bronchocyathidae

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
• 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 ; None (external plates and/or inner wall)
• Type of carcass external plates (IW) : Annuli
• Relationship between carcass annuli and tabulae (IW) : Annuli between each tabulae
• Shape of carcass external plates (IW) : Planar
• Direction of carcass external plates (IW) : Horizontally projecting
  (possibly horizontally projecting)
• Additional sheath : Present on inner wall
• Type of additional sheath (IW) : Microporous sheath
• Repartition of bracts on secondary sheath (IW) : No bract on additional sheath
• Repartition of micropores (IW) : Regular
• 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) : 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) : Pores
• Building of carcass perforations (IW) : Without participation of vertical structures
• Carcass external plates: inner carcass wall (IW) : Present ; None (external plates and/or inner wall)
• Additional sheath : Present on inner wall
• Type of additional sheath (IW) : Microporous sheath
• Thorny corolla : None
• Vertical intervallar structures : Present
• Type of vertical intervallar structures : Septa
• Repartition of vertical intervallar structures pores : Aporous ; Sparsely porous
• Link between vertical intervallar structures : None
• Intervallar cells : None
• Tabulae : Present ; none
  (pectinate tabulae may be present)
• Porosity of tabulae : Pecten
  (pectinate tabulae may be present)
• 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) : 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) : Pores
• Relationship between rows of carcass pores and tabulae (IW) : ?
• Carcass external plates: inner carcass wall (IW) : Present ; None (external plates and/or inner wall)
• Type of carcass external plates (IW) : Annuli
• Relationship between carcass annuli and tabulae (IW) : Annuli between each tabulae
• Shape of carcass external plates (IW) : Planar
• Direction of carcass external plates (IW) : Horizontally projecting
  (possibly horizontally projecting)
• Type of morphological tubes (IW) : None
• Additional sheath : Present on inner wall
• Type of additional sheath (IW) : Microporous sheath
• Repartition of bracts on secondary sheath (IW) : No bract on additional sheath
• Thorny corolla : None
• Vertical intervallar structures : Present
• Type of vertical intervallar structures : Septa
• Repartition of vertical intervallar structures pores : Aporous ; Sparsely porous
• Porosity of vertical intervallar structures : Aporous ; Finely porous
• Pores of vertical intervallar structures : Aporous ; Circular pores
• Link between vertical intervallar structures : None
• Intervallar cells : None
• Tabulae : Present ; none
  (pectinate tabulae may be present)
• Building of tabulae : Independent from walls
• 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) : 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) : Pores
• Relationship between rows of carcass pores and intersept (IW) : 1
• Relationship between rows of carcass pores and tabulae (IW) : ?
• Building of carcass perforations (IW) : Without participation of vertical structures
• Carcass external plates: inner carcass wall (IW) : Present ; None (external plates and/or inner wall)
• Type of morphological tubes (IW) : None
• Additional sheath : Present on inner wall
• Type of additional sheath (IW) : Microporous sheath
• Type of microporous sheath (IW) : Independent
• Repartition of bracts on secondary sheath (IW) : No bract on additional sheath
• Thorny corolla : None
• Vertical intervallar structures : Present
• Type of vertical intervallar structures : Septa
• Repartition of vertical intervallar structures pores : Aporous ; Sparsely porous
• Porosity of vertical intervallar structures : Aporous ; Finely porous
• Pores of vertical intervallar structures : Aporous ; Circular pores
• Link between vertical intervallar structures : None
• Intervallar cells : None
• Tabulae : Present ; none
  (pectinate tabulae may be present)
• Building of tabulae : Independent from walls
• Porosity of tabulae : Pecten
  (pectinate tabulae may be present)
• 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
• Type of carcass pores (IW) : Simple
• Type of microporous sheath (IW) : Independent
• Repartition of bracts on secondary sheath (IW) : No bract on additional sheath
• Repartition of micropores (IW) : Regular
• Thorny corolla : None
• Repartition of vertical intervallar structures pores : Aporous ; Sparsely porous
• Porosity of vertical intervallar structures : Aporous ; Finely porous
• Pores of vertical intervallar structures : Aporous ; Circular pores
• Porosity of tabulae : Pecten
  (pectinate tabulae may be present)