Pluralicyathus

Pluralicyathus Okulitch, 1950c

Specimen-type: Polycyathus heterovallum VOLOGDIN, 1928,p36 text-fig. 10; pl.2 fig. 1,2,4,5

Systematics:
Order: AJACICYATHIDA R. Bedford& J. Bedford, 1939
Suborder: AJACICYATHINA R. Bedford& J. Bedford, 1939
Superfamily: ERBOCYATHOIDEA Vologdin& Zhuravleva, 1956
Family: ERBOCYATHIDAE Vologdin& Zhuravleva, 1956

Pluralicyathus Pluralicyathus heterovallum (VOLOGDIN) unlocated specimen Toyonian, Uyar River, Altay Sayan, Russia Transverse section (DEBRENNE, A. ZHURAVLEV & KRUSE, 2002)

Pluralicyathus Pluralicyathus heterovallum (VOLOGDIN) specimen TsSGM 205/71 Toyonian, Amga River, Yakutia, Russia Composite section (ZHURAVLEVA, 1960b)

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) : 2
• 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 outer wall (or single wall)
• Type of additional sheath (OW/SW) : Microporous sheath
• Type of microporous sheath (OW/SW) : Attached
• Repartition of bracts on additional sheath (OW/SW) : No bract on additional sheath
• Repartition of micropores (OW/SW) : Regular

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) : More than 2
• 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) : None (external plates and/or inner wall)
• Type of morphological tubes (IW) : None
• Additional sheath : Present on outer wall (or single wall)

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 : 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 ; Catenulate
• Central Cavity (or internal if one wall) : Empty
• Thorny corolla : None
• Chambers : None
• Other aquiferous unit : None
• Stratigraphical extension : Botoman ; Toyonian
• Botoman : 1 ; 2 ; 3
• Toyonian : 1 ; 2 ; 3
• Geographical repartition : Mongolia ; Uzbekistan ; Russia
• Russia : Altay Sayan ; Far East ; Siberian Platform ; Tuva

Systematic

• Orders : Ajacicyathida
• Suborders inside the Ajacicyathida : Ajacicyathina
• Superfamillies inside the Ajacicyathina : Erbocyathoidea
• Famillies inside the Ajacicyathina : Erbocyathidae

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) : None (external plates and/or inner wall)
• Additional sheath : Present on outer wall (or single wall)
• Type of additional sheath (OW/SW) : Microporous sheath
• Repartition of bracts on additional sheath (OW/SW) : No bract on additional sheath
• Repartition of micropores (OW/SW) : 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) : 2
• 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) : None (external plates and/or inner wall)
• Additional sheath : Present on outer wall (or single wall)
• 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 : 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 ; 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) : No tabula
• Carcass external plates: inner carcass wall (IW) : None (external plates and/or inner wall)
• Type of morphological tubes (IW) : None
• Additional sheath : Present on outer wall (or single wall)
• Type of additional sheath (OW/SW) : Microporous sheath
• Repartition of bracts on additional sheath (OW/SW) : 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 : 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) : Pores
• Size of carcass pores (OW/SW) : Uniform size
• Relationship between rows of carcass pores and intersept (OW/SW) : 2
• 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) : More than 2
• 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) : None (external plates and/or inner wall)
• Type of morphological tubes (IW) : None
• Additional sheath : Present on outer wall (or single wall)
• Type of additional sheath (OW/SW) : Microporous sheath
• Type of microporous sheath (OW/SW) : Attached
• Repartition of bracts on additional sheath (OW/SW) : 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 : none
• 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 (OW/SW) : Attached
• Repartition of bracts on additional sheath (OW/SW) : No bract on additional sheath
• Repartition of micropores (OW/SW) : 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