Angaricyathus

Angaricyathus ZHURAVLEVA, 1965

Specimen-type: Angaricyathus cyrenovi holotype, ZHURAVLEVA, 1965, pl. 1, fig.6, pl. 2, fig. 1

Systematics:
Order: AJACICYATHIDA R. Bedford& J. Bedford, 1939
Suborder: AJACICYATHINA R. Bedford& J. Bedford, 1939
Superfamily: ETHMOPHYLLOIDEA Okulitch, 1937
Family: ETHMOPHYLLIDAE Okulitch, 1937

Note:
Presence in Europe (Sardinia) isn't sure.

Angaricyathus Angaricyathus cyrenovi ZHURAVLEVA holotype TsSGM 215, specimen 2 Toyonian, Kookta River, Transbaikalia, Russia Oblique longitudinal section (ZHURAVLEVA, 1965).

Angaricyathus Angaricyathus cyrenovi ZHURAVLEVA paratype TsSGM 215, specimen 4 Toyonian, Kookta River, Transbaikalia, Russia Transverse section (ZHURAVLEVA, 1965).

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) : Present
• Type of carcass external plates (OW/SW) : Bracts
• Shape of carcass external plates (OW/SW) : ?
• Direction of carcass external plates (OW/SW) : Downwardly projecting
• Stipules : ?
• Type of morphological tubes (OW/SW) : Inverted-V shaped
• 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) : ?
• Building of carcass canals (IW) : Non-branching
• Shape of carcass canals zone A (IW) : Straight ; Waved
  (straight to waved canals)
• Porosity of carcass canals zone A (IW) : Spongiose
• Relationship between carcass canals zone A and intersept (IW) : 1 row of canals per intersept
• Direction of carcass canals zone A (IW) : Upwardly opening ; Lateral opening ; Horizontal opening
  (horizontal to upwardly and laterally opening)
• Shape of carcass canals zone B (IW) : Straight ; Waved
  (straight to waved canals)
• Direction of carcass canals zone B (IW) : Upwardly opening ; Lateral opening ; Horizontal opening
  (horizontal to upwardly and laterally opening)
• Porosity of carcass canals zone B (IW) : Spongiose
• 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) : V-shaped
• 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 ; 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 ; Reduce
• Thorny corolla : None
• Chambers : None
• Other aquiferous unit : None
• Stratigraphical extension : Toyonian
• Toyonian : 1
• Geographical repartition : Europe ; Russia
  (Presence in Europe (Sardinia) isn't sure.)
• Europe : Italia: Sardinia
  (Presence in Europe (Sardinia) isn't sure.)
• Russia : Transbaikal

Systematic

• Orders : Ajacicyathida
• Suborders inside the Ajacicyathida : Ajacicyathina
• Superfamillies inside the Ajacicyathina : Ethmophylloidea
• Famillies inside the Ajacicyathina : Ethmophyllidae

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
• Carcass bumps: outer wall or single wall (OW/SW) : None
• Carcass external plates: outer wall or single wall (OW/SW) : Present
• Type of carcass external plates (OW/SW) : Bracts
• Shape of carcass external plates (OW/SW) : ?
• Direction of carcass external plates (OW/SW) : Downwardly projecting
• Carcass external plates: inner carcass wall (IW) : None (external plates and/or inner wall)
• 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 ; Reduce
• 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) : Present
• Carcass perforations: inner wall (IW) : Canals
• Building of carcass canals (IW) : Non-branching
• Relationship between carcass canals zone A and intersept (IW) : 1 row of canals per intersept
• Porosity of carcass canals zone B (IW) : Spongiose
• 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 : 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 ; 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 ; Reduce
• 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) : Present
• Type of carcass external plates (OW/SW) : Bracts
• Shape of carcass external plates (OW/SW) : ?
• Direction of carcass external plates (OW/SW) : Downwardly projecting
• Stipules : ?
• Type of morphological tubes (OW/SW) : Inverted-V shaped
• Carcass perforations: inner wall (IW) : Canals
• Constitution of carcass canal system (IW) : ?
• Building of carcass canals (IW) : Non-branching
• Shape of carcass canals zone A (IW) : Straight ; Waved
  (straight to waved canals)
• Porosity of carcass canals zone A (IW) : Spongiose
• Direction of carcass canals zone A (IW) : Upwardly opening ; Lateral opening ; Horizontal opening
  (horizontal to upwardly and laterally opening)
• Shape of carcass canals zone B (IW) : Straight ; Waved
  (straight to waved canals)
• Direction of carcass canals zone B (IW) : Upwardly opening ; Lateral opening ; Horizontal opening
  (horizontal to upwardly and laterally opening)
• Porosity of carcass canals zone B (IW) : Spongiose
• Carcass external plates: inner carcass wall (IW) : None (external plates and/or inner wall)
• Type of morphological tubes (IW) : V-shaped
• 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 ; 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 ; Reduce
• 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) : Present
• Stipules : ?
• Type of morphological tubes (OW/SW) : Inverted-V shaped
• Carcass perforations: inner wall (IW) : Canals
• Constitution of carcass canal system (IW) : ?
• Building of carcass canals (IW) : Non-branching
• Shape of carcass canals zone A (IW) : Straight ; Waved
  (straight to waved canals)
• Porosity of carcass canals zone A (IW) : Spongiose
• Relationship between carcass canals zone A and intersept (IW) : 1 row of canals per intersept
• Direction of carcass canals zone A (IW) : Upwardly opening ; Lateral opening ; Horizontal opening
  (horizontal to upwardly and laterally opening)
• Shape of carcass canals zone B (IW) : Straight ; Waved
  (straight to waved canals)
• Direction of carcass canals zone B (IW) : Upwardly opening ; Lateral opening ; Horizontal opening
  (horizontal to upwardly and laterally opening)
• Porosity of carcass canals zone B (IW) : Spongiose
• 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) : V-shaped
• 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 ; 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

• 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 : Pecten
  (pectinate tabulae may be present)