Archaeocyathan knowledge base (Cambrian)

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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.

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Outer wall

• Direction of carcass external plates (OW/SW) : Downwardly projecting
• Shape of carcass perforations openings (OW/SW) : ?
• Direction of carcass canals tubes (OW/SW) : Horizontal to upwardly opening
• Presence of carcass external plates: outer wall or single wall (OW/SW) : Present
• Origin of carcass canals (OW/SW) : Limited to the carcass
• Type of carcass perforations: outer wall or single wall (OW/SW) : Canals
• Presence of carcass bumps: outer wall or single wall (OW/SW) : None
• Shape of carcass external plates (OW/SW) : ?
• Presence of stipules (OW/SW) : ?
• Shape of morphological tubes (OW/SW) : Inverted-V shaped
• Structure of outer carcass wall (OW/SW) : Carcass wall well defined
• Type of carcass external plates (OW/SW) : Bracts
• Shape of carcass canals tubes (OW/SW) : Straight
• Type of additional sheath (OW/SW) : None
• Rows number of carcass perforations per intersept (OW/SW) : More than 2 rows per intersept only
• Rims of carcass external plates (OW/SW) : Smooth
• Subdivision of carcass perforations openings (OW/SW) : Without subdivision

Inner wall

• Shape of carcass perforations openings (IW) : ?
• Shape of carcass canals tubes zone A (IW) : Straight ; Straight to waved ; Waved
• Direction of carcass canals tubes zone A (IW) : Horizontal to upwardly opening ; Horizontal to upwardly opening AND lateral opening
• Porosity of carcass canals tubes zone A (IW) : Spongiose
• Type of carcass perforations: inner wall (IW) : Canals
• Building of carcass perforations (IW) : Without participation of vertical structures
• Presence of carcass external plates: inner carcass wall (IW) : None (external plates and/or inner wall)
• Shape of morphological tubes (IW) : V-shaped
• Structure of inner carcass wall (IW) : Carcass wall well defined
• Constitution of carcass canal system (IW) : 1 zone
• Type of additional sheath (IW) : None
• Presence of stipules (IW) : Present
• Rows number of carcass perforations per intersept (IW) : 1 row per intersept only
• Subdivision of carcass perforations openings (IW) : Without subdivision

Intervallum

• Presence of intervallar cells : None
• Type of links between intervallar structures : None
• Presence of vertical intervallar structures : Present
• Presence of tabulae : Present ; none
• Type of vertical intervallar structures : Septa
• Pores shape of tabulae : Pecten
• Repartition of vertical intervallar structures pores : Completely porous
• Porosity type of vertical intervallar structures : ?
• Pores shape of vertical intervallar structures : Circular pores
• Building of tabulae : Independent from walls

Others informations

• Number of walls : 2
• Stratigraphical extension : Toyonian
• Geographical repartition : Europe ; Russia
• Shape of cup bulges : None
• Presence of chambers : None
• Type of habitus : Solitary ; Modular
• Structure of central Cavity (or internal if one wall) : Empty ; Reduce
• Presence of thorny corolla : None
• Europe : Italia: Sardinia
• Russia : Transbaikal
• Toyonian : 1
• Type of modularity : Branching by longitudinal subdivisions ; Catenulate
• Cup shapes : Cylindrical-conical
• Type of other aquiferous unit : None

Systematic

• Orders : Ajacicyathida
• Superfamillies inside the Ajacicyathina : Ethmophylloidea
• Famillies inside the Ajacicyathina : Ethmophyllidae
• Shape of carcass perforations openings (OW/SW) : ?
• Cup shapes : Cylindrical-conical
• Suborders inside the Ajacicyathida : Ajacicyathina

External view

• Cup shapes : Cylindrical-conical
• Shape of cup bulges : None
• Structure of outer carcass wall (OW/SW) : Carcass wall well defined
• Type of modularity : Branching by longitudinal subdivisions ; Catenulate
• Type of habitus : Solitary ; Modular
• Presence of carcass bumps: outer wall or single wall (OW/SW) : None
• Presence of carcass external plates: outer wall or single wall (OW/SW) : Present
• Shape of carcass external plates (OW/SW) : ?
• Direction of carcass external plates (OW/SW) : Downwardly projecting
• Presence of carcass external plates: inner carcass wall (IW) : None (external plates and/or inner wall)
• Presence of thorny corolla : None
• Type of carcass external plates (OW/SW) : Bracts
• Type of additional sheath (OW/SW) : None
• Type of additional sheath (IW) : None
• Shape of carcass perforations openings (OW/SW) : ?
• Rims of carcass external plates (OW/SW) : Smooth
• Presence of chambers : None
• Type of other aquiferous unit : None
• Subdivision of carcass perforations openings (OW/SW) : Without subdivision
• Number of walls : 2

Transverse section

• 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
• Number of walls : 2
• Type of habitus : Solitary ; Modular
• Type of carcass perforations: outer wall or single wall (OW/SW) : Canals
• Presence of carcass bumps: outer wall or single wall (OW/SW) : None
• Building of carcass perforations (IW) : Without participation of vertical structures
• Type of carcass perforations: inner wall (IW) : Canals
• Structure of central Cavity (or internal if one wall) : Empty ; Reduce
• Type of vertical intervallar structures : Septa
• Presence of vertical intervallar structures : Present
• Presence of thorny corolla : None
• Type of links between intervallar structures : None
• Presence of intervallar cells : None
• Pores shape of tabulae : Pecten
• Presence of tabulae : Present ; none
• Type of other aquiferous unit : None
• Presence of carcass external plates: outer wall or single wall (OW/SW) : Present
• Presence of carcass external plates: inner carcass wall (IW) : None (external plates and/or inner wall)
• Rows number of carcass perforations per intersept (OW/SW) : More than 2 rows per intersept only
• Rims of carcass external plates (OW/SW) : Smooth
• Rows number of carcass perforations per intersept (IW) : 1 row per intersept only
• Constitution of carcass canal system (IW) : 1 zone
• Porosity of vertical intervallar structures : Multiperforate

Longitudinal section

• 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
• Number of walls : 2
• Type of modularity : Branching by longitudinal subdivisions ; Catenulate
• Type of habitus : Solitary ; Modular
• Direction of carcass canals tubes (OW/SW) : Horizontal to upwardly opening
• Origin of carcass canals (OW/SW) : Limited to the carcass
• Type of carcass perforations: outer wall or single wall (OW/SW) : Canals
• Presence of carcass bumps: outer wall or single wall (OW/SW) : None
• Presence of carcass external plates: outer wall or single wall (OW/SW) : Present
• Direction of carcass external plates (OW/SW) : Downwardly projecting
• Cup shapes : Cylindrical-conical
• Constitution of carcass canal system (IW) : 1 zone
• Shape of carcass canals tubes zone A (IW) : Straight ; Straight to waved ; Waved
• Porosity of carcass canals tubes zone A (IW) : Spongiose
• Direction of carcass canals tubes zone A (IW) : Horizontal to upwardly opening ; Horizontal to upwardly opening AND lateral opening
• Type of carcass perforations: inner wall (IW) : Canals
• Structure of central Cavity (or internal if one wall) : Empty ; Reduce
• Presence of carcass external plates: inner carcass wall (IW) : None (external plates and/or inner wall)
• Shape of morphological tubes (IW) : V-shaped
• Type of vertical intervallar structures : Septa
• Repartition of vertical intervallar structures pores : Completely porous
• Porosity type of vertical intervallar structures : ?
• Pores shape of vertical intervallar structures : Circular pores
• Presence of vertical intervallar structures : Present
• Presence of thorny corolla : None
• Type of links between intervallar structures : None
• Presence of intervallar cells : None
• Building of tabulae : Independent from walls
• Presence of tabulae : Present ; none
• Type of other aquiferous unit : None
• Presence of chambers : None
• Shape of carcass canals tubes (OW/SW) : Straight
• Type of additional sheath (OW/SW) : None
• Type of additional sheath (IW) : None
• Presence of stipules (IW) : Present
• Rims of carcass external plates (OW/SW) : Smooth
• Shape of morphological tubes (OW/SW) : Inverted-V shaped
• Porosity of vertical intervallar structures : Multiperforate
• Organization of tabulae inside the cup : Random

Oblique section

• 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
• Number of walls : 2
• Type of habitus : Solitary ; Modular
• Direction of carcass canals tubes (OW/SW) : Horizontal to upwardly opening
• Origin of carcass canals (OW/SW) : Limited to the carcass
• Type of carcass perforations: outer wall or single wall (OW/SW) : Canals
• Presence of carcass bumps: outer wall or single wall (OW/SW) : None
• Presence of stipules (OW/SW) : ?
• Shape of morphological tubes (OW/SW) : Inverted-V shaped
• Cup shapes : Cylindrical-conical
• Shape of carcass canals tubes zone A (IW) : Straight ; Straight to waved ; Waved
• Porosity of carcass canals tubes zone A (IW) : Spongiose
• Direction of carcass canals tubes zone A (IW) : Horizontal to upwardly opening ; Horizontal to upwardly opening AND lateral opening
• Building of carcass perforations (IW) : Without participation of vertical structures
• Type of carcass perforations: inner wall (IW) : Canals
• Structure of central Cavity (or internal if one wall) : Empty ; Reduce
• Shape of morphological tubes (IW) : V-shaped
• Type of vertical intervallar structures : Septa
• Repartition of vertical intervallar structures pores : Completely porous
• Porosity type of vertical intervallar structures : ?
• Pores shape of vertical intervallar structures : Circular pores
• Presence of vertical intervallar structures : Present
• Presence of thorny corolla : None
• Presence of intervallar cells : None
• Building of tabulae : Independent from walls
• Pores shape of tabulae : Pecten
• Presence of tabulae : Present ; none
• Presence of chambers : None
• Type of other aquiferous unit : None
• Presence of carcass external plates: outer wall or single wall (OW/SW) : Present
• Presence of carcass external plates: inner carcass wall (IW) : None (external plates and/or inner wall)
• Shape of carcass canals tubes (OW/SW) : Straight
• Type of additional sheath (OW/SW) : None
• Type of additional sheath (IW) : None
• Presence of stipules (IW) : Present
• Rows number of carcass perforations per intersept (OW/SW) : More than 2 rows per intersept only
• Rims of carcass external plates (OW/SW) : Smooth
• Rows number of carcass perforations per intersept (IW) : 1 row per intersept only
• Type of carcass external plates (OW/SW) : Bracts
• Shape of carcass external plates (OW/SW) : ?
• Direction of carcass external plates (OW/SW) : Downwardly projecting
• Shape of carcass perforations openings (IW) : ?
• Porosity of vertical intervallar structures : Multiperforate
• Type of links between intervallar structures : None
• Organization of tabulae inside the cup : Random
• Shape of carcass perforations openings (OW/SW) : ?
• Subdivision of carcass perforations openings (OW/SW) : Without subdivision
• Subdivision of carcass perforations openings (IW) : Without subdivision
• Constitution of carcass canal system (IW) : 1 zone

Tangential section

• Shape of carcass perforations openings (OW/SW) : ?
• Shape of carcass perforations openings (IW) : ?
• Presence of thorny corolla : None
• Repartition of vertical intervallar structures pores : Completely porous
• Porosity type of vertical intervallar structures : ?
• Pores shape of vertical intervallar structures : Circular pores
• Pores shape of tabulae : Pecten
• Subdivision of carcass perforations openings (OW/SW) : Without subdivision
• Subdivision of carcass perforations openings (IW) : Without subdivision
• Porosity of carcass canals tubes zone A (IW) : Spongiose

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Base mise à jour le 11 mars 2014 | Page générée avec Xper2 le 11 mars 2014