Archaeocyathan knowledge base (Cambrian)

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Coscinocyathella

Coscinocyathella VOLOGDIN, 1959b

Specimen-type: Coscinocyathella nikitini holotype, VOLOGDIN, 1957d, fig. 1(11)

Systematics:
Order: CAPSULOCYATHIDA Zhuravleva, 1964
Suborder: COSCINOCYATHINA Zhuravleva, 1955
Superfamily: CALYPTOCOSCINOIDEA Debrenne, 1964
Family: TOMOCYATHIDAE Debrenne, Rozanov& A. Zhuravlev, 1989

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Outer wall

• Type of microporous sheath (OW/SW) : Independent
• Shape of carcass perforations openings (OW/SW) : Simple only
• Presence of carcass external plates: outer wall or single wall (OW/SW) : None
• Size of carcass pores (OW/SW) : Uniform size
• Repartition of carcass pores (OW/SW) : Homogeneous repartition
• Type of carcass perforations: outer wall or single wall (OW/SW) : Pores
• Presence of carcass bumps: outer wall or single wall (OW/SW) : None
• Repartition of bracts on additional sheath (OW/SW) : No bract on additional sheath
• Presence of stipules (OW/SW) : None
• Shape of morphological tubes (OW/SW) : None
• Structure of outer carcass wall (OW/SW) : Carcass wall well defined
• Repartition types of carcass pores (OW/SW) : Straight rows of pores
• Type of additional sheath (OW/SW) : Microporous sheath
• Rows number of carcass perforations per intersept (OW/SW) : 2 AND more than 2 rows per intersept
• Subdivision of carcass perforations openings (OW/SW) : Without subdivision

Inner wall

• Shape of carcass perforations openings (IW) : Simple
• Rows number of carcass pores per intertabula (IW) : Several rows of pores between two successive tabulae only
• Type of carcass perforations: inner wall (IW) : Pores
• 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) : None
• Structure of inner carcass wall (IW) : Carcass wall well defined
• Type of additional sheath (IW) : None
• Presence of stipules (IW) : None
• Rows number of carcass perforations per intersept (IW) : More than 2 rows 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
• Type of vertical intervallar structures : Septa
• Pores shape of tabulae : Subdivided pores
• 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 : Extensions of both walls

Others informations

• Number of walls : 2
• Stratigraphical extension : Atdabanian
• Geographical repartition : Mongolia ; Russia
• Shape of cup bulges : None
• Presence of chambers : Present
• Type of habitus : Solitary
• Structure of central Cavity (or internal if one wall) : Empty
• Presence of thorny corolla : None
• Russia : Altay Sayan ; Tuva
• Atdabanian : 1 ; 2 ; 3
• Type of chambers stack : Regular stack
• Chambers number : Several
• Cup shapes : Cylindrical-conical
• Type of other aquiferous unit : None
• Shape of initial chamber : Subspherical
• Shape of subsequent chambers : Subspherical

Systematic

• Orders : Capsulocyathida
• Famillies inside the Coscinocyathina : Tomocyathidae
• Suborders inside the Capsulocyathida : Coscinocyathina
• Shape of carcass perforations openings (OW/SW) : Simple only
• Cup shapes : Cylindrical-conical
• Superfamillies inside the Coscinocyathina : Calyptocoscinoidea

External view

• Cup shapes : Cylindrical-conical
• Shape of cup bulges : None
• Structure of outer carcass wall (OW/SW) : Carcass wall well defined
• Type of habitus : Solitary
• Size of carcass pores (OW/SW) : Uniform size
• Presence of carcass bumps: outer wall or single wall (OW/SW) : None
• Presence of carcass external plates: outer wall or single wall (OW/SW) : None
• Presence of carcass external plates: inner carcass wall (IW) : None (external plates and/or inner wall)
• Repartition of bracts on additional sheath (OW/SW) : No bract on additional sheath
• Presence of thorny corolla : None
• Type of additional sheath (OW/SW) : Microporous sheath
• Type of additional sheath (IW) : None
• Shape of subsequent chambers : Subspherical
• Repartition of carcass pores (OW/SW) : Homogeneous repartition
• Repartition types of carcass pores (OW/SW) : Straight rows of pores
• Shape of carcass perforations openings (OW/SW) : Simple only
• Presence of chambers : Present
• Type of other aquiferous unit : None
• Chambers number : Several
• Type of chambers stack : Regular stack
• Shape of initial chamber : Subspherical
• 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
• Type of carcass perforations: outer wall or single wall (OW/SW) : Pores
• 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) : Pores
• Structure of central Cavity (or internal if one wall) : Empty
• 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 : Subdivided pores
• Presence of tabulae : Present
• Type of other aquiferous unit : None
• Presence of carcass external plates: outer wall or single wall (OW/SW) : None
• 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) : 2 AND more than 2 rows per intersept
• Rows number of carcass perforations per intersept (IW) : More than 2 rows per intersept only
• 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 habitus : Solitary
• Type of carcass perforations: outer wall or single wall (OW/SW) : Pores
• Presence of carcass bumps: outer wall or single wall (OW/SW) : None
• Presence of carcass external plates: outer wall or single wall (OW/SW) : None
• Cup shapes : Cylindrical-conical
• Type of carcass perforations: inner wall (IW) : Pores
• Structure of central Cavity (or internal if one wall) : Empty
• Presence of carcass external plates: inner carcass wall (IW) : None (external plates and/or inner wall)
• Shape of morphological tubes (IW) : None
• Repartition of bracts on additional sheath (OW/SW) : No bract on additional sheath
• 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 : Extensions of both walls
• Presence of tabulae : Present
• Type of other aquiferous unit : None
• Chambers number : Several
• Type of chambers stack : Regular stack
• Presence of chambers : Present
• Type of additional sheath (OW/SW) : Microporous sheath
• Type of additional sheath (IW) : None
• Presence of stipules (IW) : None
• Shape of initial chamber : Subspherical
• Shape of subsequent chambers : Subspherical
• Shape of morphological tubes (OW/SW) : None
• Rows number of carcass pores per intertabula (IW) : Several rows of pores between two successive tabulae only
• Porosity of vertical intervallar structures : Multiperforate
• Organization of tabulae inside the cup : Regular
• Type of microporous sheath (OW/SW) : Independent

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
• Size of carcass pores (OW/SW) : Uniform size
• Type of carcass perforations: outer wall or single wall (OW/SW) : Pores
• Presence of carcass bumps: outer wall or single wall (OW/SW) : None
• Presence of stipules (OW/SW) : None
• Shape of morphological tubes (OW/SW) : None
• Rows number of carcass pores per intertabula (IW) : Several rows of pores between two successive tabulae only
• Cup shapes : Cylindrical-conical
• Building of carcass perforations (IW) : Without participation of vertical structures
• Type of carcass perforations: inner wall (IW) : Pores
• Structure of central Cavity (or internal if one wall) : Empty
• Shape of morphological tubes (IW) : None
• Type of microporous sheath (OW/SW) : Independent
• Repartition of bracts on additional sheath (OW/SW) : No bract on additional sheath
• 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 : Extensions of both walls
• Pores shape of tabulae : Subdivided pores
• Presence of tabulae : Present
• Chambers number : Several
• Type of chambers stack : Regular stack
• Presence of chambers : Present
• Type of other aquiferous unit : None
• Presence of carcass external plates: outer wall or single wall (OW/SW) : None
• Presence of carcass external plates: inner carcass wall (IW) : None (external plates and/or inner wall)
• Type of additional sheath (OW/SW) : Microporous sheath
• Type of additional sheath (IW) : None
• Presence of stipules (IW) : None
• Shape of initial chamber : Subspherical
• Rows number of carcass perforations per intersept (OW/SW) : 2 AND more than 2 rows per intersept
• Rows number of carcass perforations per intersept (IW) : More than 2 rows per intersept only
• Shape of carcass perforations openings (IW) : Simple
• Porosity of vertical intervallar structures : Multiperforate
• Type of links between intervallar structures : None
• Organization of tabulae inside the cup : Regular
• Shape of subsequent chambers : Subspherical
• Shape of carcass perforations openings (OW/SW) : Simple only
• Subdivision of carcass perforations openings (OW/SW) : Without subdivision
• Subdivision of carcass perforations openings (IW) : Without subdivision

Tangential section

• Shape of carcass perforations openings (OW/SW) : Simple only
• Size of carcass pores (OW/SW) : Uniform size
• Repartition of carcass pores (OW/SW) : Homogeneous repartition
• Shape of carcass perforations openings (IW) : Simple
• Type of microporous sheath (OW/SW) : Independent
• Repartition of bracts on additional sheath (OW/SW) : No bract on additional sheath
• 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 : Subdivided pores
• Repartition types of carcass pores (OW/SW) : Straight rows of pores
• Subdivision of carcass perforations openings (OW/SW) : Without subdivision
• Subdivision of carcass perforations openings (IW) : Without subdivision

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