Metaldetes

Metaldetes TAYLOR, 1910

Specimen-type: Metaldetes cylindricus holotype, TAYLOR, 1910, pl. 15, photo 86-88, text-fig. 11, 37, 38

Systematics:
Order: ARCHAEOCYATHIDA Okulitch, 1935
Suborder: ARCHAEOCYATHINA Okulitch, 1935
Superfamily: METACYATHOIDEA R. Bedford& W. R. Bedford, 1934
Family: METACYATHIDAE R. Bedford& W. R. Bedford, 1934

Note:
Taeniae are linked by synapticulae in early ontogenetic stages but rarely so in mature cups.

Metaldetes Metaldetes cylindricus TAYLOR holotype SAM T1592A Botoman, Wilson, Australia Transverse section (DEBRENNE, A. ZHURAVLEV & KRUSE, 2002)

Metaldetes Metaldetes cylindricus TAYLOR holotype SAM T1592A Botoman, Wilson, Australia Detail of inner wall in transverse section (DEBRENNE, A. ZHURAVLEV & KRUSE, 2002)

Metaldetes Metaldetes cylindricus TAYLOR holotype SAM T1592A Botoman, Wilson, Australia Detail of outer wall in transverse section (DEBRENNE, A. ZHURAVLEV & KRUSE, 2002)

Metaldetes Metaldetes cylindricus TAYLOR holotype SAM T1592A Botoman, Wilson, Australia Longitudinal section (DEBRENNE, A. ZHURAVLEV & KRUSE, 2002)

Metaldetes Metaldetes cylindricus TAYLOR holotype SAM T1592A Botoman, Wilson, Australia Detail of taenia in longitudinal section (DEBRENNE, A. ZHURAVLEV & KRUSE, 2002)

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) : Subdivided
• 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 ; Present on outer wall (or single wall)
• Type of additional sheath (OW/SW) : Sieve formed by protrusions
• Repartition of bracts on additional sheath (OW/SW) : No bract on additional sheath
• Type of shieve (OW/SW) : Protrusions are completely connected
• Repartition of micropores (OW/SW) : Irregular

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 ; Subdivided
• Relationship between rows of carcass pores and intersept (IW) : More than 2
• 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) : None (external plates and/or inner wall)
• Type of morphological tubes (IW) : None
• Additional sheath : Present on inner wall ; Present on outer wall (or single wall)
• Type of additional sheath (IW) : Sieve formed by protrusions
• Repartition of bracts on secondary sheath (IW) : No bract on additional sheath
• Type of sieve (IW) : Protrusions are completely connected
• Repartition of micropores (IW) : Irregular

Intervallum

• Vertical intervallar structures : Present
• Type of vertical intervallar structures : Taeniae
• Repartition of vertical intervallar structures pores : ?
• Porosity of vertical intervallar structures : Coarsely porous
• Pores of vertical intervallar structures : Circular pores
• Link between vertical intervallar structures : None ; Synapticulae
  (Taeniae are linked by synapticulae in early ontogenetic stages but rarely so in mature cups.)
• Repartition of synapticulae : Random
  (Taeniae are linked by synapticulae in early ontogenetic stages but rarely so in mature cups.)
• Intervallar cells : None
• Tabulae : Present
• Building of tabulae : Extensions of both walls
• Porosity of tabulae : Subdivided pores

Others informations

• Cup shapes : Cylindrical-conical
• Shape of cup bulges : None
• Number of walls : 2
• Habitus : Solitary ; Modular
• Type of modularity : Branching by external budding ; Branching by longitudinal subdivisions
• Central Cavity (or internal if one wall) : Empty
• Thorny corolla : None
• Chambers : None
• Other aquiferous unit : None
• Stratigraphical extension : Atdabanian ; Botoman
• Atdabanian : 4
• Botoman : 1 ; 2 ; 3
• Geographical repartition : Antarctica ; Australia ; Canada ; Mexico ; Russia ; USA
• Russia : Far East

Systematic

• Orders : Archaeocyathida
• Suborders inside the Archaeocyathida : Archaeocyathina
• Superfamillies inside the Archaeocyathina : Metacyathoidea
• Famillies inside the Archaeocyathina : Metacyathidae

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 external budding ; Branching by longitudinal subdivisions
• 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 inner wall ; Present on outer wall (or single wall)
• Type of additional sheath (IW) : Sieve formed by protrusions
• Repartition of bracts on secondary sheath (IW) : No bract on additional sheath
• Type of sieve (IW) : Protrusions are completely connected
• Repartition of micropores (IW) : Irregular
• Type of additional sheath (OW/SW) : Sieve formed by protrusions
• Repartition of bracts on additional sheath (OW/SW) : No bract on additional sheath
• Type of shieve (OW/SW) : Protrusions are completely connected
• Repartition of micropores (OW/SW) : Irregular
• 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) : None (external plates and/or inner wall)
• Additional sheath : Present on inner wall ; Present on outer wall (or single wall)
• Type of additional sheath (IW) : Sieve formed by protrusions
• Thorny corolla : None
• Vertical intervallar structures : Present
• Type of vertical intervallar structures : Taeniae
• Repartition of vertical intervallar structures pores : ?
• Link between vertical intervallar structures : None ; Synapticulae
  (Taeniae are linked by synapticulae in early ontogenetic stages but rarely so in mature cups.)
• Repartition of synapticulae : Random
  (Taeniae are linked by synapticulae in early ontogenetic stages but rarely so in mature cups.)
• Intervallar cells : None
• Tabulae : Present
• Porosity of tabulae : Subdivided pores
• 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 external budding ; Branching by longitudinal subdivisions
• 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) : None (external plates and/or inner wall)
• Type of morphological tubes (IW) : None
• Additional sheath : Present on inner wall ; Present on outer wall (or single wall)
• Type of additional sheath (IW) : Sieve formed by protrusions
• Repartition of bracts on secondary sheath (IW) : No bract on additional sheath
• Type of additional sheath (OW/SW) : Sieve formed by protrusions
• 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 : Taeniae
• Repartition of vertical intervallar structures pores : ?
• Porosity of vertical intervallar structures : Coarsely porous
• Pores of vertical intervallar structures : Circular pores
• Link between vertical intervallar structures : None ; Synapticulae
  (Taeniae are linked by synapticulae in early ontogenetic stages but rarely so in mature cups.)
• Repartition of synapticulae : Random
  (Taeniae are linked by synapticulae in early ontogenetic stages but rarely so in mature cups.)
• Intervallar cells : None
• Tabulae : Present
• Building of tabulae : Extensions of both 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) : More than 2
• 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) : None (external plates and/or inner wall)
• Type of morphological tubes (IW) : None
• Additional sheath : Present on inner wall ; Present on outer wall (or single wall)
• Type of additional sheath (IW) : Sieve formed by protrusions
• Repartition of bracts on secondary sheath (IW) : No bract on additional sheath
• Type of sieve (IW) : Protrusions are completely connected
• Type of additional sheath (OW/SW) : Sieve formed by protrusions
• Repartition of bracts on additional sheath (OW/SW) : No bract on additional sheath
• Type of shieve (OW/SW) : Protrusions are completely connected
• Thorny corolla : None
• Vertical intervallar structures : Present
• Type of vertical intervallar structures : Taeniae
• Repartition of vertical intervallar structures pores : ?
• Porosity of vertical intervallar structures : Coarsely porous
• Pores of vertical intervallar structures : Circular pores
• Link between vertical intervallar structures : None ; Synapticulae
  (Taeniae are linked by synapticulae in early ontogenetic stages but rarely so in mature cups.)
• Repartition of synapticulae : Random
  (Taeniae are linked by synapticulae in early ontogenetic stages but rarely so in mature cups.)
• Intervallar cells : None
• Tabulae : Present
• Building of tabulae : Extensions of both walls
• Porosity of tabulae : Subdivided pores
• Chambers : None
• Other aquiferous unit : None

Tangential section

• Type of carcass pores (OW/SW) : Subdivided
• 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 ; Subdivided
• Repartition of bracts on secondary sheath (IW) : No bract on additional sheath
• Type of sieve (IW) : Protrusions are completely connected
• Repartition of micropores (IW) : Irregular
• Repartition of bracts on additional sheath (OW/SW) : No bract on additional sheath
• Type of shieve (OW/SW) : Protrusions are completely connected
• Repartition of micropores (OW/SW) : Irregular
• Thorny corolla : None
• Repartition of vertical intervallar structures pores : ?
• Porosity of vertical intervallar structures : Coarsely porous
• Pores of vertical intervallar structures : Circular pores
• Porosity of tabulae : Subdivided pores