Dictyocyathus
Dictyocyathus BORNEMANN, 1891a
Specimen-type: Dictyocyathus
tenerrimus lectotype, BORNEMANN, 1891, pl. 42, fig. 5, pl. 43,
fig. 4-6
Systematics:
Order: ARCHAEOCYATHIDA
Okulitch, 1935
Suborder: ARCHAEOCYATHINA Okulitch, 1935
Superfamily:
DICTYOCYATHOIDEA Taylor, 1910
Family: DICTYOCYATHIDAE
Taylor, 1910
Note:
Middle Cambrian organisms are only
present in Antarctica.
considered synonymous with
Molybdocyathus
DEBRENNE& GANGLOFF, 1990
Specimen-type: Molybdocyathus
juvenilis holotype, DEBRENNE, GANDIN& GANGLOFF, 1990, pl. 2, fig.
13
Systematics:
Order: ARCHAEOCYATHIDA
Okulitch, 1935
Suborder: ARCHAEOCYATHINA Okulitch, 1935
Superfamily:
DICTYOCYATHOIDEA Taylor, 1910
Family: DICTYOCYATHIDAE
Taylor, 1910
Dictyocyathus Molybdocyathus juvenilis DEBRENNE & GANGLOFF paratype USNM 443568, specimen IR 14.2 Botoman, Iron Canyon, Nevada, USA Longitudinal section (DEBRENNE, A. ZHURAVLEV & KRUSE, 2002). |
Dictyocyathus Molybdocyathus juvenilis DEBRENNE & GANGLOFF holotype USNM 443573, specimen IR 23.7a' Botoman, Iron Canyon, Nevada, USA Transverse and longitudinal sections (DEBRENNE, A. ZHURAVLEV & KRUSE, 2002). |
Dictyocyathus Dictyocyathus verticillus (BORNEMANN) lectotype GML 899c Botoman, Cuccuru Contu, Sardinia, Italy Transverse section (DEBRENNE, A. ZHURAVLEV & KRUSE, 2002) |
Dictyocyathus Dictyocyathus verticillus (BORNEMANN) topotype MNHN M84248, specimen CCC 9-1a Botoman, Cuccuru Contu, Sardinia, Italy Oblique longitudinal section (DEBRENNE, A. ZHURAVLEV & KRUSE, 2002) |
Dictyocyathus Dictyocyathus sp. specimen TAI1.1a1T MNHN, Paris collection F.&M. Debrenne Atdabanian, Jbel Taissa, Maroc Transverse section (by A. KERNER) |
Outer wall
- Structure of outer carcass wall (OW/SW) : Carcass wall not well defined
- Carcass perforations: outer wall or single wall (OW/SW) : Pores
- Type of carcass pores (OW/SW) : Irregular
- Size of carcass pores (OW/SW) : Uniform size
- Repartition of carcass pores (OW/SW) : Irregular repartition
- Relationship between rows of carcass pores and intersept (OW/SW) : 1
- 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 : None
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) : 1
- 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 : None
Intervallum
- Vertical intervallar structures : Present
- Type of vertical intervallar structures : Taeniae ; Dictyonal network
- Repartition of vertical intervallar structures pores : ?
- Porosity of vertical intervallar structures : ?
- Pores of vertical intervallar structures : Tetragonal pores
- Link between vertical intervallar structures : Synapticulae
- Repartition of synapticulae : At each interpore node
- 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 external budding ; Branching by longitudinal subdivisions
- Central Cavity (or internal if one wall) : Empty ; Full
- Thorny corolla : None
- Chambers : None
- Other aquiferous unit : None
-
Stratigraphical extension : Tommotian ; Atdabanian ; Botoman
; Middle Cambrian
(Middle Cambrian organisms are only present in Antarctica.) - Tommotian : 2 ; 3 ; 4
- Atdabanian : 1 ; 2 ; 3 ; 4
- Botoman : 1 ; 2
-
Geographical repartition : Antarctica ; China ; Europe ;
Kazakhstan ; Mongolia ; Morocco ; Russia ; USA
(Middle Cambrian organisms are only present in Antarctica. China: South China.) - Europe : Germany ; Iberia ; Italia: Sardinia
- Russia : Altay Sayan ; Far East ; Kolyma ; Siberian Platform ; Tuva
Systematic
- Orders : Archaeocyathida
- Suborders inside the Archaeocyathida : Archaeocyathina
- Superfamillies inside the Archaeocyathina : Dictyocyathoidea
- Famillies inside the Archaeocyathina : Dictyocyathidae
External view
- Cup shapes : Cylindrical-conical
- Shape of cup bulges : None
- Structure of outer carcass wall (OW/SW) : Carcass wall not 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 : None
- Thorny corolla : None
Transverse section
- Shape of cup bulges : None
- Number of walls : 2
- Structure of outer carcass wall (OW/SW) : Carcass wall not well defined
- Structure of inner carcass wall (IW) : Carcass wall well defined
- Habitus : Solitary ; Modular
- Central Cavity (or internal if one wall) : Empty ; Full
- Carcass perforations: outer wall or single wall (OW/SW) : Pores
- Relationship between rows of carcass pores and intersept (OW/SW) : 1
- 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 : None
- Thorny corolla : None
- Vertical intervallar structures : Present
- Type of vertical intervallar structures : Taeniae ; Dictyonal network
- Repartition of vertical intervallar structures pores : ?
- Link between vertical intervallar structures : Synapticulae
- Repartition of synapticulae : At each interpore node
- 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 not 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 ; Full
- 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 : None
- Thorny corolla : None
- Vertical intervallar structures : Present
- Type of vertical intervallar structures : Taeniae ; Dictyonal network
- Repartition of vertical intervallar structures pores : ?
- Porosity of vertical intervallar structures : ?
- Pores of vertical intervallar structures : Tetragonal pores
- Link between vertical intervallar structures : Synapticulae
- Repartition of synapticulae : At each interpore node
- 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 not well defined
- Structure of inner carcass wall (IW) : Carcass wall well defined
- Habitus : Solitary ; Modular
- Central Cavity (or internal if one wall) : Empty ; Full
- 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) : 1
- 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) : 1
- 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 : None
- Thorny corolla : None
- Vertical intervallar structures : Present
- Type of vertical intervallar structures : Taeniae ; Dictyonal network
- Repartition of vertical intervallar structures pores : ?
- Porosity of vertical intervallar structures : ?
- Pores of vertical intervallar structures : Tetragonal pores
- Link between vertical intervallar structures : Synapticulae
- Repartition of synapticulae : At each interpore node
- Intervallar cells : None
- Tabulae : none
- Chambers : None
- Other aquiferous unit : None
Tangential section
- Type of carcass pores (OW/SW) : Irregular
- Size of carcass pores (OW/SW) : Uniform size
- Repartition of carcass pores (OW/SW) : Irregular repartition
- Type of carcass pores (IW) : Simple
- Thorny corolla : None
- Repartition of vertical intervallar structures pores : ?
- Porosity of vertical intervallar structures : ?
- Pores of vertical intervallar structures : Tetragonal pores