Parethmophyllum

Parethmophyllum DEBRENNE, 1987

Specimen-type: Ethmophyllum cooperi holotype, OKULITCH in COOPER& others, 1952, pl. 7, fig. 1-2, pl. 9, fig. 4

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

Parethmophyllum Parethmophyllum cooperi (OKULITCH) paratype USNM 111813 Botoman, Caborca, Sonora, Mexico Oblique longitudinal section (DEBRENNE, A. ZHURAVLEV & KRUSE, 2002)

Parethmophyllum Parethmophyllum cooperi (OKULITCH) holotype USNM 111814 Botoman, Caborca, Sonora, Mexico Longitudinal section (DEBRENNE, A. ZHURAVLEV & KRUSE, 2002)

Parethmophyllum Parethmophyllum cooperi (OKULITCH) holotype USNM 111814 Botoman, Caborca, Sonora, Mexico Transverse 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) : 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) : None
• Stipules : Present on inner carcass wall
• Type of morphological tubes (OW/SW) : None
• Additional sheath : None

Inner wall

• Structure of inner carcass wall (IW) : Carcass wall well defined
• Stipules : Present on inner carcass wall
• Carcass perforations: inner wall (IW) : Canals
• Constitution of carcass canal system (IW) : 1 zone
• 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)
• Building of carcass perforations (IW) : With participation of vertical intervallar structures
• Carcass external plates: inner carcass wall (IW) : Present
• Type of carcass external plates (IW) : Bracts
• Localisation of carcass bracts (IW) : Bract arises on inner wall
• Shape of carcass external plates (IW) : Planar
• Direction of carcass external plates (IW) : Upwardly projecting
• Type of morphological tubes (IW) : ?
• Additional sheath : None

Intervallum

• Vertical intervallar structures : Present
• Type of vertical intervallar structures : Septa
• Repartition of vertical intervallar structures pores : Aporous ; Sparsely porous
• Porosity of vertical intervallar structures : Aporous ; Finely porous
• Pores of vertical intervallar structures : Aporous ; Circular pores
• Link between vertical intervallar structures : None
• 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 longitudinal subdivisions ; Catenulate
• Central Cavity (or internal if one wall) : Empty ; Reduce
• Thorny corolla : None
• Chambers : None
• Other aquiferous unit : None
• Stratigraphical extension : Botoman
• Botoman : 1
• Geographical repartition : Mexico ; USA

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) : None
• Carcass external plates: inner carcass wall (IW) : Present
• Type of carcass external plates (IW) : Bracts
• Localisation of carcass bracts (IW) : Bract arises on inner wall
• Shape of carcass external plates (IW) : Planar
• Direction of carcass external plates (IW) : Upwardly projecting
• 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) : None
• Carcass perforations: inner wall (IW) : Canals
• Relationship between carcass canals zone A and intersept (IW) : 1 row of canals per intersept
• Building of carcass perforations (IW) : With participation of vertical intervallar structures
• Carcass external plates: inner carcass wall (IW) : Present
• Additional sheath : None
• Thorny corolla : None
• Vertical intervallar structures : Present
• Type of vertical intervallar structures : Septa
• Repartition of vertical intervallar structures pores : Aporous ; Sparsely porous
• Link between vertical intervallar structures : None
• 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 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) : None
• Stipules : Present on inner carcass wall
• Type of morphological tubes (OW/SW) : None
• Carcass perforations: inner wall (IW) : Canals
• Constitution of carcass canal system (IW) : 1 zone
• 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)
• Carcass external plates: inner carcass wall (IW) : Present
• Type of carcass external plates (IW) : Bracts
• Localisation of carcass bracts (IW) : Bract arises on inner wall
• Shape of carcass external plates (IW) : Planar
• Direction of carcass external plates (IW) : Upwardly projecting
• Type of morphological tubes (IW) : ?
• Additional sheath : None
• Thorny corolla : None
• Vertical intervallar structures : Present
• Type of vertical intervallar structures : Septa
• Repartition of vertical intervallar structures pores : Aporous ; Sparsely porous
• Porosity of vertical intervallar structures : Aporous ; Finely porous
• Pores of vertical intervallar structures : Aporous ; Circular pores
• Link between vertical intervallar structures : None
• 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 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) : None
• Stipules : Present on inner carcass wall
• Type of morphological tubes (OW/SW) : None
• Carcass perforations: inner wall (IW) : Canals
• Constitution of carcass canal system (IW) : 1 zone
• 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)
• Building of carcass perforations (IW) : With participation of vertical intervallar structures
• Carcass external plates: inner carcass wall (IW) : Present
• Type of morphological tubes (IW) : ?
• Additional sheath : None
• Thorny corolla : None
• Vertical intervallar structures : Present
• Type of vertical intervallar structures : Septa
• Repartition of vertical intervallar structures pores : Aporous ; Sparsely porous
• Porosity of vertical intervallar structures : Aporous ; Finely porous
• Pores of vertical intervallar structures : Aporous ; Circular pores
• Link between vertical intervallar structures : None
• Intervallar cells : None
• Tabulae : none
• Chambers : None
• Other aquiferous unit : None

Tangential section

• Thorny corolla : None
• Repartition of vertical intervallar structures pores : Aporous ; Sparsely porous
• Porosity of vertical intervallar structures : Aporous ; Finely porous
• Pores of vertical intervallar structures : Aporous ; Circular pores