Welcome to the Treatise on Invertebrate Paleontology!
Please enter a genera name to retrieve more information.
Toriyamaia
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Fusulinina
Superfamily:
Fusulinacea
Family:
Ozawainellidae
Formal Genus Name and Reference:
Toriyamaia KANMERA, 1956, *1013, p. 251
Type Species:
*T. laxiseptata, OD
Images
(Click to enlarge in a new window)
Fig. 299,2. *T. laxiseptata, Kozaki F., Kyushu, 2a, axial sec. of holotype, X25, 2 b, sagittal sec. of paratype, X25, 2 c, axial sec. of paratype, X25, 2 d, part of sagittal sec. showing structure of spirotheca, X100 (*1013).
Synonyms
Geographic Distribution
Japan
Age Range
Beginning Stage in Treatise Usage:
Perm.
Beginning International Stage:
Asselian
Fraction Up In Beginning Stage:
0
Beginning Date:
298.89
Ending Stage in Treatise Usage:
Perm.
Ending International Stage:
Changhsingian
Fraction Up In Ending Stage:
100
Ending Date:
251.9
Description
Shell small, elongate-fusiform to subcylindrical, with bluntly to broadly rounded polar ends, first 1 or 2 volutions discoidal, evolute, and coiled at right angles to outer cylindrical volutions, mature shape of shell reached in about first 4 volutions, proloculus minute, spherical, spirotheca thin, composed of tectum and less dense, structureless lower layer, septa very broadly spaced, unfluted, only 7 to each volution in outer part of the shell (*1013)
References
Museum or Author Information
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Fusulinina
Superfamily:
Fusulinacea
Family:
Ozawainellidae
Formal Genus Name and Reference:
Toriyamaia KANMERA, 1956, *1013, p. 251
Type Species:
*T. laxiseptata, OD
Images
(Click to enlarge in a new window)
Fig. 299,2. *T. laxiseptata, Kozaki F., Kyushu, 2a, axial sec. of holotype, X25, 2 b, sagittal sec. of paratype, X25, 2 c, axial sec. of paratype, X25, 2 d, part of sagittal sec. showing structure of spirotheca, X100 (*1013).
Synonyms
Geographic Distribution
Japan
Age Range
Beginning Stage in Treatise Usage:
Perm.
Beginning International Stage:
Asselian
Fraction Up In Beginning Stage:
0
Beginning Date:
298.89
Ending Stage in Treatise Usage:
Perm.
Ending International Stage:
Changhsingian
Fraction Up In Ending Stage:
100
Ending Date:
251.9
Description
Shell small, elongate-fusiform to subcylindrical, with bluntly to broadly rounded polar ends, first 1 or 2 volutions discoidal, evolute, and coiled at right angles to outer cylindrical volutions, mature shape of shell reached in about first 4 volutions, proloculus minute, spherical, spirotheca thin, composed of tectum and less dense, structureless lower layer, septa very broadly spaced, unfluted, only 7 to each volution in outer part of the shell (*1013)