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Spiniferites ovatus
Spiniferites ovatus Matsuoka, 1983
Junior homonym: Spiniferites ovatus Bujak, 1984.
Holotype: Matsuoka, 1983, pl.3, figs.1a-c
Locus typicus: Teradomari Teradomari-cho, Niigata Prefecture, Central Japan.
Stratum typicum: Teradomari Formation - Late Miocene.
Age: Late Miocene
Original diagnosis: Matsuoka 1983, p. 134: Spiniferites ovatus
Subspherical to ovoidal cyst. Processes gonal only, and membraneous, somewhat fibrous, and buccinate to tubiform. Distal extremities of processes irregularily furcate, foliate or denticulate. Parasutural septa clear near the proximal base of processes, but weakly developed between processes.
Original description: : Matsuoka 1983, p. 135: Spiniferites ovatus
The intermediate proximochorate cyst is subspherical to ovoidal in shape and composed of two layers, thin endophragm and periphragm adpressed between processes. The surface of the periphragm is faintly granular. The processes comprise a gonal type only and are basically buccinate to tubiform, though the specimens of the Niigata district are ill-preserved and damaged. The distal part of the processes are irregularily furcate, foliate or sometimes denticulate. Some cingular processes which are probaly correspond to the 2c and 4c or 5c are slightly larger than others. The parasutural septa become membraneous near the proximal base of the processes, but are weakly developed between processes. The paratabulation may coincide with that of this genus. The archeopyle is a simple precingular type formed by dislacement of the 3" paraplate.
Dimensions: Holotype: Length of cyst 53 µm, width of cyst 46 µm, length of processes 12-24 µm. Other specimens: Length of cyst 50-64 µm, width of cyst 43-59 µm, length of processes 12-26 µm. Number of specimens measured: 20.
Remarks: Matsuoka 1983, p. 135
Spiniferites ovatus sp. nov. apparently resembles Cordosphaeridium sp. cf. biarmatum described by GOCHT (1969) owing to have membraneous gonal processes and unclear parasutural septa between the processes. This species, however, differs from the latter in possessing gonal rather than intratabular processes. The present species is, also, similar to Spiniferites pseudofurcatus (KLUMPP) in bearing gonal and buccinate to tubiform processes but different from the latter in that processes are more membraneous and the periphragm is thinner.
Junior homonym: Spiniferites ovatus Bujak, 1984.
Holotype: Matsuoka, 1983, pl.3, figs.1a-c
Locus typicus: Teradomari Teradomari-cho, Niigata Prefecture, Central Japan.
Stratum typicum: Teradomari Formation - Late Miocene.
Age: Late Miocene
Original diagnosis: Matsuoka 1983, p. 134: Spiniferites ovatus
Subspherical to ovoidal cyst. Processes gonal only, and membraneous, somewhat fibrous, and buccinate to tubiform. Distal extremities of processes irregularily furcate, foliate or denticulate. Parasutural septa clear near the proximal base of processes, but weakly developed between processes.
Original description: : Matsuoka 1983, p. 135: Spiniferites ovatus
The intermediate proximochorate cyst is subspherical to ovoidal in shape and composed of two layers, thin endophragm and periphragm adpressed between processes. The surface of the periphragm is faintly granular. The processes comprise a gonal type only and are basically buccinate to tubiform, though the specimens of the Niigata district are ill-preserved and damaged. The distal part of the processes are irregularily furcate, foliate or sometimes denticulate. Some cingular processes which are probaly correspond to the 2c and 4c or 5c are slightly larger than others. The parasutural septa become membraneous near the proximal base of the processes, but are weakly developed between processes. The paratabulation may coincide with that of this genus. The archeopyle is a simple precingular type formed by dislacement of the 3" paraplate.
Dimensions: Holotype: Length of cyst 53 µm, width of cyst 46 µm, length of processes 12-24 µm. Other specimens: Length of cyst 50-64 µm, width of cyst 43-59 µm, length of processes 12-26 µm. Number of specimens measured: 20.
Remarks: Matsuoka 1983, p. 135
Spiniferites ovatus sp. nov. apparently resembles Cordosphaeridium sp. cf. biarmatum described by GOCHT (1969) owing to have membraneous gonal processes and unclear parasutural septa between the processes. This species, however, differs from the latter in possessing gonal rather than intratabular processes. The present species is, also, similar to Spiniferites pseudofurcatus (KLUMPP) in bearing gonal and buccinate to tubiform processes but different from the latter in that processes are more membraneous and the periphragm is thinner.