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Spiniferites tripus
Spiniferites tripus Singh, 1983
Holotype: Singh, 1983, pl.51, fig.2
Locus typicus: Peace River area, Canada
Stratum typicum: Early Cenomanian
Original description: Singh, 1983, p. 144
Skolochorate cysts; central body subspherical to ovoidal, bearing gonal processes with trifurcate and intergonal processes with bifurcate tips; primary furcations usually bifurcating again one or more times; processes joined at their bases by parasutural crests; three antapical gonal processes on the dorsal and lateral sides of the paraplate 1"""" significantly larger than the other processes; dorsal antapical gonal process usually the largest of the three; the lower half of the antapical gonal processes often fused to form an antapical flange; remaining processes mostly concentrated in the cingular and apical regions; processes tapering and closed distally; periphragm finely granular; paratabulation outlined by the parasutural crests gonyaulacacean, typical for the genus, formula: 3-4", 5-6", 6c, 5-6""", 1p, 1""""; paracingulum helicoidal; ventral ends of the paracingulum offset by about one cingular width; parasulcus distinct, outlined by parasutural crests on the ventral hypocyst; archeopyle precingular, type P (3" only); operculum free, often remaining in place or slightly displaced.
Size range: Overall dimension including the processes 46(59)67 µm. Holotype 66 µm. Length of the central body 30(38)43 µm. Holotype 41 µm. Breadth of the central body 30(36)40 µm. Holotype 37 µm. Length of the antapical processes 12(15)24 µm. Holotype 24 µm. Breadth of the antapical processes 5(10)14 µm. Holotype 12 µm. Length of the remaining processes 6(9)16 µm. Holotype 9 to 15 µm. Specimens measured 20.
Affinities:
Singh, 1983, p. 145: Spiniferites tripus is characterized by three very large antapical gonal processes on the dorsal and lateral sides of the paraplate 1"""".
Spiniferites membranaceus (Rossignol) Sarjeant, 1970, and Spiniferites mirabilis (Rossignol) Sarjeant, 1970, recorded from the strata of Quaternary age of Israel and bottom of the Caribbean Sea (Rossignol, 1964; Wall, 1967), remotely resemble S. tripus in possessing an enlarged antapical flange. However, S. tripus differs in being considerably smaller, having three large, distinct, antapical, gonal processes, and in lacking the sulcal platelets described by Wall (1967).
Holotype: Singh, 1983, pl.51, fig.2
Locus typicus: Peace River area, Canada
Stratum typicum: Early Cenomanian
Original description: Singh, 1983, p. 144
Skolochorate cysts; central body subspherical to ovoidal, bearing gonal processes with trifurcate and intergonal processes with bifurcate tips; primary furcations usually bifurcating again one or more times; processes joined at their bases by parasutural crests; three antapical gonal processes on the dorsal and lateral sides of the paraplate 1"""" significantly larger than the other processes; dorsal antapical gonal process usually the largest of the three; the lower half of the antapical gonal processes often fused to form an antapical flange; remaining processes mostly concentrated in the cingular and apical regions; processes tapering and closed distally; periphragm finely granular; paratabulation outlined by the parasutural crests gonyaulacacean, typical for the genus, formula: 3-4", 5-6", 6c, 5-6""", 1p, 1""""; paracingulum helicoidal; ventral ends of the paracingulum offset by about one cingular width; parasulcus distinct, outlined by parasutural crests on the ventral hypocyst; archeopyle precingular, type P (3" only); operculum free, often remaining in place or slightly displaced.
Size range: Overall dimension including the processes 46(59)67 µm. Holotype 66 µm. Length of the central body 30(38)43 µm. Holotype 41 µm. Breadth of the central body 30(36)40 µm. Holotype 37 µm. Length of the antapical processes 12(15)24 µm. Holotype 24 µm. Breadth of the antapical processes 5(10)14 µm. Holotype 12 µm. Length of the remaining processes 6(9)16 µm. Holotype 9 to 15 µm. Specimens measured 20.
Affinities:
Singh, 1983, p. 145: Spiniferites tripus is characterized by three very large antapical gonal processes on the dorsal and lateral sides of the paraplate 1"""".
Spiniferites membranaceus (Rossignol) Sarjeant, 1970, and Spiniferites mirabilis (Rossignol) Sarjeant, 1970, recorded from the strata of Quaternary age of Israel and bottom of the Caribbean Sea (Rossignol, 1964; Wall, 1967), remotely resemble S. tripus in possessing an enlarged antapical flange. However, S. tripus differs in being considerably smaller, having three large, distinct, antapical, gonal processes, and in lacking the sulcal platelets described by Wall (1967).