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Florentinia neptuni
Florentinia? neptuni (Eisenack, 1958) Sarjeant, 1985
Now Achomosphaera. Originally Baltisphaeridium, subsequently (and now) Achomosphaera, thirdly (and now) Achomosphaera?, fourthly Spiniferites, fifthly Florentinia?.
Sarjeant, 1985, considered this to be a provisionally accepted species of Florentinia.
Lister and Batten, 1988, retained this species in Achomosphaera Evitt, 1963, without question.
Holotype: Eisenack, 1958, pl.26, fig.7; Sarjeant, 1985, pl.10, figs.1-2
Locus typicus: Borehole at Feld Heide, NW Germany
Stratum typicum: Early Cretaceous
Translation Eisenack, 1958: Sarjeant, 1985
Original description: Eisenack 1958, p. 399: Baltisphaeridium neptuni
Shell thin-walled, spherical to oval, bedecked with not very numerous broad-based, cylindrical to weakly conical processes; these are thin-walled, hollow and branch at their ends usually into three (rarely 2 or 4) strongly divergent processes, mostly tapering and pointed. The length of the processes is usually equal to the radius of the shell or somewhat less.
Dimensions: 12 specimens: shell diameter 40-60 Ám, total diameter 75-95 Ám; Holotype 48 Ám and 88 Ám respectively.
Emended description: Sarjeant, 1985, p.90, 92
Proximochorate to chorate cysts, intratabulate, with a spheroidal to broadly ovoidal central body. Processes all closed distally and of three principal types: (a) Large and cylindrical or compressed-cylindrical or saddle-shaped processes, giving rise to 4--6 short, bifurcate or ramifying branches, correspond to the largest paraplates. These processes exhibit, frequently or consistently, perforations of variable size and density; (b) Tubiform to ipniate or slightly tapering processes of smaller dimension, trifurcate or tetrafurcate c;istally and again often perforate, correspond to the other paraplates of the epitract and hypotract. These vary in size in relation to the paraplate to which they correspond; (c) Unbranched processes, acuminate or tapering, correspond to some, at least, of the small sulcal paraplates. Length of processes around 30% of the central body breadth. Sutures between paraplates not marked. Paratabulation gonyaulacacean, probably 4", 0a, 6", 6c, 5"?, 6""", 1p, 1"""". Surface of phragma granulate to shagreenate or reticulate.
Archaeopyle probably single-plate precingular (type P), formed by loss of paraplate 3".
Now Achomosphaera. Originally Baltisphaeridium, subsequently (and now) Achomosphaera, thirdly (and now) Achomosphaera?, fourthly Spiniferites, fifthly Florentinia?.
Sarjeant, 1985, considered this to be a provisionally accepted species of Florentinia.
Lister and Batten, 1988, retained this species in Achomosphaera Evitt, 1963, without question.
Holotype: Eisenack, 1958, pl.26, fig.7; Sarjeant, 1985, pl.10, figs.1-2
Locus typicus: Borehole at Feld Heide, NW Germany
Stratum typicum: Early Cretaceous
Translation Eisenack, 1958: Sarjeant, 1985
Original description: Eisenack 1958, p. 399: Baltisphaeridium neptuni
Shell thin-walled, spherical to oval, bedecked with not very numerous broad-based, cylindrical to weakly conical processes; these are thin-walled, hollow and branch at their ends usually into three (rarely 2 or 4) strongly divergent processes, mostly tapering and pointed. The length of the processes is usually equal to the radius of the shell or somewhat less.
Dimensions: 12 specimens: shell diameter 40-60 Ám, total diameter 75-95 Ám; Holotype 48 Ám and 88 Ám respectively.
Emended description: Sarjeant, 1985, p.90, 92
Proximochorate to chorate cysts, intratabulate, with a spheroidal to broadly ovoidal central body. Processes all closed distally and of three principal types: (a) Large and cylindrical or compressed-cylindrical or saddle-shaped processes, giving rise to 4--6 short, bifurcate or ramifying branches, correspond to the largest paraplates. These processes exhibit, frequently or consistently, perforations of variable size and density; (b) Tubiform to ipniate or slightly tapering processes of smaller dimension, trifurcate or tetrafurcate c;istally and again often perforate, correspond to the other paraplates of the epitract and hypotract. These vary in size in relation to the paraplate to which they correspond; (c) Unbranched processes, acuminate or tapering, correspond to some, at least, of the small sulcal paraplates. Length of processes around 30% of the central body breadth. Sutures between paraplates not marked. Paratabulation gonyaulacacean, probably 4", 0a, 6", 6c, 5"?, 6""", 1p, 1"""". Surface of phragma granulate to shagreenate or reticulate.
Archaeopyle probably single-plate precingular (type P), formed by loss of paraplate 3".