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Florentinia abjuncta
Florentinia abjuncta Duxbury, 1983
Holotype: Duxbury, 1983, pl.6, figs.9,10
Locus typicus: Compton Bay section, Isle of Wight, England
Stratum typicum: Early Albian
Original diagnosis: Duxbury, 1983, p. 46
A species of Florentinia possessing a spheroidal to ovoidal central body with a distinct, distally closed and rounded apical projection. The periphragm is produced into numerous slender, proximally broad-based and distally capitate process elements which may occasionally be proximally united. A large, broad-based and distally tapering antapical process is present and this is open with a ragged margin at its distal extremity. The process elements and antapical process are smooth, but the main body is densely, though finely granular. The archeopyle is formed by detachment of a single, mid-dorsal paraplate (3").
Observed Dimensions: Holotype 70x67 Ám. Overall 81(73)67x81(67)58 Ám.
Affinities:
Duxbury, 1983, p. 46-47: This species is distinguished by its numerous process elements (representing relatively few actual processes), by its granular body surface, by its apical projection and by its distally open antapical process. The most closely comparable species are Florentinia resex Davey and Verdier, 1976 and F. interrupta Duxbury, 1980. F. abjuncta differs from the former in possessing a distally open antapical horn and an apical projection. It differs from the latter in lacking striae on the processes, in being granular rather than having a microreticulate body surface, in having processes typically broken down into individual elements and in having an apical projection. Florentinia radiculata Davey and Verdier, 1973 is similar to F. abjuncta in possessing slender, capitate process elements but differs in having notably fewer such elements and in having an antapical process which is narrow and sometimes difficult to distinguish in certain orientations. Also, F. radiculata is very distinctive in possessing processes which display a single, deep, primary bifurcation (see pl. 4, figs. 4 and 6 in Davey and Verdier, 1971 and compare figs. 9 and 10 with fig. 13 in pl. 6, herein).
Holotype: Duxbury, 1983, pl.6, figs.9,10
Locus typicus: Compton Bay section, Isle of Wight, England
Stratum typicum: Early Albian
Original diagnosis: Duxbury, 1983, p. 46
A species of Florentinia possessing a spheroidal to ovoidal central body with a distinct, distally closed and rounded apical projection. The periphragm is produced into numerous slender, proximally broad-based and distally capitate process elements which may occasionally be proximally united. A large, broad-based and distally tapering antapical process is present and this is open with a ragged margin at its distal extremity. The process elements and antapical process are smooth, but the main body is densely, though finely granular. The archeopyle is formed by detachment of a single, mid-dorsal paraplate (3").
Observed Dimensions: Holotype 70x67 Ám. Overall 81(73)67x81(67)58 Ám.
Affinities:
Duxbury, 1983, p. 46-47: This species is distinguished by its numerous process elements (representing relatively few actual processes), by its granular body surface, by its apical projection and by its distally open antapical process. The most closely comparable species are Florentinia resex Davey and Verdier, 1976 and F. interrupta Duxbury, 1980. F. abjuncta differs from the former in possessing a distally open antapical horn and an apical projection. It differs from the latter in lacking striae on the processes, in being granular rather than having a microreticulate body surface, in having processes typically broken down into individual elements and in having an apical projection. Florentinia radiculata Davey and Verdier, 1973 is similar to F. abjuncta in possessing slender, capitate process elements but differs in having notably fewer such elements and in having an antapical process which is narrow and sometimes difficult to distinguish in certain orientations. Also, F. radiculata is very distinctive in possessing processes which display a single, deep, primary bifurcation (see pl. 4, figs. 4 and 6 in Davey and Verdier, 1971 and compare figs. 9 and 10 with fig. 13 in pl. 6, herein).