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Gochteodinia judilentiniae
Gochteodinia judilentiniae McIntyre and Brideaux, 1980
Holotype: McIntyre and Brideaux 1980, pl.11, figs4-5,7-8
Locus typicus: District of Mackenzie, Canada
Stratum typicum: Valanginian
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G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Gochteodinia judilentinae McIntyre and Brideaux, 1980, is elongate, with variably developed apical horn terminated by an apiculate process, 5-12 µm long. Periphragm forming hollow tubular processes open distally with slightly flared margins and, in places, projecting into long aculei, typically 8. Aculei are 4-8 µm long. Processes are 12-24 in number and 10-20 µm long. Archeopyle resulting from loss of two anterior intercalary plates. Size: length 105-124 µm, width 28-46 µm.
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Original diagnosis: McIntyre and Brideaux, 1980, p. 24
Shape: Pericyst - Ambitus elongate; apical horn variable in length, distal part solid, and terminated by an apiculate process, 5-12 µm long; remaining pericyst pyriform with convex sides; antapex rounded; slight dorsoventral compression. Endocyst - Commonly obscure, visible under the origins of processes; closely appressed to the pericyst. Pericoels - Absent.
Phragma: Periphragm - Less than 1.0 µm thick; except the distal solid part of the apical horn; surface sculpture smooth or scabrate; periphragm forming hollow, tubular processes, open distally, the margins flared slightly and in places thickened, projecting into long aculei, typically eight in number on well preserved processes; aculei 4-8 µm long; processes 12 to 24 in number and 10-20 µm in length; processes reduced or absent on the apical horn; processes on the epiperiphragm dividing basally, the slightly thickened splays diverging and then merging with the smooth periphragm. Endophragm - Commonly obscure, less than 0.5 µm thick; presumably smooth.
Paratabulation. Pericyst - Denoted only in the vicinity of the intercalary archeopyle. Processes on some specimens show a distinct circumferential clustering suggesting apical or? intercalary, precingular and postcingular groupings.
Endocyst - Indication of paratabulation absent except in vicinity of the archeopyle.
Pericingulum - Position on some specimens indicated by an absence of processes in a circumferential belt below the mid-latitude of the pericyst, or by reduction of the number and morphology of the processes to one or two thin, acuminate, distally closed examples. Perisulcus - Not indicated.
Archeopyle: Intercalary, Type 2I(2a, 3a). Operculum free, compound, observed opercular pieces bearing one process each.
Dimensions. Pericyst length 105-124 µm, width (maximum width) 28-46 µm.
Affinities:
McIntyre and Brideaux, 1980, p.24: Gochteodinia judilentinae differs from
Gochteodinia villosa (Vozzhennikova) Norris in possession of slightly flared processes with distal aculeate extensions and processess which are splayed basally on the epiperiphragm.
Holotype: McIntyre and Brideaux 1980, pl.11, figs4-5,7-8
Locus typicus: District of Mackenzie, Canada
Stratum typicum: Valanginian
--------------------------------------------------
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Gochteodinia judilentinae McIntyre and Brideaux, 1980, is elongate, with variably developed apical horn terminated by an apiculate process, 5-12 µm long. Periphragm forming hollow tubular processes open distally with slightly flared margins and, in places, projecting into long aculei, typically 8. Aculei are 4-8 µm long. Processes are 12-24 in number and 10-20 µm long. Archeopyle resulting from loss of two anterior intercalary plates. Size: length 105-124 µm, width 28-46 µm.
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Original diagnosis: McIntyre and Brideaux, 1980, p. 24
Shape: Pericyst - Ambitus elongate; apical horn variable in length, distal part solid, and terminated by an apiculate process, 5-12 µm long; remaining pericyst pyriform with convex sides; antapex rounded; slight dorsoventral compression. Endocyst - Commonly obscure, visible under the origins of processes; closely appressed to the pericyst. Pericoels - Absent.
Phragma: Periphragm - Less than 1.0 µm thick; except the distal solid part of the apical horn; surface sculpture smooth or scabrate; periphragm forming hollow, tubular processes, open distally, the margins flared slightly and in places thickened, projecting into long aculei, typically eight in number on well preserved processes; aculei 4-8 µm long; processes 12 to 24 in number and 10-20 µm in length; processes reduced or absent on the apical horn; processes on the epiperiphragm dividing basally, the slightly thickened splays diverging and then merging with the smooth periphragm. Endophragm - Commonly obscure, less than 0.5 µm thick; presumably smooth.
Paratabulation. Pericyst - Denoted only in the vicinity of the intercalary archeopyle. Processes on some specimens show a distinct circumferential clustering suggesting apical or? intercalary, precingular and postcingular groupings.
Endocyst - Indication of paratabulation absent except in vicinity of the archeopyle.
Pericingulum - Position on some specimens indicated by an absence of processes in a circumferential belt below the mid-latitude of the pericyst, or by reduction of the number and morphology of the processes to one or two thin, acuminate, distally closed examples. Perisulcus - Not indicated.
Archeopyle: Intercalary, Type 2I(2a, 3a). Operculum free, compound, observed opercular pieces bearing one process each.
Dimensions. Pericyst length 105-124 µm, width (maximum width) 28-46 µm.
Affinities:
McIntyre and Brideaux, 1980, p.24: Gochteodinia judilentinae differs from
Gochteodinia villosa (Vozzhennikova) Norris in possession of slightly flared processes with distal aculeate extensions and processess which are splayed basally on the epiperiphragm.