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Systematophora urbinii
Systematophora urbinii Biffi and Manum, 1988
Holotype: Biffi and manum 1988: Pl. 8, fig. 2
Locus typicus: Montebello d'Urbino Section; Bisciaro Fm.;
Stratum typicum: Early Miocene.
Age: Early Miocene
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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.
Systematophora urbinii, Biffi and Manum, 1988. Diagnosis from Biffi and Manum (1988, p.196). cyst skolochorate, subspherical in shape with fibrous, often proximally fused processes, arranged in vaguely indicated annular complexes. Surface smooth to slightly punctate. Archeopyle apical type tA with free operculum. Processes often fused proximally and subdivided distally at least for one third of the stem. Their general shape is tapering, distally expanded and irregularly bifid. Size: cyst width 50-76 µm, length without operculum 44-60 µm, process length 20-40 µm.
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Orignal diagnosis: Biffi and Manum 1988, p. 196
Cyst skolochorate, subsphaerical in shape, with fibrous, often proximally fused processes, arranged in vaguely indicated annular complexes. Surface smooth to slightly punctate. Archeopyle apical, type tA, with free operculum.
Dimensions--Holotype: cyst breadth 72 µm; cyst length 52 µm; cyst length with operculum 76 µm; length of processes 20-30 µm. Mean values (bracketed) and extremes (n = 10): cyst breadth 50(62)76 µm; cyst length without operculum 44(52)60 µm; length of processes 20(26)40 µm.
Original description: Biffi and Manum 1988, p. 196
Cyst skolochorate, of subsphaerical shape, with annular to arcuate penitabular complexes of fibrous processes; processes are often fused proximally and subdivided distally at least for one third of the stem; their general shape is tapering, distally expanded and irregularly bifid. Autophragm between process groups is fairly punctate, as also the process stems in part. Paratabulation is incompletely indicated by the process groups. Archeopyle apical, type tA; operculum free and generally detached. The recovered specimens have not allowed to control the archeopyle suture and the operculum features. No clear indications of paracingulum and parasulcus.
Remarks: Systematophora urbinii n. sp. is rather typical and differs from S. ancyrea Cookson & Eisenack, 1965 and S. placacantha (Deflandre & Cookson) Davey et al., 1969 in having fibrous and proximally connected (1/3 height) processes.
Occurences:
Monte Conero SR lOOi - SR 1005 common
Montebello d'Urbino PAL 11 j - PAL 126 abundant
Holotype: Biffi and manum 1988: Pl. 8, fig. 2
Locus typicus: Montebello d'Urbino Section; Bisciaro Fm.;
Stratum typicum: Early Miocene.
Age: Early Miocene
--------------------------------------------------
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Systematophora urbinii, Biffi and Manum, 1988. Diagnosis from Biffi and Manum (1988, p.196). cyst skolochorate, subspherical in shape with fibrous, often proximally fused processes, arranged in vaguely indicated annular complexes. Surface smooth to slightly punctate. Archeopyle apical type tA with free operculum. Processes often fused proximally and subdivided distally at least for one third of the stem. Their general shape is tapering, distally expanded and irregularly bifid. Size: cyst width 50-76 µm, length without operculum 44-60 µm, process length 20-40 µm.
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Orignal diagnosis: Biffi and Manum 1988, p. 196
Cyst skolochorate, subsphaerical in shape, with fibrous, often proximally fused processes, arranged in vaguely indicated annular complexes. Surface smooth to slightly punctate. Archeopyle apical, type tA, with free operculum.
Dimensions--Holotype: cyst breadth 72 µm; cyst length 52 µm; cyst length with operculum 76 µm; length of processes 20-30 µm. Mean values (bracketed) and extremes (n = 10): cyst breadth 50(62)76 µm; cyst length without operculum 44(52)60 µm; length of processes 20(26)40 µm.
Original description: Biffi and Manum 1988, p. 196
Cyst skolochorate, of subsphaerical shape, with annular to arcuate penitabular complexes of fibrous processes; processes are often fused proximally and subdivided distally at least for one third of the stem; their general shape is tapering, distally expanded and irregularly bifid. Autophragm between process groups is fairly punctate, as also the process stems in part. Paratabulation is incompletely indicated by the process groups. Archeopyle apical, type tA; operculum free and generally detached. The recovered specimens have not allowed to control the archeopyle suture and the operculum features. No clear indications of paracingulum and parasulcus.
Remarks: Systematophora urbinii n. sp. is rather typical and differs from S. ancyrea Cookson & Eisenack, 1965 and S. placacantha (Deflandre & Cookson) Davey et al., 1969 in having fibrous and proximally connected (1/3 height) processes.
Occurences:
Monte Conero SR lOOi - SR 1005 common
Montebello d'Urbino PAL 11 j - PAL 126 abundant