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Gardodinium ordinale
Gardodinium ordinale Davey, 1974
Originally (and now) Gardodinium, subsequently Chlamydophorella.
Davey, 1978, transferred this species to Chlamydophorella Cookson and Eisenack, 1958. Lentin and Williams, 1989, retained it in Gardodinium.
Holotype: Davey, 1974, pl.3, fig.6
Locus typicus: Speeton, England
Stratum typicum: Middle-Late Barremian
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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.
Gardodinium ordinale Davey, 1974. The endocyst has a short, well defined apical horn. The pericyst also has an apical horn truncated distally. The supporting processes are aligned just inside the plate boundaries. The central portions of the precingular and postcingular plates are mainly devoid of processes. The processes are solid, with or without vacuoles and expand distally against the outer wall. The archeopyle is apical with the operculum remaining attached. Gardodinium ordinale differs from G.trabeculosum by its process alignment, bald areas and by the non-angular shape of the outer wall. G.albertii has a dense covering of short spines on the central body. Size: central body length 38-53 µm, width 31-42 µm, length of apical horn 12-14 µm, maximum height of crests 3-5 µm.
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Original diagnosis: Davey, 1974, p.51
The cyst possesses an ovoidal central body surrounded by a weak, close fitting outer wall. The central body has a short, well defined blunt apical horn. The outer wall is also prolonged, in the apical region, to form a tapering horn which is truncated distally. The outer wall is supported by processes which are aligned just inside the plate boundaries. The central portions of the pre- and postcingular plates are, however, mainly devoid of processes. These plates and the cingulum are well defined but are hardly ected by the shape of the outer wall. The processes are solid, with or without vacuoles, aIld expand distally against the outer wall. The archaeopyle is apical, with the operculum often remaining in position.
Dimensions Holotype Range
Central body length 46 Ám 38(45)53 Ám
Central body width 36 Ám 31(38)42 Ám
Length of apical horn 12 Ám 12-14 Ám
Maximum height of crests 3 Ám 3-5 Ám
Original description: Davey, 1974, p.51
The alignment of the processes and often the presence of large areas practically devoid of processes is very noticeable. The alignment is best seen in the pre- and postcingular regions where on either side of the plate boundaries there is present a single line of processes. The outer wall is more or less equidistant from the central body with no distinctive angularities.
Affinities:
Davey, 1974, p.51: G. ordinale differs from G. trabeculosum (Gocht, 1959) by its process alignment, "bald " areas and by the non-angular shape of the outer wall. G. albertii Neale and Sarjeant (1962) differs by the possession of a dense covering of short spines on the central body.
Originally (and now) Gardodinium, subsequently Chlamydophorella.
Davey, 1978, transferred this species to Chlamydophorella Cookson and Eisenack, 1958. Lentin and Williams, 1989, retained it in Gardodinium.
Holotype: Davey, 1974, pl.3, fig.6
Locus typicus: Speeton, England
Stratum typicum: Middle-Late Barremian
--------------------------------------------------
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Gardodinium ordinale Davey, 1974. The endocyst has a short, well defined apical horn. The pericyst also has an apical horn truncated distally. The supporting processes are aligned just inside the plate boundaries. The central portions of the precingular and postcingular plates are mainly devoid of processes. The processes are solid, with or without vacuoles and expand distally against the outer wall. The archeopyle is apical with the operculum remaining attached. Gardodinium ordinale differs from G.trabeculosum by its process alignment, bald areas and by the non-angular shape of the outer wall. G.albertii has a dense covering of short spines on the central body. Size: central body length 38-53 µm, width 31-42 µm, length of apical horn 12-14 µm, maximum height of crests 3-5 µm.
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Original diagnosis: Davey, 1974, p.51
The cyst possesses an ovoidal central body surrounded by a weak, close fitting outer wall. The central body has a short, well defined blunt apical horn. The outer wall is also prolonged, in the apical region, to form a tapering horn which is truncated distally. The outer wall is supported by processes which are aligned just inside the plate boundaries. The central portions of the pre- and postcingular plates are, however, mainly devoid of processes. These plates and the cingulum are well defined but are hardly ected by the shape of the outer wall. The processes are solid, with or without vacuoles, aIld expand distally against the outer wall. The archaeopyle is apical, with the operculum often remaining in position.
Dimensions Holotype Range
Central body length 46 Ám 38(45)53 Ám
Central body width 36 Ám 31(38)42 Ám
Length of apical horn 12 Ám 12-14 Ám
Maximum height of crests 3 Ám 3-5 Ám
Original description: Davey, 1974, p.51
The alignment of the processes and often the presence of large areas practically devoid of processes is very noticeable. The alignment is best seen in the pre- and postcingular regions where on either side of the plate boundaries there is present a single line of processes. The outer wall is more or less equidistant from the central body with no distinctive angularities.
Affinities:
Davey, 1974, p.51: G. ordinale differs from G. trabeculosum (Gocht, 1959) by its process alignment, "bald " areas and by the non-angular shape of the outer wall. G. albertii Neale and Sarjeant (1962) differs by the possession of a dense covering of short spines on the central body.