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Susadinium scrofoides
From Fensome et al., 2019:
Susadinium scrofoides Dörhöfer and Davies, 1980, p.28–29, figs.13,24F,H–I,K,25A–D. Holotype: Dörhöfer and Davies, 1980, fig.24I; Fensome et al., 1993a, fig.1 — p.1311; fig.2 — p.1315. Originally (and now) Susadinium, subsequently Dodekovia. Lentin and Williams (1989, p.359) retained this species in Susadinium. Taxonomic junior synonyms: Parvocysta contracta and Facetodinium (as Susadinium) inflatum, both according to Below (1987a, p.120). Below (1987a, p.120) provided an emendation, but apparently for Dodekovia scrofoides var. scrofoides. Age: Toarcian– Bathonian.
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Locus typicus: Savik Formation, Reindeer Peninsula, Ellef Ringnes Island, Sverdrup Basin, Arctic Canada
Stratum typicum: Toarcian-Bathonian
Original description: Dörhöfer and Davies, 1980, p. 28-29
Diagnosis: A species of Susadinium with a short apical horn and rounded to angular intratabular protuberances in the pre- and postcingular plate series. Autophragm thin, smooth to granulate. Cingulum and sulcus broad. Tabulation 4', 5a, 6'', ?6c, 5''', ?1''''. Archeopyle 3I(plates 2-4).
Remarks: Autoblast often dorsoventrally compressed. The precingular series consists of five short rounded protuberances, the postcingular of three short dorsal and two larger bulging ventral protuberances flanking the sulcus. The apical horn is often sharply pointed with an apical angle of 35-40 degrees. Sutural granules sometimes delimit the apical plates and ventral cingular plates. The tabulation formula was obtained from plate sutures and intratabular protuberances.
The broad sulcal area might include additional plates of the pre- and postcingular series, which are not provided with intratabular protuberances. Cantulodinium protuberatum Wall, 1965 superficially resembles S. scrofoides, but due to its inadequate description and illustration closer comparisons are not possible. Length 29(38)42 µm; width 19(22)26 µm.
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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.
Susadinium scrofoides Dørhøfer and Davies, 1980. According to Below (1987a, p. 120), Susadinium scrofoides is proximate, acavate-apiculate, oblong ovoidal, apically also conical to tentoriate, with a broad cingular constriction and rounded areate protuberances, which reflect plates 1"’, 2"’, and 4"’, 5"’ fused basally or completely into large, broad dextro- or sinistrolateral evaginations; Wall composed of pedium and luxuria, surface smooth, scabrate or granulate. Protuberances distally unornamented, very coarsely shagreenate or with low baculi. Ornaments peniareate along margins of protuberances or also intraareate. Archeopyle anterior intercalary 2a with monoareate, secate operculum. Plate 1"” often reduced.
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Susadinium scrofoides Dörhöfer and Davies, 1980, p.28–29, figs.13,24F,H–I,K,25A–D. Holotype: Dörhöfer and Davies, 1980, fig.24I; Fensome et al., 1993a, fig.1 — p.1311; fig.2 — p.1315. Originally (and now) Susadinium, subsequently Dodekovia. Lentin and Williams (1989, p.359) retained this species in Susadinium. Taxonomic junior synonyms: Parvocysta contracta and Facetodinium (as Susadinium) inflatum, both according to Below (1987a, p.120). Below (1987a, p.120) provided an emendation, but apparently for Dodekovia scrofoides var. scrofoides. Age: Toarcian– Bathonian.
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Locus typicus: Savik Formation, Reindeer Peninsula, Ellef Ringnes Island, Sverdrup Basin, Arctic Canada
Stratum typicum: Toarcian-Bathonian
Original description: Dörhöfer and Davies, 1980, p. 28-29
Diagnosis: A species of Susadinium with a short apical horn and rounded to angular intratabular protuberances in the pre- and postcingular plate series. Autophragm thin, smooth to granulate. Cingulum and sulcus broad. Tabulation 4', 5a, 6'', ?6c, 5''', ?1''''. Archeopyle 3I(plates 2-4).
Remarks: Autoblast often dorsoventrally compressed. The precingular series consists of five short rounded protuberances, the postcingular of three short dorsal and two larger bulging ventral protuberances flanking the sulcus. The apical horn is often sharply pointed with an apical angle of 35-40 degrees. Sutural granules sometimes delimit the apical plates and ventral cingular plates. The tabulation formula was obtained from plate sutures and intratabular protuberances.
The broad sulcal area might include additional plates of the pre- and postcingular series, which are not provided with intratabular protuberances. Cantulodinium protuberatum Wall, 1965 superficially resembles S. scrofoides, but due to its inadequate description and illustration closer comparisons are not possible. Length 29(38)42 µm; width 19(22)26 µm.
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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.
Susadinium scrofoides Dørhøfer and Davies, 1980. According to Below (1987a, p. 120), Susadinium scrofoides is proximate, acavate-apiculate, oblong ovoidal, apically also conical to tentoriate, with a broad cingular constriction and rounded areate protuberances, which reflect plates 1"’, 2"’, and 4"’, 5"’ fused basally or completely into large, broad dextro- or sinistrolateral evaginations; Wall composed of pedium and luxuria, surface smooth, scabrate or granulate. Protuberances distally unornamented, very coarsely shagreenate or with low baculi. Ornaments peniareate along margins of protuberances or also intraareate. Archeopyle anterior intercalary 2a with monoareate, secate operculum. Plate 1"” often reduced.
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