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Mendicodinium spinosum ssp. spinosum
Mendicodinium spinosum subsp. spinosum Bucefalo Palliani et al. 1997a
Holotype: Bucefalo Palliani et al. 1997a: Plate I, 7, 8
Type locality: Colle d"Orlando section, Marne di Monte Serrone Formation, central Italy.
Stratigraphic horizon: Lower Toarcian, lower D. tenuicostatum Zone.
Original Diagnosis: Bucefalo Palliani et al. 1997a, p. 105-106
A subspecies of Mendicodinium spinosum which has a smooth autophragm and spines.
Original Description: Bucefalo Palliani et al. 1997a, p. 105-106
Ellipsoidal, proximochorate small dinoflagellate cysts which are markedly elongate equatorially. Autophragm relatively thick and smooth, surmounted by nontabular, solid, distally tapering spines. The hypocyst may be significantly larger than the epicyst.
Dimensions: Holotype: Length 26Ám, width 28Ám, spines 3Ám.
Overall cyst length: minimum 16Ám; mean 22.4Ám; maximum 26Ám. Overall cyst width: minimum 18Ám; mean 24.8Ám; maximum 28Ám. Length of spines: minimum 3Ám; mean 4.8Ám; maximum 5Ám (15 specimens measured).
Discussion: Bucefalo Palliani et al. 1997a, p. 105-106
This subspecies is distinguished from Mendicodinium spinosum subsp. perforatum Bucefalo Palliani, Riding et Torricelli, sp. nov. in having smooth autophragm and spines.
Holotype: Bucefalo Palliani et al. 1997a: Plate I, 7, 8
Type locality: Colle d"Orlando section, Marne di Monte Serrone Formation, central Italy.
Stratigraphic horizon: Lower Toarcian, lower D. tenuicostatum Zone.
Original Diagnosis: Bucefalo Palliani et al. 1997a, p. 105-106
A subspecies of Mendicodinium spinosum which has a smooth autophragm and spines.
Original Description: Bucefalo Palliani et al. 1997a, p. 105-106
Ellipsoidal, proximochorate small dinoflagellate cysts which are markedly elongate equatorially. Autophragm relatively thick and smooth, surmounted by nontabular, solid, distally tapering spines. The hypocyst may be significantly larger than the epicyst.
Dimensions: Holotype: Length 26Ám, width 28Ám, spines 3Ám.
Overall cyst length: minimum 16Ám; mean 22.4Ám; maximum 26Ám. Overall cyst width: minimum 18Ám; mean 24.8Ám; maximum 28Ám. Length of spines: minimum 3Ám; mean 4.8Ám; maximum 5Ám (15 specimens measured).
Discussion: Bucefalo Palliani et al. 1997a, p. 105-106
This subspecies is distinguished from Mendicodinium spinosum subsp. perforatum Bucefalo Palliani, Riding et Torricelli, sp. nov. in having smooth autophragm and spines.