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Batiacasphaera micropapillata
Batiacasphaera micropapillata, Stover, 1977
Head in Head and Wrenn (1992, p.3) and Schreck and Matthiessen (2013, p.295) considered this species to be the possible taxonomic senior synonym of Tectatodinium (now Batiacasphaea) minutum.
Holotype: Stover, 1977, pl.1, fig.7
Locus typicus: Corehole 5/5B, Blake Plateau, Western N Atlantic
Stratum typicum: Middle Oligocene
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Original description: [Stover, 1977, p. 73]:
Description:
Cysts are subspherical, however, their shape is commonly modified by folding.
Autophragm is thin, about 0.5 µm, and its outer surface is finely papillate, finely granulate or microreticulate with the ornamentation on individual specimens usually of a single type and uniformly distributed.
Archeopyle is apical, type A, and its principal suture is moderately angular; accessory sutures between precingular paraplates are rarely present. Operculum is free, large relative to cyst diameter, and its constituent paraplates are not differentiated on opercular surface.
Paratabulation expressed by archeopyle only; cysts lack indications of paracingulum and parasulcus.
Dimensions:
Overall size 28 to 42 µm.
Affinities:
Batiacasphaera micropapillata differs from B. hirsuta by having small papillae, granules or microreticulation on the autophragm rather than slender, hairlike projections. Most specimens of B. micropapillata are smaller than those of B. hirsuta.
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Notes:
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999
Batiacasphaera micropapillata Stover, 1977, can be finely papillate, finely granulate or microreticulate with the ornamentation on a single specimen of the same type. Head (1992) suggested that microreticulate forms of B.micropapillata be included in B. minuta.
Size: overall 28-42 µm.
Head in Head and Wrenn (1992, p.3) and Schreck and Matthiessen (2013, p.295) considered this species to be the possible taxonomic senior synonym of Tectatodinium (now Batiacasphaea) minutum.
Holotype: Stover, 1977, pl.1, fig.7
Locus typicus: Corehole 5/5B, Blake Plateau, Western N Atlantic
Stratum typicum: Middle Oligocene
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Original description: [Stover, 1977, p. 73]:
Description:
Cysts are subspherical, however, their shape is commonly modified by folding.
Autophragm is thin, about 0.5 µm, and its outer surface is finely papillate, finely granulate or microreticulate with the ornamentation on individual specimens usually of a single type and uniformly distributed.
Archeopyle is apical, type A, and its principal suture is moderately angular; accessory sutures between precingular paraplates are rarely present. Operculum is free, large relative to cyst diameter, and its constituent paraplates are not differentiated on opercular surface.
Paratabulation expressed by archeopyle only; cysts lack indications of paracingulum and parasulcus.
Dimensions:
Overall size 28 to 42 µm.
Affinities:
Batiacasphaera micropapillata differs from B. hirsuta by having small papillae, granules or microreticulation on the autophragm rather than slender, hairlike projections. Most specimens of B. micropapillata are smaller than those of B. hirsuta.
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Notes:
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999
Batiacasphaera micropapillata Stover, 1977, can be finely papillate, finely granulate or microreticulate with the ornamentation on a single specimen of the same type. Head (1992) suggested that microreticulate forms of B.micropapillata be included in B. minuta.
Size: overall 28-42 µm.