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Algidasphaeridium capillatum
Algidasphaeridium capillatum, Matsuoka and Bujak, 1988
Holotype: Matsuoka and Bujak, 1988, pl.2, fig.5
Paratypes: Matsuoka and Bujak, 1988
Locus typicus: Navarin Basin Cost No. 1 well, central Bering Sea
Stratum typicum: Hystrichosphaeropsis variabile Zone, Late Miocene
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Original description: [Matsuoka and Bujak, 1988, p. 36]:
Diagnosis:
Small spherical cysts composed of two layers closely adpressed except at the spines. Cyst wall non-pigmented; periphragm thin and granular. Numerous nontabular spines short, solid, flexuous and sometimes distally capitate and closed. No features reflecting paratabulation.
Archeopyle chasmic and approximately one-fifth of the cyst diameter.
Description:
The small proximate cyst is spherical and covered with numerous hair-like processes. These process are nontabular, flexuous, closed at the proximal and distal ends, and simple or sometimes capitate distally.
Paratabular features are absent.
The archeopyle is chasmic and formed by a split of about one-fifth of the cyst diameter.
Dimensions:
Holotype; cyst diameter 32 µm, length of processes 3 µm.
Range; Cyst diameter 27-34 µm, length of processes 3-4 µm.
Number of specimen measured; 5.
Affinities:
Thecal affinities: Probably Gymnodiniaceae. The chasmic archeopyle has been observed in modern cysts of Pheopolykrikos hartmannii (Matsuoka and Fukuyo, 1986), Cochlodinium sp. (Matsuoka, 1985) and Gymnodinium catenatum.
(p. 37): Algidasphaeridium capillatum is similar to A. ? minuta and to Dinoflagellate cyst D of Reid and Harland 1977 in having numerous, solid and flexuous processes. It differs from A. ? minutum in its smaller cyst diameter and chasmic archeopyle, and from Dinoflagellate cyst D in not having capitate process terminations.
Holotype: Matsuoka and Bujak, 1988, pl.2, fig.5
Paratypes: Matsuoka and Bujak, 1988
Locus typicus: Navarin Basin Cost No. 1 well, central Bering Sea
Stratum typicum: Hystrichosphaeropsis variabile Zone, Late Miocene
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Original description: [Matsuoka and Bujak, 1988, p. 36]:
Diagnosis:
Small spherical cysts composed of two layers closely adpressed except at the spines. Cyst wall non-pigmented; periphragm thin and granular. Numerous nontabular spines short, solid, flexuous and sometimes distally capitate and closed. No features reflecting paratabulation.
Archeopyle chasmic and approximately one-fifth of the cyst diameter.
Description:
The small proximate cyst is spherical and covered with numerous hair-like processes. These process are nontabular, flexuous, closed at the proximal and distal ends, and simple or sometimes capitate distally.
Paratabular features are absent.
The archeopyle is chasmic and formed by a split of about one-fifth of the cyst diameter.
Dimensions:
Holotype; cyst diameter 32 µm, length of processes 3 µm.
Range; Cyst diameter 27-34 µm, length of processes 3-4 µm.
Number of specimen measured; 5.
Affinities:
Thecal affinities: Probably Gymnodiniaceae. The chasmic archeopyle has been observed in modern cysts of Pheopolykrikos hartmannii (Matsuoka and Fukuyo, 1986), Cochlodinium sp. (Matsuoka, 1985) and Gymnodinium catenatum.
(p. 37): Algidasphaeridium capillatum is similar to A. ? minuta and to Dinoflagellate cyst D of Reid and Harland 1977 in having numerous, solid and flexuous processes. It differs from A. ? minutum in its smaller cyst diameter and chasmic archeopyle, and from Dinoflagellate cyst D in not having capitate process terminations.