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Lanterna sportula
From Fensome et al., 2019:
Lanterna sportula Dodekova, 1969, p.18–19, pl.3, figs.4,7,10–11; text-fig.Dc. Holotype: Dodekova, 1969, pl.3, figs.4,7. Age: Tithonian.
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Original description (Dodekova, 1969) Not yet translated from French
Type. Holotype-Jmp/DO - 23, Paratype-Jmp/DO - 21, Tithoniki, village Dolen Dabnik, survey R1 - 2560 m. The name of the species comes from the reticular surface which is formed by fused distal ramifications of the appendages. In Latin: "sportula" - woven basket.
M at e r i e l. 16 specimens.
Dimensions (in µ):
Body length. Holotype: 74, Paratype: 60
Body width. Holotype: 71, Paratype: 55
Appendage length. Holotype: 12, Paratype: 8
Description. The body is spherical or ellipsoidal. The transverse groove is levorotatory. The tabulation is difficult to establish, but the pattern 4'?, 6", 6 s.t., 6"', 1p, 1 ppl, 1"" can be accepted as probable.
The appendages covering the plates are well developed, long, with some ramifications at the distal end. The neighboring ramifications fuse and form a fine, lace-like filament, which surrounds the body in a woven basket. The appendages and filament are more developed on the hypothec. There is no fixed rule for the dimensions and arrangement of the filament holes. The structure of the transverse groove is close to that of Lanterna bulgarica. In this species, due to the more developed ornamentation, the row of appendages in the middle of the groove is wider and more branched. The sutures between the plates represent bands without appendages, slightly punctuated. The archaeopyle is apical.
Relationship and differences. Laterna sportula differs from L. bulgarica and L. spinosa in its highly developed appendages, branched at the distal ends, and in the filament formed by intermingled branches of the appendages.
Remarks. The three new species—Laterna spinosa, L. bulgarica, and L. sportula—constitute part of a morphological line that demonstrates the progressive complication of membrane ornamentation. This complication is evidently related to its planktonic existence and the need to develop a larger cell surface area for extensive contact with the aquatic environment.
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G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999
Lanterna sportula Dodekova, 1969. The processes which cover the test are well developed, long with some ramifications distally. Neighbouring processes are connected and form a fine net, best developed on the hypocyst. Size: body length 60-74 µm, width 55-71 µm, process length 8-12 µm.
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Lanterna sportula Dodekova, 1969, p.18–19, pl.3, figs.4,7,10–11; text-fig.Dc. Holotype: Dodekova, 1969, pl.3, figs.4,7. Age: Tithonian.
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Original description (Dodekova, 1969) Not yet translated from French
Type. Holotype-Jmp/DO - 23, Paratype-Jmp/DO - 21, Tithoniki, village Dolen Dabnik, survey R1 - 2560 m. The name of the species comes from the reticular surface which is formed by fused distal ramifications of the appendages. In Latin: "sportula" - woven basket.
M at e r i e l. 16 specimens.
Dimensions (in µ):
Body length. Holotype: 74, Paratype: 60
Body width. Holotype: 71, Paratype: 55
Appendage length. Holotype: 12, Paratype: 8
Description. The body is spherical or ellipsoidal. The transverse groove is levorotatory. The tabulation is difficult to establish, but the pattern 4'?, 6", 6 s.t., 6"', 1p, 1 ppl, 1"" can be accepted as probable.
The appendages covering the plates are well developed, long, with some ramifications at the distal end. The neighboring ramifications fuse and form a fine, lace-like filament, which surrounds the body in a woven basket. The appendages and filament are more developed on the hypothec. There is no fixed rule for the dimensions and arrangement of the filament holes. The structure of the transverse groove is close to that of Lanterna bulgarica. In this species, due to the more developed ornamentation, the row of appendages in the middle of the groove is wider and more branched. The sutures between the plates represent bands without appendages, slightly punctuated. The archaeopyle is apical.
Relationship and differences. Laterna sportula differs from L. bulgarica and L. spinosa in its highly developed appendages, branched at the distal ends, and in the filament formed by intermingled branches of the appendages.
Remarks. The three new species—Laterna spinosa, L. bulgarica, and L. sportula—constitute part of a morphological line that demonstrates the progressive complication of membrane ornamentation. This complication is evidently related to its planktonic existence and the need to develop a larger cell surface area for extensive contact with the aquatic environment.
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G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999
Lanterna sportula Dodekova, 1969. The processes which cover the test are well developed, long with some ramifications distally. Neighbouring processes are connected and form a fine net, best developed on the hypocyst. Size: body length 60-74 µm, width 55-71 µm, process length 8-12 µm.
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