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Leberidocysta flagellichnia
Leberidocysta? flagellichnia Schioler, 1993
Questionable assignment: Schiøler (1993, p.110).
Schiøler et al. (1997, p.87) considered this species to be the possible taxonomic senior synonym of Leberidocysta microverrucosa.
Holotype: Schioler, 1993, pl.3, figs.7-8, text-fig.5
Paratype: Schioler, 1993
Locus typicus: Well M-9X, Dan Field, Danish North Sea
Stratum typicum: Maastrichtian to Early Danian
Original diagnosis: Schioler, 1993, p.110
A small holocavate oval cyst with a narrow pericoel. The periphragm is smooth, and occasionally has folds which indicate parts of the paratabulation. The endophragm is granulate and has a small, kidney-shaped scar in the sulcal area. The archaeopyle is apical and the opercula are usually attached.
Original description: Schioler, 1993, p.110
Oval holocavate cyst. The periphragm is thin and smooth, and is separated from the endophragm by a narrow (1-3 Ám) pericoel (Pl. 3, figs 8, 10, 13). The endophragm is relatively thick-walled and granulate to vermiculate. A conspicuous kidney-shaped ornament with low relief is always present ventrally on the endophragm beneath the point of operculum attachment (Pl. 3, figs 7,9,12,13,14, Text-fig 5). Archaeopyle apical (tA). The periand endoperculum usually are attached. The paracingulum is occasionally indicated by folds in the periphragm (Pl. 3, figs 11, 12). The position of the parasulcus is indicated by a kidney-shaped ornament on the endophragm, and sometimes by a longitudinal fold in the periphragm (Pl.3, fig. 12). The larger adcingular paraplates occasionally are indicated by folds in the periphragm (Pl. 3, fig. 12). The paratabulation occurs inconsistently and has not been determined.
Dimensions:holotyperange
length of pericyst35 Ám28(35)41 Ám
width of pericyst36 Ám32(36)41 Ám
length of endocyst32 Ám27(32)36 Ám
width of endocyst33 Ám30(33)38 Ám
Specimens measured. 12
Schioler, 1993, p.110-111: Form X spp. 1 and 2 of Marheinecke (1992, p. 121,
pl. 27, figs 11-13, 7-9) closely resemble the new species in general appearance and size; Form X sp. 2 apparently only differs from Leberidocysta? flagellichnia in having a larger antapical pericoel, and may be conspecific with the new species. Form X sp. 1 differs further in having an alveolate endophragm. "Hexagonifera verrucosa" of Wilson (1974) differs from Leberidocysta? flagellichnia sp. nov. in having a verrucate endophragm (and thereby resembling Form X sp. 1 of Marheinecke, 1992). The kidney-shaped sulcal ornament is interpreted as representing the relict of the flagella insertion point by the present author. It is with some hesitation that the new species is located in genus Leberidocysta as this genus is not thought to have attached opercula (Stover and Evitt, 1978 p. 60). However, the illustration of the type specimen of the genus, L. chlamydata, shows peri- and endoperculum in place (Cookson and Eisenack, 1962, Pl. 7, fig. 2). This fact is considered here to justify the generic location of the new species in Leberidocysta.
Questionable assignment: Schiøler (1993, p.110).
Schiøler et al. (1997, p.87) considered this species to be the possible taxonomic senior synonym of Leberidocysta microverrucosa.
Holotype: Schioler, 1993, pl.3, figs.7-8, text-fig.5
Paratype: Schioler, 1993
Locus typicus: Well M-9X, Dan Field, Danish North Sea
Stratum typicum: Maastrichtian to Early Danian
Original diagnosis: Schioler, 1993, p.110
A small holocavate oval cyst with a narrow pericoel. The periphragm is smooth, and occasionally has folds which indicate parts of the paratabulation. The endophragm is granulate and has a small, kidney-shaped scar in the sulcal area. The archaeopyle is apical and the opercula are usually attached.
Original description: Schioler, 1993, p.110
Oval holocavate cyst. The periphragm is thin and smooth, and is separated from the endophragm by a narrow (1-3 Ám) pericoel (Pl. 3, figs 8, 10, 13). The endophragm is relatively thick-walled and granulate to vermiculate. A conspicuous kidney-shaped ornament with low relief is always present ventrally on the endophragm beneath the point of operculum attachment (Pl. 3, figs 7,9,12,13,14, Text-fig 5). Archaeopyle apical (tA). The periand endoperculum usually are attached. The paracingulum is occasionally indicated by folds in the periphragm (Pl. 3, figs 11, 12). The position of the parasulcus is indicated by a kidney-shaped ornament on the endophragm, and sometimes by a longitudinal fold in the periphragm (Pl.3, fig. 12). The larger adcingular paraplates occasionally are indicated by folds in the periphragm (Pl. 3, fig. 12). The paratabulation occurs inconsistently and has not been determined.
Dimensions:holotyperange
length of pericyst35 Ám28(35)41 Ám
width of pericyst36 Ám32(36)41 Ám
length of endocyst32 Ám27(32)36 Ám
width of endocyst33 Ám30(33)38 Ám
Specimens measured. 12
Schioler, 1993, p.110-111: Form X spp. 1 and 2 of Marheinecke (1992, p. 121,
pl. 27, figs 11-13, 7-9) closely resemble the new species in general appearance and size; Form X sp. 2 apparently only differs from Leberidocysta? flagellichnia in having a larger antapical pericoel, and may be conspecific with the new species. Form X sp. 1 differs further in having an alveolate endophragm. "Hexagonifera verrucosa" of Wilson (1974) differs from Leberidocysta? flagellichnia sp. nov. in having a verrucate endophragm (and thereby resembling Form X sp. 1 of Marheinecke, 1992). The kidney-shaped sulcal ornament is interpreted as representing the relict of the flagella insertion point by the present author. It is with some hesitation that the new species is located in genus Leberidocysta as this genus is not thought to have attached opercula (Stover and Evitt, 1978 p. 60). However, the illustration of the type specimen of the genus, L. chlamydata, shows peri- and endoperculum in place (Cookson and Eisenack, 1962, Pl. 7, fig. 2). This fact is considered here to justify the generic location of the new species in Leberidocysta.