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Paranetrelytron strongylum
Paranetrelytron strongylum Sarjeant, 1966c, p.201–202, pl.21, fig.5; pl.23, fig.5; text-fig.52.
Originally Paranetrelytron, subsequently Pareodinia.
Taxonomic senior synonym: Pareodinia ceratophora, according to Wiggins (1975, p.103) and Kunz (1990, p.13). For etymology, see Pareodina strongyla.
Holotype: Sarjeant, 1966, pl.21, fig.5; pl.23, fig.5
Locus typicus: Speeton Clay, West Heslerton, England
Stratum typicum: Early Barremian
Original diagnosis: Sarjeant, 1966, p. 201
A Paranetrelyton having a spheroidal outer body tapering smoothly to form short, blunt apical horn. Inner body spheroidal and relatively large, thin-walled and often hard to distinguish. A poorly-marked cingulum sometimes present. Endophragm and periphragm smooth or only very minutely granular.
Dimensions: Holotype: overall length 56 µm, breadth 45 µm, length of apical horn 10 µm; length of inner body ca.40 µm, breadth ca.40 µm. Range of dimensions: overall lengths 51-58 µm.
Original descriptoin: Sarjeant, 1966, p. 202
The holotype is enclosed in a roughly oval cloak of debris; in the three other specimens observed to date, the debris cloak was comparable. The enclosing body is roughly lemon-shaped. The inner body fits quite closely, except at the apical end where there is a quite large expansion of the pericoel. It is thin and transparent and, as a result, very hard to distinguish; its presence was confirmed only under phase contrast. The debris cloak of the holotype contains a ball-like mass of debris immediately posterior to the antapex. This structure is of doubtful significance and may simply represent fortuitous adherence of organic debris from a quite unrelated source. An archaeopyle has not been observed to date.
Originally Paranetrelytron, subsequently Pareodinia.
Taxonomic senior synonym: Pareodinia ceratophora, according to Wiggins (1975, p.103) and Kunz (1990, p.13). For etymology, see Pareodina strongyla.
Holotype: Sarjeant, 1966, pl.21, fig.5; pl.23, fig.5
Locus typicus: Speeton Clay, West Heslerton, England
Stratum typicum: Early Barremian
Original diagnosis: Sarjeant, 1966, p. 201
A Paranetrelyton having a spheroidal outer body tapering smoothly to form short, blunt apical horn. Inner body spheroidal and relatively large, thin-walled and often hard to distinguish. A poorly-marked cingulum sometimes present. Endophragm and periphragm smooth or only very minutely granular.
Dimensions: Holotype: overall length 56 µm, breadth 45 µm, length of apical horn 10 µm; length of inner body ca.40 µm, breadth ca.40 µm. Range of dimensions: overall lengths 51-58 µm.
Original descriptoin: Sarjeant, 1966, p. 202
The holotype is enclosed in a roughly oval cloak of debris; in the three other specimens observed to date, the debris cloak was comparable. The enclosing body is roughly lemon-shaped. The inner body fits quite closely, except at the apical end where there is a quite large expansion of the pericoel. It is thin and transparent and, as a result, very hard to distinguish; its presence was confirmed only under phase contrast. The debris cloak of the holotype contains a ball-like mass of debris immediately posterior to the antapex. This structure is of doubtful significance and may simply represent fortuitous adherence of organic debris from a quite unrelated source. An archaeopyle has not been observed to date.