Back
Scriniodinium pharo
From Fensome et al., 2019:
Scriniodinium pharo (Duxbury, 1977, p.32, pl.9, fig.5; text-fig.8) Davey, 1982b, p.31. Holotype: Duxbury, 1977, pl.9, fig.5; Jan du Chêne et al., 1986a, pl.111, figs.11–12. Originally Endoscrinium, subsequently (and now) Scriniodinium. Jan du Chêne et al. (1986a, p.316) and Woollam and Riding (1983, p.7) also proposed this combination. NIA. Age: late Berriasian–early Valanginian.
---------------------------------------------------------------------------------------------------
Locus typicus: Speeton Clay, Speeton, England.
Stratum typicum: Valanginian
Original diagnosis: Duxbury, 1977, p. 32: Endoscrinium pharo
A thin-walled, fairly large, cavate cyst. Periblast smooth to finely granular and apically produced into a characteristically long, distally open horn which tapers towards the apex. Endoblast smooth, ovoidal, longer than broad and with a prominent, bluntly-rounded apical prominence. A faint tabulation is outlined on the periphragm by narrow, low, smooth ridges. Tabulation ?4', 6", 5''', ?1pv, ?''''. Archeopyle precingular, formed by loss of plate 3". Sometimes an additional opening occurs in the periphragm, possibly corresponding to 1 pv.
Observed Dimensions: Holotype 119 x 70 µm. Overall 141(121)90 x 78(70)57 µm.
Affinities: Duxbury, 1977, p. 32: Endoscrinium pharo
In possessing a distinct apical horn and in the general shape of the test other than the apical horn, Endoscrinium pharo resembles Endoscrinium campanula (Gocht) Vozzhennikova. The main difference between the two is the degree of development of the apical horn. That of E. pharo is always very well-developed (usually about 40 microns long) as opposed to the short horn of E. campanula. The difference in horn length between these two species results in a considerable difference in the average overall length of the test.
Scriniodinium pharo (Duxbury, 1977, p.32, pl.9, fig.5; text-fig.8) Davey, 1982b, p.31. Holotype: Duxbury, 1977, pl.9, fig.5; Jan du Chêne et al., 1986a, pl.111, figs.11–12. Originally Endoscrinium, subsequently (and now) Scriniodinium. Jan du Chêne et al. (1986a, p.316) and Woollam and Riding (1983, p.7) also proposed this combination. NIA. Age: late Berriasian–early Valanginian.
---------------------------------------------------------------------------------------------------
Locus typicus: Speeton Clay, Speeton, England.
Stratum typicum: Valanginian
Original diagnosis: Duxbury, 1977, p. 32: Endoscrinium pharo
A thin-walled, fairly large, cavate cyst. Periblast smooth to finely granular and apically produced into a characteristically long, distally open horn which tapers towards the apex. Endoblast smooth, ovoidal, longer than broad and with a prominent, bluntly-rounded apical prominence. A faint tabulation is outlined on the periphragm by narrow, low, smooth ridges. Tabulation ?4', 6", 5''', ?1pv, ?''''. Archeopyle precingular, formed by loss of plate 3". Sometimes an additional opening occurs in the periphragm, possibly corresponding to 1 pv.
Observed Dimensions: Holotype 119 x 70 µm. Overall 141(121)90 x 78(70)57 µm.
Affinities: Duxbury, 1977, p. 32: Endoscrinium pharo
In possessing a distinct apical horn and in the general shape of the test other than the apical horn, Endoscrinium pharo resembles Endoscrinium campanula (Gocht) Vozzhennikova. The main difference between the two is the degree of development of the apical horn. That of E. pharo is always very well-developed (usually about 40 microns long) as opposed to the short horn of E. campanula. The difference in horn length between these two species results in a considerable difference in the average overall length of the test.