Back
Trichodinium castanea
From Fensome et al., 2019:
Trichodinium castanea Deflandre, 1935, p.229, pl.6, fig.8 ex Clarke and Verdier, 1967, p.19–20.
Holotype: Deflandre, 1935, pl.6, fig.8; Deflandre, 1936b, pl.6, fig.1; Jan du Chêne et al., 1986a, pl.122, figs.9–10.
Originally Palaeoperidinium (name not validly published), subsequently (and now) Trichodinium.
Taxonomic senior synonyms: Apteodinium (as and now Trichodinium) ciliatum and Trichodinium intermedium, both by implication in Clarke and Verdier (1967, p.19), who believed Trichodinium castanea to be the senior name — however, subsequent workers have retained the three species (e.g. see Morgan, 1980, p.33; Harding, 1990b, p.38).
A full description of this species was given in Deflandre (1936b, p.177–178).
The name Palaeoperidinium castanea was not validly published in Deflandre (1935) since the generic name Palaeoperidinium was not validly published until 1967. NIA.
Age: ?Senonian (erratic).
---------------------------------------------------------------------------------------------------
Translation Deflandre 1935: LPP
Deflandre 1935, p. 229, PL.6, fig.8
Palaeoperidinium castanea
Diagnosis: The theca is spherical, sometimes spheroidal, slightly flattened or, on the contrary, a little ellipsoidal; it is divided in two equal parts by the transverse furrow, which is helicoidal and laevorotatory. The longitudinal furrow, which is perpendicular to it, is larger on the hypotheca than on the epitheca, but it seems to extend equally on both. At the apex, there is a bunch of strong, slightly divergent spines. The entire theca is covered with spines which, depending on the specimen, appear to be more or less dense. Generally, these spines are more numerous and stronger where the plate sutures would be located, and of which traces are found.
Dimensions: diameter generally about 45 µm, range 45-65 µm.
--------------------------------------------------
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Trichodinium castanea Deflandre, 1935 ex Clarke and Verdier, 1967. Trichodinium castanea has a spherical to ovoidal outline, small apical horn, can be as a bunch of spines, and numerous small, generally bifid spines, which are parasutural, particularly on the cingulum, and intratabular. Size: diameter 45-65 µm.
--------------------------------------------------
Trichodinium castanea Deflandre, 1935, p.229, pl.6, fig.8 ex Clarke and Verdier, 1967, p.19–20.
Holotype: Deflandre, 1935, pl.6, fig.8; Deflandre, 1936b, pl.6, fig.1; Jan du Chêne et al., 1986a, pl.122, figs.9–10.
Originally Palaeoperidinium (name not validly published), subsequently (and now) Trichodinium.
Taxonomic senior synonyms: Apteodinium (as and now Trichodinium) ciliatum and Trichodinium intermedium, both by implication in Clarke and Verdier (1967, p.19), who believed Trichodinium castanea to be the senior name — however, subsequent workers have retained the three species (e.g. see Morgan, 1980, p.33; Harding, 1990b, p.38).
A full description of this species was given in Deflandre (1936b, p.177–178).
The name Palaeoperidinium castanea was not validly published in Deflandre (1935) since the generic name Palaeoperidinium was not validly published until 1967. NIA.
Age: ?Senonian (erratic).
---------------------------------------------------------------------------------------------------
Translation Deflandre 1935: LPP
Deflandre 1935, p. 229, PL.6, fig.8
Palaeoperidinium castanea
Diagnosis: The theca is spherical, sometimes spheroidal, slightly flattened or, on the contrary, a little ellipsoidal; it is divided in two equal parts by the transverse furrow, which is helicoidal and laevorotatory. The longitudinal furrow, which is perpendicular to it, is larger on the hypotheca than on the epitheca, but it seems to extend equally on both. At the apex, there is a bunch of strong, slightly divergent spines. The entire theca is covered with spines which, depending on the specimen, appear to be more or less dense. Generally, these spines are more numerous and stronger where the plate sutures would be located, and of which traces are found.
Dimensions: diameter generally about 45 µm, range 45-65 µm.
--------------------------------------------------
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Trichodinium castanea Deflandre, 1935 ex Clarke and Verdier, 1967. Trichodinium castanea has a spherical to ovoidal outline, small apical horn, can be as a bunch of spines, and numerous small, generally bifid spines, which are parasutural, particularly on the cingulum, and intratabular. Size: diameter 45-65 µm.
--------------------------------------------------