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Hystrichodinium parvum
Hystrichodinium? parvum Alberti 1961
Now Cauca. Originally Hystrichodinium, subsequently (and now) Cauca.
Holotype: Alberti, 1961, pl.9, fig.4
Locus typicus: Hildesheim, Germany
Strathm typicum: Early Aptian-Albian
Translation Alberti, 1961: LPP
Original diagnosis: Alberti, 1961, p. 16
Outline of shell rounded to oval, flattened. Epitheca more conical than the always larger, at the antapex clearly rounded hypotheca. Transverse furrow ¦ indented. The surface of the shell covered by a delicate membrane, developing from ¦ long marginal prosesses.
Shell divided by transverse furrow into two unequal halfs, hypotheca max. two times larger than epitheca. Length ratio hypotheca : epitheca 1.3 - 1.5 : 1. Processes, connected by basal sutures or arising from those, pointed at the distel ends. Membrane of shell yellowish to brown.
Dimensions: Holotype: length of epitheca 9 Ám, hypotheca 16 Ám, breadth of transverse furrow c. 3 Ám, breadth of shell 30 Ám. Length of processes 16-22 Ám.
Now Cauca. Originally Hystrichodinium, subsequently (and now) Cauca.
Holotype: Alberti, 1961, pl.9, fig.4
Locus typicus: Hildesheim, Germany
Strathm typicum: Early Aptian-Albian
Translation Alberti, 1961: LPP
Original diagnosis: Alberti, 1961, p. 16
Outline of shell rounded to oval, flattened. Epitheca more conical than the always larger, at the antapex clearly rounded hypotheca. Transverse furrow ¦ indented. The surface of the shell covered by a delicate membrane, developing from ¦ long marginal prosesses.
Shell divided by transverse furrow into two unequal halfs, hypotheca max. two times larger than epitheca. Length ratio hypotheca : epitheca 1.3 - 1.5 : 1. Processes, connected by basal sutures or arising from those, pointed at the distel ends. Membrane of shell yellowish to brown.
Dimensions: Holotype: length of epitheca 9 Ám, hypotheca 16 Ám, breadth of transverse furrow c. 3 Ám, breadth of shell 30 Ám. Length of processes 16-22 Ám.