Aldorfia vectensis DUXBURY 1983

Holotype
Pl. 4, fig(s). 3, 7, 10
NHM registration number: FD56(2)
 

Transmitted light images:

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Optical section
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Dorsal face
 

Original diagnosis:

"A holocavate, gonyaulacacean dinoflagellate cyst species. The autocyst is spheroidal to ovoidal with a distinct, distally closed, apical projection. The ectophragm, which is finely punctate, is clearly separate from the autophragm and the resultant ectocoel is particularly pronounced at the apex, the antapex and in the paracingular area. A distinct, distally closed apical horn is always present which mirrors the apical projection of the autocyst. Narrow muri constituting a crude reticulum are present between the auto- and ectocyst. The paracingulum is laevorotatory, is indicated by two parallel, low ridges with a depression between and is almost totally devoid of reticulation. The parasulcus is clearly defined by a distinct ventral depression. Paratabulation is faintly marked on the ectophragm surface by low ridges and the archeopyle is formed by detachment of paraplate 3''." - From Duxbury (1983, p. 39).

Note:

This species has later been transferred to the genus Apteodinium Eisenack 1958a. Now: Apteodinium vectense (Duxbury 1983) Lucas-Clark 1987.

(See Williams et al., 1998).