Cleistosphaeridium pectiniforme, (Gerlach, 1961), Davey et al. 1969

Now Areosphaeridium?. Originally Baltisphaeridium, subsequently Cleistosphaeridium, thirdly (and now) Areosphaeridium?.
Tax. sr. synonym of Areosphaeridium multicornutum Eaton, 1971, according to Sarjeant, 1984.
This combination was not validly published in Davey et al., 1966, since these authors did not fully reference the basionym.

Holotype: Gerlach, 1961, pl.28, fig.14; Sarjeant, 1984, pl.1, fig.2; pl.4, fig.2
Locus typicus: Well Emsbüren, NW Germany
Stratum typicum: Oligocene

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Original description as Baltisphaeridium pectiniforme: [Gerlach, 1961, p. 195-196]: (Translation: LPP):

Diagnosis:
A species of the genus Baltisphaeridium with slender, solid processes, which extend widely and are set with numerous small hooks. Shell circular to oval. Membrane granulate.

Description:
The outline of the theca changes between circular and oval. The processes are massive, slender and extend to both sides. The rims of these side-branches are set with small hooks, so that the processes show a similarity with a rake. The membrane is delicate, hyaline and finely granulate.

Dimensions:
holotype: 32 (13) µm; paratypes: 42 (21) µm.