From Williams et al., 2017:

[Hoegklintia, Dorning, 1981, p. 192; Emendation: Eiserhardt, 1992, p. 41.
Acritarch genus.

Type species: as Baltisphaeridium visbyense, Eisenack, 1959 (pl.16, fig.12)]

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Original description: [Dorning, 1981, p. 192]:

Genus Hogklintia n. gen.

Type species: Hogklintia visbyense n. comb. (Basionym : Baltisphaeridium visbyense Eisenack 1959, Palaeontographica, A, 112:200, pl.16, 12-14);
Wenlock, Högklint Beds, Högklint, Gotland.

Diagnosis: Vesicle subspherical to subpolygonal in outline, large, ill defined from processes, wall thin, laevigate; three to several processes, thin walled, broad ill defined base, distally branched, bifurcate to multifurcate in one to three orders; the distal termination is sharp to somewhat blunt, often with some darkening of the process wall at the tip.

Remarks: Multiplicisphaeridium is generally smaller and has a thicker wall; Estiastra (= Goniosphaeridium ) has simple processes; Pulvinosphaeridium has very blunt process terminations. Hogklintia together with Estiastra and Pulvinosphaeridium are a conspicuous group of large acritarchs; all are probably cysts of thallose macroalgae, which may have been benthonic. These genera appear to be more common in calcareous sediments; their stratigraphic value appears to be limited to correlation within a sedimentary basin.
The following species have the characteristics of Hogklintia, and are transferred: Hogklintia ancyrea n. comb. (Basionym: Baltisphaeridium
ancyreum Cramer et Dfez 1972, Palaeontographica, B, 138:147--148); Hogklintia cylindrica n. comb. (Basionym: Baltisphaeridium cylindricum
Cramer 1970, Rev. Esp. Micropaleontol., Nfim. Extraord., 1:17 9-180); Hogklintia digitata n. comb. (Basionym: Hystrichosphaeridium digitatum
Eisenack 1938, Z. Geschiebeforsch., 14:20).