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Valvaeodinium limbafibrosum
From Fensome et al., 2019:
Valvaeodinium limbafibrosum Below, 1987b, p.72–73, pl.20, figs.6–15.
Holotype: Below, 1987b, pl.20, figs.6–9; Fensome et al., 1993a, fig.1 — p.1251; figs.1–4 — p.1255.
Locus typicus: Unterst³rmig, Franconia, Germany
Stratum typicum: Spinatum Zone, Late Pliensbachian
Translation Below, 1987: Fensome et al., 1993, p.1252
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Original description: Below, 1987, p.72
Arrangement of vesicles/plates on the dinoflagellate amphiesma PR, 4", 1a, 5", 6c, 5""", 1"""", ns; growth of plates peridinioid.
Cyst form proximate, acavate, spheroidal or somewhat oblong ovaloidal, epicyst and hypocyst of equal size; size small; wall composed of pedium and microlanate to microfibrose luxuria growing out into a fur-like coat of delicate fibres on the broad limbi; the luxuria also forms usually numerous short intraareate appendages measuring about 1/4 to 1/5 of the cingular diameter of the cyst; these processes are solid and basally branched like mangrove roots in the microlanum, then fusing towards the distal end into a cylindrical trunk, and terminally abruptly divided in bifurcate, trifurcate, polyfurcate or cauliflorate fashion; areation discernible from the limbi between intraareate spaces with appendages; areation formula NR PR/PR, NR"/4", NRa/1a, 5", Xc, 5""", 1"""", Xs; apex undifferentiated or PR a minute, planate field; 4 apicals, steno omegaform-linteloid 1" (V), inverse-camerate 2" (LVL), VI 3" (DL), VI 4" (RVR); caroidal la (DR); 5 anteriorly geniculate precingulars, V-nE 1" (WL), V-nE 2" (LDL), V-nE 3" (D), V-nE 4" (RDR), VnE 5" (VR); cingulum planispiral, nonareate, but with the positions of 6 homologous thecal plates indicated by alternating wide and narrow distances between the cingular margins, lati 1c-5c, iso 6c; 5 posteriorly linear postcingulars, IV-nE 1""" (VL), IV-nE 2""" (LDL), IV-nE 3""" (D), IV-nE 4""" (RDR), IV-nE 5""" (VR) and polar VI 1""""; sulcus nonpartite with steno quasi-trapezoidal as and narrow, steno inverse-trapezoidal posterior sector; archeopyle apical/anterior intercalary, 3" + 1a; operculum solvate, secate, general opercular formula 3"[s] + 1a[s].
Size: Holotype: length 41 µm, breadth 41 µm, thickness 41 µm.
Valvaeodinium limbafibrosum Below, 1987b, p.72–73, pl.20, figs.6–15.
Holotype: Below, 1987b, pl.20, figs.6–9; Fensome et al., 1993a, fig.1 — p.1251; figs.1–4 — p.1255.
Locus typicus: Unterst³rmig, Franconia, Germany
Stratum typicum: Spinatum Zone, Late Pliensbachian
Translation Below, 1987: Fensome et al., 1993, p.1252
---------------------------------------------------------------------------------------------------
Original description: Below, 1987, p.72
Arrangement of vesicles/plates on the dinoflagellate amphiesma PR, 4", 1a, 5", 6c, 5""", 1"""", ns; growth of plates peridinioid.
Cyst form proximate, acavate, spheroidal or somewhat oblong ovaloidal, epicyst and hypocyst of equal size; size small; wall composed of pedium and microlanate to microfibrose luxuria growing out into a fur-like coat of delicate fibres on the broad limbi; the luxuria also forms usually numerous short intraareate appendages measuring about 1/4 to 1/5 of the cingular diameter of the cyst; these processes are solid and basally branched like mangrove roots in the microlanum, then fusing towards the distal end into a cylindrical trunk, and terminally abruptly divided in bifurcate, trifurcate, polyfurcate or cauliflorate fashion; areation discernible from the limbi between intraareate spaces with appendages; areation formula NR PR/PR, NR"/4", NRa/1a, 5", Xc, 5""", 1"""", Xs; apex undifferentiated or PR a minute, planate field; 4 apicals, steno omegaform-linteloid 1" (V), inverse-camerate 2" (LVL), VI 3" (DL), VI 4" (RVR); caroidal la (DR); 5 anteriorly geniculate precingulars, V-nE 1" (WL), V-nE 2" (LDL), V-nE 3" (D), V-nE 4" (RDR), VnE 5" (VR); cingulum planispiral, nonareate, but with the positions of 6 homologous thecal plates indicated by alternating wide and narrow distances between the cingular margins, lati 1c-5c, iso 6c; 5 posteriorly linear postcingulars, IV-nE 1""" (VL), IV-nE 2""" (LDL), IV-nE 3""" (D), IV-nE 4""" (RDR), IV-nE 5""" (VR) and polar VI 1""""; sulcus nonpartite with steno quasi-trapezoidal as and narrow, steno inverse-trapezoidal posterior sector; archeopyle apical/anterior intercalary, 3" + 1a; operculum solvate, secate, general opercular formula 3"[s] + 1a[s].
Size: Holotype: length 41 µm, breadth 41 µm, thickness 41 µm.