Back
Rhombodella paucispina
Rhombodella paucispina (Alberti 1961) Duxbury 1980
Originally Palaeohystrichophora, subsequently Palaeotetradinium, thirdly (and
now) Rhombodella.
Tax. sr. synonym of Rhombodella natans Cookson and Eisenack, 1962, according to Stover and Evitt, 1978. Rhombodella paucispina therefore becomes the correct name for the type species of Rhombodella, but the nomenclatural type of the
genus remains the holotype of Rhombodella natans. Stover and Evitt, 1978 transferred this species to Palaeotetradinium Deflandre, 1936; however, Lentin and Williams, 1981 retained it in Rhombodella.
Holotype: Alberti, 1961, pl.3, fig.25
Locus typicus: Haverlahwiese, Salzgitter, Germany
Stratum typicum: Albian
Translation Alberti, 1961: LPP
Original diagnosis: Alberti, 1961, p. 19: Palaeohystrichophora paucispina
Shell flattened, elongate biconical. Apex and antapex slightly blunted. Epi- and hypotheca of nearly equal size. Girdle as well as longitudinal furrow indicated by parallel, interrupted lines. The longitudinal furrow extends from the mid-epitheca to the antapex. Cyst with few, short, solid, slightly curved thorns, which appear at the poles and the flanks of the body in hight of the girdle. Torns 4-5 µm long. No inner body has been observed.
Affinities:
Alberti, 1961, p.20: Palaeohystrichophora paucispina
P. paucispina differs from all other species in having short, solid thorns.
Originally Palaeohystrichophora, subsequently Palaeotetradinium, thirdly (and
now) Rhombodella.
Tax. sr. synonym of Rhombodella natans Cookson and Eisenack, 1962, according to Stover and Evitt, 1978. Rhombodella paucispina therefore becomes the correct name for the type species of Rhombodella, but the nomenclatural type of the
genus remains the holotype of Rhombodella natans. Stover and Evitt, 1978 transferred this species to Palaeotetradinium Deflandre, 1936; however, Lentin and Williams, 1981 retained it in Rhombodella.
Holotype: Alberti, 1961, pl.3, fig.25
Locus typicus: Haverlahwiese, Salzgitter, Germany
Stratum typicum: Albian
Translation Alberti, 1961: LPP
Original diagnosis: Alberti, 1961, p. 19: Palaeohystrichophora paucispina
Shell flattened, elongate biconical. Apex and antapex slightly blunted. Epi- and hypotheca of nearly equal size. Girdle as well as longitudinal furrow indicated by parallel, interrupted lines. The longitudinal furrow extends from the mid-epitheca to the antapex. Cyst with few, short, solid, slightly curved thorns, which appear at the poles and the flanks of the body in hight of the girdle. Torns 4-5 µm long. No inner body has been observed.
Affinities:
Alberti, 1961, p.20: Palaeohystrichophora paucispina
P. paucispina differs from all other species in having short, solid thorns.