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Chlamydophorella membranoidea
Chlamydophorella? membranoidea, Vozzhennikova, 1967
Now Lagenadinium?. Originally Chlamydophorella, subsequently Clamydophorella?, thirdly (and now) Lagenadinium?.
Stover and Evitt, 1978, considered this to be a provisionally accepted species of Chlamydophorella.
Lentin and Vozzhennikova, 1990, provided an emended description for this species, as Lagenadinium membranoideum.
Taxonomic junior synonym: Stephanelytron cretaceum, according to Heilmann-Clausen in Heilmann-Clausen and Thomsen (1995, p.301) - however, Courtinat (1999, p.178) retained Stephanelytron cretaceum.
Holotype: Vozzhennikova, 1967, pl.48, figs.9a-b; Lentin and Vozzhennikova, 1990, text-fig.58 (lost according to Lentin and Vozzhennikova, 1990)
Lectotype: ?Vozzhennikova, 1967, pl.48, fig.6; Lentin and Vozzhennikova, 1990, pl.10, figs.6-7 (designated by Lentin and Vozzhennikova, 1990)
Locus typicus: Moscow region, Russia
Stratum typicum: Late Jurassic
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Original description: [Vozzhennikova, 1967, p. 114-115]: (Translation: Lees in Sarjeant (Ed.), 1971, p. 177):
Diagnosis:
Theca with an oval-polygonal outline, densely covered with short processes which bifurcate at the distal end and which fuse together near the bifurcations thus forming a second polygonal, wavy membrane to the theca. It appears as though the outgrowths are supporting this membrane, The fields, transverse furrow and pylome (of oval or triangular shape) are all bounded by rows of outgrowths the bifurcating ends of which join together. Over the rest of the theca the outgrowths are arranged regularly. The number of fields has not been determined.
Dimensions:
Holotype - length of theca with outgrowths 45.9 µm, breadth 43.2 µm, length of outgrowths 5.4 µm. In other specimens the dimensions of theca with outgrowths are: length 39.3-54.3 µm, breadth 36.5-48.6 µm, length of outgrowths 5.4 µm.
Affinities:
C. membranoidea differs from other species of the genus in having an oval- polygonal outline to the theca, in the absence of any apical processes and the presence of fields and a transverse furrow.
Now Lagenadinium?. Originally Chlamydophorella, subsequently Clamydophorella?, thirdly (and now) Lagenadinium?.
Stover and Evitt, 1978, considered this to be a provisionally accepted species of Chlamydophorella.
Lentin and Vozzhennikova, 1990, provided an emended description for this species, as Lagenadinium membranoideum.
Taxonomic junior synonym: Stephanelytron cretaceum, according to Heilmann-Clausen in Heilmann-Clausen and Thomsen (1995, p.301) - however, Courtinat (1999, p.178) retained Stephanelytron cretaceum.
Holotype: Vozzhennikova, 1967, pl.48, figs.9a-b; Lentin and Vozzhennikova, 1990, text-fig.58 (lost according to Lentin and Vozzhennikova, 1990)
Lectotype: ?Vozzhennikova, 1967, pl.48, fig.6; Lentin and Vozzhennikova, 1990, pl.10, figs.6-7 (designated by Lentin and Vozzhennikova, 1990)
Locus typicus: Moscow region, Russia
Stratum typicum: Late Jurassic
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Original description: [Vozzhennikova, 1967, p. 114-115]: (Translation: Lees in Sarjeant (Ed.), 1971, p. 177):
Diagnosis:
Theca with an oval-polygonal outline, densely covered with short processes which bifurcate at the distal end and which fuse together near the bifurcations thus forming a second polygonal, wavy membrane to the theca. It appears as though the outgrowths are supporting this membrane, The fields, transverse furrow and pylome (of oval or triangular shape) are all bounded by rows of outgrowths the bifurcating ends of which join together. Over the rest of the theca the outgrowths are arranged regularly. The number of fields has not been determined.
Dimensions:
Holotype - length of theca with outgrowths 45.9 µm, breadth 43.2 µm, length of outgrowths 5.4 µm. In other specimens the dimensions of theca with outgrowths are: length 39.3-54.3 µm, breadth 36.5-48.6 µm, length of outgrowths 5.4 µm.
Affinities:
C. membranoidea differs from other species of the genus in having an oval- polygonal outline to the theca, in the absence of any apical processes and the presence of fields and a transverse furrow.