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Muderongia tabulata
Muderongia tabulata (Raynaud, 1978) Monteil, 1991; Emendation: Monteil, 1991b, p.476, as Muderongia tabulata.
NOW Phoberocysta. Originally (and now) Phoberocysta, subsequently Muderongia. Poulsen 1996 retained Phoberocysta.
Tax. sr. synonym of Phoberocysta neocomica sbsp. convexa (Gocht, 1957) Lentin and Williams, 1973, according to Monteil, 1991. Phoberocysta tabulata is the tax. sr. synonym at the species rank.
Tax. sr. synonym of Phoberocysta neocomica ssp. pteridia (Gocht, 1957) Lentin and Williams, 1973, according to Monteil, 1991. Phoberocysta tabulata is the tax. sr. synonym at the species rank.
Tax. sr. synonym of Phoberocysta neocomica ssp. subovalis (Gocht, 1957) Lentin and Williams, 1973, according to Monteil, 1991. Phoberocysta tabulata is the tax. sr. synonym at the species rank.
Holotype: Raynaud, 1978, pl.1, fig.1
Locus typicus: N Europe
Stratum typicum: Berriasian-Valanginian
Supplemental diagnosis: Monteil, 1991, p. 476
Cysts proximate to proximochorate, compressed dorsoventrally, two-layered, cornucavate to delphicavate or circumcavate. Pericyst ceratioid, asymmetrical, with 5 prominent horns: 1 apical (axial, type AP l); 2 subequal lateral (axial, type L 1), indented; 2 inequal antapical (joined, type ATP ll). Left lateral horn may be slightly more reduced than the right one. Left antapical horn longer (up to one and one-half times) than the right one, expressed by a rounded bulge. Horns normal to tapered with distal extremities closed and rounded to pointed; proximal extremities narrow to wide. Endocyst oval to rhombic, sometimes with eccentric antapex extending in the left antapical horn. Periphragm thin, psilate to scabrate; periphragm may be ornamented by verrucae, spines or processes (stages I to IV). Spines usually densely distributed on the distal half of the horns, with decreasing density towards the central body. Endophragm thin, psilate to granulate. Archeopyle apical, type (4A), with angular margin. Parasulcal notch marked. Operculum free. Paratabulation indicated by archeopyle, by low parasutural ridges or septa, and more or less clearly expressed by distribution and type of processes (stages I to IV), when those are present. Occasionally, periphragm showing penitabular verrucae. Formula: ?pr, 4", 0a, 6", 6c, 6""", 1p, 1"""", 3s (with rs, Is and ps fused), fm. Pericingulum marked by indentation of lateral horns and by parallel transverse structures. Perisulcus sinuous, marked by parasulcal notch offset. Exceptionally, perisulcal area clearly subdivided.
Dimensions of the holotype (without operculum): 100 Ám x 83 Ám (overall L x 1).
Affinities:
Monteil, 1991, p. 476: M. Iongicorna differs from M. tabulata in having a long left antapical horn, sometimes looking like a whip, and a right antapical horn, rather than a rounded bulge.
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Monteil 1996, p.42
Muderongia tabulata (RAYNAUD, 1978) MONTEIL 1991
1978. Phoberocysta tabulata sp. nov. - RAYNAUD, p. 393394, pl. 1, fig. 1, 2.
1991. Muderongia tabulata comb. nov. & emend. MONTEIL, p. 476, pl. 2, fig. 4, 5; pl. 8., fig. 1-6; pl.11, fig. 7.
pars 1996. Muderongia brevispinosa sp. nov. - IOSIFOVA, pl. XIV, fig. 2-4 only.
Remark. The specimen illustrated by IOSIFOVA (1996; pl. XIV, fig. 2-4) as "Muderongia brevispinosa" sp. nov., showing the morphological characteristics included in the emended diagnosis of M. tabulata (type of horns, spinous ornamentation) is reattributed to this latter species.
NOW Phoberocysta. Originally (and now) Phoberocysta, subsequently Muderongia. Poulsen 1996 retained Phoberocysta.
Tax. sr. synonym of Phoberocysta neocomica sbsp. convexa (Gocht, 1957) Lentin and Williams, 1973, according to Monteil, 1991. Phoberocysta tabulata is the tax. sr. synonym at the species rank.
Tax. sr. synonym of Phoberocysta neocomica ssp. pteridia (Gocht, 1957) Lentin and Williams, 1973, according to Monteil, 1991. Phoberocysta tabulata is the tax. sr. synonym at the species rank.
Tax. sr. synonym of Phoberocysta neocomica ssp. subovalis (Gocht, 1957) Lentin and Williams, 1973, according to Monteil, 1991. Phoberocysta tabulata is the tax. sr. synonym at the species rank.
Holotype: Raynaud, 1978, pl.1, fig.1
Locus typicus: N Europe
Stratum typicum: Berriasian-Valanginian
Supplemental diagnosis: Monteil, 1991, p. 476
Cysts proximate to proximochorate, compressed dorsoventrally, two-layered, cornucavate to delphicavate or circumcavate. Pericyst ceratioid, asymmetrical, with 5 prominent horns: 1 apical (axial, type AP l); 2 subequal lateral (axial, type L 1), indented; 2 inequal antapical (joined, type ATP ll). Left lateral horn may be slightly more reduced than the right one. Left antapical horn longer (up to one and one-half times) than the right one, expressed by a rounded bulge. Horns normal to tapered with distal extremities closed and rounded to pointed; proximal extremities narrow to wide. Endocyst oval to rhombic, sometimes with eccentric antapex extending in the left antapical horn. Periphragm thin, psilate to scabrate; periphragm may be ornamented by verrucae, spines or processes (stages I to IV). Spines usually densely distributed on the distal half of the horns, with decreasing density towards the central body. Endophragm thin, psilate to granulate. Archeopyle apical, type (4A), with angular margin. Parasulcal notch marked. Operculum free. Paratabulation indicated by archeopyle, by low parasutural ridges or septa, and more or less clearly expressed by distribution and type of processes (stages I to IV), when those are present. Occasionally, periphragm showing penitabular verrucae. Formula: ?pr, 4", 0a, 6", 6c, 6""", 1p, 1"""", 3s (with rs, Is and ps fused), fm. Pericingulum marked by indentation of lateral horns and by parallel transverse structures. Perisulcus sinuous, marked by parasulcal notch offset. Exceptionally, perisulcal area clearly subdivided.
Dimensions of the holotype (without operculum): 100 Ám x 83 Ám (overall L x 1).
Affinities:
Monteil, 1991, p. 476: M. Iongicorna differs from M. tabulata in having a long left antapical horn, sometimes looking like a whip, and a right antapical horn, rather than a rounded bulge.
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Monteil 1996, p.42
Muderongia tabulata (RAYNAUD, 1978) MONTEIL 1991
1978. Phoberocysta tabulata sp. nov. - RAYNAUD, p. 393394, pl. 1, fig. 1, 2.
1991. Muderongia tabulata comb. nov. & emend. MONTEIL, p. 476, pl. 2, fig. 4, 5; pl. 8., fig. 1-6; pl.11, fig. 7.
pars 1996. Muderongia brevispinosa sp. nov. - IOSIFOVA, pl. XIV, fig. 2-4 only.
Remark. The specimen illustrated by IOSIFOVA (1996; pl. XIV, fig. 2-4) as "Muderongia brevispinosa" sp. nov., showing the morphological characteristics included in the emended diagnosis of M. tabulata (type of horns, spinous ornamentation) is reattributed to this latter species.