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Muderongia tomaszowensis
Muderongia tomaszowensis Alberti, 1961; Emendations: Monteil, 1991b, p.477; Riding et al., 2001, p.31.
Taxonomic senior synonym: Wetzeliella? (as Phoberocysta) neocomica, by implication in Monteil (1991b, p.476), who considered Muderongia tomaszowensis to be the senior name — however, this synonymy has not been generally followed;
Taxonomic senior synonym: Muderongia simplex, according to Jain and Khowaja-Ateequzzaman (1984, p.39) and Poulsen (1996, p.59) — however, Riding et al. (2001, p.31) retained Muderongia tomaszowensis.
Holotype: Alberti, 1961, pl.2, fig.12; lost according to Riding et al. (2001, p.31).
Lectotype: Alberti, 1961, pl.2, fig.13; Riding et al., pl.1, fig.7; designated (as a neotype) by Riding et al. (2001, p.31).
Stratum typicum: Valanginian
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Original description: [Alberti, 1961] (translated from German):
Muderongia tomaszowensis n. sp.
Plate 2, Figs. 12 and 13
Holotype: The specimen preserved in preparation no. A 8 and shown on Plate 2, Fig. 12.
Type locality: Tomaszow (Poland).
Stratum typicum: Valendis.
Diagnosis: Carapace flattened, its outline rhomboid, with a strong, ± long, distinct horn-like process at each of the four corners. One antapical horn completely reduced, the other clearly demarcated from the center of the slightly rounded antapex. Lateral horns strongly projecting, often of unequal length, notched at the free ends. Epitheca forming an acute-angled triangle, extending into the long apical horn, which is blunt at the free end. Always with an inner body.
Additional information: The complete reduction of one antapical horn is characteristic of this species. The attachment points of the lateral horns to the carapace are often not in the same plane. A transverse band is only rarely indicated. The inner body lies close to the outer edge of the carapace. Its surface is either smooth or bears widely spaced, very small, thorn-like projections approximately 1 to 1.5 cm in length. A delicate striation of the carapace is also occasionally indicated in this species.
Relationships: From M. simplex n. sp. through the constant possession of only one antacid horn differentiated.
Material: Over 20 copies (some of which are only available as "halves").
Dimensions of the holotype: length 140 μ, width 112 μ. In other specimens, the length varies between 135 μ and 175 μ, the width between 104 μ and 140 μ.
Occurrence: Valendis from Tomaszow (Poland), Valendis from the Dabendorf borehole?
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Emended diagnosis: Monteil, 1991, p. 477
Cysts proximate to proximochorate, compressed dorsoventrally, two-layered, cornucavate to delphicavate or circumcavate. Pericyst ceratioid, symmetrical, with 4 prominent horns: 1 apical (axial, type AP I); 2 subequal lateral (axial, type L I), indented; 1 antapical (axial, type ATP I). Left lateral horn may be slightly more reduced than the right one. Horns normal with distal extremities closed and rounded; proximal extremities narrow, except for the antapical horn which may be wider A small rounded bulge can be present in right antapical position (Pl. 3, figs. 1, 2). Endocyst oval to rhombic. Periphragm thin, psilate to scabrate; periphragm may be ornamented by verrucae or processes (stages I to IV). 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"""". Pericingulum marked by indentation of lateral horns and by parallel transverse structures. Perisulcus marked by parasulcal notch offset. Parasulcal area not observed.
Dimensions of the holotype (with operculum): 140 Ám x 112 Ám (overall L x I).
Taxonomic senior synonym: Wetzeliella? (as Phoberocysta) neocomica, by implication in Monteil (1991b, p.476), who considered Muderongia tomaszowensis to be the senior name — however, this synonymy has not been generally followed;
Taxonomic senior synonym: Muderongia simplex, according to Jain and Khowaja-Ateequzzaman (1984, p.39) and Poulsen (1996, p.59) — however, Riding et al. (2001, p.31) retained Muderongia tomaszowensis.
Holotype: Alberti, 1961, pl.2, fig.12; lost according to Riding et al. (2001, p.31).
Lectotype: Alberti, 1961, pl.2, fig.13; Riding et al., pl.1, fig.7; designated (as a neotype) by Riding et al. (2001, p.31).
Stratum typicum: Valanginian
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Original description: [Alberti, 1961] (translated from German):
Muderongia tomaszowensis n. sp.
Plate 2, Figs. 12 and 13
Holotype: The specimen preserved in preparation no. A 8 and shown on Plate 2, Fig. 12.
Type locality: Tomaszow (Poland).
Stratum typicum: Valendis.
Diagnosis: Carapace flattened, its outline rhomboid, with a strong, ± long, distinct horn-like process at each of the four corners. One antapical horn completely reduced, the other clearly demarcated from the center of the slightly rounded antapex. Lateral horns strongly projecting, often of unequal length, notched at the free ends. Epitheca forming an acute-angled triangle, extending into the long apical horn, which is blunt at the free end. Always with an inner body.
Additional information: The complete reduction of one antapical horn is characteristic of this species. The attachment points of the lateral horns to the carapace are often not in the same plane. A transverse band is only rarely indicated. The inner body lies close to the outer edge of the carapace. Its surface is either smooth or bears widely spaced, very small, thorn-like projections approximately 1 to 1.5 cm in length. A delicate striation of the carapace is also occasionally indicated in this species.
Relationships: From M. simplex n. sp. through the constant possession of only one antacid horn differentiated.
Material: Over 20 copies (some of which are only available as "halves").
Dimensions of the holotype: length 140 μ, width 112 μ. In other specimens, the length varies between 135 μ and 175 μ, the width between 104 μ and 140 μ.
Occurrence: Valendis from Tomaszow (Poland), Valendis from the Dabendorf borehole?
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Emended diagnosis: Monteil, 1991, p. 477
Cysts proximate to proximochorate, compressed dorsoventrally, two-layered, cornucavate to delphicavate or circumcavate. Pericyst ceratioid, symmetrical, with 4 prominent horns: 1 apical (axial, type AP I); 2 subequal lateral (axial, type L I), indented; 1 antapical (axial, type ATP I). Left lateral horn may be slightly more reduced than the right one. Horns normal with distal extremities closed and rounded; proximal extremities narrow, except for the antapical horn which may be wider A small rounded bulge can be present in right antapical position (Pl. 3, figs. 1, 2). Endocyst oval to rhombic. Periphragm thin, psilate to scabrate; periphragm may be ornamented by verrucae or processes (stages I to IV). 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"""". Pericingulum marked by indentation of lateral horns and by parallel transverse structures. Perisulcus marked by parasulcal notch offset. Parasulcal area not observed.
Dimensions of the holotype (with operculum): 140 Ám x 112 Ám (overall L x I).