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Adnatosphaeridium speciosum
From Fensome et al., 2019:
Adnatophaeridium? speciosum, (Alberti, 1961, p.37, pl.9, fig.13) Stancliffe and Sarjeant, 1990, p.202.
Holotype: Alberti, 1961, pl.9, fig.13; Stancliffe and Sarjeant, 1990, pl.5, fig.6.
Originally Cannosphaeropsis, subsequently Polystephanephorus, thirdly Cannosphaeropsis?, fourthly (and now) Adnatosphaeridium?.
Questionable assignment: Stancliffe and Sarjeant (1990, p.202).
Age: Bathonian–Callovian.
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Original description: [Alberti, 1961, p. 37] (translated from German):
Cannosphaeropsis speciosa n. sp.
Plate 9 Fig. 13
Holotype: The specimen preserved in specimen no. A35 and shown on Plate 9 Fig. 13.
Locus typicus: Hildesheim.
Stratum typicalum: Upper Dogger.
Diagnosis: Shell approximately spherical. With 15 to 17 radial, vase-like appendages that broaden strongly upwards from a narrow base and whose walls are perforated like a net. The oval or polygonal meshes vary in size and can extend from the base to the upper edge of the appendage. This appendage is strongly toothed or divided into individual small, tapering processes. The vase-like appendages are connected at their ends by short fragments of membrane or thin, sometimes long strands.
Additional information: The membrane of the shell is smooth or slightly granulated.
It differs from C. urnaformis Cookson in the short membranous fragments connecting the ends of the vase-like appendages and in the formation of its upper margin, which is closed in C. urnaformis.
Dimensions of the holotype: Φ of the shell 52 μ, total Φ 104 μ. Length of the appendages 18 μ to 23 μ, width at the base 11 μ to 16 μ, at the upper margin 33 μ to 40 μ.
Material: 3 specimens.
Occurrence: Upper Dogger of Hildesheim.
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Original description in German (Alberti, 1961):
Cannosphaeropsis speciosa n. sp.
Taf. 9 Fig. 13
Holotypus: Das im Präparat Nr. A35 aufbewahrte und auf Taf. 9 Fig. 13 dargestellte Exemplar.
Locus typicus: Hildesheim.
Stratum typicum: Oberer Dogger.
Diagnose: Schale annähernd kugelförmig. Mit 15 bis 17 radial stehenden, vasenartigen Anhängen, die sich von einer schmalen Basis nach oben kräftig verbreitern und deren Wandung netzartig durchbrochen ist. Die ovalen oder polygonalen Maschen sind verschieden groß, sie können sich von der Basis bis zum oberen Rand des Anhanges erstrecken. Dieser ist kräftig gezähnt bzw. in einzelne kleine, spitz auslaufende Fortsätze aufgelöst. Die vasenartigen Anhänge sind an ihren Enden durch kurze Membranfetzen oder dünne, zum Teil lange Stränge verbunden.
Zusätze: Die Membran der Schale ist glatt oder leicht granuliert.
Von C. urnaformis Cookson unterscheidet sie sich durch die die Enden der vasenartigen Anhänge verbindenden kurzen Membranfetzen sowie die Ausbildung ihres oberen Randes, der bei C. urnaformis geschlossen ist.
Maße des Holotypus: Φ der Schale 52 μ, Gesamt-Φ 104 μ. Länge der Anhänge 18 μ bis 23 μ, Breite an der Basis 11 μ bis 16 μ, am oberen Rand 33 μ bis 40 μ.
Stoff: 3 Exemplare.
Vorkommen: Oberer Dogger von Hildesheim.
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Remarks by Stancliffe and Sarjeant, 1990, p. 202 (transfer to Adnatosphaeridium):
Remarks: for reasons similar to those outlined above for A. densifilosum, this species cannot be retained in Cannosphaeropsis and is here transferred to Adnatosphaeridium. Stover and Evitt (1978, p. 143) indicated that the species probably has an apical archeopyle and 15-17 process clusters. The holotype, illustrated by Alberti (1961, pl. 9, fig. 13) has well developed trabeculae and processes that appear to be neither gonal nor sutural in location. The holotype is in the German Democratic Republic, its exact whereabouts unknown. Until it is located and restudied, or until a lectotype can be designated and described, this generic reassignment must be considered provisional.
Adnatophaeridium? speciosum, (Alberti, 1961, p.37, pl.9, fig.13) Stancliffe and Sarjeant, 1990, p.202.
Holotype: Alberti, 1961, pl.9, fig.13; Stancliffe and Sarjeant, 1990, pl.5, fig.6.
Originally Cannosphaeropsis, subsequently Polystephanephorus, thirdly Cannosphaeropsis?, fourthly (and now) Adnatosphaeridium?.
Questionable assignment: Stancliffe and Sarjeant (1990, p.202).
Age: Bathonian–Callovian.
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Original description: [Alberti, 1961, p. 37] (translated from German):
Cannosphaeropsis speciosa n. sp.
Plate 9 Fig. 13
Holotype: The specimen preserved in specimen no. A35 and shown on Plate 9 Fig. 13.
Locus typicus: Hildesheim.
Stratum typicalum: Upper Dogger.
Diagnosis: Shell approximately spherical. With 15 to 17 radial, vase-like appendages that broaden strongly upwards from a narrow base and whose walls are perforated like a net. The oval or polygonal meshes vary in size and can extend from the base to the upper edge of the appendage. This appendage is strongly toothed or divided into individual small, tapering processes. The vase-like appendages are connected at their ends by short fragments of membrane or thin, sometimes long strands.
Additional information: The membrane of the shell is smooth or slightly granulated.
It differs from C. urnaformis Cookson in the short membranous fragments connecting the ends of the vase-like appendages and in the formation of its upper margin, which is closed in C. urnaformis.
Dimensions of the holotype: Φ of the shell 52 μ, total Φ 104 μ. Length of the appendages 18 μ to 23 μ, width at the base 11 μ to 16 μ, at the upper margin 33 μ to 40 μ.
Material: 3 specimens.
Occurrence: Upper Dogger of Hildesheim.
---------------------------------------------------------------------------------------------------
Original description in German (Alberti, 1961):
Cannosphaeropsis speciosa n. sp.
Taf. 9 Fig. 13
Holotypus: Das im Präparat Nr. A35 aufbewahrte und auf Taf. 9 Fig. 13 dargestellte Exemplar.
Locus typicus: Hildesheim.
Stratum typicum: Oberer Dogger.
Diagnose: Schale annähernd kugelförmig. Mit 15 bis 17 radial stehenden, vasenartigen Anhängen, die sich von einer schmalen Basis nach oben kräftig verbreitern und deren Wandung netzartig durchbrochen ist. Die ovalen oder polygonalen Maschen sind verschieden groß, sie können sich von der Basis bis zum oberen Rand des Anhanges erstrecken. Dieser ist kräftig gezähnt bzw. in einzelne kleine, spitz auslaufende Fortsätze aufgelöst. Die vasenartigen Anhänge sind an ihren Enden durch kurze Membranfetzen oder dünne, zum Teil lange Stränge verbunden.
Zusätze: Die Membran der Schale ist glatt oder leicht granuliert.
Von C. urnaformis Cookson unterscheidet sie sich durch die die Enden der vasenartigen Anhänge verbindenden kurzen Membranfetzen sowie die Ausbildung ihres oberen Randes, der bei C. urnaformis geschlossen ist.
Maße des Holotypus: Φ der Schale 52 μ, Gesamt-Φ 104 μ. Länge der Anhänge 18 μ bis 23 μ, Breite an der Basis 11 μ bis 16 μ, am oberen Rand 33 μ bis 40 μ.
Stoff: 3 Exemplare.
Vorkommen: Oberer Dogger von Hildesheim.
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Remarks by Stancliffe and Sarjeant, 1990, p. 202 (transfer to Adnatosphaeridium):
Remarks: for reasons similar to those outlined above for A. densifilosum, this species cannot be retained in Cannosphaeropsis and is here transferred to Adnatosphaeridium. Stover and Evitt (1978, p. 143) indicated that the species probably has an apical archeopyle and 15-17 process clusters. The holotype, illustrated by Alberti (1961, pl. 9, fig. 13) has well developed trabeculae and processes that appear to be neither gonal nor sutural in location. The holotype is in the German Democratic Republic, its exact whereabouts unknown. Until it is located and restudied, or until a lectotype can be designated and described, this generic reassignment must be considered provisional.