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Beltanella
Classification
Phylum:
Cnidaria
Class:
Hydrozoa
Order:
Trachylinida
Suborder:
Trachymedusina
Family:
Trachynematidae
Formal Genus Name and Reference:
Beltanella SPRIGG, 1947
Type Species:
B. gilesi
Images
(Click to enlarge in a new window)
Fig. 56. *B. gilesi; 1a, reconstruction of umbrella with section removed, X0.5; 1b, diagrammatic sketch of subumbrellar surface, X0.55 (SPRIGG); 2, holotype, X0.55 (SPRIGG)
Synonyms
Geographic Distribution
S.Austral.
Age Range
Beginning Stage in Treatise Usage:
L.Cam.
Beginning International Stage:
Fortunian
Fraction Up In Beginning Stage:
0
Beginning Date:
538.8
Ending Stage in Treatise Usage:
L.Cam.
Ending International Stage:
Cambrian Stage 4
Fraction Up In Ending Stage:
40
Ending Date:
512.3
Description
Exumbrellar impression circular, outer ring (?velum) concentrically striated, narrow; inner field (? stomach) large, circular, with 2 central concentric grooves (? oral structures); intermediate annular zone crossed by 4 paired grooves 90' apart (? radial canals), with 2 evenly spaced circular markings in each quadrant (? gonads); ring canal and tentacles absent. [SPRIGG compared the only known impression with the living genus Rhopalonema]
References
Sprigg, R. G., 1947, Early Cambrian(?) jellyfishes from the Flinders ranges, South Australia: Roy. Soc. S.Australia, Trans., v. 71, pt. 2, p. $212-$ 224, pl. 5-8.
Museum or Author Information
Classification
Phylum:
Cnidaria
Class:
Hydrozoa
Order:
Trachylinida
Suborder:
Trachymedusina
Family:
Trachynematidae
Formal Genus Name and Reference:
Beltanella SPRIGG, 1947
Type Species:
B. gilesi
Images
(Click to enlarge in a new window)
Fig. 56. *B. gilesi; 1a, reconstruction of umbrella with section removed, X0.5; 1b, diagrammatic sketch of subumbrellar surface, X0.55 (SPRIGG); 2, holotype, X0.55 (SPRIGG)
Synonyms
Geographic Distribution
S.Austral.
Age Range
Beginning Stage in Treatise Usage:
L.Cam.
Beginning International Stage:
Fortunian
Fraction Up In Beginning Stage:
0
Beginning Date:
538.8
Ending Stage in Treatise Usage:
L.Cam.
Ending International Stage:
Cambrian Stage 4
Fraction Up In Ending Stage:
40
Ending Date:
512.3
Description
Exumbrellar impression circular, outer ring (?velum) concentrically striated, narrow; inner field (? stomach) large, circular, with 2 central concentric grooves (? oral structures); intermediate annular zone crossed by 4 paired grooves 90' apart (? radial canals), with 2 evenly spaced circular markings in each quadrant (? gonads); ring canal and tentacles absent. [SPRIGG compared the only known impression with the living genus Rhopalonema]
References
Sprigg, R. G., 1947, Early Cambrian(?) jellyfishes from the Flinders ranges, South Australia: Roy. Soc. S.Australia, Trans., v. 71, pt. 2, p. $212-$ 224, pl. 5-8.