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Austrotrillina
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Miliolina
Superfamily:
Miliolacea
Family:
Miliolidae
Subfamily:
Fabulariinae
Formal Genus Name and Reference:
Austrotrillina PARR, 1942, *1426, p. 361
Type Species:
Trillina howchini Schlumberger, 1893, *1656, p. 119, 123, OD
Images
(Click to enlarge in a new window)
Fig. 362,5-8. *A. howchini (SCHLUMBERGER), Mio., Australia; 5a-c, opposite sides and top view of specimen, X35 (*2117); 6a,b, opposite sides of eroded specimen in which alveolar wall character is evident, X35 (*2117); 7,8, long. and transv. secs., X53 (*361).
Synonyms
Geographic Distribution
Pac.O.-Australia-Asia (Iraq.) -E.Afr. (SomaliIand)
Age Range
Beginning Stage in Treatise Usage:
Eoc.
Beginning International Stage:
Ypresian
Fraction Up In Beginning Stage:
0
Beginning Date:
56
Ending Stage in Treatise Usage:
Mio.
Ending International Stage:
Messinian
Fraction Up In Ending Stage:
100
Ending Date:
5.34
Description
Test with chamber arrangement as in Triloculina, new chambers adding layers against previous ones as well as new chamber wall; wall thick, new outer portion alveolar, that against previous chambers thin and simple in structure; chamber cavity undivided; aperture terminal, with trematophore. [Austrotrillina was defined to include some of the species placed by SCHLUMBERGER in Trillina, the type-species of which (T. strigillata D'ORBIGNY) is a true Triloculina; hence, Trillina is a junior synonym of Triloculina.]
References
Museum or Author Information
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Miliolina
Superfamily:
Miliolacea
Family:
Miliolidae
Subfamily:
Fabulariinae
Formal Genus Name and Reference:
Austrotrillina PARR, 1942, *1426, p. 361
Type Species:
Trillina howchini Schlumberger, 1893, *1656, p. 119, 123, OD
Images
(Click to enlarge in a new window)
Fig. 362,5-8. *A. howchini (SCHLUMBERGER), Mio., Australia; 5a-c, opposite sides and top view of specimen, X35 (*2117); 6a,b, opposite sides of eroded specimen in which alveolar wall character is evident, X35 (*2117); 7,8, long. and transv. secs., X53 (*361).
Synonyms
Geographic Distribution
Pac.O.-Australia-Asia (Iraq.) -E.Afr. (SomaliIand)
Age Range
Beginning Stage in Treatise Usage:
Eoc.
Beginning International Stage:
Ypresian
Fraction Up In Beginning Stage:
0
Beginning Date:
56
Ending Stage in Treatise Usage:
Mio.
Ending International Stage:
Messinian
Fraction Up In Ending Stage:
100
Ending Date:
5.34
Description
Test with chamber arrangement as in Triloculina, new chambers adding layers against previous ones as well as new chamber wall; wall thick, new outer portion alveolar, that against previous chambers thin and simple in structure; chamber cavity undivided; aperture terminal, with trematophore. [Austrotrillina was defined to include some of the species placed by SCHLUMBERGER in Trillina, the type-species of which (T. strigillata D'ORBIGNY) is a true Triloculina; hence, Trillina is a junior synonym of Triloculina.]