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Sornayina
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Textulariina
Superfamily:
Lituolacea
Family:
Lituolidae
Subfamily:
Spirocyclininae
Formal Genus Name and Reference:
Sornayina MARIE, 1960, *1224, p. 320
Type Species:
S. foissacensis, OD
Images
(Click to enlarge in a new window)
Fig. 146,3,4. *s. foissacensis, 3 a, b, side and edge of holotype, X17 (*1224), 4, median sec. of megalospheric topotype, showing reticulate subepidermal layer and primary chambers partially subdivided by secondary septula, X18 (*1251).
Synonyms
Geographic Distribution
Eu.(Fr.)
Age Range
Beginning Stage in Treatise Usage:
U.Cret.(Coniac.)
Beginning International Stage:
Coniacian
Fraction Up In Beginning Stage:
0
Beginning Date:
89.39
Ending Stage in Treatise Usage:
U.Cret.(Coniac.)
Ending International Stage:
Coniacian
Fraction Up In Ending Stage:
100
Ending Date:
85.7
Description
Test free, planispiral to asymmetrical, trochospiral, chambers numerous, low and broad, tending to uncoil slightly in later stages, wall agglutinated with considerable cement, imperforate epidermal layer overlying subepidermal alveolar zone, primary chambers subdivided by somewhat irregular transverse partitions perpendicular to septa below alveolar zone, septula progressively reduced to pillars or knobs farther inward, nearly continuous median partition at center dividing test equally, aperture cribrate, filling most of apertural face. [Sornayina differs from Spirocyclina in its less regularly spaced secondary septula, smaller number of chambers in each whorl, and in having a cribrate aperture, instead of a double vertical row of pores.]
References
$\qquad$ Marie, Pierre, \& Meijer, M., 1960, Gabonella, nov. gen., un nouveau genre de Foraminifères du Crétacé supérieur et du Tertiaire basal de l'Afrique Occidentale: Revue Micropaléont., v. 3, no. 3, pl. 167-182, pl. 1-2.
Museum or Author Information
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Textulariina
Superfamily:
Lituolacea
Family:
Lituolidae
Subfamily:
Spirocyclininae
Formal Genus Name and Reference:
Sornayina MARIE, 1960, *1224, p. 320
Type Species:
S. foissacensis, OD
Images
(Click to enlarge in a new window)
Fig. 146,3,4. *s. foissacensis, 3 a, b, side and edge of holotype, X17 (*1224), 4, median sec. of megalospheric topotype, showing reticulate subepidermal layer and primary chambers partially subdivided by secondary septula, X18 (*1251).
Synonyms
Geographic Distribution
Eu.(Fr.)
Age Range
Beginning Stage in Treatise Usage:
U.Cret.(Coniac.)
Beginning International Stage:
Coniacian
Fraction Up In Beginning Stage:
0
Beginning Date:
89.39
Ending Stage in Treatise Usage:
U.Cret.(Coniac.)
Ending International Stage:
Coniacian
Fraction Up In Ending Stage:
100
Ending Date:
85.7
Description
Test free, planispiral to asymmetrical, trochospiral, chambers numerous, low and broad, tending to uncoil slightly in later stages, wall agglutinated with considerable cement, imperforate epidermal layer overlying subepidermal alveolar zone, primary chambers subdivided by somewhat irregular transverse partitions perpendicular to septa below alveolar zone, septula progressively reduced to pillars or knobs farther inward, nearly continuous median partition at center dividing test equally, aperture cribrate, filling most of apertural face. [Sornayina differs from Spirocyclina in its less regularly spaced secondary septula, smaller number of chambers in each whorl, and in having a cribrate aperture, instead of a double vertical row of pores.]
References
$\qquad$ Marie, Pierre, \& Meijer, M., 1960, Gabonella, nov. gen., un nouveau genre de Foraminifères du Crétacé supérieur et du Tertiaire basal de l'Afrique Occidentale: Revue Micropaléont., v. 3, no. 3, pl. 167-182, pl. 1-2.