Favusella washitensis Carsey 1926 from: Caron, M. (1985): Cretaceous planktic foraminifera. In: Plankton stratigraphy Eds: Bolli, H.M.Saunders, J.B.Perch-Nielsen, K. p. 17–86 | . |
Notice: This catalogue page may contain unedited data.
To find validated information on this taxon please visit the following project pages: |
Species Favusella washitensis Carsey 1926 |
|
|
|
| Discussion / Comments: |
Caron (1985):
3-5 globular chambers form
the last whorl. The primary aperture is arched, umbilical-
extraumbilical, nearly peripheral, with a narrow lip. The test
has a heavily reticulated ornamentation.
Boudagher-Fadel et al. (1997):
Remarks: F. washitensis has commonly four
chambers in the last whorl, but occasionally only
three and a half chambers are visible on the umbilical
side. An intraumbilical aperture occurs with
a microperforate wall which has the surface
covered by anastomosing ridges, which enclose
groups of the microperforations in the cells of the
favose reticulation. Pseudomuricae may or may
not be present at the confluences of the anastomosing
ridges; Plate 4.4, figs 8-9 shows how
incipient pseudomuricae are preserved at the intersection
of the ridges even in the stratigraphically
youngest form of the evolutionary lineage,
recalling its conoglobigerine ancestor. The type specimens of F. washitensis, from the
Washita group, Texas, were lost from the University
of Texas Micropalaeontologica1 Collection and
a neotype was proposed by Plummer (1931) from
the Del Rio Formation (Early Cenomanian), of the
Washita Group, at Shoal Creek, Austin, Texas.
Longoria (1974) noted that Carsey's original
photograph was a dorsal view, showing four and a
half chambers dorsally in the last whorl of the only
figured syntype. Consequently, Longoria (1974)
believed it was significantly different from the neotype
figured by Plummer (1931), as the latter
possessed only four chambers visible dorsally in
the last whorl. Therefore, Longoria proposed a new
neotype from the Grayson Formation of the same
locality, which had four and half chambers visible
dorsally in the last whorl. The specimens with only
four chambers in the last whorl (seen dorsally) were
named by Longoria and Gamper (1977) as the new
species F. conjksa. It is interesting to note that the
specimen figured by Tappan (1940), from the Late
Albian Grayson Formation of north Texas, had four
chambers visible dorsally in the last whorl, while
that figured by Loeblich and Tappan (1961), a topotype
from the Cenomanian of the Del Rio Clay,
Austin, Texas had four and a half chambers. It is
clear from these and other topotypes (e.g. Masters,
1977, plates 25,26, and Michael, 1973, plate 5) that
strict topotypes of F. washitensis can have four to
four and a half chambers visible dorsally in the last
whorl, and three and a half to four chambers visible
on the umbilical side. Longoria's proposal (1974)
for a second neotype was quite unnecessary, even
though it was useful in that a topotypic bullate
specimen was imaged.
The status of Reticuloglobigerina Reiss (1963)
was declared nomen nudum et oblitum by Loeblich
and Tappan, 1984, p. 38. |
| Systematics: |
5
Classis Foraminifera
Familia Favusellidae
Genus Favusella
Species Favusella washitensis
22
Subordo Globigerinina
Superfamilia Favusellacea
Familia Favusellidae
Genus Favusella
Species Favusella washitensis
|
| Synonym list: |
Banner & Desai (1988):
Caron (1985):
Boudagher-Fadel et al. (1997):
1963 Reticuloglobigerina Reiss. - Reiss : p.74
1977 Favusella confusa Longoria & Gamper. - Longoria & Gamper : 204, 207 pl. 3, fig. 4-6 (paratype), 10-12;
pl. 4, fig. 25-27 (holotype)
1997 Favusella washitensis Carsey. - Boudagher-Fadel et al. : 9, 69, 71 pl. 1.2, fig. 6;
pl. 4.3, fig. 7-10;
pl. 4.4, fig. 1-9;
Figure: 4.1
|
| Was used in synonym list of: |
|
|
| References: |
Carsey,D.O. (1926):
Foraminifera of the Cretaceous of Central Texas . University of Texas Bulletin Vol. 2612 p. 1-56
Plummer,H.J. (1931):
Some Cretaceous foraminifera in Texas . University of Texas Bulletin Vol. 3101 p. 109-203
Loeblich,A.R. and Tappan,H. (1961):
Cretaceous planktonic foraminifera: Part I-Cenomanian . Micropaleontology Vol. 7 p. 257-304
Reiss,Z.. (1963):
Reclassification of perforate foraminifera . Bulletin of the Geological Survey of Israel Vol. 29 p. 1-28
Michael,F.Y.. (1973):
Planktonic foraminifera from the Comanchean Series (Cretaceous) of Texas . Journal of Foraminiferal Research Vol. 2 p. 200-220
Longoria,J.F. (1974):
Stratigraphic, morphologic and taxonomic studies of Aptian planktonic Foraminifera . Revista Espanola de MicropaleontologíaNo extraord p. 1-107
Masters,B.A. (1977):
Mesozoic Planktonic Foraminifera.
In: Oceanic Micropalaeontology Eds: Ramsay, A.T.S. p. 301-731
Longoria,J.F. and Gamper,M.A. (1977):
Albian planktoinc foraminifera from the Sabinas Basin of northern Mexico . Journal of Foraminiferal Research Vol. 7(3) p. 196-215
Banner,F.T. (1982):
Apects of Micropalaeontology. , A classification and introduction to the Globigerinacea p. 142-239
Caron,M. (1985):
Cretaceous planktic foraminifera.
In: Plankton stratigraphy Eds: Bolli, H.M.Saunders, J.B.Perch-Nielsen, K. p. 17–86
Banner,F.T. and Desai,D. (1988):
A review and revision of the Jurassic-Early Cretaceous Globigerinina, with special reference to the Aptian assemblages of Speeton (North Yorkshire, England) . J. micropalaeontol. Vol. 7(2) p. 143-185
Boudagher-Fadel,M.K.; Banner,F.T.; Whittaker,J.E. and Simmons,M.D. (1997):
Early Evolutionary History of Planktonic Foraminifera. Vol. 1
|
This work is licensed under a Creative Commons Attribution 2.5 License.
|
|
Taxon Concept provided by