Zeauvigerina lodoensis Martin 1943 from: Pearson, P.N.Olsson, R.K.Hemleben, C.Huber, B.T.Berggren, W.A. (2006): Atlas of Eocene Planktonic Foraminifera. p. 1-513 | . |
Notice: This catalogue page may contain unedited data.
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Species Zeauvigerina lodoensis Martin 1943 |
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| Diagnosis / Definition: |
Pearson et al. (2006):
DESCRIPTION.
Type of wall: Microperforate, finely pustulose,
lacking pore mounds.
Test morphology: Test small, elongate, initially
blunt then gradually tapering, oval in cross-section;
periphery rounded rather than compressed; early
chambers biserial throughout, slightly compressed, later
becoming increasingly globular, gradually increasing in
size, 14-16 in adult tests; sutures depressed nearly
perpendicular to the growth axis; aperture nearly terminal
on a short neck and raised from the base of the final
chamber face.
Size: Holotype length 0.32 mm, width 0.23 mm,
breadth 0.10 mm; paratype (USNM 38953) length 0.32
mm, width 0.15 mm, breadth 0. l l mm. |
| Discussion / Comments: |
Pearson et al. (2006):
DISTINGUISHING FEATURES-
Distinguished from
other zeauvigerinids by its more gently tapering test with
a blunt initial end, more inflated adult chambers, necked
aperture that is angled toward the apical axis rather than being terminal in position, and by lacking development
of a uniserial final chamber.
DISCUSSION-
The taxonomic position, stratigraphic
distribution and phylogeny of this species are uncertain
since the type material is not well preserved and it has only been recorded in the Lodo Formation of California.
PHYLOGENETIC RELATIONSHIPS.-
May have
been derived from Z. aegyptiaca during the late
Paleocene.
STRATIGRAPHIC RANGE.-
Found only in the upper
Paleocene-lower Eocene Lodo Fm., Lodo Gulch, Panoche Quadrangle, Fresno County, California (~Zone
P4-E4).
GEOGRAPHIC DISTRIBUTION.-
This species has
only been recorded in Califopia.
STABLE ISOTOPE PALEOBIOL0GY.-
No data are
available.
REPOSITORY.-
Holotype originally deposited in the
Paleontological Type Collection, Stanford University,
California but may have been sent to the University of
California, Berkeley Museum collections; paratypes
(USNM 38953) deposited at the Smithsonian Museum
of Natural History, American Museum of Natural History
(#MT-1026), the California Academy of Sciences, and
the Paleontological Research Institution. |
| Systematics: |
35
Ordo Foraminiferida
Superfamilia Globigerinaceae
Familia Heterohelicidae
Genus Zeauvigerina
Species Zeauvigerina lodoensis
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| Synonym list: |
Pearson et al. (2006):
1943 Zeauvigerina lodoensis Martin. - Martin : p.111 pl. 5; fig. 1 [lower
Eocene, Lodo Fm., Fresno County, California]
2006 Zeauvigerina lodoensis Martin. - Pearson et al. : p.482 pl. 16.4; fig. 3, 4 (Pl. 16.4, Figs. 3,4: new SEMs of paratype of
Zeauvigerina lodoensis Martin)
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| Specimen: |
Smithsonian Museum of Natural History, Washington, D.C., Inventory number: USNM 38953
American Museum of Natural History, Inventory number: MT-1026
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| References: |
Martin,L.T. (1943):
Eocene formainifera from the type Lodo Formation, Fresno County, California . Stanford University Publications Geological Sciences Vol. 3 p. 93-125
Huber,B.T. and Boersma,A. (1994):
Cretaceous Origin of Zeauvigerina and its Relationship to Paleocene Biserial Planktonic Foraminifera . Journal of Foraminiferal Research Vol. 24 p. 268-287
Pearson,P.N.; Olsson,R.K.; Hemleben,C.; Huber,B.T. and Berggren,W.A. (2006):
Atlas of Eocene Planktonic Foraminifera. p. 1-513
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