Agglutinated Middle-Upper Eocene foraminifera in Jabal Hafit, Al ...

20 H. S. ANAN
Superfamily Lituolacea de BLAINVILLE, 1827
Family Haplophragmoididae MAYNC, 1952
Genus Haplophragmoides CUSHMAN, 1910
Type species : Nonionina canariensis dʼORBIGNY, 1839
Haplophragmoides walteri (GRZYBOWSKI, 1898)
Pl. I, fig. 4
1898. Trochammina walteri GRZYBOWSKI, p. 290, p1. 11, fig.
31.
1981. Haplophragmoides walteri (GRZYBOWSKI).- MORGIEL &
OLSZEWSKA, p. 10, p1. 3, fig. 15.
1982. Haplophragmoides walteri (GRZYBOWSKI).- MILLER et
al., p. 20, p1. 2, fig. 7.
The species is characterized by its involutes planispiral
test, agglutinated wall with fine quartz grains with
siliceous cement, small umbonal depression on both
sides, elongate triangular chambers increasing slowly in
size, slightly depressed and curved sutures.
In the Polish External Carpathians the species ranges
from Senonian to Eocene (MORGIEL & OLSZEWSKA, 1981)
and from Early to Middle Eocene in Labrador Sea, North
Atlantic (MILLER et al., 1982).
In this study, the species occurs in the top Middle Eocene
(P14) of Jabal Hafit.
Genus Ammobaculites CUSHMAN, 1910
Type species : Spirolina agglutinans dʼORBIGNY, 1846
Ammobaculites cubensis CUSHMAN & BERMUDEZ, 1937
Pl. I, fig. 5
1937. Ammobaculites cubensis CUSHMAN & BERMUDEZ, p. 106,
p1. 16, figs 4, 16-18.
1955. Ammobaculites cubensis CUSHMAN & BERMUDEZ.-
ANSARY, p. 17, p1. 1, fig. 1.
1994. Ammobaculites cubensis CUSHMAN & BERMUDEZ.- BOLLI
et al., p. 325, fig. 62.3.
The species was originally described from the Eocene
of Cuba by CUSHMAN & BERMUDEZ (1937) and from the
Middle and Upper Eocene of Egypt (ANSARY, 1955) and
Trinidad (BOLLI et al., 1994).
It is recorded here in the top Middle Eocene (P14) of
Jabal Hafit.
Superfamily Spiroplectamminacea CUSHMAN, 1927
Family Spiroplectamminidae CUSHMAN, 1927
Subfamily Spiroplectammininae CUSHMAN, 1927
Genus Spiroplectinella KISELʼMAN, 1972
Type species : Spiroplecta wrightii SILVESTRI, 1903
Spiroplectinella nuttalli (LALICKER, 1935)
Pl. I, fig. 6
1935. Spiroplectammina nuttalli LALICKER, p. 43, p1. 6, figs
3, 4.
1951. Spiroplectammina nuttalli LALICKER.- CUSHMAN &
STAINFORTH, p. 143, p1. 25, figs 19, 20.
1955. Bolivinopsis nuttalli (LALICKER) - ANSARY, p. 19, p1. 1,
fig. 7.
1997. Bolivinopsis nuttalli (LALICKER).- HUSSEIN, p. 11, fig.
3.10.
2000. Bolivinopsis cf. nuttalli (LALICKER).- ABUL-NASR, p. 72,
fig. 14.11.
LOEBLICH & TAPPAN (1988, p. 111, 112) noted that
the biserial stage of the genus Spiroplectinella is
characterized by its lozenge shaped in cross section and
may have a marginal keel, while it is long and nearly
constant width throughout in Bolivinopsis and ovoid in
Spiroplectammina. Hence, the species is related here to
the genus Spiroplectinella.
The species was originally described from the Eocene of
Venezuela by LALICKER (1935), then in the same horizon
of Ecuador (CUSHMAN & STAINFORTH, 1951) and Egypt
(ANSARY, 1955 ; HUSSEIN, 1997 ; ABUL-NASR, 2000).
It is recorded here from the top Middle to early Late
Eocene (P14 - P15) of Jabal Hafit.
Subfamily Vulvulininae SAIDOVA, 1981
Genus Vulvulina dʼORBIGNY, 1826
Type species : Vulvulina capreolus CUSHMAN, 1928
Vulvulina haeringensis (GÜMBEL, 1868)
1868. Venilina haeringensis GÜMBEL, p. 71, pl. 2, fig. 84.
1975. Vulvulina haeringensis (GÜMBEL).- PROTO DECIMA & de
BIASE, p. 91, pl. 1, figs 4, 23.
1975. Vulvulina haeringensis (GÜMBEL).- BRAGA & GRÜNIG,
p. 102, pl. 5, fig. 5.
1978. Vulvulina haeringensis (GÜMBEL).- PROTO DECIMA &
BOLLI, p. 797, pl. 1, fig. 5.
1988. Vulvulina haeringensis (GÜMBEL).- PARISI & COCCIONI, p.
103, pl. 1, figs 8, 9.
1996. Vulvulina haeringensis (GÜMBEL).- ANAN, p. 149, fig.
3.3.
The species was recorded in Italy (PROTO DECIMA & de
BIASE, 1975 ; BRAGA & GRÜNIG, 1975 ; PARISI & COCCIONI,
1988) and also in South Atlantic, DSDP Leg 40, west
coast of Africa (PROTO DECIMA & BOLLI, 1978).
The species was recorded in the Early Eocene (P9) of
Jabal Hafit (ANAN, 1996). It occurs also in the Middle-
Late Eocene (P14-P15) of the study section.
Vulvulina jarvisi CUSHMAN, 1932
Pl. I, fig. 7
1932. Vulvulina jarvisi CUSHMAN, p. 84, pl. 10, fig. 20.
1976. Vulvulina jarvisi CUSHMAN.- BERGGREN & AUBERT, p.
314, pl. 1, fig. 1.