◄ Carnets Geol. 19 (20) ►
Outline:
[1. Introduction]
[2. Texas, the United States of America]
[3. Abu Dhabi, the United Arab Emirates]
[4. Alicante, Spain]
[5. Conclusions]
[Bibliographic references] and ...
[Plates]
Dépt. STU, Fac. Sci. Tech., UBO, 6 avenue Le Gorgeu, CS 93837, F-29238 Brest (France)
Published online in final form (pdf) on December 27, 2019
DOI 10.4267/2042/70638
[Editor: Michel Moullade; language editor:
Phil Salvador; technical editor: Bruno Granier]
Involutina hungarica (Sidó, 1952) is reported from Albian strata of Texas (U.S.A.). Earlier records in the scientific literature, where this foraminifer commonly appears under the label "Hensonina lenticularis (Henson, 1947)", are reevaluated. Although it is mostly cited from Albian strata, its first occurrence could be Aptian.
• Cretaceous;
• Albian;
• Texas;
• Abu Dhabi;
• Alicante;
• foraminifers;
• Involutinidae;
• "Hensonina"
Granier B. (2019).- Discussion on some previous records of Involutina hungarica (Sidó, 1952). Revision of the Jesse Harlan Johnson Collection. Part 6.- Carnets Geol., Madrid, vol. 19, no. 20, p. 445-455.
Discussion sur quelques signalements antérieurs d'Involutina hungarica (Sidó, 1952). Révision de la collection Jesse Harlan Johnson. 6e partie.- Involutina hungarica (Sidó, 1952) est signalée dans des couches albiennes au Texas (États-Unis). Des signalements plus anciens, oů ce foraminifčre apparaît couramment sous l'appellation "Hensonina lenticularis (Henson, 1947)", sont réexaminés. Bien qu'il soit principalement cité dans les séries albiennes, sa premičre occurrence pourrait ętre dčs l'Aptien.
• Crétacé ;
• Albien ;
• Texas ;
• Abou Dhabi ;
• Alicante ;
• foraminifčres ;
• Involutinidae ;
• "Hensonina"
On the occasion of the revision of the Jesse Harlan Johnson Collection (Granier et al., 2013, 2017a, 2017b; Granier & Dias-Brito, 2016; Basso & Granier, 2018), the present author got the chance to find foraminifers previously unreported from the Americas (e.g., Montseciella glanensis (Foury, 1968), see Granier et al., 2017a: Fig. 15.M-S,T pars). This new publication deals with the identification of Involutina hungarica (Sidó, 1952) in Albian strata from Texas. This collateral find was previously reported in Consorti et al. (2014) as a personal communication of the present author but it did not come with illustrations to support it. This short contribution also offers the present author the opportunity to better document some other records as "Hensonina lenticularis (Henson, 1947)" and even in some cases to correct previous misidentifications.
The
specimens documented here (Pl. 1 
,
figs. A-W) come from a single thin section
BFP-6513, USNM 42765, which includes the holotype of Permocalculus walnutense
Johnson, 1968. According to Johnson
(1968), the rock sample was
collected in the "Uppermost lime grainstone ledge of Keys Valley Member of
Walnut Formation rimming stock tank on northeast side of Texas Highway 16, 2.1
miles north-northwest of Priddy, Mills County, Texas", i.e., ca.
GPS coordinates 31°42'13.6"N 98°31'17.5"W. Note that the texture is
not that of a grainstone as stated by that author, but that of a bioclastic
wackestone. The structure of these specimens is rather well preserved, i.e.,
in such a way that pores of the umbilical region are visible. The largest
specimen reaches ca. 650 µm in diameter. With more than 20 random
sections from a single thin section, Involutina hungarica (Sidó,
1952) is very abundant in this facies. However, to date that remains the unique
record for the Americas.
Specimens
from the subsurface of the offshore field 'A', from the uppermost Lekhwair (Pl. 1 ,
figs. Y-AA; Pl. 2 , figs. A-F) and the Hawar (Pl. 1 ,
fig. X; Pl. 2 , fig. G)
formations, that were initially ascribed by the present author to "Hensonina
lenticularis (Henson, 1947)", respectively come from the lower
Barremian and from the Bedoulian, i.e., "lower Aptian" (Granier
& Busnardo, 2013). The younger specimens, those from the Hawar
Formation, are slightly ornamented and could be referred to Involutina
hungarica (Sidó, 1952). Accordingly, except for the possibly poorly age-constrained original find
of Sidó
(1952) in Hungary according to Consorti et al.
(2014), it could be
the earliest occurrence of the species. In contrast the older specimens, those
from the Lekhwair Formation, lack ornamentation and thus could be referred to a
discrete species of Involutinidae: cf. Globospirillina neocomiana (Moullade,
1961) or cf. Aulotortus sp. The largest specimen is 750 µm in diameter.
They are quite similar to those found in the Jezzinian (uppermost Barremian -
lower Bedoulian) of Lebanon documented by Maksoud et al.
(2014:
Pl. 4 , figs. S-T) and Maksoud
(2015: Pl. 45, figs. A-K) as "Involutina
hungarica (Sidó, 1952)" with a
maximum diameter reaching 1 mm.
At
Sierra Helada it was erroneously identified in the "Oolithes ŕ
Cylindroporelles et Biolithites de Madréporaires" (Cylindroporella
oolites and coral boundstones), a stratigraphic unit that is given an early
Albian age based on the occurrence of Favusella washitensis (Carsey)
(Pl. 3 , figs. I-K), Orbitolina (Mesorbitolina) subconcava (Leymerie)
and Pseudochoffatella cuvillieri Deloffre. The section
("Coupe du Relais") was logged from the top of the marine cliff (ca.
200 m) up to the electrical substation, "L'Albir Radar Állomás" (435
m). However, when revising the corresponding set of thin sections, the species
studied proves to be missing. It looks like the specimens erroneously ascribed
to this taxon probably refer to Epistominids (Pl. 3 , figs. A-H), i.e., to
another aragonitic foraminiferal genus with a trochospiral plurilocular test,
not with a planispiral bilocular test (or sometimes formerly reported as a
"monolocular" test, e.g., Neumann, 1967; Bignot,
1982).
At
Puig Campana, "Hensonina lenticularis" occurs in both 1) the
"Calcaires ŕ Simplorbitolines" (Simplorbitolina limestones) on
the Realet d'Alt section (Pl. 2 , figs. H-AB;
Pl. 3 , figs. A-AH), in uppermost
Aptian to lower Albian strata with Simplorbitolina manasi Ciry
& Rat, and 2) the "Calcarénites ŕ Hensonines" ("Hensonina
calcarenites") in the Rafel section (Pl. 3 , figs.
AI-AJ; Pl. 4 , figs. A-V),
in association with Neorbitolinopsis conulus (Douvillé) in middle
to upper Albian calciturbidites. In the wackestone facies of the Simplorbitolina
limestones, most specimens are less than 500 µm in diameter; very few are
larger than 600 µm; the structure of the test was lost due to the full leaching
of the aragonitic test. In contrast, in the grainstone facies of the "Hensonina
calcarenites", there is a mix of small and large specimens with a diameter
up to ca. 1050 µm; the structure of test is better preserved and pores
are still visible. In this last rock sample, one can raise the question of
whether these reworked specimens correspond to a single species with discrete
forms or to discrete species.
Paleogeographically, in addition to the countries listed by Consorti et al. (2014) with, from East to West: Iran, Hungary, Austria, France, Spain, and Portugal, the new Texan record of Involutina hungarica represents its westernmost Tethysian find. The Qatari occurrence based on "Trocholina lenticularis Henson, 1947" was excluded from the list by these authors (Consorti et al., 2014) who quite rightly consider that it is a discrete taxon (see Brönnimann & Koehn-Zaninetti, 1969; Schlagintweit & Piller, 1990; Schlagintweit et al., 2015). To our knowledge, there is only one more record of "Trocholina lenticularis henson" outside Qatar, i.e., from lower Cenomanian strata in Portugal (Berthou, 1973: Pl. 2, figs. 2, 2a).
Stratigraphically, the youngest
occurrence of Involutina hungarica could be early Aptian (Bedoulian) in
age as documented here from Abu Dhabi (Pl. 2 , fig. G) but there is not enough
material available to definitely validate this option. An Aptian age was
originally ascribed to Sidó's (1952) original material and to the topotypes of Brönnimann
and Koehn-Zaninetti (1969). The latest Aptian dating as suggested by the
finds in the Realet d'Alt section at Puig Campana (Spain) requires further
consolidation because these strata were originally ascribed to the lower Albian
merely on the basis of first occurrence of "Hensonina lenticularis (Henson,
1947)" (Granier, 1987) and today they should be regarded as
undifferentiated uppermost Aptian to lower Albian strata. Upper Barremian occurrences in Lebanon (Maksoud et al.,
2014;
Maksoud, 2015) and the United Arab Emirates (Granier et al.,
2003; Granier & Busnardo,
2013) do not refer to that species
but to a planispiral bilocular taxon that lacks ornamentation: cf. Globospirillina
neocomiana (Moullade, 1961) or cf. Aulotortus sp.
In 2012, the author benefited from a Smithsonian Fellowship allowing him to investigate the J. Harlan Collection stored in the premises of the Smithsonian Institution. He would like to thank the staff of the Department of Paleobiology at the Smithsonian National Museum of Natural History and particularly William A. and Jonathan G. for their hospitality and having facilitated his work there. This research was also partly sponsored by the Foundation "Carnets de Géologie". This manuscript benefited from the constructive reviews of Sylvain Rigaud and Felix Schlagintweit. Last but not least, the author is very grateful to Phil Salvador who kindly agreed to check the English text.
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Figs. A-W: Involutina hungarica (Sidó, 1952), Keys Valley Member, Walnut Formation, middle Albian, BFP-6513, USNM 42765, Mills County (Texas, USA). Fig. X: cf. Involutina hungarica (Sidó, 1952), Hawar regional Stage, Bedoulian ("lower Aptian"), 7188.9', well 14, field 'A' (offshore Abu Dhabi). Figs. Y-AA: cf. Globospirillina neocomiana (Moullade, 1961), Lekhwair regional Stage, Upper Barremian, 7529', well 14, field 'A' (offshore Abu Dhabi). All photos: graphical scale bar = 250 µm. |
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Figs. A-F: cf. Globospirillina neocomiana (Moullade, 1961), Lekhwair regional Stage, Upper Barremian, 6910.2', well 19, field 'A' (offshore Abu Dhabi). Fig. G: cf. Involutina hungarica (Sidó, 1952), Hawar regional Stage, Bedoulian ("lower Aptian"), 7188.9', well 14, field 'A' (offshore Abu Dhabi). Figs. H-AB: Involutina hungarica (Sidó, 1952), Simplorbitolina limestones, upper Aptian-lower Albian, Realet d'Alt section, Puig Campana, Alicante (Spain), figs. H-K: no. 15, 19366(a); figs. L-O: no. 15, 19366(b); fig. P: no. 14, 19367; figs. Q-R, T-U, W-AB: PC87.1bis(a); fig. S: PC87.1bis(a) = Pl. 8, fig. i in Granier, 1987; fig. V: no. 15, 19366(a) = Pl. 8, fig. g in Granier, 1987. All photos: graphical scale bar = 250 µm. |
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Figs. A-H: Epistominids, Cylindroporella oolites and coral boundstones, lower Albian, Sierra Helada, Alicante (Spain), figs. A, C-D, G: Relais no. 10, HL712; fig. B: Relais no. 12, HL722; fig. E: Relais no. 14, HL726(a); fig. F: Relais no. 14, HL726(b); fig. H: HL702. Figs. I-K: Favusella washitensis (Carsey), Cylindroporella oolites and coral boundstones, lower Albian, Sierra Helada, Alicante (Spain), fig. I: HL702; figs. J-K: Relais no. 10, HL712. Figs. L-AH: Involutina hungarica (Sidó, 1952), Simplorbitolina limestones, upper Aptian-lower Albian, Realet d'Alt section, Puig Campana, Alicante (Spain), figs. L-N: PC87.1bis(c); figs. O, T, AB-AC: PC87.1(b); figs. P, X-Y, AG-AH: PC87.1(c); figs. Q-R, Z-AB: PC87.1bis(b); fig. S: PC87.1bis(d); figs. U-W: PC87.1(a); fig. AF: PC87.1(c) = Pl. 8, fig. h in Granier, 1987. Figs. AI-AJ: Involutina hungarica (Sidó, 1952), "Hensonina calcarenites", middle-upper Albian, Rafel section, Puig Campana, Alicante (Spain), fig. AI: MC194.99(a); fig. AJ: MC194.99(b). All photos: graphical scale bar = 250 µm. |
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Figs. A-V: Involutina hungarica (Sidó, 1952), "Hensonina calcarenites", middle-upper Albian, Rafel section, Puig Campana, Alicante (Spain), fig. A: MC194.99(a) = Pl. 10, fig. a in Granier, 1987; fig. B: MC194.99(c) = Pl. 10, fig. b in Granier, 1987; fig. C: MC194.99(b) = Pl. 10, fig. e in Granier, 1987; figs. D, G-J: MC194.99(b); figs. E-F, K, M-P, R, T: MC194.99(a); figs. L, Q, S, U-V: MC194.99(c). All photos: graphical scale bar = 250 µm. |
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