Nonion boueanum (d’Orbigny, 1846)

Vénec-Peyré, Marie-Thérèse & Poignant, Armelle, 2010, Status of foraminiferal collections from the Tertiary Basin of Vienna, and revision of Dentalina spinosa d’Orbigny, 1846 and Nonionina boueana d’Orbigny, 1846, Geodiversitas 32 (3), pp. 479-491 : 486-488

Nonion boueanum (d’Orbigny, 1846) ( Fig. 3 K-M)

Nonionina boueana d’Orbigny, 1846: 108 , pl. 5, figs 11, 12.

Nonion boueanum – Cushman 1939: 12, pl. 3, figs 7, 8. — Poignant 1997: 82, pl. 3, fig. 5; 1999: 150, pl. 3, fig. 9. — Cahuzac & Poignant 2000: 280, 284, figs 7, 11.

Florilus boueanus – Poignant & Pujol 1978: 680, pl. 9, fig. 2.

? Florilus boueanum – AGIP Mineraria 1982: pl. 20, fig. 9.

Hanzawaia boueana – Gebhardt 1994: pl. 13, figs 15, 16.

TYPE MATERIAL. — Lectotype here designated ( MNHN FO 94 , d’Orbigny collection).

TYPE LOCALITY. — Nussdorf ( Austria).

OTHER MATERIAL EXAMINED. — Several specimens from Soos and Baden, collected par Grill, Schlumberger, and Poignant and deposited in the MNHN collections; several specimens from Burdigalian, Langhian and Serravalian localities in Aquitaine ( France) also deposited in the MNHN collections.

DIAGNOSIS

“Coquille ovale, comprimée, lisse, anguleuse au pourtour, formée de douze loges étroites, très arquées, convexes, réunies au centre autour d’une dépression ombilicale assez large. La dernière loge, plane en dessus, représente la forme d’un fer de lance en avant. Ouverture très petite” (d’Orbigny 1846).

FIXATION AND DESCRIPTION OF THE LECTOTYPE This species was described by d’Orbigny on material from Nussdorf. The mount labelled “ Nonionina boueana d’Orb.,Nussdorf , Vienne ” bearing the number MNHN FO 94 in the French collection includes one specimen, glued on a thin glass plate, and a glue mark.

This leads us to assume that d’Orbigny’s original description was probably based on several specimens.The specimen of mount MNHN FO94 closely resembles the one figured by d’Orbigny in 1846 (pl. 5, fig. 11) and might be the same specimen. As the specimen chosen by Papp & Schmid as lectotype of Nonionina boueana does not belong to the syntypic material, it looses this status ( ICZN 1999: article 74.2). Consequently, we designate as lectotype of N. boueana the specimen of mount MNHN FO 94 ( Fig. 3M ) held in the French d’Orbigny collection.

Description

Test subcircular (max. diameter: 596 µm, min. diameter: 564 µm), planispiral, completely involute, bilaterally symmetrical, umbilical area depressed and filled with pustules. Periphery subacute and slightly lobulate in the later portion of the test. Chambers distinct, 12 in the final whorl, increasing gradually in size and more and more elongate from the early part to the later part. Sutures curved, limbate, depressed near the umbilical areas. Aperture small at the base of the apertural area. Some chambers are damaged by a small fracture, which nevertheless does not blind the main characteristics of the species.

ADDITIONNAL OBSERVATIONS

We have observed topotypic material from the Vienna Basin (Nussdorf) selected by Schlumberger in the sands of the d’Orbigny’s collection, specimens collected at Soos (Baden) by Grill and deposited in the MNHN collection, as well as other specimens collected by one of us (Poignant) in the outcrops of Baden. All of them agree with the above description. Additionnal examination by SEM shows that the whole test is perforate except the sutures which are glassy and become deeply incised and filled in the proximal part with some pustules ( Fig. 3K ).

STRATIGRAPHICAL DISTRIBUTION

Nonion boueanum was reported by d’Orbigny (1846) and Cushman (1939) only in the Badenian. According to Poignant and coauthors ( Poignant 1997; Poignant & Pujol 1978; Cahuzac & Poignant 1996, 2000, 2002; Cahuzac et al. 1999) this species seems to appear in the early Burdigalian, and is still present in the Serravallian of Aquitaine (SW France).

Figures

FIG. 3. — A-H, Strictocostella? spinosa (d’Orbigny, 1846); A, topotype (Baden) (MNHN F62163); B, topotype (Baden) (MNHN F62164); C, lectotype (MNHN FO 45); D, E, enlargements of A; F, enlargement of A showing the chamber basal spines; G, H, enlargements of B showing (arrows) the alternating costae running from a part of a chamber to another part of the next chamber; I, J, Nonion commune (d’Orbigny,1846),specimen from Baden (MNHN F62166); K-M, Nonion boueanum (d’Orbigny, 1846); K, specimen from Baden (MNHN F62165); M, lectotype (MNHN FO 94). Scale bars: 100 μm.