Mayncina orbignyi ( Cuvillier & Szakall, 1949 )

Simmons, Michael, Bidgood, Michael, Consorti, Lorenzo & Schlagintweit, Felix, 2025, A Review Of The Identity And Biostratigraphy Of Cenomanian “ Larger ” Benthic Foraminifera: Part 1 - The Nezzazatoidea, Acta Palaeontologica Romaniae 21 (1), pp. 5-57 : 13-14

Mayncina orbignyi ( Cuvillier & Szakall, 1949)

Fig. 5

T 1949 Daxia orbignyi n. sp. Cuvillier & Szakall, p. 8.; pl. 2, fig. 1; Cenomanian, France.

1965 Mayncina d’orbignyi Neumann, p. 93; pl. 1, figs. 8- 12; pl. 2, figs. 1-5; Cenomanian, France.

1965 Daxia cenomana Cuvillier & Szakall - Neumann , pl. 1, figs. 1-7; Cenomanian, France [= Mayncina orbignyi fide Loeblich & Tappan, 1987 ]

1985 Mayncina orbignyi - Schroeder & Neumann, p. 16; pl. 2, figs. 1-9; Cenomanian, global review

Non 2007 Mayncina orbignyi - Abu-Zied, fig. 7G-J; Barremian-late Aptian, Sinai, Egypt. [probably= Choffatella decipiens Schlumberger, 1905 ]

? 2012 Daxia cenomana – Omaña et al., pl. 4, fig. 3; middle-late Cenomanian, Mexico.

2016 Coxites zubairensis - Rikhtegarzadeh et al., pl. 1, fig. 6; Cenomanian, Iranian Zagros.

? 2018 Daxia cenomana - Andrade, Es. M5 fig. 5; non M2, fig.1, [= Daxia cenomana ]; Cenomanian, Portugal.

? 2019 Daxia cenomana - Omaña et al., p. 705; figs. 8c, 9a; Cenomanian, Mexico.

? 2020 Mayncina orbignyi - Elbaz & Kassem, pl. 1, fig. 3; early-middle Cenomanian, Gulf of Suez. [external view so identity unconfirmed]

? 2021 Mayncina orbignyi - Shahin & Elbaz, fig. 3(8); early-middle Cenomanian, Gulf of Suez. [external view so identity unconfirmed] .

2023 Mayncina orbignyi – Simmons & Bidgood, p. 60; fig. 11a-b; (late Albian?) middle Cenomanian, global review

Taxonomy/Identity: Planispiral, broadly biconvex and involute with multiple, small areal apertures and more involute than the similar Biconcava and Daxia , which also have single rather than multiple areal openings (see Simmons & Bidgood, 2023). Notable dimporphism is also evident (see illustrations in Schroeder & Neumann, 1985) with higher numbers of chambers in microspheric forms as well as relative proloculus size.

Reference Images: Arnaud-Vanneau & Prestat (in Schroeder & Neumann, 1985), Pl. 2, figs. 1-9, p. 16.

Confident Stratigraphic Range: middle Cenomanian ( Simmons & Bidgood, 2023).

Uncertain Stratigraphic Range: late Albian - early Cenomanian ( Simmons & Bidgood, 2023).

Incorrectly identified records can be found from strata as old as the Barremian-early Aptian ( Abu-Zied, 2007).

Geographic Range: Only confidently known from western France, sparse unconfirmed records extend the range to Mexico and the Arabian Plate ( Simmons & Bidgood, 2023). A curious possible record “unillustrated” is from the Lut Block in eastern central Iran (Motamed al Shariati et al., 2016).

Figures

Fig. 5. Representative illustrations of Mayncina orbignyi: a. Equatorial section, Arnaud-Vanneau & Prestat in Schroeder & Neumann (1985, pl. 2, fig. 7, France); b. Axial section, Arnaud-Vanneau & Prestat in Schroeder & Neumann (1985, pl. 2, fig.8, France). (Reproduced after Simmons & Bidgood, 2023).