Reticulofenestra

Reticulojenestra caucasica Hay, Mohler & Wade, 1966

Apertapetra Hay, Mohler & Wade, 1966

Stradnerius Haq, 1968

Crenalithus Roth, 1973

The species of this genus are primarily identified based on their overall size and the ratio of the pelaga to the central area.

Elliptical Groups

Reticulofenestra gelida group

• Reticulofenestra asafis Varol, in prep.
• Reticulofenestra clemencesalleyae Varol, in prep.
• Reticulofenestra gelida (Geitzenauer in Geitzenauer & Huddlestun, 1972) Backman, 1978
• Reticulofenestra hesslandii (Haq, 1966) Roth, 1970
• Reticulofenestra subrotunda Varol, in prep.
• Prinsius minutus Haq, 1971 (Reticulofenestra minuta is preoccupied)

Reticulofenestra pseudoumbilicus group

• Reticulofenestra umbilicus (Levin, 1965) Martini & Ritzkowski, 1968
• Reticulofenestra pelycomorphus (Reinhardt, 1966) de Kaenel in de Kaenel & Mojon, 2023
• Reticulofenestra pseudoumbilicus (Gartner, 1967a) Gartner, 1969b
• Reticulofenestra caucasica Hay, Mohler & Wade,1966
• Reticulofenestra tenuistriata (Kamptner) Varol, 1989a
• Reticulofenestra ampliumbilicus Theodoridis, 1984
• Reticulofenestra dictyoda (Deflandre & Fert, 1954) Stradner in Stradner & Edwards, 1968
• Reticulofenestra simillimus (Deflandre & Fert, 1954) Varol, n. comb.

Reticulofenestra primitiva Group

• Reticulofenestra hillae Bukry & Percival, 1971
• Reticulofenestra lata (Maiorano, 2006) Varol, amended.
• Reticulofenestra primitiva Gheta, 1982
• Reticulofenestra sp_A
• Reticulofenestra asanoi Sato & Takayama (1992)
• Reticulofenestra zancleana di Stefano & Sturiale, 2010

Circular Group

Reticulofenestra bukryi group

• Reticulofenestra bukryi (Wise, 1973) Varol, n. comb.
• Reticulofenestra dennei Varol, 2025a
• Reticulofenestra laevis Hay et al., 1967
• Reticulofenestra looseae Varol, 2025a
• Reticulofenestra pospichalii de Kaenel & Bergen in Boesiger et al., 2017
• Reticulofenestra rotaria Theodoridis, 1984
• Reticulofenestra rupeliensis (Müller, 1970) de Kaenel in de Kaenel & Mojon, 2023

Optical Properties: Reticulofenestra displays specific optical properties. These include inclined dextrogyre extinction lines, with angles typically around 9° on the distal shield and 77° on the tube cycles on the distal side. The species of Reticulofenestra also exhibits length-fast (-) elongation.

An overview of Reticulofenestra species is presented in Table 5 in Varol (2025a).

Circular to elliptical concave-convex placoliths exhibit several distinctive features. The distal shield is larger than the proximal shield. The central area is typically void or covered by a delicate net, which is often not preserved. A tube cycle surrounds the central area.

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Boesiger, T. M., de Kaenel, E., Bergen, J. A., Browning, E. & Blair, S. A. 2017. Oligocene to Pleistocene taxonomy and stratigraphy of the genus Helicosphaera and other placolith taxa in the circum North Atlantic Basin. Journal of Nannoplankton Research. 37(2-3): 145-175.

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