Lucilina saubadeae, Dell'Angelo, Lesport, Cluzaud & Sosso, 2018

Lucilina saubadeae View in CoL Dell’Angelo, Lesport, Cluzaud & Sosso, 2018

Fig. 97 View FIGURE 97

Lucilina saubadeae View in CoL Dell’Angelo, Lesport, Cluzaud & Sosso, 2018a, p. 32, figs 7E–L; Dell’Angelo et al. 2020b, p. 49, tab. 6–7.

Type material. Holotype: MHNBx 2017.10.1, tail valve, width 3.6 mm ( Figs 97A–D View FIGURE 97 ). Paratype: MZB 32136, tail valve.

Type locality. Gaas , Espibos ( France) .

Type stage. Oligocene (Rupelian).

Material examined. Lower Oligocene: France: Gaas : type material plus 3 tail valves, maximum width 5 mm ( AC, DA, PR) .

Description. Head and intermediate valves unknown. Tail valve almost semicircular (W/L = 2.07 for the paratype), anterior margin about straight, mucro small, raised, in posterior position, antemucronal slope concave, postmucronal slope steep, straight to weakly convex.

AMA sculptured with oval, elevated granules, jugal area eroded.

Articulamentum with apophyses well developed, broad, jugal sinus narrow, ca. 8–9 teeth relatively long, solid, forwardly directed.

Remarks. This species is known only for five tail valves from the Oligocene (Rupelian) of Gaas ( France); this record extended the distribution of the genus Lucilina to the lower Oligocene.

This is the only species of Lucilina known for the European Cenozoic. Some species from the Eocene of France were attributed in the past to the genus Tonicia , which could be, in fact, possibly belonging to Lucilina . The only species from the European Cenozoic attributed with certainty to Tonicia is T. pannonica Szőts, 1953 from the middle Eocene of Gant, Hungary, characterized by a smooth tegmentum and the presence of regular rows of subcircular ocelli (Dell’Angelo et al. 2015: fig. 3).

Distribution. Lower Oligocene: northeastern Atlantic (Rupelian): Aquitaine Basin, France: Gaas ( Dell’Angelo et al. 2018a).