Praeschuleridea cf. subtrigona (Jones & Sherborn, 1888)

Wannenmacher, Norbert, Dietze, Volker, Franz, Matthias & Schweigert, Guenter, 2021, New records of ostracods and ammonites from the Aalenian (mainly Concavum Zone) of the Zollernalb (Swabian Alb, SW Germany), Zitteliana 95, pp. 1-55 : 12

Praeschuleridea cf. subtrigona (Jones & Sherborn, 1888)

Fig. 11: 13, 14

Material.

4 C, 5 RV, 13 LV in samples Ro19-1-5.

Occurrence.

Upper Aalenian, Concavum Zone; SW Germany.

Remark.

The specimens from the Roschbach section closely resemble Praeschuleridea subtrigona from the Upper Bajocian to Upper Callovian. It is only tentatively placed in this species because of the remarkable difference in age.

Figures

Figure 11. (1) Balowella catena (Franz et al.), SMNS 70521 / 80, C, right view, L: 0.329 mm; sample He 19 - 18. (2, 3);? Cytheropteron sp. 1, (2) SMNS 70521 / 81, LV, L: 0.322 mm; sample He 19 - 27; (3) SMNS 70521 / 82, RV, L: 0.355 mm; sample He 19 - 27. (4, 5) Procytheropteron aff. gramanni Brand, (4) SMNS 70521 / 83, LV, L: 0.373 mm; sample He 19 - 26; (5) SMNS 70521 / 84, RV, L: 0.305 mm; sample He 19 - 22. (6) Procytheropteron sp. 1 Franz et al., SMNS 70423 / 66, LV, L: 0.322 mm; sample G 20 b; (7) Aphelocythere recta Ohmert, SMNS 70521 / 85, C, right view, L: 0.460 mm; sample Ro 19 - 4. (8) Aphelocythere aff. recta, SMNS 70521 / 86, C, right view, L: 0.466 mm; sample Ro 19 - 4. (9) Aphelocythere sp. 1, SMNS 70521 / 87, RV, L: 0.630 mm; sample He 19 - 27; (10) " Asciocythere " sp., SMNS 70521 / 88, RV, L: 436 mm; sample He 19 - 26. (11) Eocytheridea elongata Bate, SMNS 70521 / 89, RV, L: 0.573 mm; sample He 19 - 21. (12) Eocytheridea lacunosa Bate, SMNS 70521 / 90, RV, L: 0.705 mm; sample He 19 - 25; (13, 14) Praeschuleridea cf. subtrigona, (13) SMNS 70521 / 91, C, right view, L: 0.512 mm; sample Ro 19 - 5; (14) SMNS 70521 / 92, RV, inner view, L: 0.512 mm; sample Ro 19 - 5; (15 - 17) Praeschuleridea sp. 1, (15) SMNS 70521 / 93, C, right view, L: 0.490 mm; sample He 19 - 27, (16) SMNS 70521 / 93, C, right view, (detail); (17) SMNS 70521 / 94, RV, L: 0.620 mm; L: 0.620 mm; sample He 19 - 27. (18) Pleurocythere ohmerti Franz et al., SMNS 70521 / 94, LV, L: 0.479 mm; sample Tst. 38 - 1988 (= He 19 - 27). Achdorf Formation, Upper Aalenian, (1, 6) Bradfordensis Zone (Gigantea Subzone), (2 - 5, 7 - 18) Concavum Zone. Scale bars (if not indicated otherwise): 20 μm.