Procytheropteron sp. 1 Franz et al., 2018

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 : 10

Procytheropteron sp. 1 Franz et al., 2018

Fig. 11: 6

Material.

2 LV in sample He19-24 and from the Geisingen clay pit.

Distribution.

Upper Aalenian, Bradfordensis Zone; SW Germany.

Description.

Very small, ovoidal. Anterior margin almost symmetrically rounded; posterior margin pointed, apex at mid-height. Cardinal angles rounded in the left valve.

Dorsal margin straight to slightly convex, ventral margin convex, medianly partly obscured by a median overhang of the lateral curvature. The complete lateral surface is decorated with vertical, broadly rounded ribs. The ribs in the median part of the valve are irregular, interrupted at about mid-height, and offset laterally against each other. The vertical ribs are framed by a curved ventral rib, which is also rounded, and a similar dorsal rib, which almost touch each-other mid-posteriorly.

Internal details not observed.

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.