New records of ostracods and ammonites from the Aalenian (mainly Concavum Zone) of the Zollernalb (Swabian Alb, SW Germany) Author Wannenmacher, Norbert Meraner Str. 61, 86720 Noerdlingen, Germany Author Dietze, Volker https://orcid.org/0000-0001-5927-5162 Meraner Str. 61, 86720 Noerdlingen, Germany dietze.v@t-online.de Author Franz, Matthias Regierungspraesidium Freiburg, Landesamt fuer Geologie, Rohstoffe und Bergbau, Albertstr. 5, 79104 Freiburg i. Br. Germany Author Schweigert, Guenter Staatliches Museum fuer Naturkunde, Rosenstein 1, 70191 Stuttgart, Germany text Zitteliana 2021 2021-06-17 95 1 55 http://dx.doi.org/10.3897/zitteliana.95.56296 journal article http://dx.doi.org/10.3897/zitteliana.95.56296 2747-8106-95-1 F894DD92D76C42E1A4A2852E4D2ADD48 6D901F870E7952C39D59521A71631153 Eucytherura sp. 11 Fig. 9: 7 Material. 1 RV, 2 LV in samples He19-18 and He19-24-25. Occurrence. Upper Aalenian, Bradfordensis Zone; SW Germany. Description. Very small, subrectangular to subtriangular. Anterior margin rounded with extremity slightly below mid-height; posterior margin pointed, apex above mid-height. Posterior cardinal angle rounded; anterior cardinal angle pronounced in both valves, slightly more rounded in left valve. Dorsal straight to slightly concave, ventral margin straight to slightly convex. Greatest height at anterior cardinal angle; greatest length above mid-height. Shell surface strongly reticulate, including the anterior and posterior margins. The coarse-meshed, very prominent reticulation is divided by three ribs, which in the median area delimit an approximately circular area. A middorsal - anteromedian rib, a second middorsal - posteromedian rib, and a ventral rib that is strongly curved up in the anterior midventral section towards the anteromedian region. Another rib starting at the anterior cardinal angle parallels the anterior edge of that circular area approximately halfway to the anterior margin. Eye-tubercle absent; internal details not observed.