Vörös A. szerk.: Fragmenta Mineralogica Et Palaentologica 18. 1996. (Budapest, 1996)

Ptychobairdia sp. 1. (Pl. V: 5) Remarks: Specimen with broken posterior end. The ventral swelling is similar to P. lordi sp. n., but the outline is quite different, the shape is very long, the dorsal outline of the left valve is trapezoidal and very low, the anterior and posterior ends are very truncated. The lateral surface is covered by rough reticulation. Dimensions: L = 0.64 mm, H = 0.38 mm, L/H = 1.68 Material: 2 specimens. Ptychobairdia sp. 2. (PI. V:6) Remarks: Fragmentary specimen similar to P. neokristanae Kristan-Tollmann, 1990 and P. kuepperi (Kollmann, 1960). Material: 2 fragmentary right valves. Ptychobairdia sp. 3. (Pl. V: 7) Remarks: Typical "Bairdia" shape with acute posterior end. There is a fair ventral and dorsal swelling, the ventral one has a distinct posterior part near the ventral outline and fades into the lateral surface at 0.25 of the total length far off the ventral outline. There is no similar Jurassic form. Dimensions: L = 0.53 - 0.62 mm, H = 0.35 - 0.36 mm, L/H =1.51-1.72 Material: 48 specimens. Ptychobairdia ? sp. (Pl. V: 8) Remarks: Only the ventral swelling is distinctly sharp, long and straight. It is moved from the ventral position to ~ 0.25 of the total height. Some remains of reticulation are visible. There is no similar Jurassic form. Dimensions: L = 0.69 - 0.88 mm, H = 0.44 - 0.47 mm, L/H =1.51-1.87 Material: 13 specimens. Familia Bythocyprididae Maddocks, 1969 Genus Bythocypris Brady, 1880 Bythocypris ? faba Knitter, 1983 (Pl. VI: 1) 1983. Bythocypris faba n. sp. - KNITTER, pp. 217-218., PI. 35., f. 6-7. 1985. Bythocypris faba Knitter, 1983 - RlEGRAF, p. 76., PI. 2., f. 7-8. Remarks: Somewhat less acute as the type. Dimensions: L = 0.63mm, H = 0.32 mm, L/H = 1.97