Superfamily
Hippocardioidea Pojeta et Runnegar, 1976
Selection of related publications
Ebbestad, J. O. R., Rhebergen, F., Gubanov, A. P. 2017. Late Ordovician rostroconchs (Mollusca) from fluvial erratics in northwestern Europe.  Bulletin of Geosciences   92,   4,   405-438. DOI:10.3140/bull.geosci.1675
Rogalla, N. S., Amler, M. R. W. 2006. Revision der Familie Pseudobigaleaidae Hoare, Mapes & Yancey, 2002 (Mollusca; Rostroconchia).  Paläontologische Zeitschrift   80,   2,   167–208. DOI:10.1007/BF02988975
Kiselev, G. N., Sinicyna, I. N., Isakar, M. A., Mironova, M. G., Saladzhius, V. Y. 1990. Atlas mollûskov verhnego ordovika i silura severo-zapada Vostočno-Evropejskoj platformy. pp. 1-80.  Leningrad University. 
Pojeta, J., Runnegar, B. 1976. The paleontology of rostroconch mollusks and the early history of the phylum Mollusca.  Geological Survey of Finland. Professional Paper      968,   1-85.
Isberg, O. 1934. Studien über lamellibranchiaten des Leptaenakalkes in Dalarna. pp. 1-493.  Håkan Ohlssons Buchdruckerei. 
List of species
1. Bitrigonocardia lindstroemi (Isberg, 1934) | Pirgu Stage
3. Hippocardia pygmaea (Hisinger, 1837) | Porkuni Stage
4. Redstonia visbyensis (Pojeta et Runnegar, 1976) | Wenlock
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Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Mollusca | 
| Class | Rostroconchia | 
| Order | Conocardiida | 
| Superfamily | Conocardioidea | 
| Hippocardioidea | |
| Family | Hippocardiidae | 
| Pseudobigaleaidae |