Family

Hemicystitidae Bassler, 1936

Aiheeseen liittyvät julkaisut

Franzén, C. 1979. Echinoderms. Sveriges Geologiska Undersökning 73, 3, 216-224.

Regnéll, G. 1945. Non-Crinoid Pelmatozoa from the Paleozoic of Sweden. A taxonomic study. Meddelanden från Lunds Geologisk-Mineralogiska Institution 108, 1-255. Carl Bloms Boktryckeri.

Hecker, R. F. 1939. Pyrgocystis iz nižnego silura Leningradskoj oblasti. Izvestiya Akademii Nauk SSSR, Seriya Biologicheskaya 241-246.

List of species

1. Pyrgocystis cylindrica Aurivillius, 1892 | Sheinwoodian

2. Pyrgocystis gracilis Hekker, 1939 | Volkhov Stage

3. Pyrgocystis granulata Aurivillius, 1892 | Wenlock

4. Pyrgocystis procera Aurivillius, 1892 | Sheinwoodian

5. Pyrgocystis pulkovi Hekker, 1939 | Kunda Stage

6. Pyrgocystis sulcata (Aurivillius, 1892) | Wenlock

7. Pyrgocystis varia (Aurivillius, 1892) | Wenlock

8. Pyrgocystis volborthi Hekker, 1939 | Volkhov Stage

Luokittelu

Organism group	Biota
Kingdom	Animalia
Phylum	Echinodermata
Subphylum	Eleutherozoa
Class	Edrioasteroidea
Order	Cyathocystida
Superfamily	Stromatocystitidae
Family	Hemicystitidae
Genus	Pyrgocystis