Family
Hemicosmitidae Jaekel, 1918
Selection of related publications
Bockelie, J. F. 1981. A re-evaluation of the Ordovician cystoid Stichocystis Jaekel and the taxonomic implications.  GFF   103,   1,   51-59. DOI:10.1080/11035898109455204
Bockelie, J. F. 1979. Taxonomy, functional morphology and palaeoecology of the Ordovician cystoid family Hemicosmitidae.  Palaeontology   22,   2,   363-406.
Rõõmusoks, A. 1970. Stratigraphy of the Viruan Series (Middle Ordovician) in Northern Estonia, I. pp. 1-346.  Valgus. 
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. 
Bekker, H. 1925. Lühike ülevaade Eesti geoloogiast (Eozoiline ja paleozoiline ladekond).  Eesti Loodus. Äratrükk koguteosest "Eesti", pp. 31-61. 
Jaekel, O. 1918. Phylogenie und System der Pelmatozoen.  Paläontologische Zeitschrift   3,   1,   1-128. DOI:10.1007/BF03190413
Jaekel, O. 1899. Stammesgesihichte der Pelmatozoen. Erster Band. Thecoidea und Cystoidea. pp. 1-441.  Verlag von Julius Springer. 
Eichwald, E. 1856. Beitrag zur geographischen Verbreitung der fossilen Thiere Russlands. Alte Periode. (Fortsetzung).  Bulletin of the Moscow Society of Naturalists. Geological series   29,   1,   88-127.
List of species
1. Hemicosmites altus Jaekel, 1918 | Keila Stage
3. Hemicosmites grandis Jaekel, 1899 | Porkuni Stage
6. Hemicosmites oelandicus Regnéll, 1945 | Sandbian
7. Hemicosmites papaveris Bockelie, 1979 | Katian
8. Hemicosmites pocillum Jaekel, 1899 | Jõhvi Substage
9. Hemicosmites porosus Eichwald, 1840 | Upper Ordovician
10. Hemicosmites pulcherrimus Jaekel, 1899 | Oandu Stage
11. Hemicosmites pyriformis Buch, 1840 | Ordovician
12. Hemicosmites rudis Jaekel, 1899 | Keila Stage
13. Hemicosmites sculptus Bockelie, 1979 | Hirnantian
14. Hemicosmites sphaericus Bockelie, 1979 | Sandbian
16. Hemicosmites verrucosus Eichwald, 1856 | Harju Series
17. Tricosmites tricornis (Jaekel, 1899) | Porkuni Stage
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Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Echinodermata | 
| Subphylum | Blastozoa | 
| Class | Rhombifera | 
| Superfamily | Hemicosmitida | 
| Family | Caryocrinitidae | 
| Hemicosmitidae | |
| Genus | Hemicosmites | 
| Tricosmites |