Hemiphragma Ulrich, 1893

Type species: Batostoma irrasum Ulrich, 1886

Synonyms Author Type Species
Labyrinthotuba Gorka, 1969 Labyrinthotuba kozlowskii Gorka, 1969 (=Batostoma irrasa Ulrich, 1886)

This genus includes the species:

  1. Hemiphragma bassleri
  2. Ruedemann, 1925 Ordovician Caradoc USA New York WoRMS 1403648
  3. Hemiphragma batheri
  4. Bassler, 1911 Ordovician Caradoc Sweden, Belarus WoRMS 1403649
  5. Hemiphragma bondarevi
  6. Astrova, 1965 Ordovician Llanvirn-Caradoc Russia WoRMS 1403650
  7. Hemiphragma? convexa
  8. (Gorka, 1969) Ordovician Poland WoRMS 1411450
  9. Hemiphragma curvilineum
  10. Conti, 1990 Ordovician Italy Sardinia WoRMS 1403651
  11. Hemiphragma imperfectum
  12. (Ulrich, 1890) Ordovician Ashgill USA Illinois WoRMS 1411451
  13. Hemiphragma irrasum
  14. (Ulrich, 1886) Ordovician USA Minnesota WoRMS 1411452
  15. Hemiphragma nonnulum
  16. Astrova, 1965 Ordovician Llanvirn-Caradoc Russia WoRMS 1403652
  17. Hemiphragma ottawaense
  18. (Foord, 1883) Ordovician Caradoc Canada Ontario, USA WoRMS 1411453
  19. Hemiphragma panderi
  20. (Dybowski, 1877) Ordovician Caradoc Estonia WoRMS 1411454
  21. Hemiphragma pitchishuensis
  22. Modzalevskaya, 1979 Silurian Russia WoRMS 1403653
  23. Hemiphragma priscum
  24. Pushkin, 1999 Ordovician Belarus? WoRMS 1403654
  25. Hemiphragma pulchrum
  26. Loeblich, 1942 Ordovician Caradoc USA Oklahoma WoRMS 1403655
  27. Hemiphragma pygmaeum
  28. Bassler, 1911 Ordovician Sweden, Belaraus, Wales WoRMS 1403656
  29. Hemiphragma rotundatum
  30. Bassler, 1911 Ordovician Llanvirn Estonia WoRMS 1403657
  31. Hemiphragma shermanense
  32. Fritz, 1957 Ordovician Caradoc Canada WoRMS 1403658
  33. Hemiphragma subirrasum
  34. Männil et Pushkin, 1987 Middle Ordovician Darriwilian Estonia WoRMS 1403659
  35. Hemiphragma subnonnulum
  36. Modzalevskaya, 1980 Ordovician Russia WoRMS 1403660
  37. Hemiphragma subtile
  38. Conti, 1990 Ordovician Italy Sardinia WoRMS 1403661
  39. Hemiphragma? tuberculatum
  40. Nekhorosheva, 1965 Ordovician Caradoc Russia WoRMS 1403662

Hemiphragma batheri at fossiilid.info.

Hemiphragma convexa at fossiilid.info.

Hemiphragma subirrasum at fossiilid.info.

This information is based upon various sources, but no personal knowledge. I am indebted to the late Alan Horowitz for his compilation, and to Dr. J. Pachut.
I would be grateful for corrections to, or critical reviews of this information. This is not a 'final' version (an impossible ideal), but a working document.


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Edited by Phil Bock
Modified on 19/6/2017
Modified on 19/9/2017 (Addded H.subirrasum)
Modified on 2/6/2020 (Added WoRMS links)
This URL is http://bryozoa.net/trepostomatida/dittoporidae/hemiphragma.html