Heterotrypa Nicholson, 1879

Type species: Monticulipora frondosa d'Orbigny, 1850

Synonyms Author Type Species
Dekayella Ulrich, 1882 Dekayella obscura Ulrich, 1883 (designation invalid?)

This genus includes the species:

  1. Heterotrypa aculeata
  2. Hu, 1986 Late Ordovician Ashgill China WoRMS 1403811
  3. Heterotrypa affinis
  4. (Ulrich, 1890) Late Ordovician Ashgill USA (Illinois) WoRMS 1411492
  5. Heterotrypa astrovae
  6. Pushkin, 1976 Late Ordovician Caradoc Belarus WoRMS 1403812
  7. Heterotrypa compressa
  8. Brood, 1978 Late Ordovician Ashgill Sweden Gotland WoRMS 1403813
  9. Heterotrypa crassimuralis
  10. (Astrova, 1965) Middle Ordovician Arctic Russia WoRMS 1411493
  11. Heterotrypa cystata
  12. (Cumings, 1901) Late Ordovician Ashgill USA (Indiana) WoRMS 1411494
  13. Heterotrypa? dalpiazzi
  14. Vinassa de Regny, 1921 Late Ordovician Italy WoRMS 1403814
  15. Heterotrypa definita
  16. Dyer, 1925 Late Ordovician Ashgill Canada (Ontario) WoRMS 1403815
  17. Heterotrypa enormis
  18. Astrova, 1959 Silurian Ludlovian Russia WoRMS 1403816
  19. Heterotrypa exovaria
  20. Marintsch, 1998 Middle Ordovician USA (Tennessee) WoRMS 1403817
  21. Heterotrypa extensa
  22. Fan & Hu, 1985 Late Silurian China WoRMS 1403818
  23. Heterotrypa foliacea
  24. (Ulrich & Bassler, 1904) Late Ordovician Caradoc USA (Kentucky) WoRMS 1411495
  25. Heterotrypa frondosa
  26. (d'Orbigny, 1850) Late Ordovician Caradoc USA (Ohio, Indiana, Kentucky) WoRMS 1411496
  27. Heterotrypa georgii
  28. Modzalevskaya, 1968 Silurian Ludlovian Russia WoRMS 1403819
  29. Heterotrypa? girvanensis
  30. (Nicholson, 1881) Late Ordovician Caradoc Scotland WoRMS 1411497
  31. Heterotrypa humensis
  32. Ross, 1961 Silurian Australia (NSW) WoRMS 1403820
  33. Heterotrypa incelebrata
  34. Modzalevskaya, 1968 Silurian Ludlovian Russia WoRMS 1403821
  35. Heterotrypa incrustans
  36. Pushkin, 1976 Silurian, Llandovery Belarus WoRMS 1403822
  37. Heterotrypa inflectiformis
  38. Pushkin, 1987 Late Ordovician Belarus WoRMS 1438693
  39. Heterotrypa lata
  40. Kopajevich, 1984 Late Ordovician Ashgill Mongolia WoRMS 1403823
  41. Heterotrypa magnopora
  42. Boulange, 1964 Late Ordovician Ashgill France WoRMS 1403824
  43. Heterotrypa magnopora
    (Homonym)
  44. Marintsch, 1998 Middle Ordovician USA (Tennessee) WoRMS 1403825
  45. Heterotrypa meafordensis
  46. Fritz, 1975 Late Ordovician Ashgill Canada WoRMS 1403826
  47. Heterotrypa? megacanthopora
  48. (Owen, 1960) Silurian Ludlovian Wales WoRMS 1411498
  49. Heterotrypa microstigma
  50. Cumings & Galloway, 1913 Late Ordovician Ashgill USA (Indiana) WoRMS 1403827
  51. Heterotrypa obscura
  52. (Ulrich, 1883) Late Ordovician Caradoc USA (Ohio) WoRMS 1411499
  53. Heterotrypa obvoluta
  54. Pushkin, 2011 Ordovician Belarus WoRMS 1439624
  55. Heterotrypa ovata
  56. Astrova, 1957 Late Silurian Ludlovian Russia WoRMS 1403828
  57. Heterotrypa pajkhoyensis
  58. (Astrova, 1948) Middle Ordovician Russia WoRMS 1411500
  59. Heterotrypa parvulipora
  60. Ulrich & Bassler, 1904 Late Ordovician Caradoc USA (Tennessee, Kentucky) WoRMS 1403829
  61. Heterotrypa patera
  62. Coryell, 1921 Late Ordovician Caradoc USA (Tennessee, Alabama) WoRMS 1403830
  63. Heterotrypa pauca
  64. Perry, 1962 Late Ordovician Caradoc USA (Iowa, Illinois) WoRMS 1403831
  65. Heterotrypa paupera
  66. (Ulrich, 1883) Late Ordovician Caradoc USA (Ohio) WoRMS 1411501
  67. Heterotrypa peripherilata
  68. Fan & Hu, 1985 Late Silurian China (Yunnan) WoRMS 1403832
  69. Heterotrypa? perplexa
  70. Perry & Hattin, 1960 Silurian, Wenlockian USA (Indiana) WoRMS 1403833
  71. Heterotrypa pontensis
  72. Ross, 1961 Early Devonian Australia (Vic.) WoRMS 1403834
  73. Heterotrypa praenuntia
  74. (Ulrich, 1893) Late Ordovician Caradoc USA Minnesota, Estonia, Canada WoRMS 1411502
  75. Heterotrypa praenuntia alexandria
  76. (Fritz, 1957) Ordovician Caradoc=Sandbian-Katian Canada Ontario WoRMS 1415158
  77. Heterotrypa praenuntia echinata
  78. (Ulrich, 1893) Late Ordovician Caradoc USA, Canada WoRMS 1415159
  79. Heterotrypa praenuntia multipora
  80. (Ulrich, 1893) Late Ordovician Caradoc USA (Minnesota) WoRMS 1415160
  81. Heterotrypa praenuntia naevigera
  82. (Ulrich, 1893) Late Ordovician Caradoc USA, Estonia WoRMS 1415161
  83. Heterotrypa praenuntia simplex
  84. (Ulrich, 1893) Late Ordovician Caradoc USA, Estonia WoRMS 1415162
  85. Heterotrypa pretiosa
  86. Modzalevskaya, 1968 Silurian Ludlovian Russia WoRMS 1403835
  87. Heterotrypa qujingensis
  88. Fan & Hu, 1985 Late Silurian China (Yunnan) WoRMS 1403836
  89. Heterotrypa? ramosa
  90. (Owen, 1960) Late Silurian Ludlovian England WoRMS 1411503
  91. Heterotrypa rapinae
  92. Pedder, 1971 Early Devonian Pragian Australia (NSW) WoRMS 1403837
  93. Heterotrypa ridleyana
  94. (Coryell, 1921) Late Ordovician Caradoc USA (Tennessee, Alabama) WoRMS 1411504
  95. Heterotrypa ringerikensis
  96. Ernst & Nakrem, 2015 Silurian Wenlock Norway WoRMS 1403838
  97. Heterotrypa robusta
    (Homonym?)
  98. (Foord, 1884) Ordovician Ashgill=Katian-Hirnantian Canada Ontario WoRMS 1411505
  99. Heterotrypa robusta
  100. Dyer, 1925 Late Ordovician Ashgill
    Silurian
    Canada
    Mongolia
    WoRMS 1403839
  101. Heterotrypa rugosa
  102. Marintsch, 1998 Middle Ordovician USA (Tennessee) WoRMS 1403840
  103. Heterotrypa semisphaerica
  104. Pushkin, 1976 Ordovician Llandeilo Belarus WoRMS 1403841
  105. Heterotrypa simplex
  106. Dyer, 1925 Late Ordovician Ashgill Canada WoRMS 1403842
  107. Heterotrypa simplex maculosa
  108. Dyer, 1925 Late Ordovician Ashgill Canada WoRMS 1414900
  109. Heterotrypa singularis
  110. Ulrich, 1890 Late Ordovician Ashgill USA (Illinois, Wisconsin, Indiana) WoRMS 1403843
  111. Heterotrypa sladei
  112. Buttler, 1991 Late Ordovician Ashgill Wales WoRMS 1403844
  113. Heterotrypa solitaria
  114. Ulrich, 1883 Late Ordovician Caradoc USA, Canada WoRMS 1403845
  115. Heterotrypa solitaria
    (Homonym)
  116. (Dyer, 1925) Late Ordovician Ashgill Canada WoRMS 1411506
  117. Heterotrypa spinosa
  118. Kopajevich, 1984 Silurian Landovery-Wenlockian Mongolia WoRMS 1403846
  119. Heterotrypa subfrondosa
  120. (Cumings, 1902) Late Ordovician Ashgill USA (Indiana) WoRMS 1411507
  121. Heterotrypa subramosa
  122. (Ulrich, 1879) Late Ordovician Ashgill USA, Canada WoRMS 1411508
  123. Heterotrypa subtrentonensis
  124. Marintsch, 1998 Middle Ordovician USA (Tennessee) WoRMS 1403847
  125. Heterotrypa taffi
  126. Loeblich, 1942 Late Ordovician Caradoc USA (Oklahoma) WoRMS 1403848
  127. Heterotrypa tenuis
  128. Astrova, 1959 Silurian Ludlovian Russia WoRMS 1403849
  129. Heterotrypa trentonensis
  130. (Ulrich, 1883) Late Ordovician Caradoc USA, Canada WoRMS 1411509
  131. Heterotrypa ulrichi
  132. (Nicholson, 1881) Late Ordovician Caradoc USA WoRMS 1411510
  133. Heterotrypa undata
    undulata?
  134. Stewart, 1922 Devonian ?Pragian USA WoRMS 1403850
  135. Heterotrypa undata
  136. Pushkin, 1987 Late Ordovician Sandbian Latvia WoRMS 1438695
  137. Heterotrypa wilmingtonensis
  138. (Ulrich & Bassler, 1904) Late Ordovician USA, Russia, Mongolia WoRMS 1411511
  139. Heterotrypa? zubovkaensis
  140. Modzalevskaya, 1968 Silurian Wenlock Russia WoRMS 1403851

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.

Heterotrypa praenuntia has also been referred to Dekayia, which presumably would reassign all the subspecies to the latter genus.

Dekayella (=Heterotrypa) at University of Georgia.
Dekayella (=Heterotrypa) from Nashville region: at University of Georgia.
Heterotrypa at University of Georgia.
Heterotrypa from Nashville region: at University of Georgia.

Heterotrypa subfrondosa reconstructions at DryDredgers.org.

Heterotrypa from fossiilid.info.


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Edited by Phil Bock
Modified on 3/07/2015
Modified on 3/6/2020 (Added WoRMS links)
Modified on 4/6/2020 (Added 4 species)
This URL is http://bryozoa.net/trepostomatida/heterotrypidae/heterotrypa.html