Definition: Dorjes J 1968 (citation)- p 112. Geographic distribution: Greenland. Steinbock O 1931 (citation)- p 65 mentions Teraposthia colymbetes as species to be described. Steinbock O 1932 (citation)- p 300 lists from West Groenland but no description- refers to Steinbock O 1931 (citation)- p 65. An der Lan H (1936) (citation)- p 325-6 figure 22,23 description of species mentioned by Steinbock. Westblad E 1948 (citation)- in description p 19, 37, 58. p 19 notes long muscles to outside of circular layer; p 37 says there are not 4 penes- thinks An der Lan H (1936) (citation) has mistaken closely packed sperm for penes; p 58 says so poorly known he can't include in key. Hyman LH 1951 (citation)- vol 2, p 132, places this genus in Family Convolutidae. Ax P 1963 (citation)- says this genus has epithelial nervous system. Steinbock O 1966 (citation)- on brain in p 119. Dorjes J 1968 (citation)- lists, definition of type T. colymbetes. Gives name Tetraposthia An der Lan 1936 (Steinbock 1931 as nomina nuda). definition of genus p 112. Hooge MD 2001 (citation)- moves to family Actinoposthiidae.
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