Bohmig L 1895 (citation)- p 37, description and illustration, plate 3, from plankton, Guinea current. Also, p 4, 14, 15, 22, 23, 27-29, 31, 32, 38. A good species. Sabussow H 1896 (citation)- in comparison with H. ussowi, Atlantic Ocean species. Salensky W 1907 (citation)- in comparison with H. ussowi- p 839. Luther A 1912 (citation)- mentions this species. Dorjes J 1968 (citation)- lists. Dorjes J 1970 (citation)- definition p 264- also in discussion p 261-4 reprint.
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