Type Leiper RT 1902 (citation)- found species in accessory canal of Echinocardium cordatum. Graff L v 1903 (citation)- lists as parasite. Leiper RT 1904 (citation)- description and illustration of species. from Kames Bay, Cumrae, N. B. in summer 1902. Graff L v 1904 (citation)- p 23 placed in the genus Haplodiscus. Beklemischev VN 1915 (citation)- compares with his Achoerus caspius. Kaburaki T 1925 (citation)- p 300 in list. Westblad E 1948 (citation)- description and illustration of this species. Westblad says that Graff's 1904 placement in Haplodiscus was unjustified. Karling found in Echnocardium flavescens and Spatangus purpureus (also another species Westblad will publish separately?) in part of gut with shelly fragments. May be color varient of Leiper's species as these are not white but yellow to dark red. p 6- epicytium is made up of large cells fitted together- is this characteristic of parasites? p 11- on yellow color of p 16- on parenchyma of p 39- illustration of penis p 40- comment on penis p 56- in key Hyman LH 1951 (citation) -vol 2, p 131 mentions it from heart urchin. Westblad E 1953 (citation)- p 271 in key to species incola and this. p 270- reports from Naples and also at Plymouth. Westblad E 1954 (citation)- notes this forom the intestine of Echnocardium flavescens from shell gravel. Norway- occurrence is Scandinavian West Coast (Karling), Traudheimfjorden (Bock), and Scotland in Echinocardium cordatum (Leiper) Hickman VV 1956 (citation)- lists. Dorey AE 1965 (citation)- on epidermis and cilia E.M. studies. Steinbock O 1967 (citation)- mentions p 405. Dorjes J 1968 (citation)- lists as 1902. Apelt G 1969 (citation)- p 268 notes Hickman 1956 (citation)- says this is viviparous Jennings JB 1971 (citation)- lists in table p 3 with hosts Echnocardium flavescens and Spatangus purpureus. Dorjes J 1972 (citation)- lists as 1902. Dorjes J, Karling TG 1975 (citation)- Swedish Museum of Natural History. Britain in Echinocardium cordatum. Faubel A 1976 (citation)- mentions p 21. Ehlers U, Doerjes J 1979 (citation)- compare with Avagina polyvacuola p 14.
Notes from synonyms
Notes for Haplodiscus incola
Graff (1904) (citation) placed Avagina incola Leiper, 1902, in Haplodiscus. Westblad (1948) (citation) shows this placement was unjustified. Wilhelmi J 1913 (citation)- mentions p 113.
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