1. Subgenus Porrocaecum (Laymanicaecum) Mozgovoi, 1951
2. Species Porrocaecum angusticolle (Molin, 1860) Baylis & Daubney, 1936
3. Species Porrocaecum circinum Johnston & Mawson, 1941
4. Species Porrocaecum crassum (Deslongchamps, 1824) Railliet & Henry, 1912
5. Species Porrocaecum depressum (Zeder, 1800)
6. Species Porrocaecum ensicaudatum (Zeder, 1800)
7. Species Porrocaecum falklandicum Baylis, 1929
8. Species Porrocaecum moraveci Gu, Guo, Chen, Sitko, Li, Guo & Li, 2023
9. Species Porrocaecum parvum Li, Guo & Zhang, 2015
10. Species Porrocaecum reticulatum (Linstow, 1899)
11. Species Porrocaecum streperae Johnston & Mawson, 1941
12. Species Porrocaecum talpae (Schrank, 1788)
13. Subgenus Porrocaecum (Porrocaecum) Railliet & Henry, 1912 accepted as Porrocaecum Railliet & Henry, 1912
    1. Species Porrocaecum (Porrocaecum) ardeae (Frölich, 1802) Baylis, 1936
    2. Species Porrocaecum (Porrocaecum) clerci (Skrjabin, 1926) Mozgovoy, 1949
    3. Species Porrocaecum (Porrocaecum) heteroura (Creplin, 1829) Baylis, 1920
    4. Species Porrocaecum (Porrocaecum) semiteres (Zeder, 1800) Baylis, 1920
    5. Species Porrocaecum (Porrocaecum) skrjabinensis Mosgovoy, 1949
    6. Species Porrocaecum (Porrocaecum) spirale (Rudolphi, 1795) Baylis, 1920
14. Species Porrocaecum assymmetricum Ortlepp, 1932 accepted as Ingwenascaris assymmetrica (Ortlepp, 1932) Junker & Mutafchiev, 2017 (unaccepted > junior objective synonym)
15. Species Porrocaecum azarasi Yamaguti & Arima, 1942 accepted as Phocanema azarasi (Yamaguti & Arima, 1942) Bao, Giulietti, Levsen & Karlsbakk, 2023 (unaccepted > superseded combination)
16. Species Porrocaecum crocodili Taylor, 1924 accepted as Terranova crocodili (Taylor, 1924) Hartwich, 1957 accepted as Neoterranova crocodili (Taylor, 1924) Moravec & Justine, 2020 (Superseded combination)
17. Species Porrocaecum decipiens (Krabbe, 1878) Baylis, 1920 accepted as Pseudoterranova decipiens (Krabbe, 1878) Gibson, 1983 accepted as Phocanema decipiens (Krabbe, 1878) Myers, 1959 (Superseded combination)
18. Species Porrocaecum galeocerdonis Thwaite, 1927 accepted as Terranova galeocerdonis (Thwaite, 1927) Mozgovoi, 1953 accepted as Euterranova galeocerdonis (Thwaite, 1927) Moravec & Justine, 2020 (Superseded combination)
19. Species Porrocaecum heteroura (Creplin, 1829) Baylis, 1920 accepted as Porrocaecum (Porrocaecum) heteroura (Creplin, 1829) Baylis, 1920 (unaccepted > superseded combination)
20. Species Porrocaecum hetoura (Creplin, 1829) Baylis, 1920 accepted as Porrocaecum (Porrocaecum) heteroura (Creplin, 1829) Baylis, 1920 (unaccepted > misspelling - incorrect subsequent spelling)
21. Species Porrocaecum kogiae Johnston & Mawson, 1939 accepted as Terranova kogiae (Johnston & Mawson, 1939) Johnston & Mawson, 1945 accepted as Pseudoterranova kogiae (Johnston & Mawson, 1939) Mozgovoi, 1951 (Superseded combination)
22. Species Porrocaecum laymani Mozgovoy, 1950 accepted as Mawsonascaris laymani (Mozgovoy, 1950) Sprent, 1990 (Superseded combination)
23. Species Porrocaecum nidifex (Linton, 1901) Wülker, 1930 accepted as Terranova nidifex (Linton, 1901) Johnston & Mawson, 1945 (Superseded combination)
24. Species Porrocaecum pastinacae (Rudolphi, 1819) Dollfus & Desportes, 1944 accepted as Mawsonascaris pastinacae (Rudolphi, 1819) Sprent, 1990 (Superseded combination)
25. Species Porrocaecum petrovi (Mosgovoi, 1951) Zhukov, 1960 accepted as Mariporrocaecum petrovi (Mosgovoi, 1950) Sheenko, 1985 (Superseded combination)
26. Species Porrocaecum piscium (Rudolphi, 1809) Johnston & Mawson, 1943 accepted as Terranova piscium (Rudolphi, 1809) Mawson, 1953 (unaccepted > superseded combination)
27. Species Porrocaecum pristis Baylis & Daubney, 1922 accepted as Terranova pristis (Baylis & Daubney, 1922) Johnston & Mawson, 1945 accepted as Euterranova pristis (Baylis & Daubney, 1922) Moravec & Justine, 2020 (Superseded combination)
28. Species Porrocaecum rochalimai Pereira, 1935 accepted as Terranova rochalimai (Pereira, 1935) Johnston & Mawson, 1945 accepted as Terranova galeocerdonis (Thwaite, 1927) Mozgovoi, 1953 accepted as Euterranova galeocerdonis (Thwaite, 1927) Moravec & Justine, 2020 (Superseded combination)
29. Species Porrocaecum scoliodontis Baylis, 1931 accepted as Terranova scoliodontis (Baylis, 1931) Johnston & Mawson, 1945 accepted as Neoterranova scoliodontis (Baylis, 1931) Moravec & Justine, 2020 (Superseded combination)
30. Species Porrocaecum secundum Chandler, 1935 accepted as Pulchrascaris secunda (Chandler, 1935) Gibson & Colin, 1982 (unaccepted > superseded combination)
31. Species Porrocaecum skrjabinense Mosgovoy, 1949 accepted as Porrocaecum (Porrocaecum) skrjabinensis Mosgovoy, 1949 (unaccepted > misspelling - incorrect subsequent spelling)
32. Species Porrocaecum sphyrnai Rajyalakshmi, Rao & Shyamasundari, 1985 (unaccepted > nomen nudum)
33. Species Porrocaecum sulcatum (Rudolphi, 1819) accepted as Sulcascaris sulcata (Rudolphi, 1819) Hartwich, 1957 (Superseded combination)
34. Species Porrocaecum bengalensis Lakshmi, Rao & Shyamasundari, 1987 (uncertain > taxon inquirendum)
35. Species Porrocaecum caballeroi Deloya, 1973 (uncertain > taxon inquirendum)
36. Species Porrocaecum cephaloscyllii Yamaguti, 1941 (uncertain > taxon inquirendum)
37. Species Porrocaecum jardimfreirei Fortes, 1981 (uncertain > taxon inquirendum)
38. Species Porrocaecum longispiculum Lakshmi, Rao & Shyamasundari, 1987 (uncertain > taxon inquirendum)
39. Species Porrocaecum muraenesoxi Rajyalakshmi, 1992 (uncertain > taxon inquirendum)
40. Species Porrocaecum paivai Motta & Gomes, 1968 (uncertain > taxon inquirendum)
41. Species Porrocaecum pentkotai Srivastava & Gupta, 1976 (uncertain > taxon inquirendum)
42. Species Porrocaecum ruberum Bilqees, Khanum & Jehan, 1971 (uncertain > taxon inquirendum)
43. Species Porrocaecum spinigerum Lakshmi, Rao & Shyamasundari, 1986 (uncertain > taxon inquirendum)
44. Species Porrocaecum trichiuri Chandler, 1935 (uncertain > taxon inquirendum, Superseded combination)

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