Table 1
Comparative data on the ultrastructure of the mature spermatozoon in some digeneans of the same genus and their origins.
| Families and species | Spermatozoon characters |
Spermatozoon type | Reference | Host and host origin | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Principal characters |
Secondary characters |
||||||||||||||
| TAx | Le | Eo | Eo + Cm | LEo | BCm | LMCm | M | Adm | Sb | Cob | Psc | ||||
| Aephnidiogenidae | |||||||||||||||
| Holorchis micracanthum | 9 + “1” | − | + | + | PostA | 2 | MedS | 1 | + | − | − | Ax | III | [3] | Plectorhinchus mediterraneus (Senegal) |
| Holorchis pycnoporus | 9 + “1” | − | + | + | PostA | 2 | MedS | 2 | + | − | − | Ax | III | [12] | Lithognathus mormyrus (Tunisia) |
| Bucephalidae | |||||||||||||||
| Prosorhynchus aculeatus | 9 + “1” | + | + | + | AntA | 2 | AntS | 1 | − | + | − | Ax | V | [18] | Conger conger (Spain) |
| Prosorhynchus longisaccatus | 9 + “1” | + | + | + | AntA | 2 | AntS | 1 | − | + | − | Ax | V | [26] | Epinephelus maculatus (New Caledonia) |
| Dicrocoeliidae | |||||||||||||||
| Dicrocoelium dendriticum | 9 + “1” | − | − ? | − ? | − ? | 2 | AntS | 1 | − | −? | − | Ax | ? | [8] | Sheep (Unknown origin) |
| Dicrocoelium hospes | 9 + “1” | − | + | + | PostA | 2 | AntS | 2 | − | + | − | N | IV | [1] | Bos indicus (Senegal) |
| Diplodiscidae | |||||||||||||||
| Diplodiscus amphichrus | 9 + “1” | + | + | + | AntA | 2 | AntS | 1 | − | + | − | N | V | [10] | Hoplobatrachus rugulosus (Thailand) |
| Diplodiscus subclavatus | 9 + “1” | + | + | + | AntA | 2 | AntS | 1 | − | + | − | N | V | [5] | Rana lessonae (Belarus) |
| Fasciolidae | |||||||||||||||
| Fasciola gigantica | 9 + “1” | + | + | + | AntA | 2 | AntS | 1 | − | + | − | N | V | [22] | Bos indicus (Senegal) |
| Fasciola hepatica | 9 + “1” | + | + | + | AntA | 2 | AntS | 1? | − | + | − | N | V | [21] | Bos taurus (Spain), Rattus rattus (France) |
| Fellodistomidae | |||||||||||||||
| Tergestia acanthocephala | 9 + “1” | − | + | + | PostA | 2 | AntS | 2 | − | + | − | N | IV | [13] | Belone belone gracilis (Tunisia) |
| Tergestia clonacantha | 9 + “1” | − | + | + | PostA | 2 | MedS | 2 | − | + | − | N | III | Present study | Hemirhamphus far (New Caledonia) |
| Tergestia laticollis | 9 + “1” | − | + | + | PostA | 2 | MedS | 2 | − | + | − | N | III | Present study | Carangoides chrysophrys (New Caledonia) |
| Hemiuridae | |||||||||||||||
| Lecithochirium microstomum | 9 + “1” | − | + | + | AntA | 2 | MedS | 1 | − | − | − | Ax | II | [23] | Trichiurus lepturus (Senegal) |
| Lecithochirium musculus | 9 + “1” | − | + | + | AntA | 2 | MedS | 1 | − | − | − | Ax | II | [23] | Anguilla anguilla Corsica (France) |
| Lepocreadiidae | |||||||||||||||
| Bianium arabicum | 9 + “1” | + | + | + | PostA | 2 | MedS | 2 | + | + | − | N | III | [30] | Lagocephalus sceleratus (New Caledonia) |
| Bianium plicitum | 9 + “1” | + | + | + | PostA | 2 | MedS | 2 | + | + | − | N | III | [30] | Lagocephalus laevigatus (Senegal) |
| Notocotylidae | |||||||||||||||
| Notocotylus neyrai | 9 + “1” | − | + | + | AntA | 2 | AntS | 2 | − | + | − | Ax | Undefined | [20] | Microtus agrestis (Spain) |
| Notocotylus noyeri | 9 + “1” | − | + | + | PostA | 2 | AntS | 2 | − | + | − | Ax | IV | [24] | Microtus arvalis (Belarus) |
| Opecoelidae | |||||||||||||||
| Allopodocotyle pedicellata | 9 + “1” | − | + | + | PostA | 2 | AntS | 2 | + | + | − | Cm | IV | [6] | Sparus aurata (Tunisia) |
| Allopodocotyle tunisiensis | 9 + “1” | − | + | + | PostA | 2 | AntS | 2 | + | + | − | Cm | IV | [15] | Solea aegyptiaca (Tunisia) |
| Helicometra epinepheli | 9 + “1” | − | + | + | PostA | 2 | MedS | 2 | + | + | − | Cm | III | [29] | Epinephelus fasciatus (New Caledonia) |
| Helicometra fasciata | 9 + “1” | − | − | − | − | 2 | MedS | 1 | + | − | − | Cm | Undefined | [16] | Labrus merula (France) |
| Nicolla testiobliquum | 9 + “1” | − | + | + | PostA | 2 | MedS | 2 | − | + | − | Cm | III | [27] | Salmo trutta (France) |
| Nicolla wisniewskii | 9 + “1” | − | + | + | PostA | 2 | MedS | 1? | − | + | − | Cm | III | [28] | Salmo trutta (France) |
| Opisthorchiidae | |||||||||||||||
| Opisthorchis felineus | 9 + “1” | − | + | + | PostA | 2 | AntS | 2 | − | − | − | N | IV | [32] | Mesocricetus auratus (Unknown origin) |
| Opisthorchis viverrini | 9 + “1” | − | + | + | PostA | 2 | AntS | 2 | − | + | − | Ax | IV | [19] | Mesocricetus auratus (Thailand) |
| Zoogonidae | |||||||||||||||
| Lecithostaphylus parexocoeti | 9 + “1” | − | + | + | AntA | 2 | AntS | 2 | − | + | − | N | Undefined | [4] | Cheilopogon pinnatibarbatus (Senegal) |
| Lecithostaphylus retroflexus | 9 + “1” | − | + | + | PostA | 2 | AntS | 2 | − | + | − | N | IV | [14] | Belone belone gracilis (Tunisia) |
Adm, anterior electron-dense material; AntA, anterior part of the anterior region; AntS, anterior region of the spermatozoon; Ax, axoneme; BCm, number of bundles of cortical microtubules; Cm, cortical microtubules; Cob, cytoplasmic ornamented buttons; Eo, external ornamentation of the plasma membrane; Eo + Cm, association of external ornamentation with cortical microtubules; Le, lateral expansion; LEo, location of the external ornamentation; LMCm, location of maximum number of cortical microtubules; M, number of mitochondria; MedS, median part of the spermatozoon; N, nucleus; PostA, posterior to the anterior region; Psc, posterior spermatozoon character; Sb, spine-like bodies; TAx, type of axoneme; +/−, presence/absence of considered character; ?, doubtful or unknown data.
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