Open Access
Table II.
Morphological characters of which the four in columns 3 (a, b), 4, 5, 6 differentiate the five species of Heligmosomoides belonging to the “polygyrus line” defined by Asakawa, 1988.
| This article |
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|---|---|---|---|---|---|---|
| Asakawa & Ohbayashi (1986) | Arisal of rays 6 compared to the arisal of rays 4 and 5 on their common trunk |
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| Species | Swelling on 8 rays | Right lobe | Left lobe | Rays 6 // to rays 8 | Direction of extremities of rays 6 | Comparative length of rays 9 and 10 |
| Heligmosomoides p. polygyrus | present | proximally | proximally or at same level | absent | curved to dorsal ray | 9 shorter 10 |
| Heligmosomoides p. bakeri | present | proximally | proximally | absent | curved to dorsal ray | 9 shorter10 |
| Heligmosomoides p. corsicus | present | proximally or at same level | proximally | absent | curved to dorsal ray | 9 shorter10 |
| Heligmosomoides asakawae | present | distally | distally | absent | curved to rays 5 | left 9 as similar size as 10; right 9 longer than ray 10 |
| Heligmosomoides neopolygyrus | absent | proximally | proximally | present | curved to rays 5 | 9 shorter than 10 or 9 as similar size as 10 |
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