| #1 | C | ~ heart | yes (1 to 2 mm) | thin | yes (<20 μm) | from Andaman Islands to Japan and New South Wales |
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| P. tumidus | #2 | C | ~ heart | yes (1.2 to 1.8 mm) | thin | yes (<22 μm) | Northern Territory, Sumatra, Lombok, Luzon and Bohol |
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| #3 | C | ~ heart | yes (0.8 to 1 mm) | thin | yes (<28 μm) | Papua New Guinea |
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| P. daemelii | – | B | very short or vestigial | yes (2.5 to 2.7 mm) | thin | no | New South Wales and Queensland |
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| #1 | B | vestigial | yes (1 to 1.2 mm) | thin | no | Bohol and Luzon |
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| P. boholensis | #2 | B | none or vestigial | yes (1.1 to 1.8 mm) | thin | no | Ambon, Bali, Halmahera, Kei, Seram and Sulawesi |
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| P. penangensis | – | A | strong and ~heart | no | large | no | from Western India to Malaysia |
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| #1 | A | thin (~ central nervous system) | no | thin | no | Luzon |
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| P. goslineri | | | or vestigial | | | | |
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| #2 | A | long and ~ heart | no | thin | no | Ambon, Bali, Halmahera, Sulawesi and Timor |
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