| 1. | True leeches of the infraclass Euhirudinea have both anterior and posterior suckers.
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| 2. | This infraclass mostly consisted of marine limpets and operculate snails.
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| 3. | Around the same time as Shuotheriidae, the infraclass Australosphenida first appeared.
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| 4. | *Class Prototheria, Infraclass Ornithodelphia, Order Monotremata.
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| 5. | For instance, among the additional ranks of class are superclass, subclass and infraclass.
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| 6. | "' Facetotecta "'is a poorly known infraclass of thecostracan crustaceans.
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| 7. | These two orders belong to the paraphyletic infraclass Palaeoptera however, which is not included in Neoptera.
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| 8. | This mechanism evolved once, and is the defining feature ( synapomorphy ) for the infraclass Neoptera.
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| 9. | Ascothoracida was previously order within the infraclass Cirripedia ( barnacles ), but now considered a separate infraclass.
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| 10. | Ascothoracida was previously order within the infraclass Cirripedia ( barnacles ), but now considered a separate infraclass.
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