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Archignathidae
Rounded oral groove with no dential processes |
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Haplognathidae
Central squared-off dential process in the middle of the oral groove |
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Acutignathidae
Single sharp dential process in the medial oral groove |
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Enoptrognathidae
Two downcurved dential processes with a central sloped process |
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Tridentidae
Three dential processes within the oral groove |
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Toxodentidae
Two curved processes extending from sides of the oral groove |
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Mycognathidae
Two thick oral processes nearly separate the oral groove |
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Corrugatidae
Three large processes forming small x |
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Kenodontidae
Two large lateral processes with linear gap between. |
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Novenocentridae
Seven sharp processes ringing the oral groove |
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Angulognathidae
Squared-off oral groove |
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Planotectidae
Curved oral groove with squared-off topmost edge |
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Concavigulidae
Two curved processes with diminished inner oral groove |
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Lagotremidae
Two thin furrows extend from a rounded oral groove |
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Spinosacculidae
Four curved processes and thin sharp palps |
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Fusoridae
Crescent-shaped oral groove fused to the outside |
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Inoridae
Round vesicle; oral groove fused to the outside. |
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Kamptoconidae
Long flexible wavy arms surrounding small triangular oral groove |
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Fibulictidae
Long flexible arms, large oral groove and three dential processes |
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Odontotrochidae
Long flexible arms surrounding small many-toothed oral groove |
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Chronovora
Extremely small with hemicircular oral groove |
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Brumalucida
Thin and bracket-like with two simple oral hooks |
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Flexivexilla
Large, flexible and varied morphology |
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Persolla
Oral groove warped asymmetrically into large hooks |