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... THRESKIORNITHIDAE ... (9 elements)

... ESKIORNITH ... (14 elements)

THRESKIORNITHIDAE · THRESKIORNITHIDE · THRESKIORNITHIDES · THRESKIORNITHINAE

... HRESKIORNI ... (20 elements)

THRESKIORNIS · THRESKIORNITHIDAE · THRESKIORNITHIDE · THRESKIORNITHIDES · THRESKIORNITHINAE

... IORNITHIDA ... (14 elements)

HELIORNITHIDAE · SOPHIORNITHIDAE · THRESKIORNITHIDAE

... KIORNITHID ... (12 elements)

THRESKIORNITHIDAE · THRESKIORNITHIDE · THRESKIORNITHIDES

... ORNITHIDAE ... (38 elements)

ATRICHORNITHIDAE · CONFUCIUSORNITHIDAE · DROMORNITHIDAE · ELEUTHERORNITHIDAE · HORUSORNITHIDAE · PARADOXORNITHIDAE · PELAGORNITHIDAE · SOPHIORNITHIDAE · STEATORNITHIDAE · THRESKIORNITHIDAE

... RESKIORNIT ... (14 elements)

THRESKIORNITHIDAE · THRESKIORNITHIDE · THRESKIORNITHIDES · THRESKIORNITHINAE

... SKIORNITHI ... (14 elements)

THRESKIORNITHIDAE · THRESKIORNITHIDE · THRESKIORNITHIDES · THRESKIORNITHINAE

... THRESKIORN ... (20 elements)

THRESKIORNIS · THRESKIORNITHIDAE · THRESKIORNITHIDE · THRESKIORNITHIDES · THRESKIORNITHINAE