What's the difference between abdominalia and cirriped?

Abdominalia

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Definition:

• (n. pl.) A group of cirripeds having abdominal appendages.

Example Sentences:

• (1) In up to 80%, symptoms in the form of skin rash, arthritis and abdominalia are observed.

Cirriped

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Definition:

• (n.) One of the Cirripedia.

Example Sentences:

• (1) Such an arrangement was found not only in other calanoid copepod species but also in a cirriped, an euphausid, and a spider.