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In English grammar, "The Helaletidae are" is correct, as the name is a Latin plural. Also, "Helaletidae is" is correct, as the name is treated as a singular as the subject of the sentence. "The Helaletidae is" would NOT be correct, as it is analogous to "The Smiths is" a family. 2603:8080:B200:5CDE:7CAB:3710:BBCE:CB07 (talk) 19:39, 8 May 2023 (UTC)[reply]