How many letters does the top answer for “irregular in the character of the tail or abdomen; as, the anomural crustaceans.” have?

The most common answer is anomuran (8 letters).

Crossword clue: irregular in the character of the tail or abdomen; as, the anomural crustaceans.

1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

anomuran 8 letters web-def

Irregular in the character of the tail or abdomen; as, the anomural crustaceans. [Written also anomoural, anomouran.]