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Pentalonia nigronervosa (sensu Hardy 1931) samples from banana and from Zingiberaceae and Araceae species exhibit fixed differences in DNA sequence in mitochondrial cytochrome oxidase subunit 1 (“DNA barcode”) and in the nuclear gene elongation factor 1α, and have morphometric differences, including non-overlapping ranges in the length of the distal rostral segment. It is thus proposed that the name P. nigronervosa Coquerel be restricted to banana-feeding ‘nigronervosa’ specimens, and that the name Pentalonia caladii van der Goot be restored to full species status for specimens typically feeding on Zingiberaceae and Araceae.

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