Amendment of the status of Pontella sewelli Heinrich, 1987 as a junior synonym of P. sinica Chen & Zhang, 1965, with confirmation of female-male matching by genetic analysis (Copepoda, Calanoida)

in Crustaceana
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Specimens of Pontella sinica Chen & Zhang, 1965, that were collected for the first time from the eastern Indian Ocean, are described, and a revised synonymy of the species is presented, including an amendment of P. sewelli Heinrich, 1987 as a junior synonym of P. sinica. The present specimens agree with most of the previous descriptions except for the frontal, rostral, and/or ventral eye lenses, which have been described as present in some previous studies, but proved to be all absent in the present examination. In addition, an analysis applying mitochondrial cytochrome c oxidase subunit I (mt COI) as a genetic marker confirmed matching of the female and male that were morphologically described by previous workers.

Amendment of the status of Pontella sewelli Heinrich, 1987 as a junior synonym of P. sinica Chen & Zhang, 1965, with confirmation of female-male matching by genetic analysis (Copepoda, Calanoida)

in Crustaceana



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    Sampling location in the Arabian Sea.

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    Pontella sinica Chen & Zhang, 1965 female. A, Habitus, dorsal view; B, right antennule; C, rostrum, posterior view; D, urosome, dorsal view; E, urosome, right lateral view; F, urosome, ventral view; G, 5th legs, posterior view. Arrows indicate 3 small processes located at even intervals on left lateral margin of second urosomal somite.

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    Pontella sinica Chen & Zhang, 1965 male. A, Habitus, dorsal view; B, head, left lateral view; C, rostrum, posterior view, showing anterior and posterior lower frontal lenses in dotted and solid lines, respectively; D, right antennule, number of segments indicated with Roman numerals; E, 5th leg, posterior view. Arrow indicates dorsal eye lenses. Abbreviations: Cox, coxa; Bas, basis; Exp 1, first exopod; Exp 2, second exopod.

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    Maximum likelihood tree for Pontella sinica Chen & Zhang, 1965 and other Pontella species (taken from GenBank with their accession numbers) based on 1000 bootstrap pseudoreplicates. Authorities and dates of the species names mentioned in the figure are: Pontella spinipes Giesbrecht, 1889, P. rostraticauda Ohtsuka, Fleminger & Onbe, 1987, P. chierchiae Giesbrecht, 1889, P. fera Dana, 1849, Acartia negligens Dana, 1849.

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