Two new species of gymnosomatous pteropods from the Gulf of California (Gymnosomata: Pneumodermatidae). Dos nuevas especies de pteropodos gymnosomatous del Golfo de California (Gymnosomata:Pneumodermatidae).

Orso Angulo-Campillo, Gerardo Aceves-Medina



Two new species of gymnosomatous mollusks from the central portion of the Gulf of California, Mexico are described based on radular characteristics. Pneumoderma cicimarensis sp. nov., has a similar morphology to Pneumoderma atlanticum pacificum (Oken, 1815), but differs in the presence of one lobe on the median portion of the wing, a lack of chromatophores in the body and the shape of the radular teeth. The second species Pneumodermopsis tacoi sp.nov., has a similar radula to Pneumodermopsis ciliata (Gegenbaur, 1855) but differs significantly in the number of rows of the radula and the shape of the central tooth.


 Se describen dos nuevas especies de moluscos gymnosomatous procedentes de la porción media del Golfo de California, basados en características de la rádula. Pneumoderma cicimarensis sp. nov., presenta una morfología similar a Pneumoderma atlanticum pacificum (Oken, 1815), pero difiere en la presencia de un lóbulo en la porción media del ala, la usencia de cromatóforos en el cuerpo y en la forma de la rádula. La segunda especie Pneumodermopsis tacoi sp. nov., presenta una rádula similar a Pneumodermopsis ciliata (Gegenbaur, 1855), pero difiere considerablemente en el número de filas en la rádula y en la forma del diente central.


Palabras clave

Key words: holoplanktonic molluscs, new species, Pneumoderma, Pneumodermopsis.

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