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A NEW SPECIES OF CUMELLA (CUMACEA, NANNASTACIDAE) FROM ARGENTINA, AND A PARTIAL REDESCRIPTION OF CUMELLA VICINA ZIMMER, 1944

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[A new nannastacid cumacean, Cumella biformis, is described from the Argentinean continental shelf. C. biformis is readily distinguished from the other known species of Cumella by having: (1) a short, upturned pseudorostrum lacking projecting siphons and (2) uropods with distal spines fused to the rami and endopods slightly arched. Two distinct forms are recognized for ovigerous females: one large (2.32-2.55 mm) with rudimentary exopods on the third maxilliped and first two peraeopods, and another smaller (2.07-2.24 mm) with fully-developed exopods. The type material of C. vicina Zimmer, 1944 from the Caribbean Sea was examined and a partial redescription of this species is provided.

Se describe una nueva especie del género Cumella (C . biformis) del Mar Argentino. Esta especie se distingue de las restantes del género por presentar: (1) un pseudorrostro corto dirigido hacia arriba con válvulas pseudorrostrales (sifones) que no sobrepasan el pseudorrostro, y (2) urópodos con endopoditos ligeramente arqueados y espinas distales fusionadas a las ramas. C. biformis n. sp. presenta dos morfotipos: uno compuesto por hembras marsupiales grandes (2,32-2,55 mm) con exopoditos rudimentarios y unas pocas sedas diminutas sobre el tercer maxilipedio y los dos primeros pereiópodos, y el otro por hembras marsupiales pequeñas (2,07-2,24 mm) con exopoditos bien desarrollados que portan largas sedas plumosas. Se redescribe brevemente el material tipo de Cumella vicina Zimmer, 1944 (Mar Caribe)., A new nannastacid cumacean, Cumella biformis, is described from the Argentinean continental shelf. C. biformis is readily distinguished from the other known species of Cumella by having: (1) a short, upturned pseudorostrum lacking projecting siphons and (2) uropods with distal spines fused to the rami and endopods slightly arched. Two distinct forms are recognized for ovigerous females: one large (2.32-2.55 mm) with rudimentary exopods on the third maxilliped and first two peraeopods, and another smaller (2.07-2.24 mm) with fully-developed exopods. The type material of C. vicina Zimmer, 1944 from the Caribbean Sea was examined and a partial redescription of this species is provided.

Se describe una nueva especie del género Cumella (C . biformis) del Mar Argentino. Esta especie se distingue de las restantes del género por presentar: (1) un pseudorrostro corto dirigido hacia arriba con válvulas pseudorrostrales (sifones) que no sobrepasan el pseudorrostro, y (2) urópodos con endopoditos ligeramente arqueados y espinas distales fusionadas a las ramas. C. biformis n. sp. presenta dos morfotipos: uno compuesto por hembras marsupiales grandes (2,32-2,55 mm) con exopoditos rudimentarios y unas pocas sedas diminutas sobre el tercer maxilipedio y los dos primeros pereiópodos, y el otro por hembras marsupiales pequeñas (2,07-2,24 mm) con exopoditos bien desarrollados que portan largas sedas plumosas. Se redescribe brevemente el material tipo de Cumella vicina Zimmer, 1944 (Mar Caribe).]

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/content/journals/10.1163/15685400252902362
2002-02-01
2016-09-28

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