The genus Hydra from Argentina. II. Hydra pseudoligactis Hyman, 1931 (Cnidaria; Hydrozoa), a new record

DESERTI, MARIA IRENE; ZAMPONI, MAURICIO OSCAR; ESCALANTE, ALICIA HAYDEÉ

Revista Real Academia Galega de Ciencias

Graficolor Minerva S.R.L.

Lugar: Santiago de Compostela; Año: 2012 vol. 31 p. 5 - 14

1135-5417

This paper deals with Hydra pseudoligactis Hyman, 1931 found in ?Nahuel Rucá? lagoon, Buenos Aires province. This record is new for Argentina, because the references about this species have only registered in North America. The specimens analyzed have in common with pseudoligactis sp. the following characteristics: brown coloration, long tentacles, moderated sizes column, dioecious condition and translucent stalk near to the foot. The measurements registered for their nematocysts are: 10-21(length) x 7-17 (width) μm for stenoteles, 6-9 x 4-6 μm for desmonemes, 6-11 x 3-6 μm for atrichous isorhiza and 8-14 x 3-6 μm for holotrichous isorhiza.