| a new species of hydra (cnidaria: hydrozoa: hydridae) and molecular phylogenetic analysis of six congeners from china. | a new species of genus hydra (cnidaria: hydrozoa: hydridae), hydra shenzhensis sp. nov. from guangdong province, china, is described and illustrated. most polyps have five tentacles. column length reaches 11 mm when relaxed. buds do not acquire tentacles synchronously. stenotele is broad and pyriform in shape, 1.2 times as long as its width. holotrichous isorhiza is asymmetrical and slender (more than 2.7 times as long as its width), with transverse and slanting coils. atrichous isorhiza is long ... | 2012 | 23215978 |