1887

Abstract

The morphology and molecular phylogeny of two novel urostylid ciliates, n. sp. and n. sp., were investigated using the techniques of living observation, protargol impregnation and small-subunit rRNA gene sequencing. Both species were found to be frequent in muddy-sand sediment but very rare in sandy sediment of the intertidal zone of Qingdao Bay, China. is about 90 × 30 µm , with a broadly clavate body shape, and is characterized by a rather short midventral row terminating at 40 % of the body length and a right marginal row 1 terminating at mid-body. is about 190 × 30 µm , and is characterized by a clavate body shape and the presence of 7–10 macronuclear nodules. Phylogenetic analyses showed that clustered robustly with , forming a clade that branches from the Urostylida core clade with high bootstrap values. Based on the morphological and molecular data, we establish a new family, Parabirojimidae n. fam., which comprises and and is distinguished by a unique, roughly T-shaped bipartite adoral zone of membranelles, three enlarged frontal cirri and a midventral complex with midventral pairs confined to the buccal field.

Funding
This study was supported by the:
  • Knowledge Innovation Program of the Chinese Academy of Sciences (Award KZCX2-YW-417)
  • Natural Science Foundation of China (Award 40706047 and 40576072)
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2011-06-01
2021-05-11
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