Gymnostomatida

Gymnostomatida

[‚jim·nə′stō·məd·ə]
(invertebrate zoology)
An order of the protozoan subclass Holotrichia containing the most primitive ciliates, distinguished by the lack of ciliature in the oral area.
References in periodicals archive ?
The species registered belong to 11 orders, being Prostomatida the most specious (7 species), followed by Gymnostomatida, Oligotrichida, Peritrichida (with 5 species each), and Scuticociliatida (4 species).
The predominance of Prostomatida, Gymnostomatida and Oligotrichida orders in the Inga Lake corroborates the composition pattern observed in other studies (ARAUJO; COSTA, 2007; MIECZAN, 2007; PAULETO et al., 2009), which is related to their pelagic habit.
In the rainy season, both higher biomass and higher density were observed for species of the orders Gymnostomatida and Prostomatida.