Amphisiella Gourret & Roeser, 1888

[ref. ID; 2014]
Elongate, oval body, dorso-ventrally flattened, dorsal surface convex with several longitudinal rows of cilia. Flattened ventral surface bearing 2 rows of marginal cirri, 1 row of ventral cirri, transverse cirri and a patch of distinct frontal cirri, the anterior most of which are sometimes enlarged. There are usually 2 macronuclei but sometimes numerous. AZM short, restricted to anterior body quarter. Several species have been described.
Quote; Colin R. Curds, Michael A. Gates and David McL. Roberts "British and other freshwater ciliated protozoa Part II Ciliophora: Oligohymenophora and Polyhymenophora" Cambridge University Press, 1983 (ref. ID; 2014)

[ref. ID; 2129]
The oral primordium originates in close contact with the ACR. The ACR commences anlagen formation within-row and originates from two rightmost anlagen. All dorsal kineties develop intrakinetally. More than one cirrus left of ACR. Transverse cirri obliquely arranged, originate from more than one anlage. Caudal cirri lacking. (ref. ID; 2129)

[ref. ID; 3925]
Amphisiella contains 7 species, with A. marioni as type by monotypy. The interphase structure and fronto-buccal field in this species are characterized by the absence of midventral cirri and urostylid-like development of the frontal ciliature. Rather, the pattern is more similar to Oxytricha, Stylonychia, and other member in the Oxytrichidae. (ref. ID; 3925)

Amphisiella faurei Dragesco, 1963 (ref. ID; 2316)
Description; Body elongate, 178 um long with pronounced 'head' region. Well developed marginal cirri present and an extensive series of up to 12 transverse cirri from the posterior which frequently appeared spatulate. Absence of concretement vacuole distinguished this species from A. lithophora Faure-Fremiet, 1954 (ref. ID; 2316)
Amphisiella lithophora Faure-Fremiet, 1954 (ref. ID; 1618)
Description; Anterior end constricted; with a concretion vacuole; salt water. (ref. ID; 1618)
Measurements; 120-135 by 26-31 um. (ref. ID; 1618)
Amphisiella oscensis Fernandez-Leborans, 1984 (ref. ID; 4695)
Description; [Paroral formation] In this species, the paroral formation is composed of two parts: paroral formation 1 (PF 1) and paroral formation 2 (PF 2). Paroral formation 1 is usually displaced toward the anterior pole of the ciliate with respect to paroral formation 2. PF 1 measures 17.6 um (avg.) in length, and has a slightly curved arrangement, encircling the right-and side of the oral area. It is composed of two parts: 1) an anterior segment, measuring 13 um (avg.) in length and composed of 2 parallel rows of 40-42 kinetosomes each; b) a posterior segment, measuring 4.6 um (avg.) in length and composed of 16 kinetosomes in zig-zag arrangement which constitute a haplokinety. PF 2 is more or less parallel to PF 1 and located to the right of it. It measures 16.2 um (avg.) in length. It is composed of two parts: a) an anterior segment, forming more or less the anterior third of PF 2 and composed of two parallel rows of 22-24 pairs of kinetosome each; b) a posterior part, forming more or less the posterior two-thirds of PF 2 and composed of 3 kineties, each possessing 36-38 kinetosomes. There three kineties become more separated from each other toward the posterior end of PF 2. Only fibres dependent on paroral formation 1 have been observed. PF 1 has a fibre which accompanies it in its full length, called the subparoral fibre (SPF). A whole set of numerous narrower parallel fibres lead out from SPF toward the membranelle area, occupying a considerable part of the oral surface. These are called suboral fibres (SOF) (Fernandez-Leborans, 1984). (ref. ID; 4695)
Amphisiella terricola Gellert, 1955 (ref. ID; 2129) reported author and year? (ref. ID; 191)
Description; This species develops the oral primordium apokinetally and the new ACR possibly from a single anlage within the parental ACR. This pattern is quite similar to that of Orthoamphisella Eigner and Foissner, 1991, which lacks, however, transverse cirri. Thus, a proper classification of A. terricola must await more detailed investigations. (ref. ID; 2129)
Amphisiella thiophaga Kahl, 1928 (ref. ID; 1621) reported year? (ref. ID; 1618)
Description; In salt water. (ref. ID; 1618)
Measurements; 70-100 um long. (ref. ID; 1618)