Q. variabilis, Naardermeer

Quadrulella variabilis Kosakyan et al., 2016

Description. Test ovoid or pyriform, with a rounded posterior end, laterally compressed towards the pseudostome, very similar to that in Q. symmetrica, sometimes with an elongated neck. Test colorless, composed of square plates, regularly arranged in rows. The plates are smaller near the aperture (3-4 µm), then gradually become larger (up to 7-9 µm ) toward the posterior end of the test. Aperture often curved and bordered by a thin organic lip.

Dimensions: Length: 66-69 (96) µm, breadth: 35-40.5 (45) µm . Aperture 17- 18.5 µm wide (n=7). My measurements: L 71 µm, aperture 17 µm wide, plates 3.4-9.4 µm.

Ecology: Sphagnum mosses, Switzerland.

Remarks: The species has members with a variable neck length. The records from one location suggest rather a species complex than distinct intraspecific diversity.

Recent posts

Cryptodifflugia collum

Cryptodifflugia collum, after Chardez, 1971 Cryptodifflugia collum  (Chardez, 1971) Bobrov et Mazei, 2017 Difflugiella collum Chardez, 1971 Diagnosis: Shell globose, transparent, hyaline, chitinous, aperture topped

Read More »

Cryptodifflugia brevicolla

Cryptodifflugia brevicolla, after Golemansky, 1979 Cryptodifflugia brevicolla  Golemansky, 1979 Diagnosis: Shell ovate, laterally compressed, with clearly expressed chitinous collar around an aperture, neck circular in

Read More »

Cryptodifflugia bassini

Cryptodifflugia bassini, after Bobrov, 2001 Cryptodifflugia bassini  Bobrov, 2001 Diagnosis: Shell small, axially symmetrical, circular in transverse section, flattened in longitudinal section, widely elliptical. Aperture

Read More »

Cryptodifflugia apiculata

Cryptodifflugia apiculata, after Cash, 1904 Cryptodifflugia apiculata  (Cash, 1904) Page, 1966 Difflugiella apiculata  Cash, 1904 Diagnosis: Shell ovoid, not compressed laterally, chitinous, smooth, transparent, colorless,

Read More »

Cryptodifflugia angusta

Cryptodifflugia angusta, after Schönborn, 1965 Cryptodifflugia angusta  (Schönborn, 1965) Page, 1966 Difflugiella angusta  Schönborn, 1965 Diagnosis: Shell small, organic, elongated-ovate, not transparent, yellow-brown, covered with

Read More »

Cryptodifflugia angulata

Cryptodifflugia angulata, after Playfair Cryptodifflugia angulata Playfair, 1917 Diagnosis: Shell small, oval, transparent, lateral sides flattened, fundus rounded-conic, widest shell part in the middle, lateral

Read More »