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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Netzelia

Netzelia Ogden, 1979 (ref. ID; 2290 original paper)

[ref. ID; 2290]
Shell colourless, ovoid, symmetrical, with a broad crown and sides tapering smoothly to the aperture, composed of idiosomes but may incorporate grains of quartz; aperture circular, with organic collar and often with four or five small lobes. (ref. ID; 2290)

[ref. ID; 4245]
The genus Netzelia was created by Ogden, 1979 (see: ref. ID; 2290) to clarify the composition of the genus Difflugia by transferring from it all of those organisms that produce their own siliceous test particles (idiosomes) to a separate genus, Netzelia. Thus, the genus Difflugia contains those species that use only collected particles in building their test while Netzelia includes those species capable of synthesizing particles. (ref. ID; 4245)
  1. Netzelia labeosa Beyens & Chardez, 1997 (ref. ID; 2818 original paper)
  2. Netzelia oviformis (Cash, 1909) Ogden, 1979 (ref. ID; 722, 2290 redescribed paper) reported year? (ref. ID; 2818)
  3. Netzelia tuberculata (Wallich, 1864) (ref. ID; 1986) reported year? (ref. ID; 4771), (Wallich) Netzel (ref. ID; 4776) or (Wallich, 1964) Ogden, 1979 (ref. ID; 7770) reported author and year? (ref. ID; 722, 3643, 4245)

Netzelia labeosa Beyens & Chardez, 1997 (ref. ID; 2818 original paper)

Descriptions

The shell is ovoid, in cross-section circular. The circular aperture is formed by a refolding of the shell-wall, featuring thus a lip-like short collar. The shell wall is coated with irregular platelets, vermicular elements, and reworked diatom valves, all embedded in a dense organic layer, which is transparent with a yellowish to brownish tint. This new species is characterised by the remarkable structure of the region near the aperture. (ref. ID; 2818)

Measurements

Length of shell 118-125; shell diameter 82-90; aperture diameter 26-29; height of collar 5-7 um (n=14). (ref. ID; 2818)

Netzelia oviformis (Cash, 1909) Ogden, 1979 (ref. ID; 722, 2290 redescribed paper) reported year? (ref. ID; 2818)

Descriptions

This species has a lobate aperture. (ref. ID; 2818)