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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Cyttarocylis

Cyttarocylis Fol, 1881

[ref. ID; 3597]
Lorica baggy or subconical, consisting of a collar and a bowl; oral margin entire or denticulate; collar usually forming a low truncated funnel with an inner shelf and a nuchal constriction; bowl rotund or convex conical; aboral end rounded, pointed, slightly elevated, or with a short horn; wall composed of separated laminae with a distinct reticulation of numerous polygons varying in size. (ref. ID; 3597)
  1. Cyttarocylis acutiformis Kofoid & Campbell (ref. ID; 3597)
  2. Cyttarocylis brandti Kofoid & Campbell (ref. ID; 3597)
  3. Cyttarocylis cassis (Haeckel) (ref. ID; 3597)
  4. Cyttarocylis denticulata Daday, 1887
    See; Parafavella denticulata (ref. ID; 3607)
  5. Cyttarocylis denticulata var. beta cylindrica forma ventricosa Jorgensen, 1899
    See; Parafavella ventricosa (ref. ID; 3606)
  6. Cyttarocylis denticulata var. elongata Jorgensen, 1901
    See; Parafavella gigantea (ref. ID; 3607)
  7. Cyttarocylis denticulata var. gamma subrotundata Jorgensen, 1899
    See; Parafavella subrotundata (ref. ID; 3606, 3607)
  8. Cyttarocylis denticulata var. gigantea Cleve, 1899
    See; Parafavella gigantea (ref. ID; 3607)
  9. Cyttarocylis denticulata var. subrotundata Jorgensen, 1901
    See; Parafavella subrotundata (ref. ID; 3607)
  10. Cyttarocylis denticulata var. typica Jorgensen, 1901
    See; Parafavella denticulata (ref. ID; 3607)
  11. Cyttarocylis edentata var. parumdentata Brandt, 1906
    See; Parafavella parumdentata (ref. ID; 3607)
  12. Cyttarocylis ehrenbergii (ref. ID; 191)
  13. Cyttarocylis encecryphalus (ref. ID; 3319)
  14. Cyttarocylis euceryphalus (Haeckel) (ref. ID; 3597)
  15. Cyttarocylis gigantea Brandt, 1896 in part
    See; Parafavella gigantea (ref. ID; 3606, 3607)
  16. Cyttarocylis longa Kofoid & Campbell, 1929
    See; Cyttarocylis brandti (ref. ID; 3597)
  17. Cyttarocylis magna Brandt (ref. ID; 3597, 3606)
  18. Cyttarocylis norvegica Jorgensen, 1899
    See; Acanthostomella norvegica (ref. ID; 3607)
  19. Cyttarocylis norvegica var. minuta Jorgensen, 1901
    See; Acanthostomella norvegica (ref. ID; 3607)
  20. Cyttarocylis plagiostoma (Daday) (ref. ID; 3597)

Cyttarocylis acutiformis Kofoid & Campbell (ref. ID; 3597)

Descriptions

Lorica forming a tall inverted cone, 1.75 oral diameters in length; oral margin irregularly dentate; collar low funnel-shaped (48 degrees), convex outwardly, 0.11 of the total length in height, its basal diameter 0.84 oral diameter; bowl conical, slightly convex; aboral end bluntly pointed; wall reticulated with comparatively minute polygons which are larger near the nuchal constriction. (ref. ID; 3597)

Comments

The species differs from C. magna Brandt in size and the lack of an aboral horn and from C. cassis (Haeckel) in being slender and showing less inflation of the bowl. (ref. ID; 3597)

Measurements

Length 223; oral diameter 127 um. (ref. ID; 3597)

Cyttarocylis brandti Kofoid & Campbell (ref. ID; 3597)

Descriptions

Lorica inverted helmet-shaped, 0.9 oral diameter in length; oral margin irregularly serrated; collar low, abruptly flaring (72-85 degrees), 0.1 of the total length in height, its basal diameter 0.85-0.87 of an oral diameter; bowl bag-like, broadest near the distinct nuchal conjunction; aboral region broadly convex conical (135-142 degrees) with a slight elevation at the aboral end; wall irregularly reticulated, polygons usually becoming smaller towards the distal end. (ref. ID; 3597)

Comments

The species differs from C. euceryphalus (Haeckel) in having an aboral elevation and from C. plagiostoma (Daday) in the more baggy bowl and the rounded aboral end instead of pointed. This form has been separated by Kofoid & Campbell (1929) into two species, C. brandti and C. longa, from a relative degree of bagginess of the lorica and the shape of the aboral end. Notwithstanding a careful comparison with Brandt's figure (1906, P.35, fig.7 and Pl.36, fig.1) on which Kofoid & Campbell's description of these species was based, it was impossible to observe distinct differences between them, and moreover, the bowl and the aboral end are very changeable in shape. Therefore, they have been included under the single species, C. brandti, in this paper. (ref. ID; 3597)

Measurements

Length 95-108; oral diameter 108-120 um. (ref. ID; 3597)

Cyttarocylis magna Brandt (ref. ID; 3597, 3606)

Descriptions

Lorica consisting of a low funnel-shaped collar and a tall inverted conical bowl of angles changing from 15 degrees in the anterior half to 45 degrees in the aboral region, its length 1.8-2.2 oral diameters; oral rim irregularly dentate; collar convex conical (42 degrees), 0.9 oral diameters in transdiameter, 0.06 of the total length in length; aboral horn short, 0.05 of the total length in length; shaped irregularly; wall with a comparatively larger polygonal reticulation. (ref. ID; 3606)

Comments

Differs from Cyttarocylis acutiformis Kofoid & Campbell in the coarsely reticulated wall and in having the marked aboral horn and from C. cassis (Haeckel) in the tall tapering bowl. (ref. ID; 3606)

Measurements

Length 300 um; oral diameter 150 um. (ref. ID; 3606)