Ravdotodiskolithos parvus
Set number: 1409
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Set number: 1408
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In mobile mount
Set number: 1407
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In mobile mount
Set number: 1406
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In mobile mount
Set number: 1405
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Set number: 1404
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Cyclicargolithus parvus Shamrock & Watkins, 2012
Ravdotodiskolithos parvus is a small (<5.0 μm) species with several distinctive features. It possesses equal-sized distal and proximal shields that are distinctly striated, with 20-32 segments. These shields are non-concave-convex in shape. A slightly protruding, narrow tube cycle surrounds a very narrow central opening. These morphological traits are critical for identifying and distinguishing Ravdotodiskolithos parvus.
Its optical properties, including inclined dextrogyre extinction lines and length-fast (-) elongation, are consistent with those of the genus Ravdotodiskolithos.
Shamrock, J. L., Watkins, D. K., 2012. Eocene calcareous nannofossil biostratigraphy and community structure from Exmouth Plateau, Eastern Indian Ocean (ODP Site 762). Stratigraphy 9(1), 1-11
Varol, O. 2025a. A practical guide to optical studies of calcareous nannofossils. Grzybowski Foundation Special Publication. 29: 1-222
Holotype
Cyclicargolithus parvus
Shamrock & Watkins, 2012
Early Eocene
ODP Leg 122 Site 762C, Exmouth Plateau, NW Australia, Indian Ocean