Psychospyris parva

Classification: rads_cenozoic -> Trissocyclidae -> Acanthodesmiidae -> Psychospyris -> Psychospyris parva
Sister taxa: P. grandis, P. intermedia, P. parva, P. sp.


Citation: Psychospyris parva Riedel & Sanfilippo 1971
Rank: species
Basionym: Psychospyris parva

Catalog entries: Psychospyris parva

Original description: Bilobed cephalis of the usual acanthodesmiid form, its outline marked by an almost complete frontal ring. Anterior and posterior faces of this cephalic shell very delicate, with small subcircular pores. In the frontal plane, surrounding the cephalic shell, is a more robustly developed zone of chambered structure, which may be kidney-shaped, elliptical or circular in outline. The cephalic cavity is generally about a third to a half as wide as the total width of the skeleton.

(Based on 9 specimens) Width of cephalic cavity 130 to 170µm; height of sagittal ring 65 to 80µm; greatest diameter of total skeleton 205 to 365µm. Distinguishing characters (rw): This species is distinguished from Psychopyris inrermedia by the smaller cephalic cavity.


Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within Neogene Period (2.59-23.03Ma, top in Piacenzian stage). Data source: Lazarus et al. 2015 - "N age group"
First occurrence (base): within Neogene Period (2.59-23.03Ma, base in Aquitanian stage). Data source: Lazarus et al. 2015 - "N age group"

Plot of occurrence data:



Psychospyris parva compiled by the radiolaria@mikrotax project team viewed: 31-10-2020

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