radiolaria - rads_cat - Cromyomma perplexum radiolaria - rads_cat - Cromyomma perplexum

CATALOG OF ORIGINAL DESCRIPTIONS: Cromyomma perplexum Stöhr 1880

This page provides data from the catalog of type descriptions. The catalog is sorted alphabetically. Use the current identification link to go back to the main database.

Higher levels: rads_cat -> C -> Cromyomma -> Cromyomma perplexum
Other pages this level: C. circumtextum, C. macroporum, C. mucronatum, C. perplexum, C. perspicuum, C. riedeli, C. spinulosa, C. tuberculata, C. villosum

Cromyomma perplexum

Citation: Cromyomma perplexum Stöhr 1880
Rank: species
Described on page(s) : p.95
Type specimens: pl.3, fig.5
Type repository: No information given
Family (traditional): Actinommidae

Current identification:

Original Description

Vier durch 8 (?) Radialstäbe verbundene Gitterkugeln, deren Durchmesser sich zu verhalten scheinen wie 1: 2: 3: 4. Durch kurze starke Stacheln, welche die Rindenschale bedecken, wird nämlich diese so dunkel, dass man nur mit Mühe das Innere unterschieden kann. Zwischen je 2 Stacheln liegt ein grosses rundes Gitterloch von 1/10 des Durchmessers der Schale. Zwischenbalken ungefähr 1/3 so breit.
[Four roundish spheres linked by 8 radial beams with diameters as 1: 2: 3: 4. Numerous short stout spines on the cortical shell, inner part of the shell very difficult to observe. Between 2 spines, a big circular pore as large as 1/10 of the cortical shell diameter. Bar breadth approximately 1/3 as large. (Translation from German by J.P.C.)]

Shell diameters 170, 130, 87, 43µm. Length of spines 13µm, basal breadth as large. Pores 13 to 17µm. Bars approximately 7µm.
Very rare.

Editors' Notes
Premature name in Stöhr, 1878 [2713:516]
Dimensions given for shell diameters are not consistent with 1: 2: 3: 4 ratios given in description]


Stöhr, E. (1880). Die Radiolarienfauna der Tripoli von Grotte, Provinz Girgenti in Sicilien. Palaeontographica. 6(4): 71-121. gs V O


Cromyomma perplexum compiled by the radiolaria@mikrotax project team viewed: 29-5-2023

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