Actinomma pachyderma Haeckel 1887.jpg
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Actinomma pachyderma Haeckel 1887.jpg<% linkedspecs %>
Current identification:
Original Description
Cortical shell very thick walled, with regular, circular, double-edged pores, twice as broad as the bars. Both medullary shells with simple, small, circular pores, of the same breadth as the bars. Radial proportion of the three spheres = 1: 2: 4; radial spines about twenty, conical, shorter than the radius, prolonged inside into twenty very thin connecting beams (fig. 4).
Diameter of the outer shell 80µm, middle 40µm, inner 20µm; cortical pores 10µm bars 5µm; length of the spines 30µm, basal breadth 10µm.
Editors' Notes
Haeckel listed Actinomma pachyderma under the subgeneric name Actinommetta, but did not include the subgeneric name in the species name.
[presumably Quaternary, though at least one form (Lithochytris lucerna) reported from this station appears to be Eocene - Riedel and Sanfilippo, 1970, p.506, 528]]
Haeckel, E (1887). Report on the Radiolaria collected by H.M.S. Challenger during the years 1873-1876. Report on the Scientific Results of the Voyage of H.M.S. Challenger during the year 1873-1876, Zoology. 18: 1-1803. gsReferences:
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Actinomma pachyderma compiled by the radiolaria@mikrotax project team viewed: 20-4-2021
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