Lithocarpium monikae Petrushevskaya 1975.jpg
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Lithocarpium monikae Petrushevskaya 1975.jpg<% linkedspecs %>
Current identification/main database link: Prunopyle monikae (Petrushevskaya 1975)
Original Description
Outer gown with meshes 5-10µm in diameter. The diameter of entire skeleton about 150-250µm. The central mass (or spiral?) looks very similar to that in L. fragilis although L. monikae differs from L. fragilis. The latter have no pronounced radial spines (or rods), and the space between the central mass and the outer gown in L. fragilis is filled with irregular meshes (Plate 4, Figures 3, 4). In L. monikae the construction is similar to that in Rhizosphaeridae: there are radial spines connecting central mass and external layer. Distinguishing characters (rw): L. monikae differs from Rhizosphaerids by having another external shell (or gown) with pylom. L. monikae resembles Plegmosphaera maxima Haeckel by the thin outer skeletal layer (the difference is the absence of the internal mass in P. maxima). In the same way L. fragilis is similar to Plegmosphaera exodictyon Haeckel (1887, pl. 18, fig. 8). They have a nearly identical thick peripheral skeleton composed of irregular meshes (the difference is the absence of the internal mass in P. exodictyon). It is difficult to say if there is real connection between Lithocarpium species and Plegmosphaerids. L. monikae differs from L. titan by having a thinner, less regular, even spongy outer surface of the skeleton, and straight radial spines.
Etymology: The species is named after Monique Cachon-Enjumet in acknowledgment of her great contribution to the knowledge of radiolarian euplasmatic structures.
Editors' Notes
Description is based on 26 specimens.
Petrushevskaya, M. G. (1975a). Cenozoic radiolarians of the Antarctic, Leg 29, DSDP. Initial Reports of the Deep Sea Drilling Project. 29: 541-675. gsReferences:
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Lithocarpium monikae compiled by the radiolaria@mikrotax project team viewed: 23-4-2021
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