Citation: Larcopyle augusti Lazarus et al. 2005taxonomic rank: speciesBasionym: Larcopyle augustiSynonyms: 2005 Larcopyle augusti - Lazarus et al. p.113; pl. 8; figs. 1-13
From Suzuki Paleotax db:
2005 Larcopyle augusti n. sp. Lazarus et al. p. 113, 114, pl. 8, figs. 1-13 2017 Larcopyle augusti Lazarus et al. Chen et al. p. 149, pl. 43, figs. 9, 10
Original description: The subcylindrical skeleton is about 150 μm long. There is an unusually large distance between the outer wall and the central layers of the shell. In many specimens the outer wall is absent, either due to breakage or incomplete development. The central shell shows caps, which are arranged one on top of the other, so the shell looks like a biconcave lens in cross- section. The thin outer wall is perforated by large circular pores of irregular size, which lack frames. It is connected with the central shell by long spines. A pylome is not obvious. Late Miocene specimens become more spongy.
Description
Published descriptions
Lazarus et al. 2005 - Larcopyle augusti
Derivation of name: In reference to the extended external shell or mantle, which gives this form a majestic dignity or grandeur (Webster's New Collegiate Dictionary).
Holotype: Plate 8, figs 1, 2; 751A-9-5,98 #1 (Late Miocene, Kerguelen). Museum für Naturkunde, Mikropaläontologie No. ECO-21.
Description: The sub-cylindrical skeleton is about 150 µm long. There is an unusually large distance between the outer wall and the central layers of the shell. In many specimens the outer wall is absent, either due to breakage or incomplete development. The central shell shows caps, which are arranged one on top of the other, so the shell looks like a biconcave lens in cross- section. The thin outer wall is perforated by large circular pores of irregular size, which lack frames. It is connected with the central shell by long spines. A pylome is not obvious. Late Miocene specimens become more spongy.
Occurrence: Middle Miocene Late Miocene.
Remarks: As noted under L. pylomaticus, L. augusti appears to evolve into L. pylomaticus in the Late Miocene. Transitional forms are noted separately in the range chart (Table 1).
Biogeography and Palaeobiology
Biostratigraphic distribution
Geological Range: Last occurrence (top): within Late Miocene Sub-Epoch (5.33-11.62Ma, top in Messinian stage). Data source: Lazarus et al. 2005 First occurrence (base): within Middle Miocene Sub-Epoch (11.62-15.97Ma, base in Langhian stage). Data source: Lazarus et al. 2005
Plot of occurrence data:
Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested
(NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Larcopyle
References:
Lazarus, D., Faust, K. & Popova-Goll, I. (2005). New species of prunoid radiolarians from the Antarctic Neogene. Journal of Micropalaeontology. 24(2): 97-121. gs
Larcopyle augusti compiled by the radiolaria@mikrotax project teamviewed: 14-12-2024
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