radiolaria - rads_cat - Larcopyle polyacantha amplissima radiolaria - rads_cat - Larcopyle polyacantha amplissima

CATALOG OF ORIGINAL DESCRIPTIONS: Larcopyle polyacantha subsp. amplissima Lazarus et al. (2005)

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 -> L -> Larcopyle -> Larcopyle polyacantha amplissima
Other pages this level: L. augusti, L. bucerum, L. buetschli chenmuhongi, L. buetschlii, L. buetschlii orion, L. drieschii, L. eccentricanoides, L. eccentricum, L. faustae, L. hayesi hayesi, L. hayesi irregularis, L. herbstii, L. labyrinthusa, L. molle, L. nebulum, L. peregrinator, L. polyacantha amplissima, L. polyacantha titan, L. pulchella, L. spongiosa, L. weddellium

Larcopyle polyacantha amplissima

Citation: Larcopyle polyacantha subsp. amplissima Lazarus et al. (2005)
taxonomic rank: sub-species
Described on page(s) : 108
Type specimens: Plate 4, figs 6, 7
Type sample (& lithostrat): 751A-12-1,98 #1
Type age (chronostrat): Middle Miocene
Type locality: ODP Site 751, Southern Ocean
Type repository: Museum für Naturkunde, Mikropaläontologie No. ECO-17

Current identification/main database link: Larcopyle polyacantha subsp. amplissima Lazarus et al. (2005)

Original Description

The sub-cylindrical to elliptical cortical shell is about 170 μm long and bears spines on each pole. The inner whorls of the shell are connected only loosely to the cortical shell and frequently are broken free of it, so the central disc can change its position and can be found near a pole. The outer wall is pierced by small- to medium- sized, irregularly arranged pores, which often lack frames. The inner whorls may be single or double, in some specimens the outer (cortical) whorls include incomplete polar caps. A well-developed pylome is present in most specimens.

The name is from the latin word amplus for splendid, wonderful.

Extra details from original publication

Occurrence. Early–Mid Miocene, questionable occurrences in Late Miocene.

Remarks. L. p. amplissima is very close to L. p. polyacantha and transitional specimens can be found. It can be distinguished from L. p. polyacantha by the more quadrate, less regular shape of the shell and more evolute whorls.


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 polyacantha amplissima compiled by the radiolaria@mikrotax project team viewed: 21-4-2024

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