radiolaria - rads_cat - Larcopyle eccentricum radiolaria - rads_cat - Larcopyle eccentricum

CATALOG OF ORIGINAL DESCRIPTIONS: Larcopyle eccentricum 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 eccentricum
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 eccentricum

Citation: Larcopyle eccentricum Lazarus et al. 2005
taxonomic rank: species
Described on page(s) : 111
Type specimens: Holotype Plate 6, figs 1–3
Type sample (& lithostrat): 689B-6H-1, 59–61 cm
Type age (chronostrat): Middle Miocene
Type locality: ODP Site 689, Weddell Sea
Type repository: Museum für Naturkunde, Mikropaläontologie No. ECO-19

Current identification/main database link: Larcopyle eccentricum Lazarus et al. 2005


Original Description

The shell is elongate egg-shaped and about 120 μm long. The interior of the shell is usually empty, although a delicate set of widely spaced elongated medullary shells can be seen in some specimens. A well-developed pylome with teeth is visible at one pole, which often forms a tube-like structure. The medium-sized pores are circular and rather regularly arranged. They are surrounded by weak frames. The surface varies from smooth to somewhat thorny due to variably developed pore frames. The outer shell wall is rather thin.


Etymology:
The name refers to the slightly asymmetric ellipsoidal shape of the shell.

Extra details from original publication

Occurrence. Early Miocene–Mid Miocene, scattered, rare questionable occurrences to the Early Pliocene.

Remarks. Differs from Cenolarcopyle fragilis Tan, 1927 (described from tropical sediments of uncertain Tertiary age), despite a superficial similarity in overall shell shape, in that, according to Tan Sin Hok’s description, C. fragilis has a pylonid (larnacilla) inner shell, irregularly distributed pores on the cortical shell and is significantly smaller (length 105 μm).

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


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Larcopyle eccentricum compiled by the radiolaria@mikrotax project team viewed: 21-4-2024

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