radiolaria - rads_cat - Larcopyle weddellium radiolaria - rads_cat - Larcopyle weddellium

CATALOG OF ORIGINAL DESCRIPTIONS: Larcopyle weddellium 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 weddellium
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 weddellium

Citation: Larcopyle weddellium Lazarus et al. 2005
taxonomic rank: species
Described on page(s) : 117, 119
Type specimens: Plate 10, figs 1, 2
Type sample (& lithostrat): 745B-10-2,53
Type age (chronostrat): Pleistocene
Type locality: ODP Site 745, Southern Ocean
Type repository: Museum für Naturkunde, Mikropaläontologie No. ECO-22

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


Original Description

The small shell (about 110 μm) has a rather asymmetrical, ellipsoidal shape. The large pores are arranged close together, frames are absent in most specimens. A double spiral with closely spaced whorls gives the shell a compact appearance. Characteristically there are distinct caps on one or both poles and the whorls are not completely smooth, but have sharper bends and flattened regions. A wide pylome, often with teeth or a cluster of short spines, is usually present.


Etymology:
The species is named after the Weddell Sea, where this morphotype was first encountered

Extra details from original publication

Occurrence. Late Miocene–Pleistocene, scattered occurrences in the Mid Miocene.

Remarks. Larcopyle weddellium is superficially similar to Lithelius minor Jörgensen, 1900, and/or similar lithelid forms, such as Lithelius spiralis Haeckel, 1887, in that all of these forms are built of compact spiral whorls of lattice shell. L. weddellium, however, is consistently ellipsoidal, has somewhat angular whorls, frequently has partially formed whorls at the pole ends of the shell and appears to possess a pylome, as indicated by the weakly expressed cluster of short spines or teeth at one end of the ellipsoidal shell. Larcopyle weddellium is also similar to incomplete specimens of Larcopyle pylomaticus n. comb., but can be distinguished by the characteristically asymmetrical shape of the shell – which is absent in L. pylomaticus – and its larger pores. The specimens illustrated by Nigrini & Lombari (1984) appear to be conspecific with L. weddellium described here, but they will not be formally synonymized without the actual material being examined.

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 weddellium compiled by the radiolaria@mikrotax project team viewed: 20-6-2024

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