radiolaria - rads_cenozoic - Lychnocanium conicum

radiolaria - rads_cenozoic - Lychnocanium conicum radiolaria - rads_cenozoic - Lychnocanium conicum

Lychnocanium conicum

Classification: rads_cenozoic -> Theoperidae -> Lychnocaniidae -> Lychnocanium -> Lychnocanium conicum
Sister taxa: L. carinatum, L. conicum, L. continuum, L. grande, L. hirundo, L. neptunei, L. tetrapodium, L. tridentatum, L. waiareka, L. sp.

rad_org Lychnocanoma conica img1112.jpg
rad_org Lychnocanoma conica img1428.jpg
rad_org Lychnocanoma conica img1429.jpg
rad_org Lychnocanoma conica img2400.jpg
rad_org Lychnocanoma conica img2401.jpg

Taxonomy

Citation: Lychnocanium conicum Clark & Campbell 1942

Taxonomic rank: species

Basionym: Lychnocanium conicum

Synonyms:
1942 Lychnocanium conicum - Clark and Campbell p. 71, pl. 9, fig. 38
1975 Lychnocanella conica - Petrushevskaya p. 583, pl. 12, figs. 2,11-15
1976 Lychnocanoma sphaerothorax - Weaver p. 581, pl. 5, figs. 4,5
1990 Lychnocanoma conica - Abelmann pl. 6, fig. 8; pl. 7, figs. 1A,B

From Suzuki Paleotax db:

1942 Lychnocanium (Lynchnocanella) conicum n. sp. [sic] Clark & Campbell p. 71, pl. 9, fig. 38
1975 Lychnocanella conica (Clark et Campbell) Petrushevskaya p. 583, pl. 12, figs. 2, 11-15
1979 Lychnocanium conicum Clark et Campbell Gorbunov p. 143-144, pl. 14, fig. 3a, 3b
1988 Lychnocanium conicum Clark & Campbell Blueford p. 246
1990 Lychnocanoma conica (Clark & Campbell) Abelmann p. 697, pl. 6, fig. 8, pl. 7, figs. 1A, 1B
1992 Lychnocanoma conica (Clark & Campbell) Sugiyama & Furutani p. 210, pl. 14, fig. 9
1992 Lychnocanoma conica (Clark & Campbell) Takemura p. 747, pl. 2, figs. 13, 14
1995 Lychnocanium conicum Clark & Campbell Shilov p. 126, pl. 2, fig. 1
1997 Lychnocanoma conicum (Clark & Campbell) Takemura & Ling pl. 1, fig. 20
2005 Lychnocanium conicum Clark & Campbell Bak & Barwiczp. 149, fig. 5O
2005 Lychnocanoma conica (Clark et Campbell) Funakawa & Nishi pl. 4, figs. 15a, 15b
2013 Lychnocanoma conica (Clark & Campbell) Kochhann et al. p. 541, pl. 3, figs. C, D
2017 Lychnocanium conicum Clark & Campbell Chen et al. p. 196, pl 69, fig 3

Taxonomic discussion: Clark and Campbell, 1942, p.71, pl.9, fig.38 ; Abelman (1990)

Catalog entries: Lychnocanium conicum

Type images:

type material: L. conicum

Original description: Shell broadly conical; apical horn conical, circular in section, probably elongate; cephalis conical with very strongly convex sides, its basal diameter about equal to the altitude, collar distinct, chiefly separated from the thorax by a change in contour rather than by sharp stricture; thorax asymmetrically truncate-conical with strongly convex sides which reach the greatest diameter well below the middle and just above the level of the origin of the feet, thence the sides contracting rapidly to the flattened apertural face; feet, three in number, equal, equidistant, with slightly expanded and reticulated bases (the legs all broken in the writers' specimens); wall thick, dense; surface of horn, hyaline; of cephalis, smooth and hyaline and without pores; of thorax, with strong subhexagonal, concave areas the angles of which hexagons bear stubby, broad, and blunted sepaloid points so that the surface is rough, a subcircular pore in the center of each of the areas, pores uniform, subregularly in more or less vertical rows; framework rather heavy; aperture small, inconspicuous.
Remarks on original description: [The authors here questionably list this species under the subgeneric name Lychnocanella and include the subgeneric name in the species name.
New name Lychnocanella conica (Clark and Campbell) Petrushevskaya, 1975c]

Description

Published descriptions
Abelmann 1990 - Lychnocanium conicum
Similar to Lychnocanoma sp. A, but smaller in size with a larger cephalis in comparison to the thorax, which is more separated. Cephalis with scattered small circular pores, bearing a conical apical horn of approximately the same length as the cephalis. Thorax with hexagonally framed circular to subcircularpores arranged in longitudinal rows. Three short stout three-bladed feet, slightly divergent.
Remarks: This species can be distinguished from Lychnocanoma sp. A by its smaller size, its larger and more separated cephalis, the longer and pronounced feet, the smoother surfaceof the shell, and the longitudinal rows ofpores.

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within Paleogene Period (23.03-66.04Ma, top in Chattian stage). Data source: Lazarus et al. 2015 - "P age group"
First occurrence (base): within Paleogene Period (23.03-66.04Ma, base in Danian stage). Data source: Lazarus et al. 2015 - "P age group"

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.
Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
Taxon plotted: Lychnocanium conicum, synonyms included - Lychnocanella conica; Lychnocanella conica (small); Lychnocanella conica bekoma; Lychnocanium conicum; Lychnocanoma conica; Lychnocanoma sphaerothorax; Lychnocanomma conica; Lynchnocanella conica; Lynchnocanella conica (small); Lynchnocanella conica bekoma; Lychnocanella conicum;
See also space-time plot :: Samples map :: Parent: Lychnocanium

References:
Abelmann, A. (1990). Oligocene to Middle Miocene radiolarian stratigraphy of southern high latitudes from Leg 113, Sites 689 and 690, Maud Rise. Proceedings of the Ocean Drilling Program, Scientific Results. 113: 675-708. gs
Clark, B. L. & Campbell, A. S. (1942a). Eocene radiolarian faunas from the Mt. Diablo area, California. Geological Society of America, Special Papers. 39: 1-112. gs
Weaver, F. M. (1976). Antarctic Radiolaria from the southeast Pacific basin, Deep Sea Drilling Project, Leg 35. Initial Reports of the Deep Sea Drilling Project. 35: 569-603. gs
Missing or ambiguous references: Clark & Campbell 1942; ;

Lychnocanium conicum compiled by the radiolaria@mikrotax project team viewed: 22-7-2026

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