radiolaria - rads_cenozoic - Actinomma medusa

Citation: Actinomma medusa (Ehrenberg 1839)

Basionym: Haliomma medusa (Ehrenberg 1844) Petrushevskaya 1975

Synonyms:
QQ
1844 Haliomma medusa - Ehrenberg p.83
1909 Xyphosphaera apenninica (Vinassa) var. longistylus - Principi p. 6, pl. 1, fig. 12
1971 Actinomma okurai - Nakasenko and Nishimura pl. 1, figs. 3-5
1975 Actinomma medusa (emend. group) - Petrushevskaya pl. 2, figs. 6-8
1990 Actinomma medusa - Abelmann pl. 1, fig. 7

From Suzuki Paleotax db:

1839 Haliomma medusa n. sp. Ehrenberg p. 130
1844 Haliomma medusa Ehrenberg Ehrenberg p. 83
1847 Haliomma medusa Ehrenberg Ehrenberg p. 43
1847 Haliomma medusa Ehrenberg Ehrenberg p. 48
1854 Haliomma medusa Ehrenberg Ehrenberg pl. 20-I, fig. 21
1854 Haliomma medusa Ehrenberg Ehrenberg pl. 20-I, fig. 23
1854 Haliomma medusa Ehrenberg Ehrenberg pl. 21, fig. 53
1854 Haliomma medusa Ehrenberg Ehrenberg pl. 22, figs 33, 34a, 34b
1858 Haliomma medusa Ehrenberg Ehrenberg p. 549
1861 Haliomma medusa Ehrenberg Ehrenberg p. 823
1862 Actinomma medusa (Ehrenberg) Haeckel p. 444
1862 Haliomma medusa Ehrenberg Ehrenberg table
1873 Haliomma medusa Ehrenberg Ehrenberg p. 145, 149, 159, 206, 294-295, table 1b
1876 Haliomma medusa Ehrenberg Ehrenberg p. 74-75, pl. 26, fig. 6
1880 Actinomma medusa (Ehrenberg) Stöhr p. 90, pl. 2, fig. 3
1887 Thecosphaera (Thecosphaerella) medusa (Ehrenberg) Haeckel p. 80
1892 Haliomma medusa Ehrenberg Corti p. 9-10
1975 Actinomma medusa (Ehrenberg) group. emend. Petrushevskaya p. 568, pl. 2, figs. 6-8
1975 Actinomma medusa (Ehrenberg) subsp. beta Petrushevskaya p. 568, pl. 2, fig. 10
1978 Hexacontium medusa (Ehrenberg) Dumitrica p. 236, pl. 5, figs. 5, 6
1990 Actinomma medusa (Ehrenberg) Petrushevskaya Abelmann p. 690-691, pl. 1, fig. 6
2005 Actinomma medusa subsp. beta (Ehrenberg) Funakawa & Nishi pl. 1, figs. 1a, 1b
2009 Haliomma medusa Ehrenberg [the Ehrenberg collection] Suzuki et al. pl. 39, figs. 5a, 5b
2009 Haliomma medusa Ehrenberg [the Ehrenberg collection] Suzuki et al. pl. 1, figs. 3a-3d
2009 Haliomma medusa Ehrenberg [the Ehrenberg collection] Suzuki et al. pl. 24, figs. 5a, 5b
2009 Haliomma medusa Ehrenberg [the Ehrenberg collection] Suzuki et al. pl. 4, figs. 4a, 4b
2009 Haliomma medusa Ehrenberg [the Ehrenberg collection] Suzuki et al. pl. 4, figs. 6a-6c
2009 Haliomma medusa Ehrenberg [the Ehrenberg collection] Suzuki et al. pl. 5, figs. 3a-3b
2009 Haliomma medusa Ehrenberg [the Ehrenberg collection] Suzuki et al. pl. 6, figs. 3a-3b
2013 Actinomma medusa (Ehrenberg) Kochhann et al. p. 534, 536, pl. 1, fig. K
2017 Actinomma medusa (Ehrenberg) group Chen et al. p. 114, pl. 21, figs. 1, 2
2017 Haliommetta medusa (Ehrenberg) Chen et al. p. 110, pl. 16, fig. 1

Taxonomic discussion: (Ehrenberg) 1844 p.83; 1854 pl.22 fig.33 as Haliomma; Petrushevskaya 1975 p.568; Abelmann 1990 (ODP 113 SR) p 690 pl 1 fig 6

Original description: articulis extus non discretis, forma hemisphaerica Medusae
[Segments not distinctly expressed; hemispherical form of a medusa (Translation from Latin by E.M.R. and W.R.R.)]

Description

Ehrenberg 1844 - Haliomma medusa

differt radiis internis 4 interdum parumper exsertis. [Haliomma aequorea: H. forma superficie integra hemisphaerica poris magnis perforata radiis internis 6 non exsertis. Diam. 1/34 . Caltanisetta.(Ehrenberg, 1844; p.83)]

Petrushevskaya 1975 - Haliomma medusa

(p. 568): Shell ratio is 1:30:10, however, the two inner shells are often destroyed. The third shell is of an irregular shape, thick-walled. Pores of different size and irregular outline, with about 12 pores on the half of the equator. Outside spines are nearly cylindrical, variable length and strength. Not all the spines connecting the second and third shells project outwards. About 8-11 spines; often only four or two are pronounced. Very variable species. Some forms of the species likely gave rise to neat spherical forms. Others, with an irregular surface and a reduced number of the outer spines, look very similar to some Axoprunum species.

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"

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

Ehrenberg, C. G. (1839). Uber die Bilding der Kreidefelsen und des Kreidemergels durch unsichtibare Organismen. Abhandlungen der Koniglichen Akademie der Wissenschaften zu Berlin. 1838: 59-147. gs O

Ehrenberg, C. G. (1844e). Uber 2 neue Lager von Gebirgsmassen aus Infusorien als Meeres-Absatz in Nord-Amerika und eine Vergleichung derselben mit den organischen Kreide-Gebilden in Europa und Afrika. Bericht uber die zu Bekanntmachung geeigneten Verhandlungen der Koniglichen Preussische Akademie der Wissenschaften zu Berlin. 1844: 57-97. gs

Petrushevskaya, M. G. (1975a). Cenozoic radiolarians of the Antarctic, Leg 29, DSDP. Initial Reports of the Deep Sea Drilling Project. 29: 541-675. gs O

Principi, P (1909). Cotributo sllo studio dei Radiolari Miocenici Italiani. Bollettino della Societa Geologica Italiana. 28: 1-22. gs O

Missing or ambiguous references: Nakasenko & Nishimura 1971; ;

Actinomma medusa

Taxonomy

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

References:

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