radiolaria - rads_cenozoic - Botryostrobus auritus radiolaria - rads_cenozoic - Botryostrobus auritus

Botryostrobus auritus

Classification: rads_cenozoic -> Artostrobiidae -> Botryostrobus -> Botryostrobus auritus
Sister taxa: B. aquilonaris, B. auritus, B. bramlettei, B. hollisi, B. joides, B. kerguelensis, B. miralestensis, B. parsonsae, B. rednosus, B. sp.


Citation: Botryostrobus auritus (Ehrenberg 1844) Nigrini 1977
taxonomic rank: species
Basionym: Lithocampe aurita Ehrenberg 1844
1844 Lithocampe aurita - Ehrenberg p. 84
1844 Lithocampe australe - Ehrenberg p. 187
1854 Eucyrtidium auritum - Ehrenberg pl. 22, fig. 25
1854 Eucyrtidium australe - Ehrenberg pl. 35A, 21, fig. 18
1887 Lithostrobus seriatus - Haeckel p. 1474; pl. 79, fig. 15
1887 Siphocampe caminosa - Haeckel p. 1500; pl. 79, fig. 12
1913 Lithamphora furcaspiculata - Popofsky p. 408-412; text-figs. 131,133-134, 136-137
1966 Siphocampium cf. seriatus - Benson p. 521-523; pl. 35, figs. 12-13
1967 Lithostrobus (?) seriatus - Petrushevskaya p. 145-147; fig. 82
1971 Lithamphora furcaspiculata - Casey pl. 23.3, figs. 9-10
1971 Artostrobium (=Lithostrobus) seriatum - Petrushevskaya fig. 124, VI-VIII
1971 Artostrobium auritum group - Riedel and Sanfilippo p. 1599; pl. 1H, figs. 5-8
1972 Botryostrobus auritus group - Petrushevskaya and Koslova p. 539; pl. 24, figs. 15-18
1972 Botryostrobus australis group - Petrushevskaya and Koslova p. 539-540; pl. 24, figs. 12-14
1973 Artostrobium ex gr. auritum - Dumitrica p. 840; pl. 15, figs. 6-7
1973 Artostrobium auritum group - Kling p. 639; pl. 5, figs. 27-30; pl. 12, figs. 24-27
1974 Artostrobium auritum group - Renz p. 788; pl. 17, fig. 13
1977 Artostrobium auritum - Kling p. 215; pl. 1, fig. 15
1977 Lithostrobus (?) seriatus - Molina-Cruz p. 336; pl. 7, figs. 15-16
1977 Lithostrobus lithobotrys - Molina-Cruz p. 336; pl. 7, fig. 17
1977 Botryostrobus auritus-australis group - Nigrini p. 246-248; pl. 1, figs. 2-5
1979 Botryostrobus auritus-australis group - Kling p. 309; pl. 2, fig. 17
1979 Botryostrobus auritus-australis group - Nigrini and Moore p. N101-N102; pl. 27, figs. 2a-2d
1980 Botryostrobus auritus/australis group - Johnson and Nigrini p. 135; pl. 4, fig. 6
1982 Botryostrobus auritus/australis group - Molina-Cruz p. 996; pl. 4, fig. 5
1983 Botryostrobus auritus-australis group - Benson p. 500
1984 Botryostrobus auritus-australis - Nishimura and Yamauchi p. 64-65; pl. 40, figs. 2-4, 7
1987 Botryostrobus auritus/australis group - Bjørklund and de Ruiter fig. 6, nos. 29-30
1989 Botryostrobus seriatus - Cheng and Yeh p. 186; pl. 8, figs. 1-2
1995 Botryostrobus auritus/australis - van de Paverd p. 254-255; pl. 76, figs. 19-22
1998 Botryostrobus auritus/australis - Boltovskoy fig. 15.168
Taxonomic discussion: Since L. australis was not properly described the correct name for this species is B. auritus [editor's comment - JRY 2019]

Catalog entries: Lithocampe aurita, Lithocampe australis

Original description: L. loricae oblongae apice (anteriore ?) capitato rotundato, corniculis 2--3 aurito, pororum seriebus laxis transversis, articulis 5--6. Long. 1/22"'.
[Lithocampe with elongate shell; apex (anterior?) capitate, rounded, with 2-3 ear-shaped horns; pores in wide transverse rows; segments 5-6. (Translation from Latin by E.M.R. and W.R.R.)]

Length 102.5µm.
Remarks on original description: [New names: Eucyrtidium auritum Ehrenberg, 1847; Botryostrobus auritus-australis (Ehrenberg) group Nigrini 1977]


Published descriptions

Benson 1966 - Lithocampe aurita

Smooth test with 3-6 (generally 4-5) inflated, truncate-conical or campanulate joints below the hemispherical cephalis. Cephalis with six collar pores at its base, a conspicuous, trumpet-like ventral tube, a dorsal lobe, and a short, stout, three-bladed apical spine. Structure of cephalis and collar region the same as in the other species of Siphocampium from the Gulf. Short, indistinct, dorsal and primary lateral thoracic ribs present. Vertical spine extends within the proximal portion of the interior of the ventral tube. Cephalis appears separated from thorax by a distinct stricture in dorsal or ventral view. Pores of cephalis small, circular, infilled with silica in several specimens. Pores of thorax equal, circular, hexagonally arranged in 3-4 transverse rows, separated by wide intervening bars. Constrictions between joints deep, coincident with broad hyaline rings with numerous, minute, parallel, longitudinal ridges; internally raised septal rings lacking. Abdominal joints approximately equal in length but increase in breadth distally. Distal joint (generally the fourth or fifth abdominal joint) inflated proximally, cylindrical distally. Terminal margin of last joint incomplete. Pores of abdominal joints similar, small (generally 4-7 m), circular to subrectangular, separated by wide intervening bars, arranged in 3-8 (generally 5-6) transverse rows per joint, pores of each row approximately of equal size. In several specimens the pores are nearly completely filled with silica.

Measurements: based on 30 specimens from stations 27 and 34: maximum length of test 96-178 µm, maximum breadth (generally the distal joint) 57-87 µm; length of cephalis l5-20 µm, of thorax 16-25 µm, of abdominal joints 21-46 µm; breadth of cephalis 18-25 µm, of thorax 32-44 µm, of first abdominal joint 46-58 µm, of remaining abdominal joints 54-87 µm; length of apical spine 0-12 µm, of vertical spine 3-4 µm, of ventral tube 5-11 µm.

Remarks: Except for the apparent lack of a ventral cephalic tube, Lithostrobus seriatus Haeckel is identical with the species from the Gulf. Popofsky's text figures 131, 133, 134, 136, 137, and 140 of Lithamphora furcaspiculata Popofsky (1913, pp. 408-412) are similar to the Gulf species but have long internal axial spines. Study of the type material of these species should determine whether or not they are conspecific with the Gulf species.

Distribution: This species is rare but cosmopolitan in the Gulf. It is absent at stations 99, 130, 191, 203, 206, and 214.It occurs with slightly higher relative frequency at stations 56, 64, 95, and 106, and its average frequency in the southern half of the Gulf is slightly greater than that in the northern half. Whether or not it responds to upwelling in the Gulf cannot be determined from the numerical data. It prefers offshore, more nearly oceanic waters. This species is apparently confined to tropical regions.L. seriatus Haeckel was reported from Challenger stations 270-274 in the central tropical Pacific. Popofsky's illustrated specimens mentioned above were reported from the tropical western Indian and central Pacific Oceans. \ From: Benson, 1966, p. 521-523; pl. 35, figs. 12-13:Siphocampium cf. seriatus Haeckel?Lithostrobus seriatus Haeckel, 1887, Challenger Rept., Zool., vol. 18, p. 1474, Pl. 79, fig. 15.

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): Extant. Data source: Lazarus et al. 2015 - "R age group"
First occurrence (base): within Quaternary Period (0.00-2.59Ma, base in Gelasian stage). Data source: Lazarus et al. 2015 - "R age group"

Plot of occurrence data:


Benson, R. N. (1966). Recent Radiolaria from the Gulf of California. Thesis, Minnesota University. 1-577. gs

Casey, R. E. (1971c). Radiolarians as indicators of past and present water-masses. In, Funnel, B. M. & Riedel, W. R (eds) The Micropaleontology of Oceans. Cambridge University Press, Cambridge, UK 331-341. gs

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

Haeckel, E (1887). Report on the Radiolaria collected by H.M.S. Challenger during the years 1873-1876. Report on the Scientific Results of the Voyage of H.M.S. Challenger during the years 1873-1876. 18: 1-1803. gs O

Kling, S. A. (1973). Radiolaria from the eastern North Pacific, Deep Sea Drilling Project, Leg 18. Initial Reports of the Deep Sea Drilling Project. 18: 617-671. gs

Kling, S. A. (1977). Local and regional imprints on radiolarian assemblages from California coastal basin sediments. Marine Micropaleontology. 2(2): 207-221. gs

Nigrini, C. A. (1977). Tropical Cenozoic Artostrobiidae (Radiolaria). Micropaleontology. 23(3): 241-269. gs

Petrushevskaya, M. G. (1967). Radiolayarii otryadov Spumellaria i Nassellaria Antarkicheskoi oblasti (po materialam Sovetskoi Antarkitcheskikh Ekspeditsii). [Antarctic Spumelline and Nasselline radiolarians (from materials from the Soviet Antarctic Expedition)]. Issledovanie Faunyi Morey (Akademii Nauk SSSR) Leningrad. 4(12): 5-186. gs

Renz, G. W. (1974). Radiolaria from Leg 27 of the DSDP. Initial Reports of the Deep Sea Drilling Project. 27: 769-841. gs O

Riedel, W. R. & Sanfilippo, A. (1971). Cenozoic Radiolaria from the western tropical Pacific, Leg 7. Initial Reports of the Deep Sea Drilling Project. 7: 1529-1666. gs

Missing or ambiguous references: Dumitrica 1973; Ehrenberg 1844; Ehrenberg 1854; Petrushevskaya & Koslova 1972; Petrushevskaya 1971;


Botryostrobus auritus compiled by the radiolaria@mikrotax project team viewed: 24-6-2024

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