radiolaria - rads_cenozoic - Siphocampe lineata radiolaria - rads_cenozoic - Siphocampe lineata

Siphocampe lineata


Classification: rads_cenozoic -> Artostrobiidae -> Siphocampe -> Siphocampe lineata
Sister taxa: S. acephala, S. altamontensis, S. arachnea, S. bassilis, S. daseia, S. elizabethae, S. grantmackiei, S. imbricata, S. lineata, S. minuta, S. modeloensis, S. nodosaria, S. pachyderma, S. quadrata, S. septata, S. stathmeporoides, S. sp.

Taxonomy

Citation: Siphocampe lineata (Ehrenberg 1839) Nigrini 1977
taxonomic rank: species
Basionym: Lithocampe lineata
Synonyms:
1838 Lithocampe lineata - Ehrenberg p. 130 (partim)
1847 Eucyrtidium lineatum - Ehrenberg p. 43 (partim)
1854 Eucyrtidium lineatum - Ehrenberg pl. 22, fig. 26
1887 Tricolocampe cylindrica - Haeckel p. 1412; pl. 66, fig. 21
1966 Siphocampium cf. cylindrica - Benson p. 520-521; pl. 35, figs. 10-11
1971 Tricolocampe cylindrica - Petrushevskaya p. 198; fig. 123, I-III
1971 Lithomitra lineata group - Riedel and Sanfilippo p. 1600 (partim); pl. 1I, fig. 2
1974 Lithomitra lineata group - Renz p. 794; pl. 17, figs. 12a-12b
1976 Lithomitra lineata group - Renz p. 140; pl. 6, fig. 7
1977 Siphocampe lineata group - Nigrini p. 256; pl. 3, figs. 9-10
1980 Siphocampe lineata group - Johnson and Nigrini p. 135; pl. 4, fig. 8
1983 Siphocampe lineata group - Benson p. 508
1987 Tricolocampe cylindrica - Boltovskoy and Riedel p. 101; pl. 6, fig. 9
1991 Siphocampe lineata - Takahashi p. 129 pl. 44, figs. 17-20
1995 Tricolocampe lineata forma lineata - van de Paverd p. 253; pl. 76, figs. 16-18
1998 Tricolocampe cylindrica - Boltovskoy fig. 15.165
Taxonomic discussion: (Ehrenberg) 1838

Catalog entries: Lithocampe lineata

Original description: loricae ocellorum seriebus transversis rectis.
Translated description: [Shells with pores in straight transverse rows. (Translation from Latin by E.M.R. and W.R.R.).]
Remarks on original description: Partly synonymized with Botryostrobus auritus-australis (Ehrenberg) by Nigrini, 1977
partly synonymized with Siphocampe arachnea group (Ehrenberg) by Nigrini, 1977[comment from RadWorld database]

Description


Published descriptions


Ehrenberg 1861 - Lithocampe lineata

loricae lineis longitudinalibus aliis lineolis transversis in opus reticulatum contextis. E. fundo 10998 groenlandico.


Benson 1966 - Lithocampe lineata

Cephalis, ventral tube, and thorax the same as in Siphocampium sp.; apical spine lacking. Thoracic pores small, separated by wider intervening bars, arranged in 4-5 transverse rows. Thorax separated from a long, narrow, cylindrical abdomen by a distinct stricture; internal septal ring, if present, is indistinct. Pores of abdomen small, subrectangular, arranged in 10-13 or more transverse rows, each row separated by a hyaline region with minute longitudinal ridges; the widths of the row of pores and of the hyaline region about equal. Mouth of abdomen not constricted; terminal margin not observed completely developed. Test completely smooth. No more nor less than three joints were observed.

Measurements: based on 5 specimens from stations 27 and 34: maximum length of test 139-153 m, maximum breadth (abdomen) 48-54 µm; length of cephalis 15-17 µm, of thorax 22-26 µm, of abdomen 102-117 µm; breadth of cephalis 18-21 µm, of thorax 34-37 µm; length of ventral tube 6-11 µm.

Remarks: There is no doubt that this species belongs in the genus Siphocampium Haeckel because it has a ventral cephalic tube. Haeckel's illustration of Tricolocampe cylindrica Haeckel. does not show a cephalic tube but does have transverse rows of abdominal pores separated by hyaline areas. Examination of the type material of this species should determine whether or not it is identical with the Gulf species.

Distribution: This species occurs sparsely and very rarely in the southern half of the Gulf. It is present only at stations 27, 34, 56, 60, 64, 71, and 93. If this species is the same as T. cvlindrica Haeckel, it is apparently confined to tropical regions. Haeckel reported the latter from the tropical central Pacific at Challenger stations 265-274. \ From: Benson, 1966, p. 520-521; pl. 35, figs. 10-11:Siphocampium cf. cylindrica Haeckel?Tricolocampe cylindrica Haeckel, 1887, Challenger Rept., Zool., vol. 18, p. 1412, Pl. 66, fig. 21.


Nigrini 1977 - Lithocampe lineata

Shell small, bullet-shaped, consisting of cepalis, thorax and abdomen; abdomen usually marked by a series of five to seven rounded constrictions alternating with one transverse row of subcircular pores. There is a well-developed surface network or sculpture of both longitudinal and transverse ridges, which is the most distinctive characteristic of the species. Cephalis spherical with a few irregularly scattered pores; no apical horn; vertical tube short, cylindrical, directed obliquely upward at about 45. Collar stricture indistinct. Thorax somewhat inflated with two (according to Petrushevskaya, 1967, three or four) transverse rows of subcircular pores. Lumbar stricture not well developed. Post-thoracic segmentations usually marked by indentations, more pronounced proximally than distally, between pore rows. Termination ragged, or there may be a poreless peristome with a ragged margin, as tough it is broken along a pore row. Dimensions (based on 17 specimens): Total length 110-160µm; maximum breadth 47-60µm.


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:

References:

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

Benson, R. N. (1983). Quaternary radiolarians from the Mouth of the Gulf of California, Deep Sea Drilling Project Leg 65. Initial Reports of the Deep Sea Drilling Project. 65: 491-523. gs

Boltovskoy, D. & Riedel, W. R. (1987). Polycystine Radiolaria of the California current region: Seasonal and geographic patterns. Marine Micropaleontology. 12(1): 66-104. 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. (1847). Uber die mikroskopischen kieselschaligen Polycystinen als machtige Gebirgsmasse von Barbados und uber das Verhaltniss der aus mehr als 300 neuen Arten bestehenden ganz eigenthumlichen Formengruppe jener Felsmasse zu den jetzt lebenden Tieren und zur. Bericht uber die zu Bekanntmachung geeigneten Verhandlungen der Koniglichen Preussische Akademie der Wissenschaften zu Berlin. 1847: 41-60. 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

Johnson, D. A. & Nigrini, C. A. (1980). Radiolarian biogeography in surface of the western Indian Ocean. Marine Micropaleontology. 5(2): 111-152. gs

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

Renz, G. W. (1976). The distribution and ecology of Radiolaria in the central Pacific: plankton and surface sediments. Bulletin of the Scripps Institution of Oceanography. 22: 1-267. gs

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

Takahashi, K. (1991). Radiolaria: Flux, ecology, and Taxonomy in the Pacific and Atlantic. Ocean Biocoenosis Series. 3: 1-301. gs

van de Paverd, P. J. (1995). Recent Polycystine Radiolaria from the Snellius-II Expedition. Thesis, Free University Amsterdam. 1-351. gs

Missing or ambiguous references: Ehrenberg 1838; Ehrenberg 1854; Ehrenberg 1861; Petrushevskaya 1971;


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Siphocampe lineata compiled by the radiolaria@mikrotax project team viewed: 27-2-2024

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