Lamprocyrtis heteroporos


Classification: rads_cenozoic -> Pterocorythidae -> Lamprocyrtis -> Lamprocyrtis heteroporos
Sister taxa: L. daniellae, L. heteroporos, L. neoheteroporos, L. nigriniae, L. sp.

Taxonomy

Citation: Lamprocyrtis heteroporos (Hays) Kling 1973
Rank: species
Basionym: Lamprocyclas heteroporos
Taxonomic discussion: (Hays) 1965 p.179 pl.3 fig.1 as Lamprocyclas; Kling 1973 p.639 pl.5 figs.19-21, pl.15 figs.4,5

Catalog entries: Lamprocyclas heteroporos

Original description: Shell rough, campanulate, with indistinct collar stricture but distinct lumbar stricture; relative length of three joints 2.5:5:7, although in some specimens the thorax and abdomen are nearly equal. Cephalis hemispherical, pores circular to subcircular with diameter about equal to bar width. Cephalis bears a long three-bladed apical horn, as long as, to three times as long as, cephalis. Thorax campanulate, with pores similar in size and shape to those of cephalis, arranged in irregular longitudinal rows, 5-7 pores per row; pores increase in size distally. Abdomen cylindrical to slightly conical with maximum diameter just above mouth; pores large, irregular in size and shape, separated by thick bars; abdominal pores 2-3 times the size of thoracic pores. Aperture slightly constricted, 3-5 poorly developed short terminal teeth extend downward from a thick peristomal ring.

Length of apical horn 22-60µm, of cephalis 15-25µm, of thorax 48-65µm, of abdomen 55-70µm. Maximum width of shell 88-100µm, diameter of thoracic pores 4-9µm, usually about 6µm, of abdominal pores 10-22µm.

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within Neogene Period (2.59-23.03Ma, top in Piacenzian stage). Data source: Lazarus et al. 2015 - "N age group"
First occurrence (base): within Neogene Period (2.59-23.03Ma, base in Aquitanian stage). Data source: Lazarus et al. 2015 - "N age group"

Plot of occurrence data:

References:

Hays, J. D. (1965). Radiolaria and late Tertiary and Quarternary history of Antarctic Seas. In, Llano, G. A. (ed.) Biology of the Antractic Seas II. Antarctic Research Series (AGU). 5: 124-184. gs

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


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Lamprocyrtis heteroporos compiled by the radiolaria@mikrotax project team viewed: 16-6-2021

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