rad_org Acrospyris lingi, img2612.jpg
rad_org Acrospyris lingi, img2613.jpg
rad_org Acrospyris lingi, img2614.jpg
/Acrospyris/Acrospyris lingi/rad_org Acrospyris lingi, img2612.jpg)
rad_org Acrospyris lingi, img2612.jpg/Acrospyris/Acrospyris lingi/rad_org Acrospyris lingi, img2613.jpg)
rad_org Acrospyris lingi, img2613.jpg/Acrospyris/Acrospyris lingi/rad_org Acrospyris lingi, img2614.jpg)
rad_org Acrospyris lingi, img2614.jpg
1973 Acanthodesmid sp. - Ling p. 780, pl. 2, fig. 1
1995 Acrospyris lingi - Shilov p. 110; pl. 2, fig. 4a-b
From Suzuki Paleotax db:
1995 Acrospyris lingi n. sp. Shilov p. 110, pl. 2, figs. 4a, 4b
Catalog entries: Acrospyris lingi
type image: A. lingiOriginal description: A shell with a well-developed cephalis. Apical spine not developed. Shell thick-walled. Sagittal ring slightly protruding on to the outer surface on cephalis. Cephalis pores of different size, commonly arranged symmetrically relative to the sagittal ring. Diameter of large pores about 20 μm; that of small ones, 8-11 μm. Dimensions of cephalis: length, 55-80 μm; width, 75-100 μm (based on measurements of 20 specimens). Commonly about 6 basal feet. They are connected by transverse bars and form something similar to a thorax with large pores and smaller fine bars. Single pores are visible in places of their junction. When there are 6 basal feet, they form a hexahedron in the section. The diameter of pores is 40-45 μm; thickness of bars, 10-15 μm. Width of pseudothorax 100-110 μm; the preserved length 50-60 μm.
Ling 1973 - Acrospyris lingi Remarks: This species demonstrates wide variation in the nature of the five basal spines, ranging from short oblique projections to long downwardly extended legs and connected by horizontal bars with short spines, one of which is illustrated here. Limited time as well as reference materials did not permit the author to make a thorough and detailed comparison of this species with other related forms. However, this species is found in abundance from Core 21 of Site 183, together with Cyrtocapsella tetrapera and the above mentioned Amphymenium sp., thus may have potentiality as a Miocene index taxon.
Published descriptions
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:
Ling, H-y. (1973). Radiolaria: Leg 19 of the Deep Sea Drilling Project. Initial Reports of the Deep Sea Drilling Project. 19: 777-797. gs Shilov, V. V. (1995b). Miocene-Pliocene radiolarians from Leg 145, North Pacific. Proceedings of the Ocean Drilling Program, Scientific Results. 145: 93-116. gs Missing or ambiguous references: Shilov 1995; References:
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Acrospyris lingi compiled by the radiolaria@mikrotax project team viewed: 14-10-2024
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