CATALOG OF ORIGINAL DESCRIPTIONS: Gorgospyris hemisphaerica sibirica

This page provides data from the catalog of type descriptions. The catalog is sorted alphabetically. Use the current identification link to go back to the main database.


Higher levels: rads_cat -> G -> Gorgospyris -> Gorgospyris hemisphaerica sibirica
Other pages this level: G. cystophora, G. cystophora brevipes, G. cystophora cystophora, G. eurycolpos, G. hemisphaerica, G. hemisphaerica sibirica, G. hexapodalia, G. infida, G. lamellipes, G. lamellosa, G. liriope, G. medusa, G. medusetta, G. perizostra, G. perplexus, G. polypus, G. quinquespine, G. schizopodia, G. thamnopodia

Gorgospyris hemisphaerica sibirica

Citation: Gorgospyris hemisphaerica sibirica
Rank: sub-species
Type specimens: pl. 15, fig. 8
Described on page(s) : p. 97
Family (traditional): Trissocyclidae
Family (modern): Triospyridae

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Current identification:


Original Description
Description. The hemispherical skeleton, without an outer depression, is slightly tapered at the aperture. Thin wall; the surface is tuberculate and rough. Almost all of the numerous, small pores are equal in size and form: they are round and irregularly spaced between the tubercles, which, while merging, form around the pores hexagonal frames with smoothed angular apexes; the lower row consists of smaller and more closely spaced pores. The apical spine has the form of a small, curved, sharp splnule. The wide, round aperture is surrounded by 16 short, flat, wide, smooth apophyses with rectangular distal ends; the apophyses radiate slightly outward. Measurements in µ. Height of skeleton 60µ - 70µ, width 80µ - lOOµ, thickness of wall 6µ - 7µ, diameter of pores 8µ -lOµ, smaller ones 5µ, width of aperture 60y, width of apertural apophyses at the base 6µ - 12µ. G. hemisphaerica Clark et Campbell subsp. siblrlca differs from the typical subspecies (species) in having larger measurements and a thinner wall; it has 16 apertural apophyses instead of 12; the surface of these apophyses is smooth and they curve outward; the pores in our subspecies are not so regularly spaced. Distribution. Upper Eocene of Western Siberia. Irbltsk series of the Tyumensko-Petropavlovsk area and the eastern slope of the Urals.

Editors' Notes
dbl - entered n. subsp. desc from K and G 1966 12.3.19

References:

Kozlova, G. E. & Gorbovets, A. N. (1966). Radiolyarii verkhnemelovykh i verkhnyeeotsenovykh otlozheniy Zapadno-Sibirskoy nizmennosti. Trudy Vsesoyuznego Neftyanogo Nauchno-Issledovatel 'skogo Geologo-Razvedochnogo Instituta (VNIGRI). 1-158. gs


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Gorgospyris hemisphaerica sibirica compiled by the radiolaria@mikrotax project team viewed: 1-3-2021

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