CATALOG OF ORIGINAL DESCRIPTIONS: Dendrospyris haysi Chen 1975

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 -> D -> Dendrospyris -> Dendrospyris haysi
Other pages this level: D. acuta, D. arborescens, D. binapertonis, D. bursa, D. eurus, D. fragoides, D. furcata, D. futaba, D. golli, D. haysi, D. inferispina, D. jostae, D. megalocephalis, D. pannosa, D. polyrrhiza, D. quadripes, D. ramosa, D. sachalinensis, D. sakaii, D. stabilis, D. suganoi, D. turriturcica dasyotus, D. turriturcica turriturcica, D. uruyaensis

Dendrospyris haysi

Citation: Dendrospyris haysi Chen 1975
Rank: species
Type specimens: pl.2, figs.3-5
Type repository: U.S. National Museum, Washington, D.C. [Nonumber given]
Described on page(s) : p.?
Family (traditional): Trissocyclidae
Family (modern): Acanthodesmiidae

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Current identification:

Original Description
Sagittal ring D-shaped, joined to the back and apex of lattice shell. Apical spine very short, conical. Six basal pores separated by two primary and two secondary lateral bars. Lattice shell thick, constricted at sagittal and basal rings, and extending below the basal ring as the thorax. Thorax subcylindrical or inverted conical. Pores subcircular to polygonal and of variable dimensions; slightly larger in the thorax of some specimens. Shell generally terminated by lattice bars or terminated smoothly, and constricted slightly at mouth.

(Dimensions based on 30 specimens) Width of cephalis 99-144µm, width of thorax 90-1 26µm. Length of cephalis 80-103µm. Length of thorax 65-190µm. Distinguishing characters (rw): This species differs from Desmospyris spongiosa Hays in the lack of a spongy shell, and from Dendrospyris stabilis Goll in having larger dimensions of the shell and less densely spaced and larger pores. Phylogeny (rw): These three species have similar internal structures, and form the evolutionary lineage Dendrospyris stabilis - Dendrospyris haysi - Desmospyris spongiosa.

Etymology: This species is named after James D. Hays in recognition of his valuable contributions to the field of radiolarian studies.


Chen, P. H. (1974). Some new Tertiary Radiolaria from Antarctic deep-sea sediments. Micropaleontology. 20(4): 480-492. gs


Dendrospyris haysi compiled by the radiolaria@mikrotax project team viewed: 15-5-2021

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