radiolaria - rads_cat - Spirocyrtis hemispira radiolaria - rads_cat - Spirocyrtis hemispira

CATALOG OF ORIGINAL DESCRIPTIONS: Spirocyrtis hemispira Haeckel 1887

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 -> S -> Spirocyrtis -> Spirocyrtis hemispira
Other pages this level: S. cornutella, S. diplospira, S. elegans, S. greeni, S. gyroscalaris, S. hemispira, S. hollisi, S. holospira, S. merospira, S. parvaturris, S. proboscis, S. scalaris, S. submerospira, S. subscalaris, S. subtilis

Spirocyrtis hemispira

Citation: Spirocyrtis hemispira Haeckel 1887
Rank: species
Described on page(s) : p.1510
Type age (chronostrat): [presumably Quaternary though some forms reported from this station appear to be Tertiary]
Type locality: LM25
Type repository: No information given

Current identification:

Original Description

Shell slender, nearly spindle-shaped, three times as long as broad, without external strictures, but with ten to eleven internal septa. The five or six upper of these are perfectly separate, complete parallel rings; the five or six lower are spirally connected. The eleven or twelve joints gradually taper in length and breadth, from the broadest middle towards the two constricted ends of the shell. The middle (fifth or sixth) joint is the broadest, and is three to four times as broad as the constricted mouth. Cephalis small, hemispherical, with a conical horn of the same length. Pores regular, circular, hexagonally framed.

Length of the shell (with twelve joints) 0.25, breadth 0.09; length of the middle joint 0.03

Editors' Notes
There was no illustration of this species in Haeckel (1887)
Haeckel listed Spirocyrtis hemispira under the subgeneric name Spirocyrtoma, but did not include the subgeneric name in the species name.[comment from RadWorld database]


Haeckel, E (1887a). 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


Spirocyrtis hemispira compiled by the radiolaria@mikrotax project team viewed: 1-6-2023

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