Ceratospyris laventaensis

Taxonomy

Catalog entries: Ceratospyris laventaensis

Original description: Shell strongly bilobate, relatively large, divided by a deep and wide median vertical stricture into two equal lobes or hemispheres, whole shell 0.8 transverse diameter in length; great-circle a thin, prismatic hoop from which arise longest of coryphal horns; pores circular to elliptical, some very much larger than others, often in pairs or groups of three to five, possibly about 30 on one hemisphere, shallow, with extremely thin mats of semitransparent, shell-substance around each single large one or group-sets of several within a common mat, these polyporous mats in turn enclosed by a thin, polygonal, prismatic network of black bars often but not always forming hexagons of various sizes, depending upon size of enclosed pores, and network as a whole resembling a wire-work basket, from bars of which arise frequent (mostly lateral and coryphal), short, recurved thorns so that surface is prickly; coryphal surface with five (six) long, needlelike, distally sharp spines, two (caudal) of which arise in connection with great-circle and are longer than other three (four) spines which are mostly frontal (and lateral); feet broken in nearly all our specimens but apparently seven, descending, divergent, straight, four-angled in section, with thick decurrent outer, free angles, as long as longest coryphal horns, and distally sharp; interspaces between legs low arches.
Remarks on original description: [Campbell and Clark here list this species under the subgeneric name Lophospyris and include the subgeneric name in the species name.

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within Messinian Stage (5.33-7.25Ma, top in Messinian stage). Data source: Suzuki catalog
First occurrence (base): within Tortonian Stage (7.25-11.62Ma, base in Tortonian stage). Data source: Suzuki catalog

Plot of occurrence data:

• Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
• Triangles indicate an event for which a precise placement has been suggested.
• (NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Ceratospyris

Ceratospyris laventaensis compiled by the radiolaria@mikrotax project team viewed: 5-9-2026 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/radiolaria/index.php?id=206285 Go to Archive.is to create a permanent copy of this page - citation notes

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