CATALOG OF ORIGINAL DESCRIPTIONS: Schadelfusslerus echtus Empson-Morin 1981

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 -> Schadelfusslerus -> Schadelfusslerus echtus
Other pages this level: S. echtus

Schadelfusslerus echtus

Citation: Schadelfusslerus echtus Empson-Morin 1981
Rank: species
Type locality: LD10
Type age (chronostrat): Campanian, Late Cretaceous, Mesozoic.
Type specimens: pl.10, figs.5-6c
Type repository: Holotype: USNM No. 305356, U.S. and paratype: USNM No. 305357, U.S. National Museum, Washington, D.C.
Repository city: Washington
Described on page(s) : p.276

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Current identification:


Original Description
Shell commonly of 2 segments. Cephalis large, dome-shaped. Pores of cephalis tend to become occluded by shell material so cephalis is essentially imperforate; when present, pores are small, subcircular, quincuncially arranged, and depressed into polygonal pore frames which remain prominent after pores are sealed. Collar stricture well defined. Thorax large, hemispherical, perforate, with 3 feet arising from distalmost portion. Pores of thorax small; sub-circular; recessed into center of large, polygonal pore frames; and arranged in moderately to well-defined longitudinal rows. Polygonal pore frames commonly with 6 sides and bordered by an elevated rim. Feet somewhat convex outward and projecting down from base of thorax, broad, massive, often expanding distally, with scalloped edges, equally spaced.

Size: (Dimensions of holotype) Total length of shell (without feet) 77µm, of cephalis 19µm, maximum width 93µm.

Etymology: The specific name comes from the German \echt\" = genuine, true, real."

References:

Empson-Morin, K. M. (1981). Campanian Radiolaria from DSDP Site 313, Mid-Pacific Mountains. Micropaleontology. 27(3): 1-13. gs

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Schadelfusslerus echtus compiled by the radiolaria@mikrotax project team viewed: 25-2-2021

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