CATALOG OF ORIGINAL DESCRIPTIONS: Novodiacanthocapsa erdnussa 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 -> N -> Novodiacanthocapsa -> Novodiacanthocapsa erdnussa
Other pages this level: N. erdnussa

Novodiacanthocapsa erdnussa

Citation: Novodiacanthocapsa erdnussa Empson-Morin 1981
Rank: species
Type locality: LD11
Type age (chronostrat): Late Campanian, Late Cretaceous, Mesozoic.
Type specimens: pl.10, figs.1A-C
Type repository: Holotype, USNM 305350. Paratypes, USNM 305351, U.S. National Museum, Washington, D.C.
Repository city: Washington
Described on page(s) : p.270

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Current identification:


Original Description
Test commonly with 2 or 3 chambers. Cephalis small, subcircular to subellipsoidal, perforate, almost completely submerged within thoracic wall and/or cavity. Thorax large, hemispherical, perforate, Cephalothorax dome-shaped. Pores of cephalothorax small; irregular in shape and disposition at apex, otherwise subcircular and arranged in poorly to moderately well-defined longitudinal rows with 10 to 15 pores per row. Pore frames predominantly polygonal, commonly with 5 or 6 sides; 2 to 3 times as wide as pores and delimited by elevated rims giving surface a roughened appearance. Abdomen, when present, generally equal to or greater in size than cephalothorax (commonly by a factor of 2 or 3); elongate, sybcylindrical through part of its length but tapering gradually to rapidly toward distal end to form a constricted aperture. Aperture may be produced at end of an extended tube. Pores and pore frames of abdomen may be similar to those of cephalothorax or may be disposed in more well-defined longitudinal rows with pore frames coalescing distally to form vertical ridges between which the pores are confined. Lumbar stricture moderately well defined.

Size: Dimensions of holotype: Total length 247µm. Maximum width 123µm. Cephalothorax height 98µm. Abdomen length 149µm.

Etymology: The specific name comes from the German \Erdnuss\" meaning peanut."

Extra details from original publication
Distinguishing features: It is common to find specimens which consist of only 2 chambers. These individuals are structurally analogous to the first 2 segments of the tricyrtid forms and possess broad, open apertures. This could mean any of several things: (1) that the dicyrtid in

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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Novodiacanthocapsa erdnussa compiled by the radiolaria@mikrotax project team viewed: 14-4-2021

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