CATALOG OF ORIGINAL DESCRIPTIONS: Actinomma acusosum Blueford 1982

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 -> A -> Actinomma -> Actinomma acusosum
Other pages this level: A. aculata, A. aculeatum, A. acusosum, A. aequale, A. anomalum, A. antarctica, A. anthomma, A. appenninicum, A. arcadophorum, A. boreale, A. brevispiculum, A. campilacantha, A. capillaceum, A. castanomma, A. cocles, A. comitatum, A. daturaeformis, A. denticulatum> >>

Actinomma acusosum

Citation: Actinomma acusosum Blueford 1982
Rank: species
Type locality: LD216
Type specimens: pl.3, figs.3-4
Type repository: Holotype: Plate 3, figure 4, DSDP Site 77, core B-22, section 5, 60-62 cm, England finder V13/1 (USNM 315054).
Described on page(s) : p.194

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Current identification:


Original Description
Three concentric shells, 84, 24, and 1 2µm in diameter. Outer surface with many (more than 1 5) thin-bladed spines 1 2µm in average length and many by-spines. Outer pores circular, nearly equal in size (6-10µm), closely packed, 7-12µm between pore centers. Inner pores circular, hexagonally framed. Numerous thin radial beams connecting middle and inner to outer shell. Innermost shell obscure.

Etymology: In reference to the many thin spines, from the Latin acus, needles and osus, full of.

Extra details from original publication
Distinguishing features: Small size and three shells, of which the outermost has thin-bladed spines and circular pores. Actinomma leptodermum (Jorgensen, 1900) has unequal, roundish oval pores and larger shell diameter


Editors' Notes
Actinomma acusosum is relatively rare at both sites. No upper limit is known; a possible lower limit between cores 45 and 46 at Site 289 that is not correlative with Site 77 is indicated.[comment from RadWorld database]

References:

Blueford, R (1982). Miocene actinommid Radiolaria from the equational Pacific. Micropaleontology. 28(2): 189-213. gs


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Actinomma acusosum compiled by the radiolaria@mikrotax project team viewed: 1-3-2021

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