CATALOG OF ORIGINAL DESCRIPTIONS: Lychnodictyum aberrans Campbell & Clark 1944

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 -> L -> Lychnodictyum -> Lychnodictyum aberrans
Other pages this level: L. aberrans, L. audax, L. pellucidum, L. scaphopodium, L. sethopodium, L. simplex, L. wyvillei

Lychnodictyum aberrans

Citation: Lychnodictyum aberrans Campbell & Clark 1944
Rank: species
Type specimens: pl.6, fig.7
Type repository: University of California, Museum of Paleontology, San Francisco
Described on page(s) : p.43
Family (traditional): Plagiacanthidae
Family (modern): Lophophaenidae

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Current identification:


Original Description
Shell tiny, stout (1.3 maximum diameter in length); cephalis hornless, hemispherical, and nearly 0.5 total length in diameter, cervix strongly indented, whole like a huge knob; thorax bell-shaped (32°) with decidedly convex sides, its free margin irregular (torn ?), about same in diameter as cephalis, and with three very short, distally blunted, conical, terminal feet; surface of cephalis roughened, of thorax smooth; wall of cephalis thicker than thorax; pores of cephalis smaller than those of thorax, deeply set, scattered, closely set, circular, of thorax, about twice as large as those of cephalis, commonly elliptical, shallow, fairly well separated and scattered.

Length, total, 99µm; diameter of maximum, 55µm, of largest pores, 8.8µm. Distinguishing characters (rw): Lychnodictyum aberrans n. sp. differs chiefly from scaphopodium (Haeckel, 1887), a recent, Central Pacific species and only other one without an apical ham, in having feet not lobular nor latticed and margin between them less arched.

Etymology: No information given, but: Latin abberans -antis = abnormal

References:

Campbell, A. S. & Clark, B. L. (1944a). Miocene radiolarian faunas from southern California. Geological Society of America, Special Papers. 51: 1-76. gs


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Lychnodictyum aberrans compiled by the radiolaria@mikrotax project team viewed: 15-5-2021

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