An Eocene tardigrade (Mammalia, Xenarthra) from Seymour Island, West Antarctica

Carlini et al. (1990) reported the presence of Xenarthra (Mammalia) from the Eocene deposits of Seymour Island, Antarctic Peninsula, based on an ungual phalanx from locality RV 8200. The locality, referred to informally as “mammal site” by Woodburne & Zinsmeister (1984), is located at 64°14′21″S...

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Bibliographic Details
Published in:Antarctic Science
Main Authors: Vizcaíano, Sergio F., Scillato-Yané, Gustavo J.
Format: Article in Journal/Newspaper
Language:English
Published: Cambridge University Press (CUP) 1995
Subjects:
Geology
Ecology, Evolution, Behavior and Systematics
Oceanography
Antarctic
Antarctic Peninsula
Patagonia
West Antarctica
Seymour
Seymour Island
Antarc*
Antarctic Science
Antarctica
Tardigrade
Online Access:http://dx.doi.org/10.1017/s0954102095000563
https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102095000563
Description
Summary:Carlini et al. (1990) reported the presence of Xenarthra (Mammalia) from the Eocene deposits of Seymour Island, Antarctic Peninsula, based on an ungual phalanx from locality RV 8200. The locality, referred to informally as “mammal site” by Woodburne & Zinsmeister (1984), is located at 64°14′21″S, 56°39′44″W at an elevation of 45 m in the middle levels of the shallow marine La Meseta Formation (TELM 5 of Saddler 1988). Carlini et al . (1990) initially identified the phalanx as a megatherioid sloth (Order Tardigrada). Marenssi et al. (1994) revised its identification to ?Tardigrada or ?Vermilingua, by comparison with a primitive myrmecophagid (Order Vermilingua) from the Lower Miocene of Patagonia, whose ungual phalanges are indistinguishable from those of primitive sloths (Carlini et al. 1992). We report a fragmentary tooth of a member of the Tardigrada (Family incertue sedis ) confirming the presence of this group in the Eocene of Antarctica.

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