Weinmannioxylon ackamoides I.Poole et Cantrill

Plant Fossil Names Registry Number: PFN000393

Act LSID: urn:lsid:plantfossilnames.org:act:393

Authors: I. Poole & D. J. Cantrill

Rank: species

Reference: Poole, I. & Cantrill, D. J. (2001): Fossil Woods From Williams Point Beds, Livingston Island, Antarctica: A Late Cretaceous Southern High Latitude Flora. – Palaeontology 44(6): 1081–1112.

Page of description: 1096

Illustrations or figures: pl. 6, figs 1–6


Holotype P. 1806.11, British Antarctic Survey, Cambridge, United Kingdom
Figures: pl. 6, figs 1–6

Original diagnosis/description

Diffuse porous. Vessels solitary or occasionally in short radial chains of up to seven; vessel diameters small. Perforation plates scalariform with up to 50 narrow bars. Intervessel pitting opposite to scalariform. Rays uniseriate and multiseriate (maximum 5-seriate), heterocellular; majority of rays >500 μm in height; multiseriates sometimes axially united by uniseriate marginal cells. Vessel-ray pitting circular to horizontally elongate.


After the anatomical similarity to extant Ackama from New Zealand.


Cretaceous, Upper Cretaceous
Williams Point Beds, age-range of Cenomanian–early Campanian


ash-rich horizon outcropping between two large hydroclastic vents on Williams Point, Livingston Island, 62°28.5′S, 60°8.2′W

Plant fossil remain

fossil wood


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