Pseudoanacardium Manchester et Balmaki

Plant Fossil Names Registry Number: PFN000443

Act LSID: urn:lsid:plantfossilnames.org:act:443

Authors: S. R. Manchester & B. Balmaki

Rank: genus

Reference: Manchester, S. R. & Balmaki, B. (2018): Spiny fruits revealed by nano-CT scanning: Pseudoanacardium peruvianum (Berry) gen. et comb. nov. from the early Oligocene Belén flora of Peru. – Acta Palaeobotanica 51(1): 41–48.

Page of description: 42

Illustrations or figures: pls 1, 2

Type

Original diagnosis/description

Fruits reniform, bisymmetrical, with keel in plane of symmetry, lensoidal to nearly circular in cross section, unilocular and single-seeded. Fruit wall
ornamented with closely spaced spines on all surfaces except along elliptical ridge over ventral concavity. Spines terete, 1.6 mm long. Fruit wall from which the spines arise, ca 1 mm thick, represented only by space between silica locule cast and sedimentary impression of fruit. Locule cast convex dorsally, concave ventrally, rounded over one end, narrower and pointed at other end, with large circular scar ca 1/3 of full length of locule, positioned on
central portion of ventral surface. Locule cast smooth or sometimes striate, with striae running oblique to plane of symmetry. Seed coat thin, shrunken away from locule.