11. Astrocaryum horridum Barbosa Rodrigues (1891a: 104) .

Type:— BRAZIL. Rio Javary [Javari], s.d., Barbosa Rodrigues (“Herb. Mus. Bot. Amaz. n. 720”—probably destroyed) . Neotype [designated by Glassman (1972: 17) as “type”, here corrected]:—Illustration in Barbosa Rodrigues (1903b: Tab. 81A) .

= Astrocaryum javarense (Trail 1877: 77) Drude (1881: 372) .

Notes:— Kahn & Millan (1992), Henderson et al. (1995), and POWO (2024) list Astrocaryum horridum as a synonym of Astrocaryum javarense . In the protologue, Barbosa Rodrigues (1888) mentioned a single specimen collected on “Rio Javari” and deposited in the Museu Botânico do Amazonas herbarium. To address that this material was lost (Porto 1892, Prance 1971, Mori & Ferreira 1987), Glassman (1972) designated the illustration (Fig. 8) in Barbosa Rodrigues’ renowned work Sertum Palmarum Brasiliensium from 1903 as the “type” ( Barbosa Rodrigues 1903b). Considering no other original material was discovered during our thorough investigation, we recognize Glassman’s designation of the illustration as a neotype.