Otoba vespertilio, a new endemic tree species from the Caribbean slope of Costa Rica and Panama, is described and illustrated. This species is similar to O. cyclobasis, but differs in having leaf blades with 6–8 secondary veins per side (vs. 14–17) and staminate flowers with the pedicel 2–3.6 mm long (vs. 4–5 mm) and without an extrastaminal disc surrounding the base of the staminal column (vs. extrastaminal disc present). Data on its distribution and habitat, phenology, and taxonomy are included, as are photographs of the living plant and a key to identify the four species of the genus in Mesoamerica.

中文翻译：

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Otoba vespertilio (Myristicaceae), una especie nueva de Mesoamérica

Otoba vespertilio 是来自哥斯达黎加和巴拿马加勒比海斜坡的一种新的特有树种，被描述和说明。该物种与 O. cyclobasis 相似，但不同之处在于叶片每侧有 6-8 次次脉（与 14-17 相比）和花梗长 2-3.6 毫米（与 4-5 毫米）和雄花没有围绕雄蕊柱基部的雄蕊外盘（相对于存在雄蕊外盘）。包括其分布和栖息地、物候学和分类学的数据，以及活植物的照片和识别中美洲四种该属物种的关键。