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After obtaining fresh material of Opatrinus puertoricenis P uerto Rico a cornparison was done with a large series of . armasi. This latter taxon had been previously compared with Marcuzzi's original description, mainly based on his illustration of male genitalia from Jamaica reckoned to be O. puertoricenis. Genitalia from 0. p. puertoricenis (from Puerto Rico) and 0. armasi, proved to be quite alike. Also morphological characters of the two populations are not very distinct, offering differentiations better considered under subspecific rather than specific level. Therefore, we propose considering 0. arrrzasi Garrido and Gutiérrez, 1994, as a subspecies associated with 0. puertoricenis Marcuzzi, 1977. Based on the differences shown in the male genitalia of 0. armasi and 0. puertoricenis from Puerto Rico and Jamaica, we consider that the animals from Jamaica are different from Puerto Rico's (0. puertoricenis), and therefore constitute an undescribed species different from 0. puertoricenis.
Specimens assigned to 0. pullus from Cuba and Puerto Rico, do not differ, either morphologically, or in their genitalia, therefore both populations should be treated ns members of the same taxon.
Male genitalia of 0. armasi, O. puertoricenis and 0. pullusare herein illustrated.