Scelianoma elydimorpha, a new genus and new species of entimine weevil from southwestern Puerto Rico (Coleoptera: Curculionidae, Entiminae) / Scelianoma elydimorpha, género nuevo y especie nueva de picudo entimino del suroeste de Puerto Rico (Coleoptera: Curculionidae, Entiminae)

Scelianoma elydimorpha Franz & Girón, new genus and new species, an entimine weevil endemic to southwestern Puerto Rico, is described and illustrated in detail, and assigned to the tribe Eustylini (Curculionidae: Entiminae). Scelianoma is distinguished from related taxa by the following diagnostic features: shape narrowly elongate, length/width ratio 2.8-3.5; integument with densely arranged scales; pronotum without conspicuous sculpturing; male metatibia with row of 5-7 teeth, each tooth with a spine-like seta; female metatibia lacking teeth, yet with row of long, narrowly depressed setae; metatibial corbel linear; elytral humeri absent, elytra in lateral view with dorsal outline subplane, lacking cuticular projections, posterior declivity strongly angulate, slightly convex (male) to rectate (female); and wings absent. The elytra of S. elydimorpha are sexually dimorphic, attenuating in males along the posterior 5/6 yet mostly subparallel in females, and the females furthermore have two rows of erect setae along each mesal side of the declivity. Scelianoma elydimorpha is common on the southern limestone slopes of the well-preserved Guánica dry forest. The immature stages and host plants are unknown.

Scelianoma elydimorpha Franz & Girón, género nuevo y especie nueva, un picudo entimino endémico al sureste de Puerto Rico, se describe e ilustra en detalle, y se asigna a la tribu Eustylini (Curculionidae: Entiminae). Scelianoma se distingue de taxones relacionados por los siguientes rasgos diagnósticos: forma estrechamente elongada, relación largo-ancho 2.8-3.5; integumento con escamas densamente arregladas; pronoto sin esculturas conspicuas; metatibia del macho con fila de 5-7 dientes, cada diente con una seta espinosa; metatibia de la hembra sin dientes, pero con fila de setas largas y estrechamente deprimidas; corbela de la metatibia linear; hombros elitrales ausentes, élitros en vista lateral con perfil dorsal subplano, sin proyecciones cuticulares, declive elitral fuertemente angulado, ligeramente convexo (macho) hasta recto (hembra); y alas ausentes. Los élitros de S.elydimorpha son sexualmente dimórficos, atenuándose en machos a lo largo de los 5/6 posteriores pero en su mayor parte subparalelos en hembras, y las hembras tienen además dos filas de setas erectas a lo largo de cada lado mésico del declive. Scelianoma elydimorpha es común en las pendientes de piedra caliza del sur del bosque seco y bien preservado de Guánica. Los estadios inmaduros y las plantas hospederas no son conocidos.

Pollination of Anthurium (Araceae) by derelomine flower weevils (Coleoptera: Curculionidae)

Cyclanthura flower weevils (Coleoptera: Curculionidae: Derelomini) are identified for the first time as pollinators of multiple species of Anthurium (Araceae) in Costa Rica. The weevils are present on the inflorescences in small numbers during the pistillate and staminate phase of anthesis, and consume plant tissues and pollen. The individuals of one species of Cyclanthura can visit several Anthurium species within the same locality. They also engage in reproductive activities and are likely to oviposit into the flowers. The mating strategies suggest that sperm precedence selects males that are able to secure their position as the last partner prior to oviposition.