Type Species. Falsoceratoprion fumagalliae Ferreira, new species.

Etymology. The name refers to the similarity of the new genus to the Neotropical mainland genus Ceratoprion Gorham, 1884. Falso is a Latin word meaning false, deceiving.

Differential Diagnosis. Falsoceratoprion can be separated from all other known West Indian Lycidae (extant and fossil) by the combination of the following characteristics: distinctly serrate antennae (vs. subserrate or pectinate in Thonalmus Bourgeois, 1883; distinctly serrate in Mesopteron Bourgeois, 1905; subserrate, filiform, flabellate or pectinate in the Leptolycini), with the pedicel multiple times shorter than antennomere 3 (vs. variable across the different genera, usually pedicel and antennomere 3 subequal in length, with exceptions in the Leptolycini [pedicel much shorter than antennomere 3 in Cessator Kazantsev, 2009 and Dominopteron Kazantsev, 2013]); the apparently developed mouthparts (vs. standard mouthparts in all Thonalmus and Mesopteron; Leptolycini, with weakly developed mandibles that are seemingly absent, with either strongly reduced or absent labial palps).

Falsoceratoprion also has a subtrapezoidal pronotum, bearing an obscure fovea in the posterior portion (vs. usually subpentagonal in Thonalmus, bearing a distinct longitudinal carina in the anterior half and a cell in the posterior region; bearing a strongly visible longitudinal carina, entire through its full extent in Mesopteron; variable shapes in Leptolycini); the smooth elytra, not bearing any transverse costae nor presenting strongly developed cells (vs. overall strongly developed, irregular cells in Thonalmus; distinctly subquadrate and strongly developed cells in Mesopteron and Dominopteron; smooth elytra in all other Leptolycini); the strongly setose and dehiscent elytra (vs. variable across the groups, expanded apically or only weakly dehiscent in Thonalmus, usually glabrous; parallel-sided and bearing short setation in several Mesopteron; variable in the Leptolycini, which are overall dehiscent and densely setose in Electropteron Kazantsev, 2013) and for bearing three distinctly visible costae that are fused apically (vs. three costae in Thonalmus and Mesopteron; variable in the Leptolycini, but usually two-costate).

From the described Lycidae genera occurring on the Neotropical mainland, Falsoceratoprion is superficially similar to Ceratoprion, Ceratolycus Kazantsev, 2017, and Aplopteron Kazantsev, 2017, differing from these genera by possessing normally developed mouthparts (vs. weakly developed and strongly reduced labial palps in the mentioned genera), a densely setose body (vs. glabrous in the mentioned genera) and the pronotum not possessing a median longitudinal carina (vs. presence of a longitudinal carina in the mentioned genera, which has a cell in Ceratolycus and Aplopteron).

Description of Male. General coloration and setation: Thorax, head, coxae, base of femora and basal third of elytra pale yellow, remainder of body brown, body densely setose throughout (Fig. 1). Head: As long as wide, widest at eyes (Fig. 1A), hypognathous (Fig. 1B), frons posterior to antennal insertion strongly bulging (Fig. 1A), apparently concave behind eyes (Fig. 1A). Eyes hemispherical, projecting anterolaterally, coarsely granulate (Fig. 1). Mouthparts: Maxillary palp apparently four segmented (Fig. 1A); terminal maxillary palpomere elongate, spatulate (Fig. 1A). Antenna: With 11 antennomeres, from antennomere 3–10 distinctly serrate; densely setose, dorsoventrally flattened, inserted in gibbous prominence at anterior distal portion of head (Fig. 1); if in resting position, longer than body (Fig. 1); scape pyriform, approximate at base, subconical; pedicel ca. 4× shorter than scape; antennomeres 4–10 subequal, slightly increasing in length towards apex (Fig. 1A); antennomere 11 narrowly rounded apically (Fig. 1A). Thorax: Pronotum trapezoidal, transverse, lateral edges moderately developed (Fig. 1), posteriorly apparently bearing a weakly developed median fovea, median longitudinal carina apparently absent (Fig. 1A). Elytra: Dehiscent, weakly ligulate, 3-costate, with short bristle-like setae throughout (Fig. 1A); costae weakly developed, subparallel; costa I discontinued medially, costae II+III subapically fused (Fig. 1A). Abdomen: With eight ventrites; ventrite 7 shallowly notched medially; ventrite 8 lanceolate, apically blunt, ca. 4× longer than ventrite 7, ca. one-fourth longer than tergite 9 (Fig. 1B). Length (head + pronotum + elytra): 3.3 mm. Width (across humeri): 0.7 mm.

Examined Material. Holotype: Falsoceratoprion fumagalliae Ferreira, new species. DOMINICAN AMBER: Oligo-Miocene, Dominican Republic. Specific locality: Unknown. The specimen is a well-preserved amber bead that had been polished prior to study. It will be deposited in the collection of the Civic Museum of Fossils of Besano (Besano, VA, Italy).

Description and Diagnosis. The diagnosis and description of F. fumagalliae is coextensive with the generic description and diagnosis.

Etymology. This species is named after Lorenzo Tettamanzi's grandmother, Giuseppina Fumagalli (1928–2017), who, together with her husband Silvio, has always encouraged and supported, with enormous love and enthusiasm, her grandson Lorenzo's passion for collecting fossils and minerals.