Iphiclus is a large genus – possibly the most diverse – in the pleasing fungus beetle family (Erotylidae). This genus belongs to subfamily Erotylinae and occurs across the Neotropics. Its almost 300 named species are divided into several subgenera, whose monophyly (and validity), however, remains to be determined. Most of these beetles, as adults as well as larvae, feed on polypores (shelf fungi).

The genus name was established by Louis Alexandre Auguste Chevrolat in 1837. Chevrolat´s name was, however, overshadowed by the extensive study of Jean Théodore Lacordaire a few years later, who described most of the currently-known species and introduced the genus name Brachysphoenus. That genus name, or spelling variants thereof, was generally used by subsequent authors – namely in the seminal works on the genus by George Robert Crotch in the mid-1870s, Henry Stephen Gorham in the late 1880s, Paul Kuhnt around 1910, Leopold Mader around 1940, and Jacintho Guérin in 1956 –, until Iphiclus was reinstated by Moacyr Alvarenga in the 1960s.

 Iphiclus unites species whose adults are generally similar to Erotylus and other close relatives. However, they can be recognized by an elongated oval shape and elytra which are usually only slightly convex (unlike some relatives such as Aegithus, which are almost hemispherical); the base of the pronotum has at least a weak – in some, a pronounced – medial lobe, and the legs are of moderate length. On the head of Ischyrus, the compound eyes are finely faceted, the clypeus is short and wedge-shaped with a wide base, the mentum has a triangular plate, and the ends of the maxillary palps are widened to a triangle shape.

Systematics: 
The division into subgenera must be considered provisional. As of the early 21st century, even the monophyly of the genus as such is not considered likely anymore; some subgenera (in particular Habrodactylus) are probably paraphyletic, while others (such as Megaprotus) seem to warrant recognition as distinct genera.

Subgenus Iphiclus (Aegithomorphus) Lacordaire, 1842 – southeastern Brazil. Type species: I.biplagiatus.

• Iphiclus biplagiatus (Guérin-Méneville, 1841)
• Iphiclus dorsomaculatus (Lacordaire, 1842)

Subgenus Iphiclus (Brachymerus) Chevrolat, 1837 (= Barytopus, Neobarytopus) – lowlands and foothills from Guatemala to northern Argentina. Type species: I.nitidulus. Close to subgenus Megaprotus and genus Prepopharus.

• Iphiclus adustus
• Iphiclus alboniger (Guérin, 1956)
• Iphiclus amictus (Erichson, 1847)
• Iphiclus andicola (Kirsch, 1876)
• Iphiclus assequens (Mader, 1942)
• Iphiclus bajulus (Lacordaire, 1842)
• Iphiclus batesi (Gorham, 1889)
• Iphiclus bellulus (Lacordaire, 1842)
• Iphiclus bicinctus (Olivier, 1807)
• Iphiclus bistrifoliatus (Gorham, 1889)
• Iphiclus bizonatus (Crotch, 1876)
• Iphiclus bremei (Guérin-Méneville, 1841)
• Iphiclus brongniarti (Lacordaire, 1842)
• Iphiclus brunneostriolatus (Kuhnt, 1910)
• Iphiclus cerasinus (Lacordaire, 1842)
• Iphiclus conformis (Lacordaire, 1842)
• Iphiclus distinctus (Duponchel, 1825)
• Iphiclus divisus (Guérin, 1956)
• Iphiclus dorsalis (Olivier, 1792)
• Iphiclus eburneus (Crotch, 1876)
• Iphiclus elegans (Mader, 1942)
• Iphiclus epipleuralis (Crotch, 1876)
• Iphiclus erichsoni (Lacordaire, 1842)
• Iphiclus exoticus (Voet, 1778)
• Iphiclus flavofasciatus (Duponchel, 1825)
• Iphiclus flavosignatus (Duponchel, 1825)
• Iphiclus fragmentatus (Gorham, 1888)
• Iphiclus friedeli (Mader, 1938)
• Iphiclus geometra (Lacordaire, 1842)
• Iphiclus hebraicus (Lacordaire, 1842)
• Iphiclus hexastictus (Crotch, 1876)
• Iphiclus incas (Gorham, 1889)
• Iphiclus iris (Guérin, 1956)
• Iphiclus jacinthoi Alvarenga, 1977
• Iphiclus laceratus (Mader, 1938)
• Iphiclus lugens (Lacordaire, 1842)
• Iphiclus lunaris (Guérin, 1956)
• Iphiclus luteozonatus (Crotch, 1876)
• Iphiclus miles (Mader, 1942)
• Iphiclus mirus (Mader, 1942)
• Iphiclus musicalis (Lacordaire, 1842)
• Iphiclus neophyta (Lacordaire, 1842)
• Iphiclus nigripennis (Demay, 1838)
• Iphiclus nigropictus (Lacordaire, 1842)
• Iphiclus nigrotrifasciatus (Mader, 1942)
• Iphiclus nitidulus (Olivier, 1807)
• Iphiclus obsoletesignatus (Crotch, 1876)
• Iphiclus octoguttatus (Olivier, 1807)
• Iphiclus octopustulatus (Guérin, 1956)
• Iphiclus odyneroides (Crotch, 1876)
• Iphiclus ornatus (Kuhnt, 1909)
• Iphiclus pantherinus (Kuhnt, 1909)
• Iphiclus pauper (Guérin, 1956)
• Iphiclus peraffinis (Crotch, 1876)
• Iphiclus perplexus (Mader, 1942)
• Iphiclus peruvianus (Mader, 1942)
• Iphiclus planipennis (Kuhnt, 1909)
• Iphiclus puncticollis (Kirsch, 1876)
• Iphiclus quadrifasciatus (Kirsch, 1865)
• Iphiclus quinquefasciatus (Lacordaire, 1842)
• Iphiclus ramosus (Olivier, 1807)
• Iphiclus regularis (Erichson, 1848)
• Iphiclus rhomboidalis (Guérin, 1956)
• Iphiclus salamandra (Erichson, 1847)
• Iphiclus spectabilis (Lacordaire, 1842)
• Iphiclus stramineus (Lacordaire, 1842)
• Iphiclus subsanguineus (Crotch, 1876)
• Iphiclus superbus (Mader, 1942)
• Iphiclus tigrinatus (Guérin, 1956)
• Iphiclus tricinctus (Duponchel, 1825)
• Iphiclus trifasciatus
• Iphiclus tripartitus (Lacordaire, 1842)
• Iphiclus ucayalensis (Gorham, 1889)
• Iphiclus venezuelae (Crotch, 1876)
• Iphiclus westwoodi (Guérin-Méneville, 1841)

Subgenus Iphiclus (Habrodactylus) Lacordaire, 1842 – lowlands and foothills from southern Mexico to northern Argentina. Type species: I.sulphurifer. Probably a paraphyletic assemblage, with I.conspicillatus basal to the entire assemblage of Iphiclus and related genera, and others placed in this subgenus close to genus Ellipticus and Erotylina. Some are patterned with eyespots; others are largely brownish with little black patterning. Larvae feed individually in some species, but as a group in I.conspicillatus.

• Iphiclus agathinus (Guérin-Méneville, 1841)
• Iphiclus annulatus
• Iphiclus antennalis (Lacordaire, 1842)
• Iphiclus arculifer (Kirsch, 1883)
• Iphiclus basinotatus (Crotch, 1876)
• Iphiclus bisquadripunctatus (Kuhnt, 1911)
• Iphiclus bisquinquepunctatus (Lacordaire, 1842)
• Iphiclus bisquinquesignatus (Mader, 1942)
• Iphiclus bistripunctatus (Lacordaire, 1842)
• Iphiclus brevicollis (Gorham, 1888)
• Iphiclus centromaculatus (Lacordaire, 1842)
• Iphiclus cereus (Gorham, 1888)
• Iphiclus concolor (Lacordaire, 1842)
• Iphiclus congener (Lacordaire, 1842)
• Iphiclus conspicillatus (Gorham, 1888)
• Iphiclus cordiger (Crotch, 1876)
• Iphiclus decemoculatus (Mader, 1943)
• Iphiclus decemplagiatus (Kuhnt, 1910)
• Iphiclus decempunctatus
• Iphiclus deficiens (Crotch, 1876)
• Iphiclus deletus (Lacordaire, 1842)
• Iphiclus detritus (Lacordaire, 1842)
• Iphiclus discrepans (Guérin, 1956)
• Iphiclus discus (Lacordaire, 1842)
• Iphiclus egensis (Gorham, 1889)
• Iphiclus exiguenotatus (Gorham, 1888)
• Iphiclus festivus (Lacordaire, 1842)
• Iphiclus fulvipennis (Erichson, 1847)
• Iphiclus fuscipes
• Iphiclus fuscomaculatus (Duponchel, 1825)
• Iphiclus grammicoides (Mader, 1943)
• Iphiclus grammicus (Erichson, 1847)
• Iphiclus haematites (Lacordaire, 1842)
• Iphiclus haematomelas (Lacordaire, 1842)
• Iphiclus hamatus (Guérin, 1956)
• Iphiclus hoffmani
• Iphiclus hybridus (Lacordaire, 1842)
• Iphiclus ictericus (Lacordaire, 1842)
• Iphiclus jejunus (Gorham, 1888)
• Iphiclus kourouensis (Lacordaire, 1842)
• Iphiclus manicatus (Lacordaire, 1842)
• Iphiclus melanostictus (Crotch, 1876)
• Iphiclus meleagris (Lacordaire, 1842)
• Iphiclus mendax (Lacordaire, 1842)
• Iphiclus multiguttatus (Gorham, 1888)
• Iphiclus obliquatus (Kuhnt, 1910)
• Iphiclus obliqueguttatus (Crotch, 1876)
• Iphiclus oblitus (Lacordaire, 1842)
• Iphiclus oblongonotatus (Lacordaire, 1842)
• Iphiclus pallidipennis (Gorham, 1888)
• Iphiclus palmatus (Lacordaire, 1842)
• Iphiclus perspicillatus (Lacordaire, 1842)
• Iphiclus proximus (Guérin-Méneville, 1844)
• Iphiclus punctiger (Lacordaire, 1842)
• Iphiclus quadrimaculatus (Duponchel, 1825)
• Iphiclus rufescens (Lacordaire, 1842)
• Iphiclus rufifrons (Lacordaire, 1842)
• Iphiclus scutulatus (Kuhnt, 1910)
• Iphiclus septemmaculatus (Guérin, 1956)
• Iphiclus spadiceus (Lacordaire, 1842)
• Iphiclus striatipennis (Gorham, 1888)
• Iphiclus subsignatus (Lacordaire, 1842)
• Iphiclus sulphurifer
• Iphiclus tabidus (Erichson, 1847)
• Iphiclus tetrastictus (Crotch, 1876)
• Iphiclus thoracicus (Kirsch, 1876)
• Iphiclus vetula (Lacordaire, 1842)

Subgenus Iphiclus (Iphiclus) Chevrolat, 1837 – lowlands and foothills from Guatelama to northern Paraguay. Type species: I.flavovittatus. Close to subgenus Saccomorphus and genus Erotylina. Some are patterned with eyespots. Larvae feed individually?

• Iphiclus abdominalis
• Iphiclus atrisignatus Alvarenga, 1976
• Iphiclus basalis (Crotch, 1876)
• Iphiclus chelonarius (Lacordaire, 1842)
• Iphiclus cingulatus (Lacordaire, 1842)
• Iphiclus claropictus (Kuhnt, 1910)
• Iphiclus decemnotatus (Duponchel, 1825)
• Iphiclus flavovittatoides (Mader, 1943)
• Iphiclus flavovittatus (Duponchel, 1825)
• Iphiclus flexuosus (Lacordaire, 1842)
• Iphiclus guttatus (Duponchel, 1825)
• Iphiclus guttiger (Kuhnt, 1910)
• Iphiclus intersectus
• Iphiclus lineellus (Duponchel, 1825)
• Iphiclus maculatus (Voet, 1778)
• Iphiclus ocellatus (Kuhnt, 1910)
• Iphiclus octodecimguttatus (Lacordaire, 1842)
• Iphiclus pardalinus (Lacordaire, 1842)
• Iphiclus pictus (Duponchel, 1825)
• Iphiclus quadristictus (Guérin, 1956)
• Iphiclus quinquevigintipunctatus (Mader, 1943)
• Iphiclus rubidus
• Iphiclus scutellaris (Gorham, 1888)
• Iphiclus sedecimmaculatus
• Iphiclus sedecimpustulatus (Lacordaire, 1842)
• Iphiclus sexpunctatus
• Iphiclus striolatus (Guérin, 1956)
• Iphiclus tenuecinctus (Lacordaire, 1842)
• Iphiclus titschacki (Mader, 1942)
• Iphiclus varians (Lacordaire, 1842)
• Iphiclus ventralis (Lacordaire, 1842)
• Iphiclus vigintipunctatus

Subgenus Iphiclus (Megaprotus) Lacordaire, 1842 – lowlands and foothills from southern Mexico to northern Argentina. Type species: I.signatus. Close to subgenus Brachymerus and genus Prepopharus. Some are patterned with eyespots. Larvae feed individually?

• Iphiclus ardens (Curran, 1941)
• Iphiclus argus (Kuhnt, 1910)
• Iphiclus catillifer (Gorham, 1888)
• Iphiclus cinctellus (Lacordaire, 1842)
• Iphiclus circulus (Lacordaire, 1842)
• Iphiclus clarosignatus (Kuhnt, 1910)
• Iphiclus coadunatus (Lacordaire, 1842)
• Iphiclus cunctabandus (Mader, 1942)
• Iphiclus decussatus (Lacordaire, 1842)
• Iphiclus delineatus (Lacordaire, 1842)
• Iphiclus dilectus (Gorham, 1888)
• Iphiclus duodecimpustulatus (Lacordaire, 1842)
• Iphiclus duplicatus (Lacordaire, 1842)
• Iphiclus ephippium
• Iphiclus epigraphus (Crotch, 1876)
• Iphiclus eximius (Lacordaire, 1842)
• Iphiclus fasciellus (Crotch, 1876)
• Iphiclus fasciunculus (Crotch, 1876)
• Iphiclus laetus (Crotch, 1876)
• Iphiclus laevipennis (Kuhnt, 1910)
• Iphiclus luctuosus (Kuhnt, 1910)
• Iphiclus luteoniger (Crotch, 1876)
• Iphiclus luteopictus (Crotch, 1876)
• Iphiclus masculinus (Crotch, 1876)
• Iphiclus moniliferus (Guérin-Méneville, 1841)
• Iphiclus nubilus (Lacordaire, 1842)
• Iphiclus nuculus (Gorham, 1888)
• Iphiclus obliteratus (Guérin, 1956)
• Iphiclus octolinearis (Kuhnt, 1910)
• Iphiclus octopunctatus (Kirsch, 1876)
• Iphiclus orphanulus (Lacordaire, 1842)
• Iphiclus patruelis (Kuhnt, 1910)
• Iphiclus perlepidus (Lacordaire, 1842)
• Iphiclus pithecius (Lacordaire, 1842)
• Iphiclus porcellana (Lacordaire, 1842)
• Iphiclus pulcher (Gorham, 1888)
• Iphiclus sedecimlinearis (Mader, 1942)
• Iphiclus sedecimpunctatus (Lacordaire, 1842)
• Iphiclus sedecimstrigatus (Mader, 1942)
• Iphiclus sexsigillatus (Lacordaire, 1842)
• Iphiclus signatus
• Iphiclus zonulus (Crotch, 1873)

Subgenus Iphiclus (Neacronotus) Alvarenga, 1965 (= Acronotus Lacordaire, 1842 (non Smith, 1827: preoccupied)) – Colombia; doubtful record from Mexico. Type species: I.annularis.

• Iphiclus annularis (Laporte, 1840)
• Iphiclus bimaculicollis (Mader, 1942)
• Iphiclus colombi (Guérin-Méneville, 1844)
• Iphiclus perversus (Gorham, 1889)

Subgenus Iphiclus (Neomorphoides) Alvarenga, 1977 (= Morphoides Crotch, 1876 (non Hope, 1841: preoccupied)) – lowlands and foothills from Guatemala to southern Brazil. Type species: I.simplex.

• Iphiclus amazonus (Crotch, 1876)
• Iphiclus atriventris (Mader, 1943)
• Iphiclus bicolor (Lacordaire, 1842)
• Iphiclus clavicornis (Olivier, 1792)
• Iphiclus columbiae (Crotch, 1876)
• Iphiclus costaricensis (Mader, 1943)
• Iphiclus disconigrum (Mader, 1942)
• Iphiclus dorsonotatus
• Iphiclus fulviventris (Gorham, 1888)
• Iphiclus humeropictus (Mader, 1943)
• Iphiclus lateripunctatus (Crotch, 1876)
• Iphiclus melanopus (Gorham, 1888)
• Iphiclus neglectus (Guérin, 1956)
• Iphiclus nigritarsis (Mader, 1942)
• Iphiclus nigriventris (Crotch, 1876)
• Iphiclus nigropectus (Mader, 1943)
• Iphiclus posticenigrum (Mader, 1942)
• Iphiclus pyrrhocephalus (Erichson, 1847)
• Iphiclus rubripennis (Lacordaire, 1842)
• Iphiclus rufipennis (Fabricius, 1801)
• Iphiclus signaticollis (Kuhnt, 1910)
• Iphiclus simplex
• Iphiclus spilotus (Gorham, 1888)
• Iphiclus tibialis (Duponchel, 1825)

Subgenus Iphiclus (Neoogaster) Alvarenga, 1965 (= Oogaster Lacordaire, 1842 (non Falderman, 1840: preoccupied)) – Guadeloupe and Dominica (Lesser Antilles) and possibly adjacent islands; a record from French Guiana is erroneous. Resemble Aegithus in coloration, being black with unpatterned tan elytra, but are overall flatter and narrower in shape; larvae also similar to Aegithus. Type species: I.guadeloupensis.

• Iphiclus guadeloupensis (Fabricius, 1792) (= I.marginatus)
• Iphiclus suturalis (Lacordaire, 1842)

Subgenus Iphiclus (Saccomorphus) Chevrolat , 1837 (= Charidemus, Morphoides Hope, 1841) – lowlands and foothills from Panama to northern Argentina and Chile. Type species: I.limbatus. Close to genus Erotylina. At least some seem to eat a wider range of fungi than other species placed in Iphiclus.

• Iphiclus adamsi (Lacordaire, 1842)
• Iphiclus bilineatus (Duponchel, 1825)
• Iphiclus bimaculatus
• Iphiclus bisigillatus (Lacordaire, 1842)
• Iphiclus collaris (Deelder, 1942)
• Iphiclus erotyloides (Crotch, 1876)
• Iphiclus erythrocephalus (Olivier, 1807)
• Iphiclus glyptoderus (Lacordaire, 1842)
• Iphiclus goianus (Guérin, 1948)
• Iphiclus haematocephalus (Lacordaire, 1842)
• Iphiclus humeralis (Guérin, 1956)
• Iphiclus intercedens (Schenkling, 1919)
• Iphiclus interruptus (Kuhnt, 1908)
• Iphiclus klugi (Lacordaire, 1842)
• Iphiclus krafti (Mader, 1935)
• Iphiclus kuhnti (Mader, 1942)
• Iphiclus limbatus (Olivier, 1792)
• Iphiclus maculicollis (Kuhnt, 1910)
• Iphiclus mundus (Schenkling, 1919)
• Iphiclus mutabilis (Gorham, 1889)
• Iphiclus nebulosus (Guérin-Méneville, 1841)
• Iphiclus nitidus (Mader, 1942)
• Iphiclus paraguayanus (Mader, 1943)
• Iphiclus placitus (Kirsch, 1876)
• Iphiclus procerus (Erichson, 1847)
• Iphiclus quadrisignatus (Duponchel, 1825)
• Iphiclus ruficeps (Guérin-Méneville, 1841)
• Iphiclus terrestris (Gistel, 1857)
• Iphiclus testaceipennis (Mader, 1942)

Subgenus Iphiclus (Sternolobus) Guérin-Méneville, 1841 – eastern Andes foothills from Venezuela to northern Peru. Type species: I.bisignatus.

• Iphiclus atricaudatus (Kuhnt, 1910)
• Iphiclus bisignatus (Guérin-Méneville, 1841)
• Iphiclus dispilotus (Lacordaire, 1842)
• Iphiclus ecuadorensis (Crotch, 1876)
• Iphiclus ellipticus (Kuhnt, 1910)
• Iphiclus luscus (Erichson, 1847)
• Iphiclus oblongosignatus (Guérin-Méneville, 1844)

Iphiclus virgatus was long placed in genus Mycotretus, but while it does seem to belong into Iphiclus, as of 2023 its precise relationships were still undetermined.