Litheleodes Blaisdell, a subgenus of Eleodes Eschscholtz, is reviewed with diagnoses, distributions, and nomenclatural notes for the nine included species. A type species, Blaps extricata Say, is herein designated, and the subgeneric definition is updated to differentiate it from related subgenera. The species, distributed over the western USA and adjacent parts of Canada and Mexico, are keyed and illustrated.

Recent California collection records for three adventive species of soil-dwelling darkling beetles (Coleoptera: Tenebrionidae) are provided, with observational notes on habitats and spread. Gonocephalum sericeum (Baudi), a widespread, synanthropic species in northern Africa and Middle East, is reported from the Western Hemisphere for the first time. The species is illustrated and diagnosed, and the genus is incorporated into a key to North American Opatrini. Gondwanocrypticus platensis (Fairmaire), a South American species of Crypticini often associated with nest debris of imported fire ants, has spread widely in southern California. Opatroides punctulatus Brullé, first discovered in the Sacramento area in 2003–2008, has recently been found in abundance in and around Reno, Nevada and is spreading to new California counties. All three species are thought to be facultative opportunistic ant associates in disturbed habitats.

The tenebrionid tribe Amphidorini LeConte from the state of Arizona is herein reviewed. Amphidorini is represented in Arizona by four genera. Trogloderus LeConte and Neobaphion Blaisdell are each represented by a single species, Embaphion Say by three species, and Eleodes Eschscholtz by 34 species. Keys for genus and species identification are provided along with species accounts containing diagnoses, distributional ranges, and images. A complementary on—line dynamic checklist, available on the Symbiota Collections of Arthropods Network (SCAN), is presented.

The flightless genus DiceroderesSolier, 1841 previously contained a single species, Diceroderes mexicanusSolier, 1841, known from Mexico and Guatemala. The genus is revised based on an examination of museum material, revealing that the genus contains at least four additional species, each with a fairly limited montane distribution. Diceroderes mexicanus is redescribed and a lectotype is designated from Solier's collection. Four new species are described: Diceroderes subtriplehorni Smith and Cifuentes-Ruiz, new species, from Mexico (Veracruz and Oaxaca), Diceroderes ocozocoautlaensis Smith, new species, from Mexico (Chiapas), Diceroderes skelleyi Smith, new species, from Guatemala (El Progreso and Baja Verapaz), and Diceroderes cusucoensis Smith, new species, from Honduras (Cortés) and Guatemala (Izabal). The genus is redescribed, and a key to the known species, habitus and male genitalic images, and a distribution map are provided.

Somocoelia triplehorni Merkl and Egorov, new species, is described from Iran (Eastern Alborz Mts.). This is the first species of the tribe Platyscelidini from Iran. Somocoelia gracilipesKaszab, 1940, new status, is re-elevated to species rank.

Bradymerus triplehorni Grimm, new species (Tenebrionidae: Stenochinae: Cnodalonini), from West Malaysia, is described, illustrated, and compared with the most similar species, Bradymerus kinabalicusSchawaller, 2006.

Antennoluprops triplehorni Schawaller and Aalbu, new species, (Coleoptera: Tenebrionidae: Lagriinae: Lupropini) is described from Madagascar, being the third known species of this unusual genus endemic to Madagascar. Members of AntennolupropsSchawaller, 2007 can be recognized by small body size around 2 mm, the 10-segmented antennae, and mainly by the modified and specific shape of antennomere 5 in males.

The new tenebrionid genus Taurohelops Keskin and Nabozhenko, new genus (tribe Helopini), including two species from Central Taurus Mountains, Turkey, is described. The new genus belongs to the Cylindrinotus genus-group but differs from other genera of the tribe Helopini by structures of the male tibiae, abdominal ventrites 3–5, male aedeagus, and presence of coeloconic sensilla on the pronotum. One new combination is established: Taurohelops incultus (Allard, 1877), new combination (from Odocnemis Allard). One new species, Taurohelops triplehorni Keskin and Nabozhenko, new species, is described. A lectotype for Helops lordiscelisReitter, 1900 is designated. Data on distribution, bionomics and morphology of the two species of Taurohelops are given.

The genus Craniotus LeConte is revised. The genus includes Craniotus pubescens LeConte and the following new species: Craniotus mardecortesi Aalbu, Smith, and Sanchez Piñero (Isla San Esteban, Baja California, Mexico) and Craniotus triplehorni Aalbu, Smith, and Sanchez Piñero (Gulf Islands and Baja California, Mexico). Craniotus blaisdelli Tanner is placed as a synonym of C. pubescens. This form corresponds to northern populations of C. pubescens. A key to the species is provided. The distribution and biology of the genus are briefly discussed.

The genus CylindrinotusFaldermann, 1837, with species distributed in Transcaucasia, central and eastern Anatolia, northern Iran, and Syria, is reviewed. The taxonomic history and general morphology of adults of the genus are considered. The new speciesCylindrinotus charlesi Nabozhenko is described from Erzurum Province, Turkey. A new synonymy is proposed: Helops (Cylindrinotus) constrictusSeidlitz, 1896 = Helops (Cylindrinotus) funestoides Reitter in Bodemeyer, 1900. Lectotypes are designated for Cylindrinotus batesiAllard, 1876, Helops (Cylindrinotus) nitidusSeidlitz, 1896, H. funestoides, and Helops (Cylindronotus) bellatorReitter, 1902. The holotype of uncertain species Cylindrinotus gibbosus (Seidlitz, 1896) was studied, and a redescription and notes on distribution of this species are given. Bibliography, synonymy, and key for all species are given.

Scleropatroides Löbl and Merkl, 2003 (Tenebrioninae: Opatrini) is recorded from Australia for the first time, based on Scleropatroides triplehorni Iwan and Matthews, new species. Scleropatroides is compared with the related genera Scleropatrum Reitter, 1877 and PolycoelogastridionReichardt, 1936. The world distribution of the three genera is discussed, and their included species are listed in an appendix. New combinations proposed are Scleropatroides girardi (Ferrer, 2000) and Scleropatroides gustafssoni (Ferrer, 2000), both transferred from Scleropatrum.

Chaseleodes Thomas, a new subgenus of Eleodes Eschscholtz, is described and proposed to hold two species from central Mexico, Eleodes connatus Solier and Eleodes curtus Champion (designated as type species). A key, map, illustrations, and diagnoses are provided for the species. Characters that in combination define the new subgenus include the wedge-shaped elytron, broadly based epipleuron, and the female valvifers. The subgenus is named in honor of Dr. Chas. A. Triplehorn.

The tenebrionid beetle Vabole triplehorni Alekseev and Nabozhenko, new genus and new species (tribe Palorini), is described from Baltic amber. The new genus has the following combination of tribal characters: round eyes, compact antennae (but with weakly longitudinal antennomeres), unlobed cylindrical tarsomeres, mesocoxal cavities closed by the ventrites, and transverse, angulate scutellum. Additionally, Vabole has a 4-4-4 tarsal formula, which is characteristic among Tenebrionidae for some genera of the tribes Palorini, Hyocini, Rhipidandrini, Archaeoglenini, and the subfamily Lagriinae. The new genus is most similar to the extant genus Platycotylus Oliff, 1883 based on the strongly flattened body and longitudinal antennomeres, but differs from this genus and most genera of the tribe Palorini based on the tarsal formula, small antennomere 11 compared to the preceding antennomeres, presence of strong spines on the inner side of the tibiae, and the wide prosternal process. A brief ecological and zoogeographical discussion is provided.

Herein we provide a nomenclatural review of the world Alleculinae genus-group names. Author, year of publication, type species, and type fixation are included for each name. Five fossil genera as well as 188 extant genera and 41 subgenera are considered valid. The following new replacement names are proposed: Borchmannius Bousquet and Bouchard for GlyptothoraxBorchmann, 1937; Piccula Bousquet and Bouchard for GerardiaPic, 1954. The type species of the following genus-group names are designated: ErxiasChampion, 1888 (Erxias bicolorChampion, 1888), LobopodaSolier, 1835 (Lobopoda striataSolier, 1835), MenesChampion, 1888 (Menes meridanusChampion, 1888), PlesiaKlug, 1833 (Plesia melanuraKlug, 1833) and PleuromophlusReitter, 1906 (Omophlus baudueri Baudi, 1877). The following new synonymies are introduced: ParomophlusIablokoff-Khnzorian, 1983 (with PhibalusGistel, 1856); PleuromophlusReitter, 1906 (with OdontomophlusSeidlitz, 1896). LepturideaFauvel, 1862 is considered the valid name for AethyssiusPascoe, 1863. Three remaining nomenclatural problems (cf. Otys Champion, Prostenus Klug, and Odontomophlus Seidlitz) will require applications to the International Commission on Zoological Nomenclature to promote stability.

Three new species of the genus Archaeoglenes Brown are described: Archaeoglenes gomyi Iwan and Kamiński (Réunion), Archaeoglenes loebli Iwan and Kamiński (Mauritius), and Archaeoglenes triplehorni Iwan and Kamiński (New Caledonia). Morphology and anatomy of the newly described species are investigated using micro-CT techniques. Archaeoglenes gomyi and A. loebli extend the generic range to the Afrotropical realm. Distributional data concerning all known representatives of Archaeoglenes are revised and discussed. Archaeoglenes novaeguineae Kaszab, 1982 is proposed as a synonym of Archaeoglenes baloghi Kaszab, 1982. The 5-5-4 tarsal formula is reported for the first time for Archaeoglenes (A. baloghi). The newly obtained morphological and anatomical data are incorporated into the taxonomic concept of Archaeoglenes.

Thinobatis profana Kulzer is transferred from Thinobatis (Pimeliinae: Thinobatini) to Vaniosus Kulzer (Pimeliinae: Evaniosomini) on the basis of constant tribal level characters. The genus Thinobatis Eschscholtz is thereby removed from the Argentine fauna and confined only to coastal areas of Chile. The genus Achanius Erichson (including the subgenus Ambigatus Fairmaire) is transferred from Edrotini (Eurymetopini of Doyen) to Evaniosomini based on the structure of the internal female reproductive tract and mandible configuration. Achanius (Ambigatus) antofagastensis Flores and Aballay, new species, is described. Redescriptions of Thinobatis, Vaniosus, and Achanius, with habitus photographs, SEM images, and illustrations of female genital features, are provided. The eating habits of V. profana and A. antofagastensis feeding on decomposing pig and llama carcasses are given for the first time. These two species showed preferences for microhabitat conditions and association with stages of decomposition. They should be considered for potential forensic importance on bodies found in arid environments.

Odontocera triplehorniWappes and Santos-Silva, new species, is described from Parque Nacional La Muralla, Olancho, Honduras and Montaña Selva Negra, Matagalpa, Nicaragua. It is compared to the closely related species Odontocera chrysostetha Bates, 1870.

Three new species of hispine beetles (Coleoptera: Chrysomelidae: Cassidinae) from the United States are described, illustrated, and discussed: Baliosus randia Riley (Texas), Heptispa brevicornis Riley (Texas), and Sumitrosis triplehorni Riley (Florida). A fourth species originally described from Mexico, Odontota signaticollis (Baly), is newly recorded from the United States (Arizona, New Mexico) and is removed from Xenochalepus Wiese and newly combined with Odontota Chevrolat, new combination.

An examination of three Maurice Pic types of Pseudodendroides Blair requires as many nomenclatural actions. Pseudodendroides nitidicollisPic, 1955 is transferred to Himalapyrochroa Young: Himalapyrochroa nitidicollis (Pic), new combination. Pseudodendroides distinctipennisPic, 1938 is transferred to Sinodendroides Young: Sinodendroides distinctipennis (Pic), new combination. Pseudodendroides nitidicollis sulcatithorax 1955, Pic is congeneric with Pseudodendroides and not conspecific with Himalapyrochroa nitidicollis, hence it is elevated to specific rank: Pseudodendroides sulcatithorax Pic, new status. A lectotype is also proposed for P. distinctipennis.