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Background: Alzheimer's disease is a common debilitating dementia with known heritability, for which 20 late onset susceptibility loci have been identified, but more remain to be discovered. This study sought to identify new susceptibility genes, using an alternative gene-wide analytical approach which tests for patterns of association within genes, in the powerful genome-wide association dataset of the International Genomics of Alzheimer's Project Consortium, comprising over 7 m genotypes from 25,580 Alzheimer's cases and 48,466 controls.
Principal findings: In addition to earlier reported genes, we detected genome-wide significant loci on chromosomes 8 (TP53INP1, p = 1.4×10−6) and 14 (IGHV1-67 p = 7.9×10−8) which indexed novel susceptibility loci.
Significance: The additional genes identified in this study, have an array of functions previously implicated in Alzheimer's disease, including aspects of energy metabolism, protein degradation and the immune system and add further weight to these pathways as potential therapeutic targets in Alzheimer's disease.
New state records for 49 species of Eucnemidae (Coleoptera) are reported throughout the United States and a single species is newly reported from Utah. Diagnostic remarks are offered for Xylophilus crassicornis Muona and distributional observations are discussed for Dirrhagofarsus lewisi. The importance of retaining by-catch from statewide, regional, and national surveys for future studies is also discussed.
A new genus and four new species of false click beetles
(Coleoptera: Eucnemidae) from Southeast Asia
(2015)
A new genus and four new species of false click beetle (Coleoptera: Eucnemidae) are described. Bermilloides new genus is described from Bornean Malaysia. New species are: Calyptocerus iridis new species (Philippines), Bermilloides lumawigi new species (Malaysia), Spinifornax elongatus new species (Malaysia) and Ceratus antennatus new species (Thailand). Dorsal and ventral habitus, as possible, for each species are illustrated.
Male aedeagi are illustrated for Calyptocerus iridis and Ceratus antennatus. A new key is provided for Calyptocerus species in Southeast Asia.
A primitive subfamily of false click beetles (Coleoptera: Eucnemidae: Phlegoninae) distributed primarily in the Neotropical region is revised. Euryphlegon gen. nov. is described from Belize in Central America. New species include: Phlegon chiriquiensis sp. nov. (Panama), Phlegon panamensis sp. nov. (Panama), Euryphlegon jacqueschassaini sp. nov. (Panama) and Euryphlegon parallelus sp. nov. (Belize). Phlegon herculeanus (Lacordaire) stat. res. is resurrected from synonymy with Phlegon buqueti Laporte. One new combination is proposed: Euryphlegon degallieri (Muona) (Phlegon). Based on a number of observed external character traits, Euryphlegon is placed in Orodotini Muona, 1993 within Macraulacinae Fleutiaux, 1922. Identifi cation keys are provided for species of Phlegon and Euryphlegon in the Neotropical region. The relationships among Phlegon, Euryphlegon, Euryptychus LeConte and other groups within Echthrogasterini Cobos, 1964 and Orodotini are discussed.
Six new species of false click beetle (Coleoptera: Eucnemidae) are described. These new species are: Fornax dixiensis sp. nov. (Florida, USA), Dromaeolus comayaguiensis sp. nov. (Honduras), Asiocnemis bicolor sp. nov. (Ecuador), Miruantennus chinensis sp. nov. (Yunnan prov., China), Miruantennus cuneiformis sp. nov. (Malaysia) and Nematodes africanus sp. nov. (Côte d’Ivoire). Identifi cation keys are provided for species of Fornax in the Nearctic ecozone and Miruantennus in the Palearctic and Indo-Malayan ecozones. A new key to include all the genera within the tribe Nematodini Leiler is also provided.
Descriptions and illustrations of the triungulin, 5th instar, and prepupal larval forms for Nematodes penetrans (LeConte, 1852) (Coleoptera: Eucnemidae: Macraulacinae: Nematodini) are given. The descriptions are based on triungulins collected in a plastic vial as well as 5th instars and prepupal larval stages collected from hard sections of sugar maple (Acer saccharum Marshall; Aceraceae) logs and limbs. Adults were reared from those pieces placed in plastic bags. Biological information is provided, based on literature search and personal observations.
Comparative studies between larvae of N. penetrans and the European species, Nematodes fi lum (Fabricius, 1801) along with other Nearctic larval forms are briefl y discussed. This discovery represents the fi rst larval description for the genus in the Nearctic region.
Fifth instars for eight of the nine species of Microrhagus Dejean (Coleoptera: Eucnemidae: Melasinae:
Dirhagini), all endemic in the Nearctic region, are described and illustrated. Biological information is provided, along with a brief discussion of the larval morphology among the eight Nearctic species of Microrhagus. Adult descriptions
are provided for four new species. These new species include Microrhagus breviangularis new species, Microrhagus carinicollis new species, Microrhagus lecontei new species and Microrhagus opacus new species.
A checklist and identifi cation keys for both adults and most known larvae are provided.
Descriptions and illustrations of the fi fth instar and prepupal larval stages of Stethon pectorosus LeConte, 1866 (Coleoptera: Eucnemidae: Eucneminae: Mesogenini) are provided. These are the fi rst larval descriptions for the genus Stethon LeConte within the subfamily Eucneminae in the Nearctic region. Biological information is provided and comparison with larval morphology of other Eucnemidae is briefl y discussed.
Microrhagus brunneus, new species (Coleoptera: Eucnemidae: Melasinae: Dirhagini) is described from Arkansas, Indiana, Kentucky, Louisiana, North Carolina, Oklahoma and Wisconsin. Dorsal, ventral and lateral habitus, along with male aedeagus are illustrated and a new key is provided to distinguish the new species from the four other Microrhagus species in the region.
New state records for 33 species of Eucnemidae (Coleoptera) are reported from the eastern United States based on the examination and identifications of specimens from four institutional and personal collections over the past several years. Images of 12 eucnemid species are also provided.
ZooBank registration. urn:lsid:zoobank.org:pub:DAFE70DF-394F-4ECF-A518-3EF5DD8B8B6F
The Nearctic species of Fornax Laporte are reviewed. Three species are redescribed, and six new species are described mainly from southeastern United States. The new species are F. appalachiensis, F. convexicollis, F. floridana, F. lucidicollis, F. melsheimeri and F. parallelicollis. A neotype is designated for Hylochares bicolor Melsheimer, with notes on its purpose. Each species is diagnosed and imaged. A new identification key is provided for all known species of Fornax present in the Nearctic region, replacing previous Nearctic species keys of Muona (2000) and Otto (2017).
Descriptions of two new species of false click beetles (Coleoptera: Eucnemidae) from the Bahamas
(2018)
Specimens of Eucnemidae collected in the Bahamas were re-evaluated following initial identifications completed in 2007. Two new species of false click beetle (Coleoptera: Eucnemidae) are described from several islands in the Bahamas. These new species are: Golbachia rufa sp. nov. and Fornax bahamiensis sp. nov. Diagnostic differences are noted for each species and compared with similar species found in both Cuba and the United States.
Descriptions of two new elateroid beetles (Coleoptera: Eucnemidae, Elateridae) from Burmese amber
(2019)
Two new elateroid taxa are described from amber deposits excavated from the northern region of Myanmar. Two genera, Cenomana gen. nov. (Coleoptera: Eucnemidae), and Cretopityobius gen. nov. (Coleoptera: Elateridae) are described for the first time from Burmese amber. The following new species are described: Cenomana clavata sp. nov. and Cretopityobius pankowskiorum sp. nov. Each new species is diagnosed and illustrated.
New records for a new species and other exotic Dirrhagofarsus Fleutiaux (Coleoptera: Eucnemidae: Melasinae: Dirhagini) species are reported from throughout much of the northeastern and southern areas of the United States. Dirrhagofarsus brevis, new species, is hereby described in this study. Two other exotic species, Dirrhagofarsus modestus (Fleutiaux) and Dirrhagofarsus unicolor (Hisamatsu), new country records, are redescribed and diagnosed as they were compared with other Dirrhagofarsus species present in the Nearctic region. All Dirrhagofarsus species in this study are imaged, highlighting essential character states to facilitate better diagnosis in conjunction to the new identification key provided in this study.
ZooBank registration. urn:lsid:zoobank.org:pub:24DCE05F-14CE-465B-AB11-A2F34012FAB6
Abstract. More than 1300 specimens of Eucnemidae collected from Heredia Province in Costa Rica during the 1990s Arthropods of La Selva (ALAS) survey were studied from 2018 through 2022. One new genus of false click beetle, Absensiugum Otto, Muona and Córdoba-Alfaro, is described. Nematodes teres Horn, from the Nearctic and Caribbean regions, is transferred to this new genus to form Absensiugum teres, new combination. Sixteen new species of false click beetle (Coleoptera: Eucnemidae) are described from Costa Rica. These new species are: Adelothyreus brevis, Adelothyreus costaricensis, Adelothyreus totus, Quirsfeldia stethonoides, Lacus pectinatus, Maelodrus costaricensis, Onichodon confluentus, Onichodon rufus, Isarthrus striatus, Absensiugum brunneum, Dromaeolus americanus, Dromaeolus brunneus, Dromaeolus herediensis, Dromaeolus holdridgei, Deltometopus bicolor and Nematodes apicalis. Three additional records outside of the Heredia Province from the Osa Peninsula and Panama for Lacus pectinatus are included in this study. Identification keys are provided for species of Adelothyreus Chevrolat, Onichodon Newman, Dromaeolus Kiesenwetter, Deltometopus Bonvouloir and Nematodes Berthold in Costa Rica. Diagnostic differences are briefly noted for each species within the Neotropical region. A list of Eucnemidae from Heredia Province is provided.
ZooBank registration. urn:lsid:zoobank.org:pub:C1D5B819-A964-4679-B090-84CDBBC59D6A
Thirteen new fossil eucnemid taxa (Coleoptera: Elateroidea) are described from amber deposits excavated from the vicinity of Santiago, Dominican Republic. Two new genera, Mioxylobius and Paleoquirsfeldia are described. The following 13 new species are described from Dominican amber: Mioxylobius bicolor, Balistica serrulata, Paleoquirsfeldia epicrana, Dyscharachthis dominicana, Idiotarsus poinari, Euryptychus antilliensis, Euryptychus hispaniolus, Plesiofornax caribica, Fornax dominicensis, Fornax serropalpoides, Dromaeolus argenteus, Nematodes miocenensis and Nematodes thoracicus. Each new species are both diagnosed and illustrated. Calyptocerus Guérin-Méneville and Lissantauga Poinar are shown to be congeneic, resulting in a new combination: Calyptocerus epicranis (Poinar, 2013). Summaries of fossil eucnemid discoveries, highlighting differing hypothesis of prehistoric Caribbean island formations/speciation, accounts of ancient Dominican Republic environmental conditions and Dominican Republic amber are provided.
ZooBank registration. urn:lsid:zoobank.org:pub:48A76A23-E48B-46B5-8A35-A27DD6134B6D
Three species of false click beetles (Coleoptera: Eucnemidae) are added to the Nearctic fauna. One new species, Isorhipis bicolor, is described from a small series collected in Florida, U.S.A. Eighteen specimens collected from Georgia were identified as Dyscharachthis amplicollis (Fleutiaux), new U.S.A. records for a species previously taken from Japan and Southeast Asia. Examination of a series of eucnemids collected by Kyle Schnepp in Florida allowed me to revisit the Deltometopus fauna in eastern North America. Antennal structures present in a series of male specimens in the loan and past examined specimens are definitive enough to resurrect Deltometopus ereptus Bonvouloir, status restored, from synonymy with Deltometopus amoenicornis (Say). Species identification keys are provided for Deltometopus Bonvouloir and Isorhipis Boisduval and Lacordaire in the Nearctic region. Diagnostic differences are briefly noted for each of the three newly added species found in the United States. Images of three species and the related D. amoenicornis are provided.
ZooBank registration. urn:lsid:zoobank.org:pub:30F462F1-966F-4A4F-9D10-BF967AED6574
Eucnemis Ahrens, 1812 (Coleoptera: Eucnemidae: Eucneminae: Eucnemini) is reviewed from the Nearctic region. Eucnemis americanus Horn is redescribed and illustrated and a new species, Eucnemis piceous Muona and Otto, is described and illustrated from Ontario, Canada and the United States from Wisconsin south to Kentucky, east to Massachusetts and West Virginia, north to Connecticut and Rhode Island. Thus, E. americanus is restricted to the western coastline of northern North America from northern California to northern Washington. A key is provided for the two species.
ZooBank registration. urn:lsid:zoobank.org:pub:00D66817-BDB5-4AEF-B703-CFA479510B81
The Neotropical eucnemid genus, Dyscolotaxia Horn, is revised following the examination of specimens from five collections, examination of the published original description of Plesiofornax tetratoma Chassain, and from images provided by Fernanda Salazar-Buenaño (QCAZI). Dyscolotaxia championi Horn is redescribed with included descriptions of the male genitalia and a female specimen. Three new species of false click beetles (Coleoptera: Eucnemidae) are described from the Neotropical region. These new species are: Dyscolotaxia chiriquiensis (Panama), Dyscolotaxia hispaniolensis (Dominican Republic) and Dyscolotaxia picea (Ecuador). Amazotaxia new genus is described from South America for Plesiofornax tetratoma Chassain, creating Amazotaxia tetratoma (Chassain) new combination. Morphology of both Dyscolotaxia and Amazotaxia in relation to Pleisofornax Cocquerel are reviewed along with biogeographical hypotheses for these groups. An identification key is provided for species of Dyscolotaxia in the Neotropical region. Images for all species of Dyscolotaxia and Amazotaxia are provided.
Identifications of recently collected Eucnemidae (Coleoptera: Elateroidea) borrowed from two collections have resulted in the discovery of two new species: Entomophthalmus abbreviatus Otto (Cuba) and Trigonopleurus cordobaalfaroi Otto (Guatemala and Louisiana, USA). Images of the two newly described species along with two New World Entomophthalmus Bonvouloir species for comparative purposes are included.
ZooBank registration. urn:lsid:zoobank.org:pub:E83B2AC6-33ED-4680-8F2E-4E455A26D4C8
Abstract. New state records for 35 species of Eucnemidae (Coleoptera: Elateroidea) are reported from the eastern United States based on examination and identification of specimens from several institutional and two private collections in the last year. Images of 18 eucnemid species are provided.
ZooBank registration. urn:lsid:zoobank.org:pub:59455AAD-A59A-49BF-BFDE-1C7AD4B232FE