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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.
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
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 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
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).
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.
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.
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
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.