@article {187, title = {Description of larvae of Japanese Macronychini (Coleoptera: Elmidae: Elminae)}, journal = {Zootaxa}, volume = {4859}, year = {2020}, pages = {195{\textendash}227}, abstract = {

Larvae of 15 species of Macronychini, subfamily Elminae, belonging to the genera Sinonychus J\äch \& Boukal, Paramacronychus Nomura, Zaitzeviaria Nomura, Zaitzevia Champion, and Urumaelmis Sat\ô were described based on scanning electron microscope (SEM) observation. Larvae of eleven of these species, S. tsujunensis Yoshitomi \& Nakajima, Zaitzeviaria gotoi (Nomura), Zaitzeviaria brevis (Nomura), Zaitzeviaria kuriharai Kamite, Ogata \& Sat\ô, Zaitzevia elongata Nomura, Zaitzevia aritai Sat\ô, Zaitzevia yaeyamana Sat\ô, Zaitzevia awana (Kôno), Zaitzevia nitida Nomura, Zaitzevia tsushimana Nomura, and U. uenoi (Nomura) are described for the first time.

}, keywords = {aquatic beetle, Byrrhoidea, Dryopoidea, immature stage, Oriental Region, Palaearctic Region, riffle beetle}, author = {M. Hayashi and Y. Kamite} } @article {185, title = {A New, Sexually Dimorphic Species of Cylloepus Erichson from Brazil (Coleoptera: Elmidae)}, journal = {The Coleopterists Bulletin}, volume = {75}, year = {2021}, pages = {270{\textendash}274}, abstract = {

Cylloepus dimorphus Shepard, Sites, and Rodrigues, new species (Elmidae) is described from Brazil with a sexually dimorphic abdominal ventrite 5. Males have a protruding lobe on each side of the apex of ventrite 5. Females lack the lobes and are not distinguishable from congeners.

}, keywords = {Byrrhoidea, Neotropical, riffle beetle, taxonomy}, doi = {10.1649/0010-065X-75.1.270}, author = {W.D. Shepard and R.W. Sites and H.D.D. Rodrigues} } @article {184, title = {Potamophilops Grouvelle in French Guiana, with additional distributional records for the genus (Coleoptera, Elmidae, Larainae)}, journal = {Bulletin de la Soci{\'e}t{\'e} entomologique de France}, volume = {126}, year = {2021}, pages = {99-102}, abstract = {

Potamophilops bostrychophallus Maier, 2013, is reported from French Guiana, new country record. The genus has a peri-Amazonian distribution. New locality records are given for P. cinereus (Blanchard, 1841) and P. bragaorum Fernandes \& Hamada, 2012.

}, keywords = {Diversity, Guiana Shield, new country record, riffle beetle}, doi = {https://doi.org/10.32475/bsef_2157}, author = {W.D. Shepard and P. Queney} } @article {163, title = {Unexpected discovery of a new Podonychus species in Kyushu, Japan (Coleoptera, Elmidae, Elminae, Macronychini)}, journal = {Zookeys}, volume = {933}, year = {2020}, pages = {107{\textendash}123}, abstract = {

Podonychus gyobu sp. nov., a second species of the genus Podonychus J\äch \& Kodada, 1997, hitherto known only from Indonesia, is described from Kyushu, Japan. This new species is similar to P. sagittarius\ J\äch \& Kodada, 1997, but differs from it in the straight penis, arcuate 2nd labial palpomere, and in the 3rd antennomere being longer than wide. The endophallic structures and the larva of P. gyobu sp. nov. are described. A character matrix of the Macronychini genera and a key to the Japanese genera are provided.

}, keywords = {disjunct distribution, endophallus, larvae, new species, riffle beetle, SEM, taxonomy}, doi = {https://doi.org/10.3897/zookeys.933.48771}, url = {https://zookeys.pensoft.net/article/48771/}, author = {H. Yoshitomi and M. Hayashi} } @article {160, title = {Additional new species of Grouvellinus Champion 1923 (Insecta, Coleoptera, Elmidae) discovered by citizen scientists and DNA barcoded in the field applying a novel MinION-based workflow}, journal = {Journal of Natural History}, volume = {53}, year = {2020}, pages = {2593-2620}, abstract = {

Four new species, Grouvellinus nigerquadratus sp. nov., G. cruxniger sp. nov., G. luciaensis sp. nov., and G. borneensis sp. nov., are described from Borneo and illustrated in detail. Two additional species of the genus which remain undescribed are briefly diagnosed. The material was collected during Taxon Expeditions\’ field course which involved citizen scientists, students and taxonomists. Specimens were collected at altitudes between 270 m and 750 m above sea level using fine-meshed hand-nets and blacklight traps. The morphological species delimitation based on morphology was supplemented and congruent with mtDNA sequences which are the first DNA barcodes for the genus from Borneo. They were obtained in the field using a newly developed rapid and accurate MinION-based workflow. The inter \– and intraspecific genetic distances and the problems regarding cryptic species delimitation are discussed.

}, keywords = {Citizen science, nanopore sequencing, riffle beetle, taxon expeditions, taxonomy}, doi = {https://doi.org/10.1080/00222933.2019.1709669}, author = {H. Freitag and C. Molls and A.M. Bouma and J.M. Garces and M. Rossato and E. Cosentino and M. Delledonne} } @article {138, title = {Two new species of the genus Dryopomorphus Hinton, 1936 from China (Coleoptera, Elmidae)}, journal = {ZooKeys}, volume = {765}, year = {2018}, pages = {51{\textendash}58}, abstract = {

Two new species of the genus Dryopomorphus Hinton, 1936 are described from China: Dryopomorphus heineri sp. n. and D. ruiliensis sp. n. Habitus photographs and detailed line drawings of the male genitalia are provided.

}, keywords = {Dryopomorphus, Guangdong, riffle beetle, taxonomy, Yunnan}, doi = {10.3897/zookeys.765.24366}, url = {https://zookeys.pensoft.net/articles.php?id=24366}, author = {D. Bian and X. Dong and Y. Peng} } @article {85, title = {Hypsilara royi gen. n. and sp. n. (Coleoptera, Elmidae, Larainae) from Southern Venezuela, with a revised key to Larainae of the Western Hemisphere}, journal = {ZooKeys}, volume = {116}, year = {2011}, pages = {25-36}, abstract = {

Here we describe a new genus, for a new species of riffle beetle, Hypsilara royi gen. n. and sp. n., from the tepui Cerro de la Neblina in southern Venezuela. This new genus can be distinguished from all other laraine genera by its small size (ca. 4.5 mm) and the presence of a shallow, wide, V-shaped groove across the apical third of the pronotum. An updated key to the genera of Western Hemisphere Larainae is provided, along with information on habitat and collection methods for this taxon.

}, keywords = {aquatic insects, Cerro de Neblina, Guiana Shield, Neotropical region, riffle beetle, tepui}, author = {C.A. Maier and P.J. Spangler} } @article {84, title = {Elachistelmis gen. n. (Coleoptera: Elmidae: Elminae) from Suriname, with description of two new species}, journal = {Zootaxa}, volume = {3500}, year = {2012}, pages = {61-69}, abstract = {

Elachistelmis gen. n. is described for two new species of riffle beetle, E. tetramera sp. n., and E. sipaliwiniensis sp. n. from southwestern Suriname. This new genus can be distinguished from all other elmid genera by its small size (ca. 1.0\–1.2 mm), pronotum with sublateral carinae and lacking depressions, and the presence of a narrow band of plastron setae on the lateral edge of each elytron. Elachistelmis tetramera sp. n. is among the smallest recorded Elmini and possesses many characters associated with miniaturization, such as reduced tarsal formula and feathery wings with reduced venation. A key to species, scanning electron micrographs, and illustrations of the male genitalia are provided.

}, keywords = {Aquatic insect, miniaturization, Neotropical region, riffle beetle}, author = {C.A. Maier} } @article {79, title = {A new species of Stenelmis (Coleoptera: Elmidae) from South India}, journal = {International Journal of Environmental Biology}, volume = {6}, year = {2016}, pages = {24-28}, abstract = {

A new species of riffle beetle, Stenelmis pandiani sp.n. is described on the basis of male and female adults collected from South India. The morphological and molecular data confirm species assignment and distinguish as a new species.

}, keywords = {DNA barcoding, new species, riffle beetle, taxonomy}, author = {S. Anbalagan and M. Kannan and K. Rekha and M. Krishnan and G. Ponraman and S. Dinakaran} } @article {71, title = {Endophallic Structure of the Genus Zaitzeviaria Nomura (Coleoptera, Elmidae, Elminae), with Review of Japanese Species}, journal = {Elytra, Tokyo, New Series}, volume = {5}, year = {2015}, pages = {67-96}, abstract = {

The endophallus of the genus Zaitzeviaria is characterized by membranous sac with several bladders covered by spines. The endophallic structures of most members are observed in detail and their homologies are examined. Five Japanese members of the genus including a new species are reviewed: Z. sotai sp. nov., Z. ovata (Nomura), Z. brevis (Nomura), Z. gotoi (Nomura) and Z. kuriharai Kamite, Ogata et M. Sat\ô. Zaitzeviaria sotai sp. nov. is collected from Shimane and Tottori Prefectures including Oki Islands.

}, keywords = {comparative morphology, internal sac of aedeagus, Macronychini, riffle beetle}, author = {M. Hayashi and H. Yoshitomi} } @article {67, title = {The genus Portelmis Sanderson, 1953 (Coleoptera: Elmidae: Elminae): first report in Brazil, description of two new Amazonian species and species key for males}, journal = {Zootaxa}, volume = {2517}, year = {2010}, pages = {33-43}, abstract = {

The genus Portelmis Sanderson, 1953 and the species P. gurneyi Spangler, 1980 are reported for the first time in Brazil. Portelmis kinonatilis sp. nov. and P. paulicruzi sp. nov. are described and illustrated based on adult specimens collected in two different municipalities in the state of Amazonas, Brazil. Diagnoses and illustrations of all Portelmis species, and a taxonomic key to identify males are presented.

}, keywords = {aquatic insects, kinon, Neotropics, Portelmis, riffle beetle, taxonomy}, author = {A.S. Fernandes and M.I.S. Passos and N. Hamada} } @article {32, title = {A new species of Hintonelmis Spangler (Coleoptera: Elmidae: Elminae) from Central Amazonia, Brazil}, journal = {Zootaxa}, volume = {2353}, year = {2010}, pages = {43-48}, chapter = {43}, abstract = {

Hintonelmis anamariae sp. nov. is described and illustrated based on adult specimens collected in Presidente Figueiredo Municipality, Amazonas State, Brazil. This species can be distinguished from all other known Hintonelmis species by its dorsal color pattern and the morphology of the male genitalia.

}, keywords = {Elmidae, morphology, Neotropics, riffle beetle, taxonomy}, author = {A.S. Fernandes and M.I.S. Passos and N. Hamada} }