@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 {182, title = {Ancyronyx lianlabangorum sp. nov., a new spider riffle beetle from Sarawak, and new distribution records for A. pulcherrimus Kodada, J{\"a}ch \& {\v C}iampor based on DNA barcodes (Coleoptera, Elmidae)}, journal = {Zookeys}, volume = {1003}, year = {2020}, pages = {31{\textendash}55}, abstract = {

Ancyronyx lianlabangorum sp. nov. (Coleoptera, Elmidae), a new spider riffle beetle from the Kelabit Highlands (Sarawak, northern Borneo), is described. Illustrations of the habitus and diagnostic characters of the new species and the similar, polymorphic A. pulcherrimus Kodada et al. are presented. Differences to closely related species, based on COI nucleotide sequences and morphological characters, are discussed.\ Ancyronyx pulcherrimus is here recorded from Sarawak for the first time, based on DNA barcoding.

}, keywords = {Ancyronyx, Coleoptera, Elmidae, taxonomy, variability}, doi = {https://doi.org/10.3897/zookeys.1003.55541}, author = {J. Kodada and M.A. J{\"a}ch and H. Freitag and Z. {\v C}iamporov{\'a}-Za{\v t}ovi{\v c}ov{\'a} and K. Goffov{\'a} and D. Selnekovi{\v c} and F. {\v C}iampor Jr} } @article {181, title = {Notes on Stenhelmoides and description of the true male genitalia of S. strictifrons Grouvelle, 1908 (Coleoptera: Elmidae)}, journal = {Acta Amazonica}, volume = {50}, year = {2020}, pages = {317-326}, abstract = {

The genus Stenhelmoides comprises 15 species spread over all Central and South America and its greatest species richness is clearly associated with Amazonian regions. Based on examination of type specimens and additional material, we describe and illustrate the true male genitalia of Stenhelmoides strictifrons, which had until now been incorrectly illustrated in the literature. We also report new records of the genus Stenhelmoides from Brazil and Guyana. In addition to pictures of the species\’ habitus, we provide pictures of the type specimens of Stenhelmoides grandis, S. grouvellei, S. guyanensis; S. strictifrons and S. submaculus. Based on the International Code of Zoological Nomenclature, we recognize additional paralectotypes for S. guyanensis and for S. grouvellei.

}, keywords = {aquatic insects, morphology, Neotropics, riffle beetles, taxonomy}, doi = {https://doi.org/10.1590/1809-4392202002791}, author = {A.S. Fernandes and T.T.S. Polizei and R. Boldrini} } @article {180, title = {Two new species of the genus Ancyronyx Erichson, 1847 from the island of Negros, Philippines (Insecta, Coleoptera, Elmidae)}, journal = {Tijdschrift voor Entomologie}, volume = {163}, year = {2020}, pages = {1-18}, abstract = {

Two new Elmidae species from the Visayan island of Negros, Philippines, Ancyronyx berghaueri sp. n. and Ancyronyx negrosensis sp. n., are described utilizing an integrative taxonomic approach. The new species are characterized by the color of the femora, body size, and the male and female genitalia. Their habitus and diagnostic characters are described and illustrated in detail with microscopic images and digital line drawings. The morphological species delimitation is supplemented by and congruent with COI and cob mtDNA data of several known species of Ancyronyx from the Philippines and Borneo. The material was obtained in connection with a student thesis, the sampling program of the Ateneo de Manila University Biodiversity Laboratory and from repositories. Specimens were collected at altitudes between 30 m and 800 m above sea level in pristine and slightly disturbed habitats. Their suitability as bioindicators and the use of cob sequences for integrative taxonomic studies are briefly discussed

}, keywords = {biodiversity discovery, cob, COI, integrative taxonomy, mtDNA barcode, spider riffle beetle, Visayas}, doi = {https://doi.org/10.1163/22119434-20192087}, author = {M.R. Sabordo and E. Delocado and H. Freitag} } @article {166, title = {Two new species of the genus Zaitzevia Champion, 1923 from China (Coleoptera: Elmidae: Macronychini)}, journal = {Zootaxa}, volume = {4852}, year = {2020}, pages = {231{\textendash}238}, abstract = {

Two new riffle beetles of the genus Zaitzevia Champion, 1923: Z. chenzhitengi sp. nov. from Sichuan Province and Z. xiongzichuni sp. nov. from Yunnan Province are described from China. Habitus and other diagnostic features of the new species are described and illustrated. Habitat information and collection data of the new species are also provided.

}, keywords = {China, Elmidae, Macronychini, new species, Sichuan Province}, doi = {https://doi.org/10.11646/zootaxa.4852.2.8}, author = {R.-X. Jiang and S. Wang} } @article {165, title = {Hexacylloepus Hinton, 1940 rises again; 18 new species of a neglected genus (Coleoptera: Byrrhoidea: Elmidae)}, journal = {Zootaxa}, volume = {4819}, year = {2020}, pages = {006{\textendash}048}, abstract = {

The genus Hexacylloepus extends from the Neotropical region to the southwestern United States of America. At present, 25 species are known from 20 countries, with no new species proposed since 1972. In this paper, we describe and illustrate 18 new species (H. barrae; H. calori; H. casariae; H. froehlichi; H. geiseri; H. grandis; H. iassu; H. keitai; H. maierae; H. manauara; H. metapa; H. phalluspilosus; H. shorti; H. taylorae; H. thoracica; H. tibialis; H. ubirajarai; H. zaninii), from eight countries and give the first records of the genus from Suriname and Guyana.

}, keywords = {aquatic beetles, morphology, Neotropical, riffle beetles, taxonomy}, doi = {https://doi.org/10.11646/zootaxa.4819.1.2}, author = {T.T.S. Polizei and M.V.L. Barclay and P.d.C. Bispo} } @article {164, title = {The Neotropical genus Portelmis Sanderson, 1953 (Coleoptera: Elmidae): three new species, new records and updated key}, journal = {Zootaxa}, volume = {4810}, year = {2020}, pages = {452{\textendash}467}, abstract = {

Elmidae is one of the most diverse families of aquatic beetles, with more than 1500 species in 151 genera. The Neotropical genus Portelmis formerly comprised five species known from Central and northern South America, divided into two species groups. Three new Brazilian species from the nevermanni group are described and illustrated here: Portelmis vanini sp. nov., Portelmis krolowi sp. nov. and Portelmis fusariae sp. nov. New species records for the North, Central-West and Southeast of Brazil are presented.We also provide first SEM images and an updated key for Portelmis species.

}, keywords = {aquatic insects, riffle beetles, South America, taxonomy}, doi = {https://doi.org/10.11646/zootaxa.4810.3.3}, author = {T.T.S. Polizei and A.S. Fernandes} } @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 {162, title = {Austrolimnius cleidecostae, a new species of riffle beetle (Coleoptera: Elmidae) from Brazil with habitat notes and updated key of the Brazilian species of the genus}, journal = {Pap{\'e}is Avulsos de Zoologia}, volume = {60}, year = {2020}, pages = {1-10}, abstract = {

Austrolimnius cleidecostae sp. nov. is one of the smallest species of Elmidae from the Neotropical region. The new species is described and illustrated based on male and female specimens. This species represents the first record in Elmidae of mandibles with an articulated, sclerotized process on inner subapical edge. The specimens were collected from streams in the Atlantic rainforest of S\ão Paulo and Santa Catarina, and habitat notes are given. An updated key for the Austrolimnius Carter \& Zeck, 1929 of Brazil is provided. Austrolimnis browni Hinton, 1971 and A. musgravei Hinton, 1939 are recorded for the first time from Brazil.

}, keywords = {aquatic beetles, Neotropical, South America, Streams, taxonomy}, doi = {http://doi.org/10.11606/1807-0205/2020.60.special-issue.12}, author = {T.T.S. Polizei and L.d.S.M. Costa and P.d.C. Bispo} } @article {161, title = {Ancyronyx clisteri, a new spider riffle beetle species from Borneo, redescription of A. sarawacensis J{\"a}ch including a description of the larva and new distribution data for A. procerus J{\"a}ch using DNA barcodes (Coleoptera, Elmidae)}, journal = {Zookeys}, volume = {912}, year = {2020}, pages = {25{\textendash}64}, abstract = {

Ancyronyx clisteri sp. nov. (Coleoptera, Elmidae) a new spider riffle beetle discovered from northern Borneo (Brunei; Sabah and Sarawak, Malaysia) and the larva of Ancyronyx sarawacensis J\äch are described. Illustrations of the habitus and diagnostic characters of the new species and the similar and highly variable A. sarawacensis are presented. Differences to closely related species, based on DNA barcodes and morphological characters, are discussed. Association of the larva and the imago of A. sarawacensis, and the occurrence of Ancyronyx procerus J\äch in Peninsular Malaysia and Sabah are confirmed by using COI mtDNA sequences.

}, keywords = {Brunei, COI mtDNA sequences, integrative taxonomy, Malaysia: Sabah and Sarawak, Spider Water Beetle, variability}, doi = {https://doi.org/10.3897/zookeys.912.47796}, author = {J. Kodada and M.A. J{\"a}ch and H. Freitag and Z. {\v C}iamporov{\'a}-Za{\v t}ovi{\v c}ov{\'a} and K. Goffov{\'a} and D. Selnekovi{\v c} and F. {\v C}iampor Jr} } @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 {159, title = {A new species of the genus Graphelmis DEL{\`E}VE, 1968 from China (Coleoptera: Elmidae)}, journal = {Zootaxa}, volume = {4728}, year = {2020}, pages = {483{\textendash}488}, abstract = {

Graphelmis dulongensis sp. nov. is described from Yunnan, China. Photos of habitus and male genitalia are given.

}, keywords = {China, new species, riffle beetles, taxonomy, Yunnan}, doi = {https://doi.org/10.11646/zootaxa.4728.4.7}, author = {X. Dong and D. Bian} } @article {158, title = {A new species of Macrelmis Motschulsky, 1859 (Coleoptera: Elmidae) and new records of Elmidae from Roraima State, northern Brazil}, journal = {Zootaxa}, volume = {4718}, year = {2020}, pages = {277{\textendash}284}, abstract = {

A new species of Macrelmis Motschulsky, 1859 (Macrelmis rodrigoi sp. nov.) is described and illustrated based on specimens found in mountainous areas of the northern Roraima State, Brazil. Pagelmis amazonica Spangler, 1981, Potamophilops bostrychophallus Maier, 2013 and Stegoelmis geayi Spangler, 1990 are recorded in Brazil for the first time and new records for Gyrelmis obesa Hinton, 1940, Macrelmis thorpei Hinton, 1945 and Neolimnius palpalis Hinton, 1939 are presented.

}, keywords = {aquatic insects, entomology, rifle beetles, South America, taxonomy}, doi = {https://doi.org/10.11646/zootaxa.4718.2.9}, author = {M.d.L.S.d. Almeida and A.S. Fernandes and R. Boldrini} }