@article {148, title = {A new species and lectotype designations for New Zealand Hydora (Elmidae: Larainae) with a world checklist}, journal = {New Zealand Entomologist}, volume = {38}, year = {2015}, pages = {38-57}, abstract = {

The family Elmidae is represented by a single genus Hydora Broun in New Zealand; they are the most abundant Coleoptera encountered in streams there. There are nine previously described species of Hydora, six from New Zealand, to which we add Hydora musci sp. nov. based on larvae and adults. Hydora musci can be distinguished from all remaining New Zealand species by the following characters: adult with pronotum with weak lateral transverse depression, pronotal lateral carina incomplete extending from posterior margin approximately two-thirds anteriorly, sublateral longitudinal carina less than one-third of the average carina length; elytral punctate striae poorly developed, elytral setae no longer than one-third width of eye, outer surface of mesotibia polished, surface of metatibia not polished; larva with thoracic and abdominal segments bearing single dorsal and lateral protrusions (often reduced), tooth absent on anterior margin of head, laterotergites complete on abdominal segments I and II, complete to incomplete on segments III to IV. Most specimens of H. musci were found in stable tributary streams containing bryophytes in the Arnold River Catchment 31 km inland from Greymouth on the West Coast of the South Island. Larvae are grazers that co-exist with adults at the stream margins and in splash zones associated with bryophytes attached to large boulders. A catalogue of the world Hydora species is included, and lectotypy is established for the following New Zealand species: Hydora subaenea Broun, Hydora picea (Broun), Hydora obsoleta Broun, Hydora nitida Broun, Hydora lanigera Broun and Hydora angusticollis (Pascoe).

}, keywords = {aquatic insects; lotic habitat; setal morphology; streams}, doi = {10.1080/00779962.2014.963910}, author = {P. Lambert and C.A. Maier and R.A.B. Leschen} } @article {146, title = {Hexanchorus bifurcatus sp. nov., a new tepui riffle beetle (Coleoptera: Elmidae: Larainae) from Tafelberg, Suriname}, journal = {Zootaxa}, volume = {3895}, year = {2014}, pages = {137{\textendash}143}, abstract = {

Here we present the first published record of a laraine elmid from Suriname, which represents a new species \– Hexanchorus bifurcatus sp. nov. Specimens were collected from the summit of Tafelberg, a table mountain near the Wilhelmina Range of Suriname. This species can be distinguished from all other Hexanchorus by the bifurcate elytral apices and median projection of the third abdominal ventrite of the female, as well as the distinctive male genitalia. Habitus photos, illustrations of the genitalia, a distribution map, notes on habitat, and comparative diagnoses are provided.

}, keywords = {aquatic insects, Guiana Shield, Neotropical region, South America, Table Mountain, water beetle}, doi = {10.11646/zootaxa.3895.1.9}, author = {C.A. Maier and A.E.Z. Short} } @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} }