Crystal A. Maier

Hypsilara royi gen. n. and sp. n. (Coleoptera, Elmidae, Larainae) from Southern Venezuela, with a revised key to Larainae of the Western Hemisphere.

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.

A revision of the Larainae (Coleoptera, Elmidae) of Venezuela, with description of nine new species

Abstract The species of the riffle beetle subfamily Larainae occurring in Venezuela are revised. Examination of 756 specimens yielded 22 species in nine genera occurring throughout the country. Seven species are newly recorded from the country: Phanoceroides sp. 1, Phanocerus clavicornis Sharp, 1882, Phanocerus congener Grouvelle, 1898, Pharceonus volcanus Spangler & Santiago-Fragoso, 1992, Disersus dasycolus Spangler & Santiago-Fragoso, 1992, Disersus chibcha Spangler & Santiago-Fragoso, 1987, and Disersus inca Spangler & Santiago-Fragoso, 1992. Nine species are found to be new to science, which are here described: Hexanchorus dentitibialis sp. n., H. falconensis sp. n., H. flintorum sp. n., H. homaeotarsoides sp. n., H. inflatus sp. n., Phanocerus rufus sp. n., Pharceonus grandis sp. n., Pharceonus ariasi sp. n., Potamophilops bostrychophallus sp. n. Additionally, a key to species, distribution maps, and photographs and genitalia illustrations are provided for all species.

A new species and lectotype designations for New Zealand Hydora (Elmidae: Larainae) with a world checklist

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). http://zoobank.org/urn:lsid:zoobank.org:pub:8EB6FA4E-BD27-4EAD-8113-977518118CBD

Review of the Lutrochidae (Coleoptera) of the Guianas and Lesser Antilles, with description of four new species

The species of Lutrochidae from the Guianas, and the Lesser Antilles are reviewed, including the first reports of the family from Guyana, Suriname, and Grenada. Four species are described as new: Lutrochus funkae n. sp. and L. wao n. sp. from Guyana and French Guiana, L. grenadensis n. sp. from Grenada, and L. leeanneae n. sp. from Suriname. Photographs, genitalia illustrations, and distribution maps are provided for all species, and habitat photos and notes are presented for the species for which they are available.

Figures 7 – 11. Lutrochus Grenadensis N In Review Of The Lutrochidae (Coleoptera) Of The Guianas And Lesser Antilles, With Description Of Four New Species

FIGURES 7 – 11. Lutrochus grenadensis n. sp.: 7. Habitus, dorsal view; 8. Habitus, ventral view; 9. Habitus, lateral view; 10. Diagrammatic view of the protibia and tarsus, showing areas of dense pubescence (pubescent areas shaded in gray); 11. Aedeagus, dorsal and lateral views (scale bar = 1.0 mm).

Figure 1 In Hexanchorus Bifurcatus Sp. Nov., A New Tepui Riffle Beetle (Coleoptera: Elmidae: Larainae) From Tafelberg, Suriname

FIGURE 1. Map of Northeastern South America showing collection localities of Hexanchorus bifurcatus n. sp. and H. angeli Lassova et al.