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A review of the Neotropical genus Bidessodes Regimbart, 1895 including description of four new species (Coleoptera, Adephaga, Dytiscidae, Hydroporinae, Bidessini).

ABSTRACT: The Neotropical genus Bidessodes Régimbart, 1895 is reviewed. Four new species are described, Bidessodes chlorus Miller, sp. n., Bidessodes erythros Miller, sp. n., Bidessodes leukus Miller, sp. n., and Bidessodes melas Miller, sp. n., bringing the total number of species in the genus to 20. A key to species is provided. Important diagnostic features are illustrated and described and distributions of all species based on examined specimens and published records are provided. Recognition of the subgenera of Bidessodes is not justified, and the two names Hughbosdineus Spangler, 1981 syn. n. and Youngulus Spangler, 1981 syn. n., described at the genus rank, are placed in synonymy with Bidessodes.

SUBMITTER: Miller KB

PROVIDER: S-EPMC5396571 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature

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A review of the Neotropical genus Bidessodes Régimbart, 1895 including description of four new species (Coleoptera, Adephaga, Dytiscidae, Hydroporinae, Bidessini).

Miller Kelly B KB

ZooKeys 20170222 658

The Neotropical genus Bidessodes Régimbart, 1895 is reviewed. Four new species are described, Bidessodes chlorus Miller, sp. n., Bidessodes erythros Miller, sp. n., Bidessodes leukus Miller, sp. n., and Bidessodes melas Miller, sp. n., bringing the total number of species in the genus to 20. A key to species is provided. Important diagnostic features are illustrated and described and distributions of all species based on examined spe ...[more]

PMID: 28435383

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New species of Bidessonotus Regimbart, 1895 with a review of the South American species (Coleoptera, Adephaga, Dytiscidae, Hydroporinae, Bidessini).

Project description:The South American species of the New World genus Bidessonotus Régimbart, 1895 are reviewed with descriptions of seven new species. This brings the total number of valid Bidessonotus species to 37, making it the largest Bidessini genus in the New World. The new species are Bidessonotus annaesp. n. (Venezuela), Bidessonotus josiahisp. n. (Venezuela), Bidessonotus palecephalussp. n. (Venezuela), Bidessonotus reductussp. n. (Venezuela), Bidessonotus septimussp. n. (Venezuela), Bidessonotus spinosussp. n. (Venezuela), and Bidessonotus valdezisp. n. (Guyana, Suriname). New distribution records are provided for many other South American Bidessonotus species. The main diagnostic features of Bidessonotus species are in the male genitalia, and these are illustrated for all South American species. Diagnostic features, distributions (including distribution maps), and additional comments are provided for all South American species.

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Novadessus viracocha, a new genus and species of Bidessini Sharp from Peru (Coleoptera, Adephaga, Dytiscidae, Hydroporinae).

Project description:Novadessus viracochagen. n. and sp. n. is described from Peru. The genus distinctly is characterized by having the following combination: (1) a transverse occipital line absent on the head; (2) the anterior clypeal margin not modified; (3) a pair of basal pronotal striae present; (4) the basal elytral stria absent; (5) the elytral sutural stria absent; (6) the elytron without longitudinal carinae; (7) the epipleuron without a transverse carina at the humeral angle; (8) the lateral lobes of the male aedeagus two-segmented; (9) the overall habitus elongate and oval, with lateral pronotal and elytral margins discontinuous; (10) without distinct denticles along the posterior margins of the abdominal sternites; (11) the male genitalia (both median lobe and lateral lobes) bilaterally symmetrical; and (12) the metatrochanter small relative to the metafemur, approximately 0.6 × the length of the metafemur. The genus is diagnostically similar to Fontidessus Miller and Spangler and Neobidessodes Hendrich and Balke, but is superficially more similar to Liodessus Guignot. The habitus and male genitalia are illustrated, and a distribution map is provided.

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Revision of the Neotropical diving beetle genus Hydrodessus J. Balfour-Browne, 1953 (Coleoptera, Dytiscidae, Hydroporinae, Bidessini).

Project description:The Neotropical diving beetle genus Hydrodessus J. Balfour-Browne, 1953 (Coleoptera: Dytiscidae: Hydroporinae: Bidessini) is revised. Thirty species are recognized. The following new species are described: Hydrodessus bimaculatus sp. n. (Venezuela), Hydrodessus brevis sp. n. (Venezuela), Hydrodessus concolorans sp. n. (Venezuela), Hydrodessus continuus sp. n. (Venezuela), Hydrodessus disjunctus sp. n. (Suriname), Hydrodessus fasciatus sp. n. (Brazil), Hydrodessus imparilis sp. n. (Ecuador), Hydrodessus keithi sp. n. (Brazil, Colombia, Ecuador), Hydrodessus kurti sp. n. (Suriname), Hydrodessus kylei sp. n. (Suriname, Venezuela), Hydrodessus laetus sp. n. (Venezuela), Hydrodessus latotibialis sp. n. (Peru), Hydrodessus maculatus sp. n. (Guyana, Venezuela), Hydrodessus morsus sp. n. (Venezuela), Hydrodessus palus sp. n. (Venezuela), and Hydrodessus tenuatus sp. n. (Suriname). The following new synonyms are established: Hydrodessus fragrans Spangler, 1985 = Hydrodessus biguttatus (Guignot, 1957) syn. n. and Hydrodessus robinae Spangler, 1985 = Hydrodessus octospilus (Guignot, 1957), syn. n. One species is transferred from Hydrodessus to Amarodytes Régimbart, Amarodytes soekhnandanae (Makhan, 1994), comb. n. Habitus photographs (dorsal and lateral) and photos of the ventral surfaces are provided for most species. Line drawings of male and female genitalia and other diagnostic features are also provided along with distribution maps.

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Review of the genus Fontidessus Miller & Spangler, 2008 (Coleoptera, Dytiscidae, Hydroporinae, Bidessini) with description of four new species.

Project description:The genus Fontidessus Miller & Spangler, 2008 (Coleoptera: Dytiscidae: Hydroporinae: Bidessini) is reviewed. The genus now includes seven species with three previously described, and four new species described here: F. microphthalmus Miller & Montano, sp. n.; F. bettae Miller & Montano, sp. n.; F. christineae Miller & Montano, sp. n., and F. aquarupe Miller & Montano, sp. n. Each species is diagnosed and described, including the previously known species, based on new specimens and new information. Habitus, male genitalia and other diagnostic features are illustrated for each species. A key to the seven species is provided. Fontidessus species are unique to hygropetric habitats in the Guiana Shield craton of northern South American.

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Description of the putative mature larva of the Neotropical genus Stenhelmoides Grouvelle (Coleoptera: Elmidae).

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