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The classification of the Languriidae is reviewed and a catalogue of the 98 described genera is provided. Salient adult characters and comments on the monophyly are discussed for each family group. Notes on the taxonomic status of genera are included and type species are designated for Glisonotha Motschulsky (Glysonotha setosa Motschulsky), Lacertobelus Gorham (Lacertobelus dentipes Gorham), Leptolanguria Fowler (Languria longicollis Fowler), Loberolus Grouvelle (Loberolus agilis Grouvelle), Ortholanguroides Fowler (Ortholanguroides egensis Fowler), and Philophlaeus Germain (Philophlaeus aeneus Germain). Two generic names proposed are Slipinskiella, new name (type species: Languria dimidiata Guérin-Méneville; fifty new combinations) and Crowsonguptus, new name (type species: Coelocryptus mexicanus Sharp; four new combinations). One specific name is proposed: Hapalips investigatus new name (for Hapalips fuscus (Lea) new combination, nec Hapalips fuscus Reitter). New generic synonymies are given as follows: Cathartocryptus Sharp (= Xenoscelinus Grouvelle; seven new combinations), Isolanguria Lea (= Hapalips Reitter; one new combination) and Tetraphala Sturm (= Tetralanguria Crotch, = Tetralanguroides Fowler, = Metabelus Gorham; twenty three new combinations). The genera Stenodina Fairmaire and Fitoa Dajoz are transferred from Endomychidae to Languriidae. The species name Pachylanguria paivae Wollaston is corrected to Pachylanguria paivai.
The 12 genera of the Thalycra complex are reviewed, diagnosed, and keyed. The group is related to the Pocadius complex (based on larval and adult morphology) and is characterized by the following adult characters in combination: body form elongate and convex, pronotal and elytral margins narrowly explanate, vestiture of setae relatively sparse, length of antennomere 11 smaller than 9 and 10 combined, and metacoxae approximate with a moderately narrow intercoxal process. Three genera are described as new: Pocadiolycra Kirejtshuk and Leschen, gen. nov. (type species: Pocadiolycra peruensis Kirejtshuk and Leschen, sp. nov.; P. guyanaensis Kirejtshuk, sp. nov.), Tagmalycra Kirejtshuk and Leschen, gen. nov. (type species: Tagmalycra ashei Kirejtshuk and Leschen, sp. nov.) and Thalycrinella Kirejtshuk, gen. nov. (type species: Neothalycra latitibialis Audisio and Kirejtshuk, 1983), The species Quadrifrons castaneus Blatchley, 1916 (= Cychramus zimmermani Horn 1879, new synonymy), Pocadionta dentipes (Grouvelle, 1898), and Pleuroneces montanus Olliff, 1891 are redescribed. Biological information is summarized for each genus while fungal host relationships are emphasized. Members of Thalycra Erichson, and possibly Quadrifrons Blatchley, are specialists on hypogean fungi while the related genera Pocadiolycra and Tagmalycra are specialists on Agarieaceae. New New Zealand records for the species Thalycrodes australis (Blackburn) are provided.
The Neotropical genus Lybanodes Gorham is defined and six new species are described: L. bicolor Skelley (Peru and Brasil), L. lescheni Skelley (Ecuador), L. rostratus Skelley (Costa Rica), L. sasquatch Skelley (Costa Rica and Panama), L. similis Skelley (Colombia), and L. stigmatus Skelley (Peru). Larvae of L. bicolor, L. castaneus, and L. lescheni are described. Illustrations and keys are provided to aid in identification of both larvae and adults. A cladistic analysis is presented. Fungal host use and specializations are discussed.
A new bark-gnawing beetle genus Sinopeltis gen. nov., with two species (S. jurrasica sp. nov. (type species) and Sinopeltis amoena sp. nov.), is described based on two well-preserved impression fossils. Specimens were collected from the Middle Jurassic Jiulongshan Formation in Daohugou Village, Shantou Township, Ningcheng County, Inner Mongolia, China from a lacustrine paleoenvironment, making it the oldest fossil of the family. Sinopeltis is placed into Peltinae incertae sedis.
A new genus of Prionoceridae, Idgiaites gen. nov. (type species: I. jurassicus sp. nov.), is described and illustrated from a well-preserved impression fossil from the Middle Jurassic Jiulongshan Formation collected at Daohugou Village, Shantou Township, Ningcheng County, Inner Mongolia, China. This is the first representative of Prionoceridae described from the Mesozoic era, and the presence of this family in the Jurassic indicates that cleroids were quite diverse during the early evolution of polyphagan beetles. The occurrence of plants in the same Formation may indicate that Idgiaites like it’s modem confamilials were pollen-feeding.A new genus of Prionoceridae, Idgiaites gen. nov. (type species: I. jurassicus sp. nov.), is described and illustrated from a well-preserved impression fossil from the Middle Jurassic Jiulongshan Formation collected at Daohugou Village, Shantou Township, Ningcheng County, Inner Mongolia, China. This is the first representative of Prionoceridae described from the Mesozoic era, and the presence of this family in the Jurassic indicates that cleroids were quite diverse during the early evolution of polyphagan beetles. The occurrence of plants in the same Formation may indicate that Idgiaites like it’s modem confamilials were pollen-feeding.
Two enigmatic genera of Trogossitidae are described and illustrated from well-preserved impression fossils from the Middle Jurassic Jiulongshan Formation collected at Daohugou Village, Shantou Township, Ningcheng County, Inner Mongolia, China. Both new genera, Marginulatus gen. nov. (type species M. venustus sp. nov.) and Latitergum gen. nov. (type species L. glabrum sp. nov.) are placed in Trogossitidae incertae sedis because they have a mixture of characters that do not allow for them to be easily placed in the current classification of Trogossitidae.
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