Placonotus

Placonotus is a genus of beetles in the family Laemophloeidae. There are 40 currently recognized species, known from all continents except Antarctica. Placonotus species are small (~2mm), elongate, flattened beetles, characterized by long filiform antennae, presence of a frontoclypeal suture, open anterior coxal cavities, and broadly rounded intercoxal process of abdominal ventrite III. Males have the 8th abdominal segment modified to form claspers used during mating.^[1] Adults and larvae are found under dead bark, where they feed on fungi. Currently recognized species are:

• Placonotus africanus Lefkovitch
• Placonotus arizonensis Thomas
• Placonotus bolivari Grouvelle
• Placonotus debanus Mukhopadhyay
• Placonotus decoratus Grouvelle
• Placonotus dolce Lefkovitch
• Placonotus donacioides Wollaston
• Placonotus ealaensis Lefkovitch
• Placonotus embuensis Thomas
• Placonotus exornatus Grouvelle
• Placonotus falinorum Thomas
• Placonotus gladiator Thomas
• Placonotus granulatus Wollaston
• Placonotus himalaicus Mukhopadhyay & Sen Gupta
• Placonotus infimus Sharp
• Placonotus keralicus Mukhopadhyay & Sen Gupta
• Placonotus macrognathus Thomas
• Placonotus majus Lefkovitch
• Placonotus maya Thomas
• Placonotus mestus Lefkovitch
• Placonotus modestus Say
• Placonotus mossus Lefkovitch
• Placonotus nitens LeConte
• Placonotus orientalis Grouvelle
• Placonotus pallentipennis Reitter
• Placonotus patruelis Thomas
• Placonotus planifrons Thomas
• Placonotus politissimus Wollaston
• Placonotus proximus Grouvelle
• Placonotus pseudomodestus Thomas
• Placonotus pseudoproximus Mukhopadhyay & Sen Gupta
• Placonotus rigidus Olliff
• Placonotus saudicus Slipinski
• Placonotus subgranulatus Grouvelle
• Placonotus subtestaceus Grouvelle
• Placonotus subtruncatus Lefkovitch
• Placonotus tastus Lefkovitch
• Placonotus testaceus Fabricius
• Placonotus torsus Mukhopadhyay & Sen Gupta
• Placonotus zimmermanni LeConte

Placonotus
Placonotus macrognathus
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Coleoptera
Suborder:	Polyphaga
Infraorder:	Cucujiformia
Superfamily:	Cucujoidea
Family:	Laemophloeidae
Genus:	Placonotus MacLeay, 1871

The genus has been treated taxonomically for several geographical regions: the New World;^[1] Africa;^[2] Europe;^[3] and India.^[4] The Asian, Pacific, and Australian faunas have not been worked and there are probably many unassigned and undescribed species.