planus

Planus is a surname of French origin. People with that name include:

• Marc Planus (born 1982), French footballer
• Pierre Planus (born 1979), French footballer

Planus is a Latin adjective meaning "flat" or "plain". It is part of the binomial name of several species, and of some other combination terms.

; Personal honorific or nickname

• Doctor Planus et utilis, a scholastic accolade awarded to the Franciscan teacher Nicholas of Lyra ({{circa}}1270{{ndash}}1349)

; In biology

• Agrypnus planus, a species of click beetle in the genus Agrypnus
• Aneflus planus, a species of beetle in the family Cerambycidae
• Argopatagus planus, a species of sea urchin of the family Macropneustidae
• Blissus planus, a species of true bug in the genus Blissus in the family Blissidae
• Botrylloides planus, a synonym of Botryllus planus
• Botryllus planus, a species of colonial ascidian tunicate in the genus Botryllus in the family Styelidae
• Brachys planus, a species of beetle in the genus Brachys in the family Buprestidae
• Bransatoglis planus, an extinct species of dormouse
• Brochocoleus planus, a species of beetle in the genus Brochocoleus in the family Ommatidae
• Callionymus planus, a species of dragonet native to the shallow Pacific waters off southern Japan
• Camponotus planus, a species of carpenter ant; see List of Camponotus species
• Canthyporus planus, a species of beetle in the genus Canthyporus in the family Dytiscidae
• Carabus perrini planus, a subspecies of beetle in the family Carabidae
• Carabus planus, a synonym of Pheropsophus aequinoctialis, a ground beetle
• Caracara planus, the crested caracara (also known as the carancho), a bird of prey in the family Falconidae
• Catogenus planus, a species of beetle in the genus Catogenus in the family Passandridae
• Cheliferoides planus, a species of spider in the genus Cheliferoides
• Cleptomartus planus, a synonym of Anthracomartus hindi, an extinct species of arachnid in the genus Anthracomartus in the family Anthracomartidae
• Coccophagus planus, a species of chalcid wasp in the genus Coccophagus
• Copodus planus, an extinct species of cartilaginous fish; see List of prehistoric cartilaginous fish genera
• Corax planus, an extinct species of shark in Corax (genus)
• Craspedites planus, an extinct species of ammonoid cephalopod in the genus Craspedites
• Dermestes planus, a species of beetle in the genus Dermestes in the family Dermestidae
• Dicynodon planus, a synonym of Oudenodon bainii, an extinct dicynodont in the genus Oudenodon
• Distichus planus, a species of beetle in the genus Distichus in the family Carabidae
• Epicadus planus, a species of spider in the genus Epicadus in the family Thomisidae; see List of Thomisidae species
• Eucastor planus, an extinct species of beaver found in the Hawthorn Group
• Ferganosuchus planus, the type species of Ferganosuchus, an extinct genus of gavialid crocodilian
• Gonicoelus planus, a species of beetle in the genus Gonicoelus in the family Biphyllidae
• Grynobius planus, a species of beetle in the family Anobiidae
• Heteroscyphus planus, a species of Marchantiophyta (liverwort)
• Hoplobunus planus, a species of harvestman in the family Stygnopsidae
• Hyalodiscus planus, a species of diatom in the genus Hyalodiscus
• Hydroporus planus, a species of water beetle in the genus Hydroporus
• Ischyodus planus, an extinct species of cartilaginous fish in the genus Ischyodus
• Isurus planus, also known as the hook-tooth mako, an extinct mako shark that lived during the Miocene epoch
• Larinus planus, a species of true weevil
• Leptodius planus, a species of crab in the genus Leptodius in the family Xanthidae
• Leptotrachelus planus, a species in the genus Leptotrachelus in the family Carabidae
• Lionychus planus, a species of beetle in the genus Lionychus in the family Carabidae
• Metacyclops planus, a species of copepod crustacean in the genus Metacyclops in the family Cyclopidae
• Microcosmus planus, a species of Microcosmus, a genus of tunicates in the family Pyuridae
• Oesyperus planus, a species of beetle in the genus Oesyperus in the family Carabidae
• Pachyscelus planus, a species of beetle in the genus Pachyscelus in the family Buprestidae
• Palaeospheniscus planus, incorrect name for the extinct species of penguin Palaeospheniscus bergi
• Pandanus planus, a synonym of Pandanus tectorius, a species of screwpine
• Penestomus planus, a species of spider in the genus Penestomus
• Philodromus planus, a species of philodromid crab spider in the genus Philodromus in the family Philodromidae; see List of Philodromidae species
• Philophlaeus planus, a species of beetle in the genus Philophlaeus in the family Carabidae
• Polydesmus planus, a species of millipede in the genus Polydesmus
• Protorabus planus, a species of beetle in the subfamily Protorabinae in the family Carabidae
• Psellonus planus, a species of spider in the genus Psellonus in the family Philodromidae; see List of spiders of India
• Pseudaspidites planus, an extinct species of mollusc in the genus Pseudaspidites; see 2012 in molluscan paleontology
• Pseudoparasitus planus, a species of mite in the genus Pseudoparasitus
• Pseudospheniscus planus, incorrect name for the extinct species of penguin Palaeospheniscus bergi
• Pterostichus planus, a species of ground beetle in the genus Pterostichus
• Pyrnus planus, a species of spider in the genus Pyrnus in the family Trochanteriidae; see List of Trochanteriidae species
• Rhipicephalus planus, a species of tick in the genus Rhipicephalus in the family Ixodidae
• Senoculus planus, a species of spider in the genus Senoculus in the family Senoculidae
• Sigaretornus planus, a species in the genus Tornus (gastropod)
• Smerinthus planus, The oriental eyed hawkmoth, a moth of the family Sphingidae
• Sphenodus planus, an extinct species of shark in the genus Sphenodus in the family Orthacodontidae
• Styloniscus planus, a species of woodlouse in the genus Styloniscus
• Syngonanthus planus, a species of plant in the genus Syngonanthus in the family Eriocaulaceae
• Tornus planus, a synonym of Sigaretornus planus
• Trachelas planus, a species of spider in the genus Trachelas in the family Trachelidae; see List of Trachelidae species
• Trochus planus, a synonym of Bembicium nanum, a species of sea snail
• Vetustodermis planus, a soft-bodied middle Cambrian animal, a species in the genus Vetustovermis
• Wilcoxius planus, a species of robber fly (or, assassin fly) in the genus Wilcoxius in the family Asilidae; see List of Asilidae species: W

; Other uses

• Cantus planus, Latin for plainsong (or, plainchant), a body of chants used in the liturgies of the Western Church
• Lichen planus, a disease of the skin and/or mucous membranes that resembles lichen
• Pes planus, a medical term for flat feet (or, fallen arches), a postural deformity in which the arches of the foot collapse