The species name planus (Latin for "flat" or "plain") occurs frequently in binomial names throughout the taxonomy of life. Examples include:
Arthropods Arachnids (spiders, ticks, and mites) 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 Epicadus planus, a species of spider in the genus Epicadus in the family Thomisidae Hoplobunus planus, a species of harvestman in the family Stygnopsidae 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 Psellonus planus, a species of spider in the genus Psellonus in the family Philodromidae; see List of spiders of India Pseudoparasitus planus, a species of mite in the genus Pseudoparasitus Pyrnus planus, a species of spider in the genus Pyrnus in the family Trochanteriidae 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 Trachelas planus, a species of spider in the genus Trachelas in the family Trachelidae
Insects Beetles Agrypnus planus, a click beetle in the genus Agrypnus Aneflus planus, in the family Cerambycidae Brachys planus, in the genus Brachys in the family Buprestidae Brochocoleus planus, in the genus Brochocoleus in the family Ommatidae Canthyporus planus, in the genus Canthyporus in the family Dytiscidae Carabus perrini planus, in the family Carabidae Carabus planus, a synonym of Pheropsophus aequinoctialis, a ground beetle Catogenus planus, in the genus Catogenus in the family Passandridae Dermestes planus, in the genus Dermestes in the family Dermestidae Distichus planus, in the genus Distichus in the family Carabidae Gonicoelus planus, in the genus Gonicoelus in the family Biphyllidae Grynobius planus, in the family Anobiidae Hydroporus planus, a water beetle in the genus Hydroporus Leptotrachelus planus, in the genus Leptotrachelus in the family Carabidae Lionychus planus, in the genus Lionychus in the family Carabidae Oesyperus planus, in the genus Oesyperus in the family Carabidae Pachyscelus planus, in the genus Pachyscelus in the family Buprestidae Philophlaeus planus, in the genus Philophlaeus in the family Carabidae Protorabus planus, in the subfamily Protorabinae in the family Carabidae Pterostichus planus, a ground beetle in the genus Pterostichus
Other insects Blissus planus, a species of true bug in the genus Blissus in the family Blissidae Camponotus planus, a species of carpenter ant; see List of Camponotus species Coccophagus planus, a species of chalcid wasp in the genus Coccophagus Larinus planus, a species of true weevil Smerinthus planus, The oriental eyed hawkmoth, a moth of the family Sphingidae 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 arthropods Leptodius planus, a species of crab in the genus Leptodius in the family Xanthidae Metacyclops planus, a species of copepod crustacean in the genus Metacyclops in the family Cyclopidae Polydesmus planus, a species of millipede in the genus Polydesmus Styloniscus planus, a species of woodlouse in the genus Styloniscus
Mollusca Craspedites planus, an extinct species of ammonoid cephalopod in the genus Craspedites Pseudaspidites planus, an extinct species of mollusc in the genus Pseudaspidites; see 2012 in molluscan paleontology Sigaretornus planus, a species in the genus Tornus (gastropod) Tornus planus, a synonym of Sigaretornus planus Trochus planus, a synonym of Bembicium nanum, a species of sea snail
Plants Heteroscyphus planus, a species of Marchantiophyta (liverwort) Pandanus planus, a synonym of Pandanus tectorius, a species of screwpine Syngonanthus planus, a species of plant in the genus Syngonanthus in the family Eriocaulaceae
Vertebrates Birds Caracara planus, the crested caracara (also known as the carancho), a bird of prey in the family Falconidae Palaeospheniscus planus, incorrect name for the extinct species of penguin Palaeospheniscus bergi Pseudospheniscus planus, incorrect name for the extinct species of penguin Palaeospheniscus bergi
Mammals Bransatoglis planus, an extinct species of dormouse Eucastor planus, an extinct species of beaver found in the Hawthorn Group
Sharks and other cartilaginous fish 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) 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 Sphenodus planus, an extinct species of shark in the genus Sphenodus in the family Orthacodontidae
Other vertebrates Callionymus planus, a species of dragonet native to the shallow Pacific waters off southern Japan Dicynodon planus, a synonym of Oudenodon bainii, an extinct dicynodont in the genus Oudenodon Ferganosuchus planus, the type species of Ferganosuchus, an extinct genus of gavialid crocodilian
Other species Argopatagus planus, a species of sea urchin of the family Macropneustidae Botrylloides planus, a synonym of Botryllus planus, a sea squirt Botryllus planus, a species of colonial ascidian tunicate in the genus Botryllus in the family Styelidae Hyalodiscus planus, a species of diatom in the genus Hyalodiscus Microcosmus planus, a species of Microcosmus, a genus of tunicates in the family Pyuridae Vetustodermis planus, a soft-bodied middle Cambrian animal, a species in the genus Vetustovermis