List of species named simplex

The species name simplex (Latin for "simple") occurs frequently in binomial names throughout the taxonomy of life. Examples include:

Monocots

 * Amitostigma simplex, a species of plant in the family Orchidaceae
 * Bulbophyllum simplex, a species of orchid in the genus Bulbophyllum
 * Coelogyne simplex, a species of orchid
 * Puccinellia simplex, a species of grass known by the common names western alkali grass and California alkali grass
 * Oenocarpus simplex, a species of flowering plant in the family Arecaceae
 * Vriesea simplex, a species of the genus Vriesea

Eudicots

 * Acacia simplex, perennial climbing tree native to islands in the western part of the Pacific Ocean
 * Buddleja simplex, a small shrub, probably extinct, as no record of it has been made for nearly 200 years
 * Brassaiopsis simplex, a species of plant in the family Araliaceae
 * Echium simplex (Tower of jewels), herbaceous biennial plant up to 3 m in height on the island of Tenerife mainly in Macizo de Anaga
 * Firmiana simplex, the Chinese parasol tree or wutong, an ornamental plant or tree of the cacao, or chocolate family Sterculiaceae of the order Malvales, native to Asia
 * Gentianopsis simplex, a species of flowering plant in the gentian family known by the common name oneflower fringed gentian
 * Gymnophragma simplex, a species of flowering plant belonging to the family Acanthaceae
 * Pseudopanax simplex, a species of evergreen plant
 * Stirlingia simplex, plant endemic to Western Australia
 * Thalictrum simplex, a species of plant in the family Ranunculaceae
 * Utricularia simplex, commonly known as bluecoats, is a very small perennial carnivorous plant that belongs to the genus Utricularia

Fungi

 * Acrodontium simplex, ascomycete fungus that is a plant pathogen
 * Pleomeris simplex or Puccinia hordei, a plant pathogen

Cnidaria

 * Nemiana simplex, the only species in Nemiana, a genus of simple, sessile organisms
 * Protanthea simplex, a species of sea anemone found in deep water off the coasts of north west Europe
 * Tubularia simplex, or oaten pipes hydroid, a species of hydroid native to the northeast Atlantic Ocean, North Sea, Norwegian Sea, and English Channel

Bivalves

 * Anomia simplex, or the common jingle shell, a species of bivalve mollusc in the family Anomiidae

Gastropods (snails and slugs)

 * Arinia simplex, a species of small land snails with an operculum, terrestrial gastropod mollusks in the family Diplommatinidae
 * Bittium simplex, a species of sea snail, a marine gastropod mollusk in the family Cerithiidae
 * Blanfordia simplex, a species of land snail that has an operculum, a terrestrial gastropod mollusk in the family Pomatiopsidae
 * Boucardicus simplex, a species of land snail with an operculum, a terrestrial gastropod mollusk in the family Cyclophoridae
 * Calliostoma simplex, a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae
 * Cirsonella simplex, minute sea snail, a marine gastropod mollusc in the family Turbinidae
 * Cristilabrum simplex, a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Camaenidae
 * Enatimene simplex, a species of sea snail, a marine gastropod mollusk in the family Muricidae, the murex snails or rock snails
 * Eulimella simplex, a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies
 * Janoliva simplex, a species of sea snail, a marine gastropod mollusk in the family Olividae, the olives
 * Mohnia simplex, a species of sea snail, a marine gastropod mollusk in the family Buccinidae, the true whelks
 * Natica simplex, a species of predatory sea snail, a marine gastropod mollusk in the family Naticidae, the moon snails
 * Obesotoma simplex, a species of sea snail, a marine gastropod mollusk in the family Mangeliidae
 * Opisthostoma simplex, a species of minute land snail with an operculum, a terrestrial gastropod mollusk in the family Diplommatinidae
 * Pepta simplex, a species of sea snail, a marine gastropod mollusk in the family Cancellariidae, the nutmeg snails
 * Pyrgulopsis simplex or fossil springsnail, a species of minute freshwater spring snails, aquatic gastropod mollusks or micromollusks in the family Hydrobiidae
 * Serrata simplex, a species of sea snail, a marine gastropod mollusk in the family Marginellidae, the margin snails
 * Sukashitrochus simplex or Sukashitrochus morleti, a species of sea snail, a marine gastropod mollusk in the family Scissurellidae

Arachnids

 * Argiope simplex or Argiope trifasciata, also called banded garden spider in the USA, a species of spider found around the world
 * Digamasellus simplex, mite in the family Digamasellidae
 * Gamasellus simplex, in the genus of mites in the family Ologamasidae
 * Halolaelaps simplex, family of mites in the order Mesostigmata

Crustaceans

 * Acartia simplex, a species of marine copepod belonging to the family Acartiidae
 * Asconiscus simplex, the only species in the genus Asconiscus, family of marine isopod crustaceans in the suborder Cymothoida
 * Branchinella simplex, a species of crustacean in the family Thamnocephalidae
 * Ovatis simplex, a species of crabs in the family Xanthidae, the only species in the genus Ovatis
 * Paradiaptomus simplex, a species of copepod in the family Diaptomidae
 * Tropodiaptomus simplex, copepod in the family Diaptomidae

Lepidoptera (butterflies and moths)
Moths of the family Noctuidae:
 * Achaea simplex, a species of moth of the family Noctuidae
 * Avatha simplex, a species of moth of the family Noctuidae
 * Cyligramma simplex, moth of the family Noctuidae
 * Penicillaria simplex, moth of the family Noctuidae
 * Plusia simplex or Anagrapha falcifera, a moth of the family Noctuidae
 * Schinia simplex, moth of the family Noctuidae
 * Schrankia simplex or Schrankia altivolans, moth of the family Noctuidae
 * Speiredonia simplex, a species of moth of the family Noctuidae

Other lepidopterans:
 * Aloeides simplex, a butterfly of the family Lycaenidae
 * Anatrachyntis simplex, moth in the family Cosmopterigidae
 * Azygophleps simplex, moth in the family Cossidae
 * Chilo simplex or Chilo suppressalis, moth of the family Crambidae
 * Coleophora simplex, moth of the family Coleophoridae
 * Endotricha simplex, a species of snout moths in the genus Endotricha
 * Eriogaster simplex or Panacela lewinae is a moth of the family Eupterotidae
 * Eulophota simplex, a species of snout moths in the genus Eulophota
 * Hemistola simplex, moth of the family Geometridae
 * Oroplema simplex, a species of moth of the family Uraniidae
 * Proutiella simplex, moth of the family Notodontidae

Other insects

 * Anabrus simplex or Mormon cricket, large insect that can grow to almost three inches in length
 * Chlaenius simplex, a ground beetle in the large and diverse genus Chlaenius
 * Holcobius simplex, beetle species in the family Anobiidae
 * Mirosternus simplex, beetle species in the family Anobiidae
 * Rhadinosticta simplex or Rhadinosticta, a species of damselfly in the family Isostictidae
 * Rhamphomyia simplex, a species of dance fly, in the fly family Empididae
 * Thesprotia simplex, common name grass mantis, is a species of praying mantis found in Brazil
 * Urophora simplex, a species of tephritid or fruit flies in the genus Urophora of the family Tephritidae

Birds

 * Anthreptes simplex or plain sunbird, a species of bird in the family Nectariniidae
 * Calamonastes simplex or grey wren warbler, a species of bird in the family Cisticolidae
 * Chlorocichla simplex or simple greenbul, a species of songbird in the family Pycnonotidae
 * Columba simplex or lemon dove or cinnamon dove, a bird species in the pigeon family (Columbidae)
 * Geoffroyus simplex, blue-collared parrot, simple parrot, lilac-collared song parrot, or lilac-collared Geoffroy's parrot, found in New Guinea
 * Myrmothera simplex or tepui antpitta or brown-breasted antpitta, a species of bird in the family Formicariidae
 * Pachycephala simplex or grey whistler, a species of bird in the family Pachycephalidae
 * Passer simplex or desert sparrow, a bird of the sparrow family Passeridae
 * Phaetusa simplex or large-billed tern, a species of tern in the family Sternidae
 * Piculus simplex or Rufous-winged Woodpecker, a species of bird in the family Picidae
 * Pogoniulus simplex or green tinkerbird, a species of bird in the family Lybiidae
 * Pseudotriccus simplex or hazel-fronted pygmy tyrant, a species of bird in the family Tyrannidae
 * Pycnonotus simplex or cream-vented bulbul, a species of songbird in the family Pycnonotidae
 * Rhytipterna simplex or greyish mourner, a species of bird in the family Tyrannidae
 * Sporophila simplex or drab seedeater, a species of bird in the family Thraupidae

Other vertebrates

 * Betta simplex, a species of fish in the family Osphronemidae
 * Hesperomys simplex, a species of rodent in the family Cricetidae from south-central South America
 * Hyla simplex, a species of frog in the family Hylidae
 * Melanophryniscus simplex, a species of toad in the family Bufonidae
 * Sarcoglanis simplex, a species of catfish (order Siluriformes) of the family Trichomycteridae, and the only species of the genus Sarcoglanis